JP3515924B2 - Monitoring and control equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supervisory control device for a biological water treatment process or the like.

[0002]

2. Description of the Related Art Among pollutants contained in sewage, salts of nitrogen and phosphorus are called nutrient salts, and if released untreated, they will cause harmful algae such as red tide and water-bloom to propagate. . Nutrient salts are particularly likely to accumulate in closed water areas such as lakes and bays, and so-called "eutrophication pollution" has become a social problem.

"Water treatment engineering" (edited by Tetsuo Ide, Kogakudo)
As described in (1), the activated sludge method is a general method for treating municipal wastewater and organic wastewater. The activated sludge method oxidizes organic matter, which is the main pollutant in sewage, by accumulating a group of microorganisms (activated sludge) that have a purification function in a biological reaction tank and aerating this while thoroughly mixing and contacting sewage. It is a method of disassembling. The mixed liquid after the aeration treatment is separated into supernatant water and activated sludge in the settling tank, the supernatant water is discharged out of the system, and the concentrated activated sludge is returned to the biological reaction tank again.

The activated sludge method is a treatment method whose main purpose is to biologically oxidatively decompose organic matter, and nitrogen and phosphorus in the sewage cannot be sufficiently removed as they are. Therefore, "Advanced treatment facility design manual (draft)"
(The Japan Sewerage Association, 1994) ”, a modified activated sludge process has been developed that applies the chemical reaction and the function of certain microorganisms.

For example, in the anaerobic aerobic activated sludge method, when phosphorus accumulating bacteria in the activated sludge are placed in a state where there are no oxidizing substances such as oxygen and nitrate nitrogen, that is, in an anaerobic state, phosphoric acid is converted from the body into the liquid phase. This is a biological phosphorus removal method that utilizes the fact that when phosphorus is discharged and placed in a state with oxygen, that is, an aerobic state, the amount of phosphoric acid phosphorus released in the liquid phase is ingested into the body. . That is, the biological reaction tank in the activated sludge method should be composed of two anaerobic tanks and an aerobic tank. This reduces phosphorus in the sewage. It is generally known that the larger the phosphorus discharge amount in the anaerobic state, the larger the intake amount in the aerobic state, and the higher the phosphorus removal rate.

[0006] The circulating nitrification denitrification method has the functions of nitrifying bacteria in activated sludge (oxidizing ammonia to nitric acid under aerobic conditions) and denitrifying bacteria (reducing nitric acid to nitrogen gas under anaerobic conditions). It is a method of treating nitrogen in sewage in combination. That is, the reaction tank in the activated sludge method is composed of two denitrification tanks and a nitrification tank, and a circulation line from the nitrification tank to the denitrification tank is provided to realize biological nitrogen removal by nitrification and denitrification. .

In order to improve the treatment performance of such a biological nitrogen / phosphorus removal process, the following control system has been proposed.

FIG. 45 is a biological phosphorus removal process described in "Control method for anaerobic aerobic activated sludge method using automatic water quality monitor (7th EICA Research Presentation, p91-96)". It is a block diagram which shows an example of the control apparatus of FIG.

In FIG. 45, 1 is an anaerobic tank and 2 is an aerobic tank. a is a pipe for introducing sewage into the anaerobic tank 1. Reference numeral 3 is an air supply device provided in the aerobic tank 2. Four
Is a settling tank, which is connected to the aerobic tank 2 through a pipe b. Reference numeral c is a pipe for discharging the supernatant water after the precipitation treatment, which is connected to the precipitation tank 4. d is a pipe for extracting sludge, which is also connected to the settling tank 4.
Reference numeral e is a pipe for discharging a part of the extracted sludge to the outside of the system, which is connected to the pipe d. Reference numeral 5 denotes a pump for returning the remaining sludge to the anaerobic tank, which is connected to the settling tank 4 via the pipe d and to the anaerobic tank 1 via the pipe f.

Reference numeral 8 denotes a pump for collecting the test water from the anaerobic tank 1, which is connected to a pipe 8a provided in the anaerobic tank 1. Reference numeral 6 denotes a phosphorus concentration meter for measuring the phosphorus concentration in the test water, which is connected to the pump 8 via the pipe 8b. Reference numeral 12 is a controller for adjusting the flow rate of the returning sludge pump 5 in accordance with the measured value of the phosphorus concentration meter 6, and the phosphorus concentration meter 6 via the signal line 6a and the returning sludge pump 5 via the signal line 12a. Connected with.

Next, the operation will be described.

Sewage is introduced into the anaerobic tank 1 through the pipe a. In the anaerobic tank 1, phosphorus is discharged from the activated sludge. Next, in the aerobic tank 2, excessive intake of phosphorus into the activated sludge occurs, and the phosphorus component in the sewage is removed. Air required for this aerobic treatment is supplied from the air supply device 3.

The mixed liquid of sewage and activated sludge in the aerobic tank 2 is sent to the settling tank 4 via a pipe b. In the settling tank 4, the mixed liquid is settled and separated into supernatant water and sludge. The supernatant water is discharged out of the system through the pipe c. The sludge in the settling tank 4 is drawn out via the pipe d. A part of the extracted sludge is discharged to the outside of the system through the pipe e. Others are returned to the anaerobic tank 1 via the return sludge pump 5 and the pipe f.

The phosphorus concentration Pana in the anaerobic tank 1 is measured by a phosphorus concentration meter 6. The test water is sent to the phosphorus concentration meter 6 via the pipe 8a, the pump 8 and the pipe 8b. The controller 12 measures the phosphorus concentration Pana in the anaerobic tank 1 and its target value Pana *.
The flow rate Qret of the returning sludge pump 5 is adjusted in accordance with the above.
The calculation of Qret follows Formula (1), for example.

[0015]     Qret = k1 (Pana-Pana *) + Qret0 (1) here k1: constant Qret0: constant

As a result, when Pana is smaller than Pana *, Qret is reduced and Pana is increased. Therefore, since the phosphorus discharge amount in the anaerobic tank 1 is maintained, stable biological phosphorus removal can be realized.

The phosphorus concentration P in the anaerobic tank 1 required for this calculation
ana is transmitted from the phosphorus concentration meter 6 via the signal line 6a. The output Qret of the controller 12 is the signal line 12a.
It is transmitted to the returning sludge pump 5 via.

[0018]

By such an operation, the conventional controller for the biological phosphorus removal process has been designed to keep the phosphorus concentration in the anaerobic tank constant and realize stable biological phosphorus removal. However, there is a problem that it is necessary to analyze the treated water regularly in order to confirm that the treated water quality is actually kept good and stable.

In order to save this trouble, there is a method of separately providing a phosphorus concentration meter for measuring the phosphorus concentration in the treated water, but it is too expensive to have two expensive phosphorus concentration meters. There was a problem.

The present invention has been made in order to solve the above problems, and an object thereof is to obtain a useful monitor and control device which can efficiently operate one automatic water quality measuring device for control and monitoring. There is.

[0021]

According to a first aspect of the present invention, there is provided a supervisory control device comprising: a sampling position switching means capable of selecting a sampling position of a measurement object during a water treatment process; and two or more of the sampling positions . Pump and
It is connected by piping through the switching valve, and the switching valve is turned off.
By replacing them, the two or more sampling positions
Or a measuring device for measuring process data from one of Chi, either accumulate or display the process data measured in accordance with the selected sampling positions as monitoring data, used for calculation of the operation setting value as the control data And a controller for determining.

The monitoring control apparatus according to claim 2 of the present invention comprises:
The controller is provided with a function of selecting a sampling position according to the process data and instructing the sampling position switching means.

The monitoring control apparatus according to claim 3 of the present invention comprises:
The controller is provided with a function of selecting a sampling position according to a predetermined time and instructing the sampling position switching means.

The monitoring control apparatus according to claim 4 of the present invention comprises:
The controller is provided with a function of selecting a sampling position according to process data outside the process system and instructing the sampling position switching means.

The monitoring control apparatus according to claim 5 of the present invention is
The controller is provided with a function of instructing the measurement frequency of the data measuring means according to the selected sampling position.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1 Embodiments according to claims 1 and 2 of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing a monitoring control device of a biological water treatment process according to a first embodiment.

Reference numeral 7 is a valve for switching the sampling position, which is connected to the anaerobic tank 1 via the pipe 7a and also to the pipe 7b.
It is connected to the aerobic tank 2 via. Reference numeral 8 denotes a pump for supplying the sample water to be measured to the phosphorus concentration meter 6, which is connected to the valve 7 via the pipe 7c and to the phosphorus concentration meter 6 via the pipe 8a.

Reference numeral 9 denotes a controller for switching the sampling position according to the measured value of the phosphorus concentration meter 6, which is connected to the phosphorus concentration meter 6 via the signal line 6a and to the valve 7 via the signal line 9c. There is. Reference numeral 10 denotes a storage circuit for accumulating the measurement value of the phosphorus concentration meter 6 as monitoring data, which is connected to the controller 9 via a signal line 9a.

Reference numeral 90 denotes a setting device for setting a target value of the phosphorus concentration in the treated water, which is connected to the controller 9 via a signal line 90a. Further, reference numeral 91 is a setting device for setting a target value of the phosphorus concentration in the anaerobic tank, which is connected to the controller 9 via a signal line 91a.

Reference numeral 12 is a controller that uses the measured value of the phosphorus concentration meter 6 as control data for calculating the operation set value, and is a controller 9 via a signal line 9b and a return sludge pump 5 via a signal line 12a. Connected with. Reference numeral 120 denotes a setting device for setting a target value of the phosphorus concentration in the anaerobic tank, which is connected to the controller 120 via a signal line 120a.
The setting device 120 may be the same as the setting device 91.
Others are the same as in FIG.

Next, the operation will be described.

Normally, the phosphorus concentration meter 6 measures the phosphorus concentration in the treated water. The test water is pipe c, pipe 7b, valve 7,
It is sent to the phosphorus concentration meter 6 through the pipe 7c, the pump 8 and the pipe 8a.

The measured value of the phosphorus densitometer 6 is sent to the controller 9 via the signal line 6a. The controller 9 measures the value measured by the phosphorus concentration meter 6 (here, the phosphorus concentration Pou in the treated water).
t) is compared with a predetermined target value Pout *. Po
ut * is sent from the setter 90 to the controller 9 via the signal line 90a. When Pout is smaller than Pout *, the valve 7 is not switched and the sampling of the treated water is continued.

While the phosphorus concentration of the treated water is being measured, the measured value Pout is stored in the memory circuit 10 as monitoring data. Pout is sent to the memory circuit 10 via the signal line 9a.

On the other hand, when Pout exceeds Pout *, the controller 9 starts sampling from the anaerobic tank 1. This instruction is transmitted to the valve 7 via the signal line 9c. The valve 7 opens the valve between the pipe 7a and the pipe 7c, and starts sampling from the anaerobic tank 1. The test water is sent to the phosphorus concentration meter 6 via the pipe 7c, the pump 8 and the pipe 8a.

The measured value of the phosphorus densitometer 6 is sent to the controller 9 via the signal line 6a. The controller 9 measures the value measured by the phosphorus concentration meter 6 (here, the phosphorus concentration Pan in the anaerobic tank).
a) is compared with a predetermined target value Pana *. Pa
na * is sent from the setter 91 to the controller 9 via the signal line 91a. When Pana is smaller than Pana *, the valve 7 is not switched and sampling in the anaerobic tank 1 is continued.

While the phosphorus concentration in the anaerobic tank is being measured, the measured value Pana is sent as control data to the controller 12 via the signal line 9b. The controller 12 measures the measured value Pana.
The flow rate of the returning sludge pump 5 is adjusted according to the deviation between the target value Pana * and a predetermined target value Pana *. Pana * is signal line 12
It is sent from the setter 120 to the controller 12 via 0a.
This calculation is performed, for example, according to the equation (1). Controller 1
The output of 2 is transmitted to the returning sludge pump 5 via the signal line 12a.

As a result of the adjustment of the amount of sludge to be returned, if Pana is equal to or exceeds Pana * for a certain period of time, the controller 9 restarts the sampling of treated water. This instruction is transmitted to the valve 7 via the signal line 9c.

By the above operation, the treated water phosphorus concentration is normally measured as monitoring data, but when the treated water phosphorus concentration exceeds the target value, the anaerobic tank phosphorus concentration is switched to the returned sludge. Since it can be used for adjusting the amount, one phosphorus concentration meter can be efficiently operated for monitoring and control.

Embodiment 2 Another embodiment according to claims 1 and 2 of the present invention will be described with reference to the drawings. FIG. 2 is a block diagram showing a monitoring control device of a biological water treatment process according to the second embodiment.

Reference numeral 81 is a pump for sampling from the anaerobic tank 1, which is connected to the anaerobic tank 1 via a pipe 81a and to the phosphorus concentration meter 6 via a pipe 81b. Reference numeral 82 is a pump for sampling a part of the treated water,
The pipe c is connected via a pipe 82a, and the phosphorus concentration meter 6 is connected via a pipe 82b. The controller 9 is the signal line 9
pump 81 via c and pump 8 via signal line 9d
It is connected to 2. Others are the same as in FIG.

Next, the operation will be described.

Normally, the phosphorus concentration meter 6 measures the phosphorus concentration in the treated water. The test water is sent to the phosphorus concentration meter 6 via the pipe c, the pipe 82a, the pump 82, and the pipe 81b.

The measured value of the phosphorus densitometer 6 is sent to the controller 9 via the signal line 6a. The controller 9 measures the value measured by the phosphorus concentration meter 6 (here, the phosphorus concentration Pou in the treated water).
t) is compared with a predetermined target value Pout *. Po
ut * is sent from the setter 90 to the controller 9 via the signal line 90a. When Pout is smaller than Pout *, the pump is not switched and the sampling of the treated water is continued.

While the phosphorus concentration of the treated water is being measured, the measured value Pout is stored in the memory circuit 10 as monitoring data. Pout is sent to the memory circuit 10 via the signal line 9a.

On the other hand, when Pout exceeds Pout *, the controller 9 starts sampling from the anaerobic tank 1. This instruction is sent to the pump 8 via the signal line 9d.
2 and to the pump 81 via the signal line 9c. The pump 82 stops. The pump 81 starts sampling from the anaerobic tank 1. The test water is pipe 81a,
It is sent to the phosphorus concentration meter 6 via the pump 81 and the pipe 81b.

The measured value of the phosphorus concentration meter 6 is sent to the controller 9 via the signal line 6a. The controller 9 measures the value measured by the phosphorus concentration meter 6 (here, the phosphorus concentration Pan in the anaerobic tank).
a) is compared with a predetermined target value Pana *. Pa
na * is sent from the setter 91 to the controller 9 via the signal line 91a. When Pana is smaller than Pana *, the pump is not switched and sampling in the anaerobic tank 1 is continued.

While the phosphorus concentration in the anaerobic tank is being measured, the measured value Pana is sent as control data to the controller 12 via the signal line 9b. The controller 12 measures the measured value Pana.
The flow rate of the returning sludge pump 5 is adjusted according to the deviation between the target value Pana * and a predetermined target value Pana *. Pana * is signal line 12
It is sent from the setter 120 to the controller 12 via 0a.
The output of the controller 12 is transmitted to the returning sludge pump 5 via the signal line 12a.

As a result of adjusting the amount of sludge to be returned, if Pana is equal to or exceeds Pana * for a certain period of time, the controller 9 restarts sampling of treated water. This instruction is sent to the pump 81 via the signal line 9c.
To the pump 82 via the signal line 9d.

By the above operation, the phosphorus concentration of the treated water is normally measured as monitoring data, but when the phosphorus concentration of the treated water exceeds the target value, the phosphorus concentration of the anaerobic tank is switched to the measurement and the sludge is returned. Since it can be used for adjusting the amount, one phosphorus concentration meter can be efficiently operated for monitoring and control.

Third Embodiment Another embodiment according to claims 1 and 2 of the present invention will be described with reference to the drawings. FIG. 3 is a block diagram showing a monitoring control device of a biological water treatment process according to the third embodiment.

Reference numeral 40 is a tank for storing a drug for promoting the discharge of biological phosphorus, such as acetic acid. Four
Reference numeral 1 is a pump for adding a chemical, which is a tank 40 via a pipe 40a and an anaerobic tank 1 via a pipe 41a.
Connected with. The pump 41 is also connected to the controller 12 via the signal line 12a. Others are the same as in FIG.

Next, the operation will be described.

The operation is almost the same as that of the first embodiment,
Only the operation of the controller 12 is different. The controller 12 has a measured value P
The flow rate Q41 of the chemical | medical agent addition pump 41 is adjusted according to the deviation of ana and the predetermined target value Pana *. This calculation is performed, for example, according to the equation (2).

[0055] Q41 = K3 (Pana * -Pana) (2) here K21: constant

If Pana is equal to or exceeds Pana * for a certain period of time as a result of the adjustment of the amount of added chemicals, the controller 9 restarts sampling of treated water. This instruction is transmitted to the valve 7 via the signal line 9c. Others are the same as those in the first embodiment.

By the above operation, the phosphorus concentration of the treated water is normally measured as the monitoring data, but when the phosphorus concentration of the treated water exceeds the target value, the measurement is switched to the phosphorus concentration of the anaerobic tank to add the chemical. Since it can be used for adjusting the amount, one phosphorus concentration meter can be efficiently operated for monitoring and control.

Fourth Embodiment Another embodiment according to claims 1 and 2 of the present invention will be described with reference to the drawings. FIG. 4 is a block diagram showing a monitoring control device of a biological water treatment process according to the fourth embodiment.

Reference numeral 40 is a tank for storing a drug for promoting biological phosphorus discharge, such as acetic acid. Four
Reference numeral 1 is a pump for adding a chemical, which is connected to the tank 40 via a pipe 40a and to the anaerobic tank 1 via a pipe 41a. The pump 41 is also connected to the controller 12 via the signal line 12a. Others are the same as in FIG.

Next, the operation will be described.

The operation is almost the same as that of the second embodiment,
Only the operation of the controller 12 is different. The controller 12 has a measured value P
The flow rate Q41 of the chemical | medical agent addition pump 41 is adjusted according to the deviation of ana and the predetermined target value Pana *. This calculation is performed, for example, according to the equation (2). As a result of adjusting the amount of drug added, Pana remains Pana for a certain period of time.
If it is equal to or more than *, the controller 9 starts sampling the treated water again. This instruction is transmitted to the pump 81 via the signal line 9c and to the pump 82 via the signal line 9d. Others are the same as those in the second embodiment.

By the above operation, the phosphorus concentration of the treated water is normally measured as the monitoring data, but when the phosphorus concentration of the treated water exceeds the target value, the phosphorus concentration of the anaerobic tank is switched to the measurement, and this is added. Since it can be used for adjusting the amount, one phosphorus concentration meter can be efficiently operated for monitoring and control.

Fifth Embodiment Another embodiment according to claims 1 and 2 of the present invention will be described with reference to the drawings. FIG. 5 is a configuration diagram showing a supervisory control device for a biological water treatment process according to a fifth embodiment.

Reference numeral 20 denotes a circulation pump for circulating the mixed liquid in the aerobic tank (nitrification tank) 2 to the anaerobic tank (denitrification tank) 1.
It is connected to the aerobic tank 2 and the anaerobic tank 1 via the pipe 20a.

Reference numeral 7a is a pipe for sampling from the aerobic tank 2. Further, 7b is a pipe for sampling a part of the treated water. Reference numeral 7 is a valve for switching the sampling position, which is connected to the pipe 7a and the pipe 7b. Reference numeral 8 is a pump for supplying the sampled test water to the ammonia nitrogen concentration meter 60, which is connected to the valve 7 via the pipe 7c and to the ammonia nitrogen concentration meter 60 via the pipe 8a.

Similarly, 70a is a pipe for sampling from the anaerobic tank 1. Further, 70b is a pipe for sampling a part of the treated water. Reference numeral 70 denotes a valve for switching the sampling position, which is connected to the pipe 70a and the pipe 70b. Reference numeral 80 denotes a pump for supplying the sampled test water to the nitrate nitrogen concentration meter 61, and the valve 70 and the pipe 8 via the pipe 70c.
It is connected to the nitrate nitrogen concentration meter 61 via 0a.

Reference numeral 9 is a controller for switching the sampling position according to the measured values of the ammonia nitrogen concentration meter 60 and the nitrate nitrogen concentration meter 61, and the signal line 60.
Ammonia nitrogen concentration meter 60 and signal line 61 via a
It is connected to the nitrate nitrogen concentration meter 61 via a. The valve 7 is also connected to the valve 7 via the signal line 9d and the valve 70 via the signal line 9e.

Reference numeral 90 denotes a setter for setting a target value of the total nitrogen concentration (or the sum of the ammoniacal nitrogen concentration and the nitrate nitrogen concentration) in the treated water, which is connected to the controller 9 via the signal line 90a. There is. Reference numeral 91 denotes a setting device for setting a target value of the ammonia nitrogen concentration in the aerobic tank, which is connected to the controller 9 via a signal line 91a.
Reference numeral 92 denotes a setting device for setting a target value of the concentration of nitrate nitrogen in the anaerobic tank, which is connected to the controller 9 via a signal line 92a.

Reference numeral 10 denotes a memory circuit for accumulating the measurement values of the ammonia nitrogen concentration meter 60 and the nitrate nitrogen concentration meter 61 as monitoring data, which is connected to the controller 9 via a signal line 9a. Reference numeral 11 denotes a controller for using the measured value of the ammonia nitrogen concentration meter 60 as the control data for the calculation of the operation set value, and the controller 9 via the signal line 9b and the air supply device 3 via the signal line 11a. Connected with. Reference numeral 110 denotes a setting device for setting a target value of the concentration of ammonia nitrogen in the aerobic tank, which is connected to the controller 110 via the signal line 100a. In addition,
The setter 110 may be the same as the setter 91.

Reference numeral 12 is a controller for using the measured value of the nitrate nitrogen concentration meter 61 as the control data for calculating the operation set value, and circulates through the controller 9 via the signal line 9c and the signal line 12a. It is connected to the pump 20. 1
Reference numeral 20 denotes a setting device for setting a target value of the concentration of nitrate nitrogen in the anaerobic tank, which is connected to the controller 12 via the signal line 120a. The setting device 120 may be the same as the setting device 92. Others are the same as in FIG.

Next, the operation will be described.

At normal times, the ammonia nitrogen concentration meter 60 and the nitrate nitrogen concentration meter 61 measure the respective nitrogen concentrations in the treated water. The test water is sent from the pipe c to the ammonia nitrogen concentration meter 60 via the pipe 7b, the valve 7, the pipe 7c, the pump 8 and the pipe 8a. Similarly, from the pipe c to the pipe 70b,
It is sent to the nitrate nitrogen concentration meter 61 via the valve 70, the pipe 70c, the pump 80, and the pipe 80a.

The measurement value of the ammonia nitrogen concentration meter 60 is sent to the controller 9 via the signal line 60a, and the measurement value of the nitrate nitrogen concentration meter 61 is sent to the controller 9 via the signal line 61a.
The controller 9 measures the value measured by the ammonia nitrogen concentration meter 60 (here, the ammonia nitrogen concentration NH4o in the treated water).
ut) and the measurement value of the nitrate nitrogen concentration meter 61 (here, the nitrate nitrogen concentration NO3out in the treated water) and a predetermined target value TNout * are compared. Target value TNout
* Is transmitted from the setting device 90 via the signal line 90a.
When NH4out + NO3out is smaller than TNout *, the valves 7 and 70 are not switched and the sampling of the treated water is continued.

While measuring the nitrogen concentration in the treated water,
The measured values NH4out and NO3out are stored in the storage circuit 10 as monitoring data. These values are sent to the memory circuit 10 via the signal line 9a.

On the other hand, NH4out + NO3out is TN
When out * is exceeded, the controller 9 starts sampling from the aerobic tank 1 and the anaerobic tank 2.
This instruction is sent to the valve 7 via the signal line 9d and the signal line 9e.
Is transmitted to the valve 70 via. The valve 7 opens the valve between the pipe 7a and the pipe 7c, and starts sampling from the aerobic tank 2. Further, the valve 70 opens the valve between the pipe 70 a and the pipe 70 c, and starts sampling from the anaerobic tank 1. At this time, the test water in the aerobic tank 2 is fed to the ammonia nitrogen concentration meter 60 via the pipe 7c, the pump 8 and the pipe 8a,
The test water in the anaerobic tank 1 is sent to the nitrate nitrogen concentration meter 61 via the pipe 70c, the pump 80, and the pipe 80a.

The measurement value of the ammonia nitrogen concentration meter 60 is sent to the controller 9 via the signal line 60a. Also,
The measurement value of the nitrate nitrogen concentration meter 61 is sent to the controller 9 via the signal line 61a. The controller 9 sets a measurement value of the ammonia nitrogen concentration meter 60 (here, the ammonia nitrogen concentration NH4aer in the aerobic tank 2) and a predetermined target value NH4aer *, and a measurement value of the nitrate nitrogen concentration meter 61. (Here, the concentration of nitrate nitrogen in the anaerobic tank 1 is NO3a.
na) is compared with a predetermined target value NO3ana *. The target value NH4aer * is transmitted from the setter 91 via the signal line 91, and the target value NO3ana * is transmitted from the setter 92 via the signal line 92a. NH4aer is NH
4aer * and NO3ana is NO3a
When it is larger than na *, the valves 7 and 70 are not switched and the sampling from the anaerobic tank 1 and the aerobic tank 2 is continued.

During this time, the measured value NH4aer is sent to the controller 11 as control data via the signal line 9b. The controller 11 measures the measured value NH4aer and the predetermined target value N
Flow rate Q of the air supply device 3 according to the deviation from H4aer *
Adjust air. This calculation is performed, for example, according to the following equation. The target value NH4aer * is the signal line 110a.
It is transmitted from the setting device 110 via.

[0078]     Qair = K3 (NH4aer-NH4aer *) (3) here K3: constant

The output of the controller 11 is sent to the air supply device 3 via the signal line 11a. This allows NH4aer
The air supply amount is increased until becomes equal to NH4aer *.

Similarly, the measured value NO3ana is sent as control data to the controller 12 via the signal line 9c. The controller 12 measures the measured value NO3ana and a predetermined target value N.
The flow rate Q of the circulation pump 20 according to the deviation from O3ana *
Adjust cyc. This calculation is performed, for example, according to the following equation. The target value NO3ana * is the signal line 120a.
It is transmitted from the setting device 120 via.

[0081]     Qcyc = Qcyc * + K4 (NO3ana-NO3ana *) (4) here K4: constant Qcyc *: constant

The output of the controller 12 is transmitted to the circulation pump 20 via the signal line 12a. As a result, NO3an
The circulation amount is increased until a matches NO3ana *.

As a result of these operations, NH
When 4out + NO3out is equal to or less than TNout *, the controller 9 starts sampling the treated water again. This instruction is transmitted to the valve 7 via the signal line 9d and to the valve 70 via the signal line 9e.

By the above operation, the nitrogen concentration of the treated water is normally measured as monitoring data, but when it exceeds the target value, the concentration of nitrate nitrogen in the anaerobic tank and the ammonia nitrogen in the aerobic tank are measured. Since the former can be used for adjusting the circulation amount and the latter for adjusting the air supply amount, one set of nitrate nitrogen concentration meter and ammonia nitrogen concentration meter can be efficiently used for monitoring and control. can do.

Embodiment 6 Another embodiment according to claims 1 and 2 of the present invention will be described with reference to the drawings. FIG. 6 is a configuration diagram showing a monitoring control device of a biological water treatment process according to the sixth embodiment.

Reference numeral 81 denotes a pump for sampling from the aerobic tank 2, which is connected to the aerobic tank 2 via a pipe 81a and to the ammonia nitrogen concentration meter 60 via a pipe 81b. Reference numeral 82 denotes a pump for sampling a part of the treated water, which is connected to the pipe c via the pipe 82a and the pipe 82.
It is connected to the ammoniacal nitrogen concentration meter 60 via b.

Reference numeral 83 is a pump for sampling from the anaerobic tank 1, which is connected to the anaerobic tank 1 via a pipe 83a and to the nitrate nitrogen concentration meter 60 via a pipe 83b. Reference numeral 84 denotes a pump for sampling a part of the treated water, which is connected to the pipe c via the pipe 84a and the nitrate nitrogen concentration meter 60 via the pipe 84b.

The controller 9 is connected to the pump 81 via the signal line 9d, the pump 82 via the signal line 9e, the pump 83 via the signal line 9f, and the pump 84 via the signal line 9g. . Others are the same as in FIG.

Next, the operation will be described.

At normal times, the ammonia nitrogen concentration meter 60 and the nitrate nitrogen concentration meter 61 measure the respective nitrogen concentrations in the treated water. The test water is from the pipe c to the pipe 82a and the pump 8
2, sent to the ammoniacal nitrogen concentration meter 60 via the pipe 81b. Similarly, from the pipe c to the pipe 84a and the pump 8
4, sent to the nitrate nitrogen concentration meter 61 via the pipe 83b.

The measurement value of the ammonia nitrogen concentration meter 60 is sent to the controller 9 via the signal line 60a, and the measurement value of the nitrate nitrogen concentration meter 61 is sent to the controller 9 via the signal line 61a.
The controller 9 measures the value measured by the ammonia nitrogen concentration meter 60 (here, the ammonia nitrogen concentration NH4o in the treated water).
ut) and the measurement value of the nitrate nitrogen concentration meter 61 (here, the nitrate nitrogen concentration NO3out in the treated water) and a predetermined target value TNout * are compared. Target value TNout
* Is transmitted from the setting device 90 via the signal line 90a.
When NH4out + NO3out is smaller than TNout *, the pump is not switched and the sampling of the treated water is continued.

While measuring the nitrogen concentration in the treated water,
The measured values NH4out and NO3out are stored in the storage circuit 10 as monitoring data. These values are sent to the memory circuit 10 via the signal line 9a.

On the other hand, NH4out + NO3out is TN
When it exceeds out *, the controller 9 starts sampling from the aerobic tank 2 and the anaerobic tank 1.
This instruction is sent to the pump 81 via the signal line 9d and the signal line 9
pump 82 via e, pump 8 via signal line 9f
3 and also to the pump 84 via signal line 9g.

As a result, the pump 82 and the pump 8 are
4 stops. The pump 81 starts sampling the aerobic tank 2, and the pump 83 starts sampling the anaerobic tank 1. The test water in the aerobic tank 2 is fed to the ammonia nitrogen concentration meter 60 via the pipe 81a, the pump 81, and the pipe 81b, and the test water in the anaerobic tank 1 is
It is sent to the nitrate nitrogen concentration meter 61 via the pipe 83a, the pump 83, and the pipe 83b.

The measurement value of the ammonia nitrogen concentration meter 60 is sent to the controller 9 via the signal line 60a. Also,
The measurement value of the nitrate nitrogen concentration meter 61 is sent to the controller 9 via the signal line 61a. The controller 9 sets a measurement value of the ammonia nitrogen concentration meter 60 (here, the ammonia nitrogen concentration NH4aer in the aerobic tank 2) and a predetermined target value NH4aer *, and a measurement value of the nitrate nitrogen concentration meter 61. (Here, the concentration of nitrate nitrogen in the anaerobic tank 1 is NO3a.
na) is compared with a predetermined target value NO3ana *. The target value NH4aer * is transmitted from the setter 9 via the signal line 91, and the target value NO3ana * is transmitted from the setter 92 via the signal line 92a. NH4aer is NH4
larger than aer * and NO3ana is NO3an
When it is larger than a *, the pump is not switched and sampling from the anaerobic tank 1 and the aerobic tank 2 is continued.

During this time, the measured value NH4aer is sent to the controller 11 via the signal line 9b as control data. The controller 11 measures the measured value NH4aer and the predetermined target value N
Flow rate Q of the air supply device 3 according to the deviation from H4aer *
Adjust air. This calculation is performed, for example, according to the equation (3). The output of the controller 11 is sent to the air supply device 3 via the signal line 11a.

Similarly, the measured value NO3ana is sent as control data to the controller 12 via the signal line 9c. The controller 12 measures the measured value NO3ana and a predetermined target value N.
The flow rate Q of the circulation pump 20 according to the deviation from O3ana *
Adjust cyc. This calculation is performed, for example, according to the equation (4). The output of the controller 12 is sent to the circulation pump 20 via the signal line 12a.

As a result of these operations, NH
When 4out + NO3out is equal to or less than TNout *, the controller 9 starts sampling the treated water again. This instruction is transmitted to the pump 81 through the signal line 9d, the pump 82 through the signal line 9e, the pump 83 through the signal line 9f, and the pump 84 through the signal line 9g.

By the above operation, the nitrogen concentration of the treated water is normally measured as monitoring data, but when it exceeds the target value, the concentration of nitrate nitrogen in the anaerobic tank and the ammonia nitrogen in the aerobic tank are measured. Since the former can be used for adjusting the circulation amount and the latter for adjusting the air supply amount, one set of nitrate nitrogen concentration meter and ammonia nitrogen concentration meter can be efficiently used for monitoring and control. can do.

Embodiment 7 Another embodiment according to claims 1 and 2 of the present invention will be described with reference to the drawings. FIG. 7 is a block diagram showing a supervisory control device for a biological water treatment process according to the seventh embodiment.

A tank 30 stores a chemical for promoting denitrification, for example, methanol. Reference numeral 31 is a pump for adding a medicine, which is connected to the tank 30 through a pipe 30a. The pump 31 is also connected to the controller 12 via the signal line 12a. Reference numeral 31a is a pipe for adding a drug to the anaerobic tank and is connected to the pump 31. Others are the same as in FIG.

The operation is almost the same as that of the fifth embodiment,
Only the operation of the controller 12 is different. The controller 12 measures the measured value N
The flow rate Q31 of the chemical addition pump 31 is adjusted according to the deviation between O3ana and the predetermined target value NO3ana *. This calculation is performed, for example, according to the equation (5). The target value NO3ana * is transmitted from the setter 92 via the signal line 92a.

[0103]     Q31 = K5 (NO3ana-NO3ana *) (5) here K5: constant

By the above operation, the organic substances necessary for the denitrification reaction can be replenished without excess or deficiency.

Even with such a device configuration and operation, the same effect as that of the fifth embodiment can be obtained.

Embodiment 8 Another embodiment according to claims 1 and 2 of the present invention will be described with reference to the drawings. FIG. 8 is a block diagram showing a supervisory control device for a biological water treatment process according to the eighth embodiment.

A tank 30 stores a chemical for promoting denitrification, for example, methanol. Reference numeral 31 is a pump for adding a medicine, which is connected to the tank 30 through a pipe 30a. The pump 31 is also connected to the controller 12 via the signal line 12a. Reference numeral 31a is a pipe for adding a drug to the anaerobic tank and is connected to the pump 31. Others are the same as in FIG.

The operation is almost the same as that of the sixth embodiment,
Only the operation of the controller 12 is different. The controller 12 measures the measured value N
The flow rate Q31 of the chemical addition pump 31 is adjusted according to the deviation between O3ana and the predetermined target value NO3ana *. This calculation is performed, for example, according to the equation (5). The target value NO3ana * is set by the setter 92 via the signal line 92a.
More transmitted. This makes it possible to replenish the organic substances necessary for the denitrification reaction without excess or deficiency.

Even with such a device configuration and operation, the same effect as that of the sixth embodiment can be obtained.

Embodiment 9 Embodiments according to claims 1 and 2 of the present invention will be described with reference to the drawings. FIG. 9 is a configuration diagram showing a monitoring control device for a biological water treatment process according to the ninth embodiment.

Reference numeral 50 is a tank for storing the coagulant. Reference numeral 51 denotes a pump for adding the coagulant to the aerobic tank 2, which is connected to the tank 50 via the pipe 50a. The pump 51 is also connected to the controller 13 via the signal line 13a. The controller 13 is connected to the controller 9 via a signal line 9d. Reference numeral 130 denotes a setting device for setting a target value of the phosphorus concentration of the treated water, which is connected to the controller 13 via the signal line 130a.

Reference numeral 51a is a pipe for adding the coagulant to the aerobic tank 2, and is connected to the pump 51. Others are the same as in FIG.

Next, the operation will be described.

The operation is almost the same as in the first embodiment,
Only the operations of the controller 9 and the controller 13 are slightly different. The controller 9 adjusts the flow rate of the returning sludge pump 5 according to the phosphorus concentration Pana of the anaerobic tank 1, but if Pana does not reach the predetermined target value Pana0 even after a certain period of time, sampling of the anaerobic tank 1 is performed. Then, sampling of the treated water is started again. This instruction is transmitted to the valve 7 via the signal line 9c.

The test water is sent to the phosphorus concentration meter 6 through the pipe c, the pipe 7b, the valve 7, the pipe 7c, the pump 8 and the pipe 8a. The measured value of the phosphorus densitometer 6 is sent to the controller 9 via the signal line 6a. The controller 9 again compares the measured value of the phosphorus concentration meter 6 (here, the phosphorus concentration Pout in the treated water) with a predetermined target value Pout *. The target value Pout * of the treated water phosphorus concentration is transmitted from the setter 90 via the signal line 90a. The setting device 90 and the setting device 130 may be the same.

When Pout is larger than Pout *,
The controller 9 directs addition of a flocculant. This instruction and Pout are transmitted to the controller 13 via the signal line 9d. The controller 13 uses, for example, the pump 5 according to the following equation.
The flow rate Q51 of 1 is calculated. The target value Pout * is transmitted from the setter 130 via the signal line 130a.

[0117] Q51 = K6 (Pout-Pout *) (6) here K6: constant

As a result, the treated water phosphorus concentration Pout can be reduced to the target value Pout *. As a result, when Pout is equal to or less than Pout0 for a certain period of time, the addition of the coagulant is stopped. This instruction is sent to the controller 13 via the signal line 9d. Sampling will continue from the treated water and the quality of the treated water will continue to be monitored.

By the above operation, in addition to the effect of the first embodiment, there is an effect that phosphorus in the sewage can be reduced more reliably.

Embodiment 10 Embodiments according to claims 1 and 2 of the present invention will be described with reference to the drawings. FIG. 10 is a configuration diagram showing a supervisory control device for a biological water treatment process according to the tenth embodiment.

50 is a tank for storing the coagulant. Reference numeral 51 denotes a pump for adding the coagulant to the aerobic tank 2, which is connected to the tank 50 via the pipe 50a. The pump 51 is also connected to the controller 13 via the signal line 13a. The controller 13 is connected to the controller 9 via a signal line 9e. Reference numeral 130 denotes a setting device for setting a target value of the phosphorus concentration of the treated water, which is connected to the controller 13 via the signal line 130a.

Reference numeral 51a is a pipe for adding the aggregating agent to the aerobic tank 2 and is connected to the pump 51. Others are the same as in FIG.

Next, the operation will be described.

The operation is almost the same as that of the second embodiment,
Only the operations of the controller 9 and the controller 13 are slightly different. The controller 9 adjusts the flow rate of the returning sludge pump 5 according to the phosphorus concentration Pana of the anaerobic tank 1, but if Pana does not reach the predetermined target value Pana0 even after a certain period of time, sampling of the anaerobic tank 1 is performed. Then, sampling of the treated water is started again. This instruction is transmitted to the pump 81 via the signal line 9c and to the pump 82 via the signal line 9d.

The test water is pipe c, pipe 82a, pump 8
2, sent to the phosphorus concentration meter 6 via the pipe 82b. The measured value of the phosphorus concentration meter 6 is sent to the controller 9 via the signal line 6a.
Sent to. The controller 9 again compares the measured value of the phosphorus concentration meter 6 (here, the phosphorus concentration Pout in the treated water) with a predetermined target value Pout *. The target value Pout * of the treated water phosphorus concentration is transmitted from the setter 90 via the signal line 90a. The setting device 90 and the setting device 130 may be the same.

When Pout is larger than Pout *,
The controller 9 directs addition of a flocculant. This instruction and Pout are transmitted to the controller 13 via the signal line 9e. The controller 13 calculates the flow rate Q51 of the pump 51, for example, according to the equation (6). As a result, the phosphorus concentration Pout of the treated water can be reduced to the target value Pout *. As a result, Pout is Pou for a certain period of time.
If it is equal to or below t0, stop adding coagulant. This instruction is sent via the signal line 9e to the controller 13
Sent to. Sampling will continue from the treated water and the quality of the treated water will continue to be monitored.

By the above operation, in addition to the effect of the second embodiment, there is an effect that phosphorus in the sewage can be reduced more reliably.

Embodiment 11 Embodiments according to claims 1 and 2 of the present invention will be described with reference to the drawings. FIG. 11 is a block diagram showing a monitoring control device of a biological water treatment process according to the eleventh embodiment.

50 is a tank for storing the coagulant. Reference numeral 51 denotes a pump for adding the coagulant to the aerobic tank 2, which is connected to the tank 50 via the pipe 50a. The pump 51 is also connected to the controller 13 via the signal line 13a. The controller 13 is connected to the on-roller 9 via a signal line 9d. Reference numeral 130 denotes a setting device for setting a target value of the phosphorus concentration of the treated water, which is connected to the controller 13 via the signal line 130a.

Reference numeral 51a is a pipe for adding the coagulant to the aerobic tank 2 and is connected to the pump 51. Others are the same as in FIG.

Next, the operation will be described.

The operation is almost the same as that of the third embodiment,
Only the operations of the controller 9 and the controller 13 are slightly different. The controller 9 adjusts the flow rate of the chemical addition pump 41 according to the phosphorus concentration Pana of the anaerobic tank 1, but the target value Pana0 that Pana sets in advance after a certain period has passed.
If it does not reach, the sampling of the anaerobic tank 1 is stopped and the sampling of the treated water is started again. This instruction is transmitted to the valve 7 via the signal line 9c.

The test water is sent to the phosphorus concentration meter 6 through the pipe c, the pipe 7b, the valve 7, the pipe 7c, the pump 8 and the pipe 8a. The measured value of the phosphorus densitometer 6 is sent to the controller 9 via the signal line 6a. The controller 9 again compares the measured value of the phosphorus concentration meter 6 (here, the phosphorus concentration Pout in the treated water) with a predetermined target value Pout *. The target value Pout * of the treated water phosphorus concentration is transmitted from the setter 90 via the signal line 90a. The setting device 90 and the setting device 130 may be the same.

When Pout is larger than Pout *,
The controller 9 directs addition of a flocculant. This instruction and Pout are transmitted to the controller 13 via the signal line 9d. The controller 13 calculates the flow rate Q51 of the pump 51, for example, according to the equation (6). As a result, the phosphorus concentration Pout of the treated water can be reduced to the target value Pout *. As a result, Pout is Pou for a certain period of time.
If it is equal to or below t0, stop adding coagulant. This instruction is given via the signal line 9d to the controller 13
Sent to. Sampling will continue from the treated water and the quality of the treated water will continue to be monitored.

By the above operation, in addition to the effect of the third embodiment, there is an effect that phosphorus in the sewage can be reduced more reliably.

Embodiment 12 Embodiments according to claims 1 and 2 of the present invention will be described with reference to the drawings. FIG. 12 is a configuration diagram showing a supervisory control device for a biological water treatment process according to the twelfth embodiment.

50 is a tank for storing the coagulant. Reference numeral 51 denotes a pump for adding the coagulant to the aerobic tank 2, which is connected to the tank 50 via the pipe 50a. The pump 51 is also connected to the controller 13 via the signal line 13a. The controller 13 is connected to the controller 9 via a signal line 9e. Reference numeral 130 denotes a setting device for setting a target value of the phosphorus concentration of the treated water, which is connected to the controller 13 via the signal line 130a.

Reference numeral 51a is a pipe for adding the coagulant to the aerobic tank 2, and is connected to the pump 51. Others are the same as in FIG.

Next, the operation will be described.

The operation is almost the same as that of the fourth embodiment,
Only the operations of the controller 9 and the controller 13 are slightly different. The controller 9 adjusts the flow rate of the chemical addition pump 41 according to the phosphorus concentration Pana of the anaerobic tank 1, but the target value Pana0 that Pana sets in advance after a certain period has passed.
If it does not reach, the sampling of the anaerobic tank 1 is stopped and the sampling of the treated water is started again. This instruction is transmitted to the pump 81 via the signal line 9c and to the pump 82 via the signal line 9d.

The test water is pipe c, pipe 82a, pump 8
2, sent to the phosphorus concentration meter 6 via the pipe 82b. The measured value of the phosphorus concentration meter 6 is sent to the controller 9 via the signal line 6a.
Sent to. The controller 9 again compares the measured value of the phosphorus concentration meter 6 (here, the phosphorus concentration Pout in the treated water) with a predetermined target value Pout *. The target value Pout * of the treated water phosphorus concentration is transmitted from the setter 90 via the signal line 90a. The setting device 90 and the setting device 130 may be the same.

When Pout is larger than Pout *,
The controller 9 directs addition of a flocculant. This instruction and Pout are transmitted to the controller 13 via the signal line 9e. The controller 13 calculates the flow rate Q51 of the pump 51, for example, according to the equation (6). As a result, the phosphorus concentration Pout of the treated water can be reduced to the target value Pout *. As a result, Pout is Pou for a certain period of time.
If it is equal to or below t0, stop adding coagulant. This instruction is given via the signal line 9d to the controller 13
Sent to. Sampling will continue from the treated water and the quality of the treated water will continue to be monitored.

By the above operation, in addition to the effect of the fourth embodiment, there is an effect that phosphorus in the sewage can be reduced more reliably.

Embodiment 13 An embodiment according to claims 1 and 3 of the present invention will be described with reference to the drawings. FIG. 13 is a block diagram showing a supervisory control device for a biological water treatment process according to the thirteenth embodiment.

Reference numeral 900 denotes a timer, which is connected to the controller 9 via a signal line 900a. Others are Figure 1
Is the same as.

Next, the operation will be described.

The timer 900 defines a time T1 for continuing sampling from the treated water and a time T2 for continuing sampling from the anaerobic tank 1. That is, the phosphorus concentration Pout in the treated water is measured for T1 time after the timer is started. Pout is stored in the memory circuit 10. These operations are the same as those in the first embodiment.

After the lapse of T1 time, the phosphorus concentration Pana in the anaerobic tank 1 is measured for the next T2 time. Pana is used for calculation for adjusting the amount of returned sludge. These operations are similar to those in the first embodiment.

After the lapse of T2, the calculation of the phosphorus concentration Pout in the treated water is continued for the next T1.

By the above operation, the phosphorus concentration of the treated water is measured as monitoring data during the time when the inflow load is low, but is switched to the measurement of the anaerobic tank phosphorus concentration during the time when the load is high, and the amount of sludge to be returned is adjusted. Therefore, one phosphorus concentration meter can be efficiently used for monitoring and control.

Fourteenth Embodiment Another embodiment according to claims 1 and 3 of the present invention will be described with reference to the drawings. FIG. 14 is a block diagram showing a supervisory control device for a biological water treatment process according to the fourteenth embodiment.

Reference numeral 900 denotes a timer, which is connected to the controller 9 via a signal line 900a. Others are Figure 2
Is the same as.

Next, the operation will be described.

The timer 900 defines a time T1 for continuing the sampling from the treated water and a time T2 for continuing the sampling from the anaerobic tank 1. That is, the phosphorus concentration Pout in the treated water is measured for T1 time after the timer is started. Pout is stored in the memory circuit 10. These operations are the same as those in the second embodiment.

After the lapse of T1 time, the phosphorus concentration Pana in the anaerobic tank 1 is measured for the next T2 time. Pana is used for calculation for adjusting the amount of returned sludge. These operations are similar to those in the second embodiment.

After the lapse of T2, the calculation of the phosphorus concentration Pout in the treated water is continued for the next T1.

By the above operation, the phosphorus concentration of the treated water is measured as monitoring data during the time when the inflow load is low, but is switched to the measurement of the anaerobic tank phosphorus concentration during the time when the load is high, and the amount of sludge to be returned is adjusted. Therefore, one phosphorus concentration meter can be efficiently used for monitoring and control.

Fifteenth Embodiment Another embodiment according to claims 1 and 3 of the present invention will be described with reference to the drawings. FIG. 15 is a block diagram showing a supervisory control device for a biological water treatment process according to the fifteenth embodiment.

Reference numeral 900 is a timer, which is connected to the controller 9 via a signal line 900a. Others are Figure 3
Is the same as.

Next, the operation will be described.

The timer 900 defines a time T1 for continuing sampling from the treated water and a time T2 for continuing sampling from the anaerobic tank 1. That is, the phosphorus concentration Pout in the treated water is measured for T1 time after the timer is started. Pout is stored in the memory circuit 10. These operations are similar to those of the third embodiment.

After the lapse of T1 time, the phosphorus concentration Pana in the anaerobic tank 1 is measured for the next T2 time. Pana is used for calculation for adjusting the amount of drug added. These operations are similar to those in the third embodiment.

After the lapse of T2 time, for the next T1 time, the calculation of the phosphorus concentration Pout in the treated water is continued again.

By the above operation, the phosphorus concentration of the treated water is measured as monitoring data during the time when the inflow load is low, but is switched to the measurement of the anaerobic tank phosphorus concentration during the time when the load is high, and the amount of chemical addition is adjusted. Therefore, one phosphorus concentration meter can be efficiently used for monitoring and control.

Sixteenth Embodiment Another embodiment according to claims 1 and 3 of the present invention will be described with reference to the drawings. FIG. 16 is a block diagram showing a supervisory control device for a biological water treatment process according to the sixteenth embodiment.

Reference numeral 900 is a timer, which is connected to the controller 9 via a signal line 900a. Others are Figure 4
Is the same as.

Next, the operation will be described.

The timer 900 defines a time T1 for continuing the sampling from the treated water and a time T2 for continuing the sampling from the anaerobic tank 1. That is, the phosphorus concentration Pout in the treated water is measured for T1 time after the timer is started. Pout is stored in the memory circuit 10. These operations are similar to those in the fourth embodiment.

After the lapse of T1 time, the phosphorus concentration Pana in the anaerobic tank 1 is measured for the next T2 time. Pana is used for calculation for adjusting the amount of drug added. These operations are similar to those in the fourth embodiment.

After the lapse of T2 time, the calculation of the phosphorus concentration Pout in the treated water is continued again for the next T1 time.

By the above operation, the treated water phosphorus concentration is measured as monitoring data during the low inflow load time, but is switched to the anaerobic tank phosphorus concentration during the high load time to adjust the amount of chemical addition. Therefore, one phosphorus concentration meter can be efficiently used for monitoring and control.

Embodiment 17 Another embodiment according to claims 1 and 3 of the present invention will be described with reference to the drawings. FIG. 17 is a block diagram showing a supervisory control device for a biological water treatment process according to the seventeenth embodiment.

Reference numeral 900 is a timer, which is connected to the controller 9 via a signal line 900a. Others are Figure 5
Is the same as.

Next, the operation will be described.

The timer 900 defines the time T1 for continuing sampling from the treated water and the time T2 for continuing sampling from the anaerobic tank 1. That is, the ammonia nitrogen concentration N in the treated water is N1 after the timer starts.
H4out and nitrate nitrogen concentration NO3out are measured. NH4out and NO3out are memory circuits 1
Stored at 0. These operations are similar to those in the fifth embodiment.

After the lapse of T1 time, during the next T2 time, the nitrate nitrogen concentration NO3ana in the anaerobic tank 1 and the ammonia nitrogen concentration NH4aer in the aerobic tank 1 are measured. NO
3ana is used for calculation for adjusting the circulation amount. Further, NH4aer is used for calculation for adjusting the air supply amount. These operations are similar to those in the fifth embodiment.

After the lapse of T2 time, in the next T1 time, the calculation of the ammonia nitrogen concentration NH4out and the nitrate nitrogen concentration NO3out in the treated water is continued again.

By the above operation, the treated water nitrogen concentration is measured as monitoring data during the time when the inflow load is low, but the nitrate nitrogen concentration in the anaerobic tank and the ammonia gas in the aerobic tank are measured during the time when the load is high. Since the former can be used to adjust the circulation amount and the latter can be used to adjust the air supply amount, it is possible to efficiently monitor and control one set of nitrate nitrogen concentration meter and ammonia nitrogen concentration meter. It can be operated.

Eighteenth Embodiment Another embodiment according to claims 1 and 3 of the present invention will be described with reference to the drawings. FIG. 18 is a block diagram showing a supervisory control device for a biological water treatment process according to the eighteenth embodiment.

Reference numeral 900 denotes a timer, which is connected to the controller 9 via a signal line 900a. Others are shown in Figure 6.
Is the same as.

Next, the operation will be described.

The timer 900 defines a time T1 for continuing the sampling from the treated water and a time T2 for continuing the sampling from the anaerobic tank 1. That is, the ammonia nitrogen concentration N in the treated water is N1 after the timer starts.
H4out and nitrate nitrogen concentration NO3out are measured. NH4out and NO3out are memory circuits 1
Stored at 0. These operations are similar to those in the sixth embodiment.

After the lapse of T1 time, in the next T2 time, the nitrate nitrogen concentration NO3ana in the anaerobic tank 1 and the ammonia nitrogen concentration NH4aer in the aerobic tank 1 are measured. NO
3ana is used for calculation for adjusting the circulation amount. Further, NH4aer is used for calculation for adjusting the air supply amount. These operations are similar to those of the sixth embodiment.

After the lapse of T2 time, for the next T1 time, the calculation of the ammonia nitrogen concentration NH4out and the nitrate nitrogen concentration NO3out in the treated water is continued again.

By the above operation, the treated water nitrogen concentration is measured as monitoring data during the time when the inflow load is low, but the nitrate nitrogen concentration in the anaerobic tank and the ammonia gas in the aerobic tank are measured during the time when the load is high. Since the former can be used to adjust the circulation amount and the latter can be used to adjust the air supply amount, it is possible to efficiently monitor and control one set of nitrate nitrogen concentration meter and ammonia nitrogen concentration meter. It can be operated.

Embodiment 19 Another embodiment according to claims 1 and 3 of the present invention will be described with reference to the drawings. FIG. 19 is a block diagram showing a supervisory control device for a biological water treatment process according to the nineteenth embodiment.

Reference numeral 900 is a timer, which is connected to the controller 9 via a signal line 900a. Others are shown in Figure 7.
Is the same as.

Next, the operation will be described.

The timer 900 defines a time T1 for continuing the sampling from the treated water and a time T2 for continuing the sampling from the anaerobic tank 1. That is, the ammonia nitrogen concentration N in the treated water is N1 after the timer starts.
H4out and nitrate nitrogen concentration NO3out are measured. NH4out and NO3out are memory circuits 1
Stored at 0. These operations are similar to those of the seventh embodiment.

After the lapse of T1 time, in the next T2 time, the nitrate nitrogen concentration NO3ana in the anaerobic tank 1 and the ammonia nitrogen concentration NH4aer in the aerobic tank 1 are measured. NO
3ana is used for calculation for adjusting the drug addition amount.
Further, NH4aer is used for calculation for adjusting the air supply amount. These operations are similar to those in the seventh embodiment.

After the lapse of T2 time, in the next T1 time, the calculation of the ammonia nitrogen concentration NH4out and the nitrate nitrogen concentration NO3out in the treated water is continued again.

By the above operation, the treated water nitrogen concentration is measured as monitoring data during the low inflow load time, but during the high load time, the nitrate nitrogen concentration in the anaerobic tank and the ammoniacal gas in the aerobic tank are measured. Since the former can be used to adjust the amount of chemicals added and the latter to adjust the amount of air supplied, it is possible to monitor and control one set of nitrate nitrogen concentration meter and ammonia nitrogen concentration meter. Can operate well.

Twentyth Embodiment Another embodiment according to claims 1 and 3 of the present invention will be described with reference to the drawings. FIG. 20 is a configuration diagram showing a monitoring control device for a biological water treatment process according to the twentieth embodiment.

Reference numeral 900 is a timer, which is connected to the controller 9 via a signal line 900a. Others are shown in Figure 7.
Is the same as.

Next, the operation will be described.

The timer 900 defines a time T1 for continuing the sampling from the treated water and a time T2 for continuing the sampling from the anaerobic tank 1. That is, the ammonia nitrogen concentration N in the treated water is N1 after the timer starts.
H4out and nitrate nitrogen concentration NO3out are measured. NH4out and NO3out are memory circuits 1
Stored at 0. These operations are similar to those of the eighth embodiment.

After the lapse of T1 time, in the next T2 time, the nitrate nitrogen concentration NO3ana in the anaerobic tank 1 and the ammonia nitrogen concentration NH4aer in the aerobic tank 1 are measured. NO
3ana is used for calculation for adjusting the drug addition amount.
Further, NH4aer is used for calculation for adjusting the air supply amount. These operations are similar to those in the eighth embodiment.

After the lapse of T2 time, for the next T1 time, the calculation of the ammonia nitrogen concentration NH4out and the nitrate nitrogen concentration NO3out in the treated water is continued again.

By the above operation, the treated water nitrogen concentration is measured as monitoring data during the time when the inflow load is low, but during the time when the inflow load is high, the nitrate nitrogen concentration in the anaerobic tank and the ammoniacal gas in the aerobic tank are measured. Since the former can be used to adjust the amount of chemicals added and the latter to adjust the amount of air supplied, it is possible to monitor and control one set of nitrate nitrogen concentration meter and ammonia nitrogen concentration meter. Can operate well.

Embodiment 21 An embodiment according to claims 1 and 4 of the present invention will be described with reference to the drawings. FIG. 21 is a block diagram showing a monitoring control device of a biological water treatment process according to the twenty-first embodiment.

A flow meter 62 is attached to the pipe a. The measurement value of the flow meter is a condition given from outside the system to the target process. Further, it is connected to the controller 9 via the signal line 62a. Reference numeral 90 is a setter for determining the reference value of the inflow flow rate, and is a signal line 90a.
Is connected to the controller 9 via. Others are the same as in FIG.

Next, the operation will be described.

The flow rate of the sewage flowing into the anaerobic tank 1 through the pipe a is measured by the flow meter 62. Measured value is signal line 62
It is sent to the controller 9 via a. When the flow rate is smaller than the reference value, the phosphorus concentration Pout in the treated water is measured (the reference value is sent from the setter 90 via the signal line 90a). Pout is stored in the memory circuit 10. These operations are the same as those in the first embodiment.

On the contrary, when the flow rate is larger than the reference value, the phosphorus concentration Pana in the anaerobic tank 1 is measured. Pana is used for calculation for adjusting the amount of returned sludge. These operations are similar to those in the first embodiment.

According to the above operation, when the inflow load is low, the treated water phosphorus concentration is measured as monitoring data, but when the load is high, the anaerobic tank phosphorus concentration is switched to be used for adjusting the amount of returned sludge. Therefore, one phosphorus concentration meter can be efficiently used for monitoring and control.

Embodiment 22 Embodiments according to claims 1 and 4 of the present invention will be described with reference to the drawings. 22 is a block diagram showing a supervisory control device for a biological water treatment process according to a twenty-second embodiment.

A flow meter 62 is attached to the pipe a. In addition, the controller 9 is connected via the signal line 62a.
Connected with. Reference numeral 90 denotes a setting device for determining the reference value of the inflow flow rate, which is connected to the controller 9 via the signal line 90a. Others are the same as in FIG.

Next, the operation will be described.

The flow rate of the sewage flowing into the anaerobic tank 1 through the pipe a is measured by the flow meter 62. Measured value is signal line 62
It is sent to the controller 9 via a. When the flow rate is smaller than the reference value, the phosphorus concentration Pout in the treated water is measured (the reference value is sent from the setter 90 via the signal line 90a). Pout is stored in the memory circuit 10. These operations are the same as those in the second embodiment.

On the contrary, when the flow rate is larger than the reference value, the phosphorus concentration Pana in the anaerobic tank 1 is measured. Pana is used for calculation for adjusting the amount of returned sludge. These operations are similar to those in the second embodiment.

By the above operation, when the inflow load is low, the treated water phosphorus concentration is measured as the monitoring data, but when the load is high, the anaerobic tank phosphorus concentration is switched to be used for adjusting the amount of returned sludge. Therefore, one phosphorus concentration meter can be efficiently used for monitoring and control.

[Embodiment 23] Embodiments according to claims 1 and 4 of the present invention will be described with reference to the drawings. FIG. 23 is a block diagram showing a supervisory control device of a biological water treatment process according to the 23rd embodiment.

A flow meter 62 is attached to the pipe a. In addition, the controller 9 is connected via the signal line 62a.
Connected with. Reference numeral 90 denotes a setting device for determining the reference value of the inflow flow rate, which is connected to the controller 9 via the signal line 90a. Others are the same as in FIG.

Next, the operation will be described.

The flow rate of sewage flowing into the anaerobic tank 1 through the pipe a is measured by the flow meter 62. Measured value is signal line 62
It is sent to the controller 9 via a. When the flow rate is smaller than the reference value, the phosphorus concentration Pout in the treated water is measured (the reference value is sent from the setter 90 via the signal line 90a). Pout is stored in the memory circuit 10. These operations are similar to those of the third embodiment.

On the contrary, when the flow rate is larger than the reference value, the phosphorus concentration Pana in the anaerobic tank 1 is measured. Pana is used for calculation for adjusting the amount of drug added. These operations are similar to those in the third embodiment.

By the above operation, when the inflow load is low, the treated water phosphorus concentration is measured as the monitoring data, but when the load is high, the anaerobic tank phosphorus concentration is switched to be used for adjusting the amount of returned sludge. Therefore, one phosphorus concentration meter can be efficiently used for monitoring and control.

Embodiment 24 Embodiments according to claims 1 and 4 of the present invention will be described with reference to the drawings. FIG. 24 is a block diagram showing a monitoring control device of a biological water treatment process according to the 24th embodiment.

A flow meter 62 is attached to the pipe a. In addition, the controller 9 is connected via the signal line 62a.
Connected with. Reference numeral 90 denotes a setting device for determining the reference value of the inflow flow rate, which is connected to the controller 9 via the signal line 90a. Others are the same as in FIG.

Next, the operation will be described.

The flow rate of the sewage flowing into the anaerobic tank 1 through the pipe a is measured by the flow meter 62. Measured value is signal line 62
It is sent to the controller 9 via a. When the flow rate is smaller than the reference value, the phosphorus concentration Pout in the treated water is measured (the reference value is sent from the setter 90 via the signal line 90a). Pout is stored in the memory circuit 10. These operations are similar to those in the fourth embodiment.

On the contrary, when the flow rate is larger than the reference value, the phosphorus concentration Pana in the anaerobic tank 1 is measured. Pana is used for calculation for adjusting the amount of drug added. These operations are similar to those in the fourth embodiment.

According to the above operation, when the inflow load is low, the treated water phosphorus concentration is measured as monitoring data, but when the load is high, the anaerobic tank phosphorus concentration is switched to be used for adjusting the amount of returned sludge. Therefore, one phosphorus concentration meter can be efficiently used for monitoring and control.

[Embodiment 25] Embodiments according to claims 1 and 4 of the present invention will be described with reference to the drawings. FIG. 25 is a block diagram showing a supervisory control device for a biological water treatment process according to the 25th embodiment.

A flow meter 62 is attached to the pipe a. In addition, the controller 9 is connected via the signal line 62a.
Connected with. Reference numeral 90 denotes a setting device for determining the reference value of the inflow flow rate, which is connected to the controller 9 via the signal line 90a. Others are the same as in FIG.

Next, the operation will be described.

The flow rate of the sewage flowing into the anaerobic tank 1 through the pipe a is measured by the flow meter 62. Measured value is signal line 62
It is sent to the controller 9 via a. When the flow rate is smaller than the reference value, the ammonia nitrogen concentration N in the treated water
H4out and nitrate nitrogen concentration NO3out are measured. (The reference value is sent from the setter 90 via the signal line 90a). NH4out and NO3out are stored in the memory circuit 10. These operations are similar to those in the fifth embodiment.

On the contrary, when the flow rate is larger than the reference value, the nitrate nitrogen concentration NO3ana in the anaerobic tank 1 and the ammonia nitrogen concentration NH4aer in the aerobic tank 1 are measured.
NO3ana is used for calculation for adjusting the circulation amount.
Further, NH4aer is used for calculation for adjusting the air supply amount. These operations are similar to those in the fifth embodiment.

According to the above operation, when the inflow load is low, the treated water nitrogen concentration is measured as monitoring data, but when the load is high, the nitrate nitrogen concentration in the anaerobic tank and the ammonia nitrogen concentration in the aerobic tank are measured. Since the former can be used for adjusting the circulation amount and the latter for adjusting the air supply amount, one set of nitrate nitrogen concentration meter and ammonia nitrogen concentration meter can be efficiently used for monitoring and control. be able to.

Embodiment 26 Embodiments according to claims 1 and 4 of the present invention will be described with reference to the drawings. FIG. 26 is a block diagram showing a supervisory control device for biological water treatment process according to the twenty-sixth embodiment.

A flow meter 62 is attached to the pipe a. In addition, the controller 9 is connected via the signal line 62a.
Connected with. Reference numeral 90 denotes a setting device for determining the reference value of the inflow flow rate, which is connected to the controller 9 via the signal line 90a. Others are the same as in FIG.

Next, the operation will be described.

The flow rate of the sewage flowing into the anaerobic tank 1 through the pipe a is measured by the flow meter 62. Measured value is signal line 62
It is sent to the controller 9 via a. When the flow rate is smaller than the reference value, the ammonia nitrogen concentration N in the treated water
H4out and nitrate nitrogen concentration NO3out are measured. (The reference value is sent from the setter 90 via the signal line 90a). NH4out and NO3out are stored in the memory circuit 10. These operations are similar to those in the sixth embodiment.

On the contrary, when the flow rate is larger than the reference value, the nitrate nitrogen concentration NO3ana in the anaerobic tank 1 and the ammonia nitrogen concentration NH4aer in the aerobic tank 1 are measured.
NO3ana is used for calculation for adjusting the circulation amount.
Further, NH4aer is used for calculation for adjusting the air supply amount. These operations are similar to those of the sixth embodiment.

With the above operation, when the inflow load is low, the treated water nitrogen concentration is measured as monitoring data, but when the load is high, the nitrate nitrogen concentration in the anaerobic tank and the ammonia nitrogen concentration in the aerobic tank are measured. Since the former can be used for adjusting the circulation amount and the latter for adjusting the air supply amount, one set of nitrate nitrogen concentration meter and ammonia nitrogen concentration meter can be efficiently used for monitoring and control. be able to.

Embodiment 27 Embodiments according to claims 1 and 4 of the present invention will be described with reference to the drawings. 27 is a block diagram showing a supervisory control device for a biological water treatment process according to the 27th embodiment.

A flow meter 62 is attached to the pipe a. In addition, the controller 9 is connected via the signal line 62a.
Connected with. Reference numeral 90 denotes a setting device for determining the reference value of the inflow flow rate, which is connected to the controller 9 via the signal line 90a. Others are the same as in FIG. 7.

Next, the operation will be described.

The flow rate of the sewage flowing into the anaerobic tank 1 through the pipe a is measured by the flow meter 62. Measured value is signal line 62
It is sent to the controller 9 via a. When the flow rate is smaller than the reference value, the ammonia nitrogen concentration N in the treated water
H4out and nitrate nitrogen concentration NO3out are measured. (The reference value is sent from the setter 90 via the signal line 90a). NH4out and NO3out are stored in the memory circuit 10. These operations are similar to those of the seventh embodiment.

On the contrary, when the flow rate is larger than the reference value, the nitrate nitrogen concentration NO3ana in the anaerobic tank 1 and the ammonia nitrogen concentration NH4aer in the aerobic tank 1 are measured.
NO3ana is used for calculation for adjusting the amount of drug added. Further, NH4aer is used for calculation for adjusting the air supply amount. These operations are similar to those in the seventh embodiment.

With the above operation, when the inflow load is low, the treated water nitrogen concentration is measured as monitoring data, but when the load is high, the nitrate nitrogen concentration in the anaerobic tank and the ammonia nitrogen concentration in the aerobic tank are measured. Since the former can be used for adjusting the amount of chemicals added and the latter for adjusting the amount of air supply, one set of nitrate nitrogen concentration meter and ammonia nitrogen concentration meter can be efficiently used for monitoring and control. can do.

Embodiment 28 An embodiment according to claims 1 and 4 of the present invention will be described with reference to the drawings. FIG. 28 is a configuration diagram showing a monitoring control device for a biological water treatment process according to the twenty-eighth embodiment.

A flow meter 62 is attached to the pipe a. In addition, the controller 9 is connected via the signal line 62a.
Connected with. Reference numeral 90 denotes a setting device for determining the reference value of the inflow flow rate, which is connected to the controller 9 via the signal line 90a. Others are the same as in FIG.

Next, the operation will be described.

The flow rate of sewage flowing into the anaerobic tank 1 through the pipe a is measured by the flow meter 62. Measured value is signal line 62
It is sent to the controller 9 via a. When the flow rate is smaller than the reference value, the ammonia nitrogen concentration N in the treated water
H4out and nitrate nitrogen concentration NO3out are measured. (The reference value is sent from the setter 90 via the signal line 90a). NH4out and NO3out are stored in the memory circuit 10. These operations are similar to those of the eighth embodiment.

On the contrary, when the flow rate is larger than the reference value, the nitrate nitrogen concentration NO3ana in the anaerobic tank 1 and the ammonia nitrogen concentration NH4aer in the aerobic tank 1 are measured.
NO3ana is used for calculation for adjusting the amount of drug added. Further, NH4aer is used for calculation for adjusting the air supply amount. These operations are similar to those in the eighth embodiment.

By the above operation, when the inflow load is low, the treated water nitrogen concentration is measured as monitoring data, but when the load is high, the nitrate nitrogen concentration in the anaerobic tank and the ammonia nitrogen concentration in the aerobic tank are measured. Since the former can be used for adjusting the amount of chemicals added and the latter for adjusting the amount of air supply, one set of nitrate nitrogen concentration meter and ammonia nitrogen concentration meter can be efficiently used for monitoring and control. can do.

Embodiment 29 Embodiments according to claims 1 and 4 of the present invention will be described with reference to the drawings. 29 is a block diagram showing a supervisory control device for a biological water treatment process according to the 29th embodiment.

A flow meter 62 is attached to the pipe a. In addition, the controller 9 is connected via the signal line 62a.
Connected with. Reference numerals 90 and 91 are setters for determining the reference value of the inflow flow rate. The former is connected to the controller 9 via the signal line 90a and the latter is connected to the controller 9 via the signal line 91a. Others are the same as in FIG.

Next, the operation will be described.

The flow rate of the sewage flowing into the anaerobic tank 1 through the pipe a is measured by the flow meter 62. Measured value is signal line 62
It is sent to the controller 9 via a. Flow rate is reference value Q
If it is smaller than in1, the phosphorus concentration Pou in the treated water
Measure t. The reference value Qin1 is transmitted from the setter 90 to the controller 9 via the signal line 90a. These operations are similar to those of the ninth embodiment.

Next, when the flow rate is larger than the reference value Qin1, the phosphorus concentration Pana in the anaerobic tank 1 is measured. P
ana is used for calculation for adjusting the amount of returned sludge. These operations are similar to those of the ninth embodiment.

Further, when the flow rate is larger than Qin2 (> Qin1), the treated water phosphorus concentration Pout is measured again. Pout is used to calculate the amount of coagulant added. These operations are similar to those of the ninth embodiment. The reference value Qin2 is transmitted from the setter 91 to the controller 9 via the signal line 91a.

By the above operation, in addition to the effect of the twenty-first embodiment, there is an effect that phosphorus in the sewage can be reduced more reliably.

[Embodiment 30] Embodiments according to claims 1 and 4 of the present invention will be described with reference to the drawings. 30 is a block diagram showing a supervisory control device for a biological water treatment process according to the thirtieth embodiment.

A flow meter 62 is attached to the pipe a. In addition, the controller 9 is connected via the signal line 62a.
Connected with. Reference numerals 90 and 91 are setting devices for determining the reference value of the inflow flow rate, and the former is connected to the controller 9 via the signal line 90a and the latter is connected to the controller 9 via the signal line 91a. Others are the same as in FIG.

Next, the operation will be described.

The flow rate of the sewage flowing into the anaerobic tank 1 through the pipe a is measured by the flow meter 62. Measured value is signal line 62
It is sent to the controller 9 via a. Flow rate is reference value Q
If it is smaller than in1, the phosphorus concentration Pou in the treated water
Measure t. The reference value Qin1 is transmitted from the setter 90 to the controller 9 via the signal line 90a. These operations are similar to those of the tenth embodiment.

Next, when the flow rate is larger than the reference value Qin1, the phosphorus concentration Pana in the anaerobic tank 1 is measured. P
ana is used for calculation for adjusting the amount of returned sludge. These operations are similar to those in the tenth embodiment.

Further, when the flow rate is larger than Qin2 (> Qin1), the treated water phosphorus concentration Pout is measured again. Pout is used to calculate the amount of coagulant added. These operations are similar to those of the ninth embodiment. The reference value Qin2 is transmitted from the setter 91 to the controller 9 via the signal line 91a.

By the above operation, in addition to the effect of the twenty-second embodiment, phosphorus in sewage can be reduced more reliably.

Embodiment 31 An embodiment according to claims 1 and 4 of the present invention will be described with reference to the drawings. FIG. 31 is a configuration diagram showing a monitoring control device of a biological water treatment process according to the thirty-first embodiment.

A flow meter 62 is attached to the pipe a. In addition, the controller 9 is connected via the signal line 62a.
Connected with. Reference numerals 90 and 91 are setters for determining the reference value of the inflow flow rate. The former is connected to the controller 9 via the signal line 90a and the latter is connected to the controller 9 via the signal line 91a. Others are the same as in FIG. 11.

Next, the operation will be described.

The flow rate of the sewage flowing into the anaerobic tank 1 through the pipe a is measured by the flow meter 62. Measured value is signal line 62
It is sent to the controller 9 via a. Flow rate is reference value Q
If it is smaller than in1, the phosphorus concentration Pou in the treated water
Measure t. The reference value Qin1 is transmitted from the setter 90 to the controller 9 via the signal line 90a. These operations are the same as in the eleventh embodiment.

Next, when the flow rate is larger than the reference value Qin1, the phosphorus concentration Pana in the anaerobic tank 1 is measured. P
ana is used for calculation for adjusting the amount of acetic acid added. These operations are similar to those in the eleventh embodiment.

Further, when the flow rate is larger than Qin2 (> Qin1), the treated water phosphorus concentration Pout is measured again. Pout is used to calculate the amount of coagulant added. These operations are similar to those of the ninth embodiment. The reference value Qin2 is transmitted from the setter 91 to the controller 9 via the signal line 91a.

By the above operation, in addition to the effect of the twenty-third embodiment, phosphorus in sewage can be reduced more reliably.

Embodiment 32 An embodiment according to claims 1 and 4 of the present invention will be described with reference to the drawings. FIG. 32 is a block diagram showing a supervisory control device for the biological water treatment process according to the thirty-second embodiment.

A flow meter 62 is attached to the pipe a. In addition, the controller 9 is connected via the signal line 62a.
Connected with. Reference numerals 90 and 91 are setters for determining the reference value of the inflow flow rate. The former is connected to the controller 9 via the signal line 90a and the latter is connected to the controller 9 via the signal line 91a. Others are the same as in FIG.

Next, the operation will be described.

The flow rate of sewage flowing into the anaerobic tank 1 via the pipe a is measured by the flow meter 62. Measured value is signal line 62
It is sent to the controller 9 via a. Flow rate is reference value Q
If it is smaller than in1, the phosphorus concentration Pou in the treated water
Measure t. The reference value Qin1 is transmitted from the setter 90 to the controller 9 via the signal line 90a. These operations are similar to those in the twelfth embodiment.

Next, when the flow rate is larger than the reference value Qin1, the phosphorus concentration Pana in the anaerobic tank 1 is measured. P
ana is used for calculation for adjusting the amount of acetic acid added. These operations are similar to those in the twelfth embodiment.

Further, when the flow rate is larger than Qin2 (> Qin1), the treated water phosphorus concentration Pout is measured again. Pout is used to calculate the amount of coagulant added. These operations are similar to those of the ninth embodiment. The reference value Qin2 is transmitted from the setter 91 to the controller 9 via the signal line 91a.

By the above operation, in addition to the effect of the twenty-fourth embodiment, phosphorus in sewage can be reduced more reliably.

Incidentally, in the above-mentioned Embodiments 21 to 32, the apparatus is constructed so that the flow rate of the sewage flowing into the anaerobic tank 1 is measured and the sampling position is selected using this value.
Even if the apparatus is configured to change the sampling position by using other process data, for example, the concentration of pollutants in the sewage flowing into the anaerobic tank 1, the same effect can be obtained.

Embodiment 33 An embodiment according to claims 1 and 5 of the present invention will be described with reference to the drawings. FIG. 33 is a block diagram showing a supervisory control device for a biological water treatment process according to a thirty-third embodiment.

Reference numeral 6b is a signal line for transmitting an instruction from the controller 9 to the phosphorus densitometer 6. Others are the same as in FIG.

The operation is almost the same as that of the first embodiment,
The following is added to the operation of the controller 9.

The controller 9 changes the phosphorus concentration measurement frequency according to the sampling position. For example, the frequency when the treated water phosphorus concentration is measured as the monitoring data is set to be lower than the frequency when the anaerobic tank phosphorus concentration is measured as the control data. This instruction is transmitted to the phosphorus densitometer 6 via the signal line 6b.

Thus, in addition to the effects of the first embodiment, the phosphorus concentration meter can be operated more efficiently.

Embodiment 34 An embodiment according to claims 1 and 5 of the present invention will be described with reference to the drawings. FIG. 34 is a block diagram showing the monitoring control device of the biological water treatment process according to the 34th embodiment.

Reference numeral 6b is a signal line for transmitting an instruction from the controller 9 to the phosphorus densitometer 6. Others are the same as in FIG.

The operation is almost the same as that of the second embodiment,
The following is added to the operation of the controller 9.

The controller 9 changes the phosphorus concentration measurement frequency according to the sampling position. For example, the frequency when the treated water phosphorus concentration is measured as the monitoring data is set to be lower than the frequency when the anaerobic tank phosphorus concentration is measured as the control data. This instruction is transmitted to the phosphorus densitometer 6 via the signal line 6b.

As a result, in addition to the effects of the second embodiment, the phosphorus concentration meter can be operated more efficiently.

Embodiment 35 An embodiment according to claims 1 and 5 of the present invention will be described with reference to the drawings. FIG. 35 is a block diagram showing a supervisory control device for biological water treatment process according to the thirty-fifth embodiment.

Reference numeral 6b is a signal line for transmitting an instruction from the controller 9 to the phosphorus densitometer 6. Others are the same as in FIG.

The operation is almost the same as that of the third embodiment,
The following is added to the operation of the controller 9.

The controller 9 changes the measurement frequency of the phosphorus concentration according to the sampling position. For example, the frequency when the treated water phosphorus concentration is measured as the monitoring data is set to be lower than the frequency when the anaerobic tank phosphorus concentration is measured as the control data. This instruction is transmitted to the phosphorus densitometer 6 via the signal line 6b.

As a result, in addition to the effects of the third embodiment, the phosphorus concentration meter can be operated more efficiently.

Embodiment 36 An embodiment according to claims 1 and 5 of the present invention will be described with reference to the drawings. FIG. 36 is a configuration diagram showing a monitoring control device for a biological water treatment process according to the 36th embodiment.

Reference numeral 6b is a signal line for transmitting an instruction from the controller 9 to the phosphorus densitometer 6. Others are the same as in FIG.

The operation is almost the same as that of the fourth embodiment,
The following is added to the operation of the controller 9.

The controller 9 changes the phosphorus concentration measurement frequency in accordance with the sampling position. For example, the frequency when the treated water phosphorus concentration is measured as the monitoring data is set to be lower than the frequency when the anaerobic tank phosphorus concentration is measured as the control data. This instruction is transmitted to the phosphorus densitometer 6 via the signal line 6b.

As a result, in addition to the effects of the fourth embodiment, the phosphorus concentration meter can be operated more efficiently.

Embodiment 37 An embodiment according to claims 1 and 5 of the present invention will be described with reference to the drawings. FIG. 37 is a block diagram showing a supervisory control device for a biological water treatment process according to the 37th embodiment.

Reference numeral 60b is a signal line for transmitting an instruction from the controller 9 to the ammonia nitrogen concentration meter 60, and 61b.
Is a signal line for transmitting an instruction from the controller 9 to the nitrate nitrogen concentration meter 61. Others are the same as in FIG.

The operation is almost the same as that of the fifth embodiment,
The following is added to the operation of the controller 9.

The controller 9 changes the measurement frequency of the ammonia nitrogen concentration and the nitrate nitrogen concentration according to the sampling position. For example, the frequency when measuring treated water ammonia concentration and nitrate nitrogen concentration as monitoring data is more frequent than the frequency when measuring aerobic tank ammonia nitrogen concentration and anaerobic tank nitrate nitrogen concentration as control data. Reduce. This instruction is transmitted to the ammonia nitrogen concentration meter 60 via the signal line 60b and to the nitrate nitrogen concentration meter 61 via the signal line 61b.

As a result, in addition to the effect of the fifth embodiment, there is an effect that the ammonia nitrogen concentration meter and the nitrate nitrogen concentration meter can be operated more efficiently.

Embodiment 38 An embodiment according to claims 1 and 5 of the present invention will be described with reference to the drawings. FIG. 38 is a block diagram showing a monitoring control device of a biological water treatment process according to the 38th embodiment.

Reference numeral 60b is a signal line for transmitting an instruction from the controller 9 to the ammonia nitrogen concentration meter 60, and 61b.
Is a signal line for transmitting an instruction from the controller 9 to the nitrate nitrogen concentration meter 61. Others are the same as in FIG.

The operation is almost the same as that of the sixth embodiment,
The following is added to the operation of the controller 9.

The controller 9 changes the measurement frequency of the ammonia nitrogen concentration and the nitrate nitrogen concentration according to the sampling position. For example, the frequency when measuring treated water ammonia concentration and nitrate nitrogen concentration as monitoring data is more frequent than the frequency when measuring aerobic tank ammonia nitrogen concentration and anaerobic tank nitrate nitrogen concentration as control data. Reduce. This instruction is transmitted to the ammonia nitrogen concentration meter 60 via the signal line 60b and to the nitrate nitrogen concentration meter 61 via the signal line 61b.

As a result, in addition to the effect of the sixth embodiment, there is an effect that the ammonia nitrogen concentration meter and the nitrate nitrogen concentration meter can be operated more efficiently.

Embodiment 39 An embodiment according to claims 1 and 5 of the present invention will be described with reference to the drawings. 39 is a block diagram showing a supervisory control device for a biological water treatment process according to a thirty-ninth embodiment.

60b is a signal line for transmitting an instruction from the controller 9 to the ammonia nitrogen concentration meter 60, and 61b.
Is a signal line for transmitting an instruction from the controller 9 to the nitrate nitrogen concentration meter 61. Others are the same as in FIG. 7.

The operation is almost the same as that of the seventh embodiment,
The following is added to the operation of the controller 9.

The controller 9 changes the measurement frequency of the ammonia nitrogen concentration and the nitrate nitrogen concentration according to the sampling position. For example, the frequency when measuring treated water ammonia concentration and nitrate nitrogen concentration as monitoring data is more frequent than the frequency when measuring aerobic tank ammonia nitrogen concentration and anaerobic tank nitrate nitrogen concentration as control data. Reduce. This instruction is transmitted to the ammonia nitrogen concentration meter 60 via the signal line 60b and to the nitrate nitrogen concentration meter 61 via the signal line 61b.

As a result, in addition to the effect of the seventh embodiment, there is an effect that the ammonia nitrogen concentration meter and the nitrate nitrogen concentration meter can be operated more efficiently.

Embodiment 40 An embodiment according to claims 1 and 5 of the present invention will be described with reference to the drawings. 40 is a block diagram showing a supervisory control device for a biological water treatment process according to the 40th embodiment.

Reference numeral 60b is a signal line for transmitting an instruction from the controller 9 to the ammonia nitrogen concentration meter 60, and 61b.
Is a signal line for transmitting an instruction from the controller 9 to the nitrate nitrogen concentration meter 61. Others are the same as in FIG.

The operation is almost the same as that of the eighth embodiment,
The following is added to the operation of the controller 9.

The controller 9 changes the measurement frequency of the ammonia nitrogen concentration and the nitrate nitrogen concentration according to the sampling position. For example, the frequency when measuring treated water ammonia concentration and nitrate nitrogen concentration as monitoring data is more frequent than the frequency when measuring aerobic tank ammonia nitrogen concentration and anaerobic tank nitrate nitrogen concentration as control data. Reduce. This instruction is transmitted to the ammonia nitrogen concentration meter 60 via the signal line 60b and to the nitrate nitrogen concentration meter 61 via the signal line 61b.

As a result, in addition to the effects of the eighth embodiment, the ammonia nitrogen concentration meter and the nitrate nitrogen concentration meter can be operated more efficiently.

Embodiment 41 An embodiment according to claims 1 and 5 of the present invention will be described with reference to the drawings. FIG. 41 is a configuration diagram showing a monitoring control device of a biological water treatment process according to the forty-first embodiment.

6b is a phosphorus concentration meter 6 from the controller 9
It is a signal line for transmitting to. Others are the same as in FIG.

The operation is almost the same as that of the ninth embodiment,
The following is added to the operation of the controller 9.

The controller 9 changes the phosphorus concentration measurement frequency in accordance with the sampling position. For example, the frequency at which the treated water phosphorus concentration is measured as the monitoring data is set lower than the frequency at which the anaerobic tank phosphorus concentration or the treated water phosphorus concentration is measured as the control data. This instruction is transmitted to the phosphorus densitometer 6 via the signal line 6b.

As a result, in addition to the effects of the ninth embodiment, the phosphorus concentration meter can be operated more efficiently.

Embodiment 42 An embodiment according to claims 1 and 5 of the present invention will be described with reference to the drawings. FIG. 42 is a configuration diagram showing a monitoring control device for a biological water treatment process according to the 42nd embodiment.

6b is a phosphorus concentration meter 6 from the controller 9.
It is a signal line for transmitting to. Others are the same as in FIG.

The operation is almost the same as that of the tenth embodiment, but the following is added to the operation of the controller 9.

The controller 9 changes the phosphorus concentration measurement frequency in accordance with the sampling position. For example, the frequency at which the treated water phosphorus concentration is measured as the monitoring data is set lower than the frequency at which the anaerobic tank phosphorus concentration or the treated water phosphorus concentration is measured as the control data. This instruction is transmitted to the phosphorus densitometer 6 via the signal line 6b.

Thus, in addition to the effects of the tenth embodiment, the phosphorus concentration meter can be operated more efficiently.

Embodiment 43 An embodiment according to claims 1 and 5 of the present invention will be described with reference to the drawings. FIG. 43 is a block diagram showing the monitoring control device of the biological water treatment process according to the 43rd embodiment.

6b is a phosphorus concentration meter 6 from the controller 9
It is a signal line for transmitting to. Others are the same as in FIG. 11.

The operation is almost the same as that of the eleventh embodiment, but the following is added to the operation of the controller 9.

The controller 9 changes the phosphorus concentration measurement frequency according to the sampling position. For example, the frequency at which the treated water phosphorus concentration is measured as the monitoring data is set lower than the frequency at which the anaerobic tank phosphorus concentration or the treated water phosphorus concentration is measured as the control data. This instruction is transmitted to the phosphorus densitometer 6 via the signal line 6b.

Thus, in addition to the effects of the eleventh embodiment, the phosphorus concentration meter can be operated more efficiently.

[Embodiment 44] An embodiment according to claims 1 and 5 of the present invention will be described with reference to the drawings. FIG. 44 is a configuration diagram showing a monitoring control device for a biological water treatment process according to the forty-fourth embodiment.

Reference numeral 6b is a phosphorus concentration meter 6 from the controller 9.
It is a signal line for transmitting to. Others are the same as in FIG.

The operation is almost the same as that of the twelfth embodiment, but the following is added to the operation of the controller 9.

The controller 9 changes the phosphorus concentration measurement frequency in accordance with the sampling position. For example, the frequency at which the treated water phosphorus concentration is measured as the monitoring data is set lower than the frequency at which the anaerobic tank phosphorus concentration or the treated water phosphorus concentration is measured as the control data. This instruction is transmitted to the phosphorus densitometer 6 via the signal line 6b.

Thus, in addition to the effects of the twelfth embodiment, the phosphorus concentration meter can be operated more efficiently.

In the above-mentioned embodiment, an example of accumulating the monitoring data in the memory circuit 10 is shown, but it is displayed on the CRT.
Even if it is configured to output to a printer or to combine these, the same effect can be obtained.

In the above-mentioned embodiment, the sample of the phosphorus concentration of the treated water is taken from the pipe c, but it may be sampled from the settling tank 4. Further, the same effect can be obtained by sampling from the pipe b or the aerobic tank 2.

Further, in each of the above-mentioned embodiments, the time continuous analog type is used. However, even if the time discontinuous analog type (sample value type) or digital type is used, the same effect as that of the above-described embodiment is obtained. Play.

Further, in each of the above-mentioned embodiments, the control circuit configuration has been shown. However, even if this is programmed and implemented in a computer, the same effect as that of the above-mentioned embodiments can be obtained.

Further, in each of the above-mentioned embodiments, the control circuit is constructed as a closed loop, but it may be constructed as a driving support system for showing the control operation to the operator.

[0342]

As described above, the monitoring control apparatus according to the first aspect of the present invention has the sampling position switching means capable of selecting the sampling position of the measurement object during the water treatment process, and the sampling position switching means having two or more sampling positions. , Pump
It is connected by a pipe via a switching valve and, the switching valve
By switching the two or more sampling positions
An instrument for measuring process data from one of the
Since the process data measured according to the selected sampling position is stored or displayed as the monitoring data or is used as the control data for the calculation of the operation set value, the controller is provided. The measuring instrument can be effectively used for monitoring and control.

Since the supervisory controller according to claim 2 of the present invention is configured to add the function of selecting the sampling position according to the process data and instructing the sampling position switching means to the controller, This has the effect of operating the measuring instrument more efficiently.

Further, in the monitor control apparatus according to claim 3 of the present invention, the controller is provided with the function of selecting the sampling position according to a predetermined time and instructing the sampling position switching means. The effect that the measuring instrument can be operated more efficiently is achieved.

Further, in the monitor control apparatus according to claim 4 of the present invention, the controller is provided with a function of selecting a sampling position according to process data outside the process system and instructing the sampling position switching means. Therefore, there is an effect that the measuring instrument can be operated more efficiently.

Further, in the monitoring control apparatus according to claim 5 of the present invention, the controller is provided with the function of instructing the measurement frequency of the data measuring means in accordance with the selected sampling position. The effect that can be operated more efficiently.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a supervisory control device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a supervisory control device according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram showing a supervisory control device according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram showing a monitoring control device according to a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram showing a supervisory control device according to a fifth embodiment of the present invention.

FIG. 6 is a configuration diagram showing a supervisory control device according to a sixth embodiment of the present invention.

FIG. 7 is a configuration diagram showing a monitoring control device according to a seventh embodiment of the present invention.

FIG. 8 is a configuration diagram showing a supervisory control device according to an eighth embodiment of the present invention.

FIG. 9 is a configuration diagram showing a supervisory control device according to a ninth embodiment of the present invention.

FIG. 10 is a configuration diagram showing a supervisory control device according to a tenth embodiment of the present invention.

FIG. 11 is a configuration diagram showing a monitoring controller according to an eleventh embodiment of the present invention.

FIG. 12 is a configuration diagram showing a supervisory control device according to a twelfth embodiment of the present invention.

FIG. 13 is a configuration diagram showing a supervisory control device according to a thirteenth embodiment of the present invention.

FIG. 14 is a configuration diagram showing a supervisory control device according to a fourteenth embodiment of the present invention.

FIG. 15 is a configuration diagram showing a supervisory control device according to a fifteenth embodiment of the present invention.

FIG. 16 is a configuration diagram showing a supervisory control device according to a sixteenth embodiment of the present invention.

FIG. 17 is a configuration diagram showing a supervisory control device according to a seventeenth embodiment of the present invention.

FIG. 18 is a configuration diagram showing a supervisory control device according to an eighteenth embodiment of the present invention.

FIG. 19 is a configuration diagram showing a supervisory control device according to a nineteenth embodiment of the present invention.

FIG. 20 is a configuration diagram showing a supervisory control device according to a twentieth embodiment of the present invention.

FIG. 21 is a configuration diagram showing a supervisory control device according to Embodiment 21 of the present invention.

FIG. 22 is a configuration diagram showing a supervisory control device according to a twenty-second embodiment of the present invention.

FIG. 23 is a configuration diagram showing a supervisory control device according to a twenty-third embodiment of the present invention.

FIG. 24 is a configuration diagram showing a supervisory control device according to a twenty-fourth embodiment of the present invention.

FIG. 25 is a configuration diagram showing a supervisory control device according to a twenty-fifth embodiment of the present invention.

FIG. 26 is a configuration diagram showing a supervisory control device according to a twenty sixth embodiment of the present invention.

FIG. 27 is a configuration diagram showing a supervisory control device according to a twenty-seventh embodiment of the present invention.

FIG. 28 is a configuration diagram showing a supervisory control device according to a twenty-eighth embodiment of the present invention.

FIG. 29 is a configuration diagram showing a supervisory control device according to a twenty-ninth embodiment of the present invention.

FIG. 30 is a configuration diagram showing a supervisory control device according to a thirtieth embodiment of the present invention.

FIG. 31 is a configuration diagram showing a supervisory control device according to a thirty-first embodiment of the present invention.

FIG. 32 is a configuration diagram showing a supervisory control device according to a thirty-second embodiment of the present invention.

FIG. 33 is a configuration diagram showing a supervisory control device according to a thirty-third embodiment of the present invention.

FIG. 34 is a configuration diagram showing a supervisory control device according to a thirty-fourth embodiment of the present invention.

FIG. 35 is a configuration diagram showing a supervisory control device according to a thirty-fifth embodiment of the present invention.

FIG. 36 is a configuration diagram showing a supervisory control device according to a thirty-sixth embodiment of the present invention.

FIG. 37 is a configuration diagram showing a supervisory control device according to a thirty-seventh embodiment of the present invention.

FIG. 38 is a configuration diagram showing a supervisory control device according to a thirty-eighth embodiment of the present invention.

FIG. 39 is a configuration diagram showing a supervisory control device according to a thirty-ninth embodiment of the present invention.

FIG. 40 is a configuration diagram showing a supervisory control device according to a fortieth embodiment of the present invention.

FIG. 41 is a configuration diagram showing a supervisory control device according to Embodiment 41 of the present invention.

FIG. 42 is a configuration diagram showing a supervisory control device according to Embodiment 42 of the present invention.

FIG. 43 is a configuration diagram showing a monitoring control device according to a forty-third embodiment of the present invention.

FIG. 44 is a configuration diagram showing a supervisory control device according to a forty-fourth embodiment of the present invention.

[Fig. 45] Fig. 45 is a configuration diagram showing a monitor and control device of a conventional biological water treatment device.

[Explanation of symbols]

1 Anaerobic tank, 2 Aerobic tank, 3 Air supply device, 4 Settling tank, 5 Return sludge pump, 6 Phosphorus concentration meter, 7 valves, 8
Pump, 9 controller, 10 memory circuit, 11,
12 controller, 20 circulation pump, 30, 40 drug tank, 31, 41 pump, 60 ammonia nitrogen meter, 61 nitrate nitrogen meter, 62 flow meter, 70 valve, 8
1, 82, 83, 84 pumps, 900 timers.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI // G01N 31/00 G01N 31/00 FG 33/18 33/18 Z (56) Reference JP-A-10-281629 (JP , A) JP-A-6-238412 (JP, A) JP-A-5-264080 (JP, A) JP-A-9-189579 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) G05B 23/00-23/02 G05B 15/00-15/02 G01N 1/00-1/34

Claims (5)

(57) [Claims] 1. A sampling position switching means capable of selecting a sampling position of a measurement target during a water treatment process , a pump and a pump at two or more of the sampling positions.
It is connected by piping through the switching valve, and the switching valve is turned off.
By replacing them, the two or more sampling positions
Determining one from measuring device for measuring process data, whether to use or the process data storage or display as monitoring data in accordance with the selected sampling locations, the calculation of the operation setting value as the control data of Chi And a controller for controlling the water treatment process. 2. The supervisory control device according to claim 1, wherein the controller has a function of selecting a sampling position according to the process data and instructing the sampling position switching means. 3. The supervisory control device according to claim 1, wherein the controller has a function of selecting a sampling position according to a predetermined time and instructing the sampling position switching means. 4. The supervisory control device according to claim 1, wherein the controller is provided with a function of selecting a sampling position according to process data outside the process system and instructing the sampling position switching means. 5. The supervisory control device according to claim 1, wherein the controller is provided with a function of instructing the measurement frequency of the data measuring means in accordance with the selected sampling position.