JP6448192B2 - Industrial wastewater treatment system and treatment method - Google Patents

Description

  The present invention relates to an industrial wastewater treatment system and a treatment method.

  Conventionally, industrial wastewater containing organic substances from various industries has been treated by biological treatment like the standard activated sludge method. This standard activated sludge method is a biological treatment method in which organic wastewater is aerobically biologically treated. Industrial wastewater discharged from various factories is once collected in a buffer tank, and the effluent from this buffer tank is subjected to primary treatment such as oil-water separation treatment and coagulation sedimentation treatment, followed by secondary treatment such as activated sludge treatment. Next processing is performed.

  In this activated sludge treatment, for example, organic matter (phenol, benzene, etc.), nitrogen, phosphorus, etc. in industrial wastewater are biologically treated with activated sludge, which is a diverse microbial population, so as to satisfy the emission standards. In addition, the activated sludge treated water may be reused by improving the water quality of the treated water by a reverse osmosis membrane device (RO device) after membrane treatment or the like.

  In this activated sludge treatment, it is required to always maintain good quality of nitrogen and phosphorus in the treated water flowing into the activated sludge treatment tank. Conventionally, for example, nitrogen in the influent water flowing into the sewage treatment plant At least one of circulation flow rate, return flow rate, aeration air flow rate, carbon source injection rate, surplus sludge flow rate, return water flow rate, and initial sedimentation bypass valve in the sewage treatment plant using the C / N ratio of the component and the organic matter component There is a proposal to control (Patent Document 1).

JP 2003-200190 A

However, the proposal of Patent Document 1 has a problem that it does not contribute to the improvement of the organic matter treatment speed of organisms when the load of organic matter in the treated water is increased.
In particular, when treated water has a rapid increase in organic load in a short time, the countermeasure of Patent Document 1 avoids a deterioration in the concentration of organic matter in treated water because the effect of the countermeasure is less than the increase in organic load. In other words, there is a problem that wastewater standards cannot be achieved.
Here, as an increase in organic load in a short period of time, for example, an increase / decrease of 4% or more per hour on average (for example, when the concentration of organic substance increases 5 times in about 2 hours) is assumed. Such rapid fluctuations cannot be quickly handled by conventional wastewater treatment technology.

  Therefore, when processing industrial park wastewater collected from various factories, take measures to increase the treatment rate of activated sludge treatment in advance even when the load of organic matter in the treated water increases in a short time, for example. The emergence of an industrial wastewater treatment system that can do this is eagerly desired.

  In view of the above problems, the present invention provides an industrial wastewater treatment system and method capable of enhancing the treatment capacity of treated water from an industrial park when a sudden increase in the concentration of organic substances arrives at an activated sludge treatment apparatus. It is an issue to provide.

1st invention of this invention for solving the subject mentioned above is the secondary treatment which carries out the secondary treatment of the inflow water processed by the said primary treatment means with the activated treatment sludge which carries out the primary treatment of the industrial park waste water. Means, an organic substance concentration measuring means for measuring the organic substance concentration in the industrial park drainage flowing into the primary treatment means, and an activator for activating important microorganisms contained in the activated sludge is administered to the secondary treatment means. An activator administration means, and the composition of the inflowing water flowing into the secondary treatment means is determined based on the measurement result of the organic substance concentration measurement means, and the industrial estate drainage 11 is determined based on the measurement result of the organic substance concentration measurement means. determine organic load in the increases in a short time, when the high-concentration waste water increased organic load in a short time, performs administration of the active agents corresponding to the determination described composition, projecting in the activator In industrial waste water treatment systems, characterized in that to improve the activity of the important microorganisms by.

According to a second aspect of the present invention, there is provided an industrial wastewater treatment system according to the first aspect, further comprising a control unit that controls administration of an activator corresponding to the determined composition.

  A third invention is the industrial wastewater treatment system according to the first or second invention, wherein the high-concentration wastewater has an organic matter concentration increase rate of 4% or more per hour in the industrial estate wastewater. is there.

According to a fourth invention, in any one of the first to third inventions, the primary treatment means has a buffer tank for temporarily receiving and storing the industrial park drainage, and the industrial park flowing into the buffer tank In the industrial wastewater treatment system, the organic matter concentration in the wastewater is measured by the organic matter concentration measuring means.

According to a fifth invention, in any one of the first to fourth inventions, the secondary treatment means includes a microorganism existence ratio measuring means for measuring the existence ratio of important microorganisms, and is measured by the microorganism existence ratio measurement means. results, the important microorganisms which correspond to the composition of the inlet water was determined by the measurement result of the organic substance concentration measuring means determines whether it is appropriate, the determination result, if not appropriate, the secondary treatment means The present invention provides an industrial wastewater treatment system characterized in that the activity of important microorganisms contributing to the activated sludge treatment is improved by administration of an activator corresponding to the determined composition.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the apparatus includes a respiration rate measurement unit that grasps the activity status of the microorganisms of the secondary processing unit, and whether the measurement result of the respiration rate measurement unit is appropriate. If the result of the determination is not appropriate, the activity of the microorganism that contributes to the processing of the secondary processing means is improved by administering an activator corresponding to the determined composition. It is in an industrial wastewater treatment system characterized by that.

According to a seventh aspect of the present invention, in any one of the fourth to sixth aspects, the secondary processing unit includes a bypass line that extracts a part of the inflow water before flowing into the buffer tank and bypasses the primary processing unit. Industrial wastewater treatment system characterized by mixing with inflow water flowing into the water.

According to an eighth invention, in any one of the first to sixth inventions, when the organic matter concentration of the influent water is high, high concentration drainage storage for temporarily storing the influent water having a high organic matter concentration from the primary treatment means. The industrial wastewater treatment system is characterized in that a tank is provided and high concentration organic inflow water is mixed with inflow water flowing into the secondary treatment means instead of the activator.

A ninth aspect of the present invention, a primary processing means for primary treatment of industrial waste water, and a secondary processing means for secondary treatment by important microorganisms influent said treated with primary treatment unit, active for activating the important microorganisms comprising an active agent dosage unit for administering the agent to the secondary processing unit, and a microorganism existing ratio measuring means for performing the kind of analysis of important microorganisms of the secondary treatment unit, analyzed by the microorganism proportions measuring means is the result, it is determined whether the microorganism corresponds to the composition of the influent water is appropriate, the result of the determination, if not appropriate, administration of the active agents corresponding to the determination described composition, pre Symbol in industrial waste water treatment systems, characterized in that to improve the activity of important microorganisms contributes to activated sludge treatment of secondary treatment means.

A tenth invention is the industrial wastewater treatment system according to the ninth invention, wherein the primary treatment means has a buffer tank for temporarily receiving and storing the industrial estate wastewater.

In an eleventh aspect of the invention according to the tenth aspect of the present invention, a part of the inflow water before flowing into the buffer tank is extracted, and a bypass line is provided to bypass the primary treatment means, and the inflow water flowing into the secondary treatment means It is in an industrial wastewater treatment system characterized by mixing with.

In a twelfth aspect according to any one of the ninth to eleventh aspects, when the organic matter concentration of the influent water is high, the high concentration drainage storage for temporarily storing the influent water having a high organic matter concentration from the primary treatment means. The industrial wastewater treatment system is characterized in that a tank is provided and high concentration organic inflow water is mixed with inflow water flowing into the secondary treatment means instead of the activator.

In a thirteenth aspect of the present invention, in any one of the first to twelfth aspects of the present invention, a membrane treatment device for membrane treating the effluent from the secondary treatment means, and regenerating the effluent after treatment in the membrane treatment device. An industrial wastewater treatment system comprising a regeneration treatment apparatus.

A fourteenth aspect of the invention includes a primary treatment step for primary treatment of industrial estate wastewater, a secondary treatment step for secondary treatment of the influent water treated in the primary treatment step with activated sludge, and an industry flowing into the primary treatment step. has a concentration of organic substances measurement step of measuring the concentration of organic substances in the complex waste water, and an activating agent administering step of administering an activating agent to activate the important microorganisms contained in the activated sludge in the secondary treatment process, the Whether the composition of inflow water flowing into the secondary treatment means is judged from the measurement result of the organic substance concentration measurement step, and the organic substance load in the industrial estate drainage is increased in a short time by the measurement result of the organic substance concentration measurement means. It determines, in the case of high concentration wastewater increasing organic load in a short time, performs administration of the active agents corresponding to the determination by the composition, to improve the activity of the important microorganisms by administration of the active agent In industrial waste water treatment method characterized by.

A fifteenth aspect of the invention is an industrial wastewater treatment method according to the fourteenth aspect of the invention, further comprising a control step of controlling the administration of the activator corresponding to the determined composition.

  A sixteenth invention is the industrial wastewater treatment method according to the fourteenth or fifteenth invention, wherein the high-concentration wastewater has an organic matter concentration increase rate in the industrial park wastewater of 4% or more per hour. .

According to a seventeenth aspect , in any one of the fourteenth to sixteenth aspects, the primary treatment step temporarily receives and stores the industrial park drainage, and the concentration of organic matter in the industrial park drainage flowing before the storage It is in the industrial waste water treatment method characterized by measuring.

An eighteenth invention, in any one invention of the first 14 to 17, comprising the step of performing a measurement of the abundance ratio of important microorganisms of the secondary treatment process, the measurement result of the existence ratio of the important microorganisms, It is determined whether or not the microorganism corresponding to the composition of the inflowing water obtained from the measurement result of the organic matter concentration measurement step is appropriate, and if the result of the determination is not appropriate, the activated sludge treatment in the secondary treatment step is performed. In the industrial wastewater treatment method, the activity of the contributing important microorganisms is improved by administering an activator corresponding to the determined composition.

A nineteenth invention, in any one invention of the first 14 to 18, have a respiration rate measurement process to understand the activity status of microorganisms of the secondary treatment process, the measurement result in the respiration rate measurement process Determining whether it is appropriate, and if the result of the determination indicates that it is not appropriate, the microorganism that contributes to the treatment in the secondary treatment step is activated by administering an activator corresponding to the determined composition. It is in the industrial waste water treatment method characterized by improving.

The twentieth invention, in any one invention of the first 14 to 19, extracting a portion of the incoming water from the previous inflow storing step includes the step of bypassing the primary treatment step, it flows into the secondary treatment process It is in the industrial wastewater treatment method characterized by mixing with the inflowing water.

Invention of the 21, in any one invention of the first 14 to 20, wherein when organic material concentration of the inflow water is high, has a temporarily storing step the influent of the primary processing steps, the active agent In an industrial wastewater treatment method, inflow water having a high organic matter concentration is mixed with inflow water flowing into the secondary treatment step.

Twenty-second aspect of the present invention, a primary treatment step of the primary process the industrial waste water, a secondary treatment step of secondary treatment by important microorganisms influent said treated with primary treatment step, the activity of activating the important microorganisms has a activator administration step of administering a agent to the secondary processing step, and a microorganism existing ratio measurement step of performing a type of analysis of important microorganisms of the secondary treatment steps, the analysis by the microorganism proportions measuring step is the result, it is determined whether the microorganism corresponds to the composition of the influent water is appropriate, the result of the determination, if not appropriate, administration of the active agents corresponding to the determination described composition, pre Symbol in industrial waste water treatment method characterized by enhancing the activity of key microorganisms contributes to activated sludge treatment of secondary treatment process.

A twenty- third invention is the industrial wastewater treatment method according to the twenty-second invention , wherein the primary treatment step temporarily receives and stores the industrial estate wastewater in a buffer tank.

24th aspect, in the twenty-third invention, extracting a portion of the incoming water from prior to entering the buffer tank has a bypass line step of bypassing the primary treatment step, flows into the secondary treatment process It is in the industrial waste water treatment method characterized by mixing with inflow water.

In a twenty- fifth aspect according to any one of the fourteenth to twenty- fourth aspects, when the organic matter concentration of the influent water is high, the influent water having a high organic matter concentration from the primary treatment step is temporarily stored in the high-concentration drainage storage tank. The industrial wastewater treatment method is characterized by storing and mixing organic substance high-concentration influent instead of the activator with inflow water flowing into the secondary treatment step.

According to a twenty-sixth aspect of the present invention, in any one of the fourteenth to twenty- fifth aspects, a membrane treatment step for membrane treatment of the effluent from the secondary treatment step, and regeneration of the effluent after treatment in the membrane treatment step in industrial waste water treatment method comprising Rukoto to have a regeneration process.

  According to the present invention, when processing industrial park wastewater collected from various factories, for example, even when the load of organic matter in the treated water increases in a short time, the organic matter that measures the concentration of organic matter in the inflowing industrial wastewater By providing the concentration measuring means and the activator administration means for administering the activator for activating the microorganisms to the secondary treatment means, the microorganism treatment speed in the activated sludge treatment apparatus as the secondary treatment means is previously determined. Measures can be taken to increase it.

FIG. 1 is a schematic diagram of an industrial wastewater treatment system according to the first embodiment. FIG. 2 is a schematic diagram of another industrial wastewater treatment system according to the first embodiment. FIG. 3 is a schematic diagram of another industrial wastewater treatment system according to the first embodiment. FIG. 4 is a schematic diagram of another industrial wastewater treatment system according to the first embodiment. FIG. 5 is a schematic diagram of another industrial wastewater treatment system according to the first embodiment. FIG. 6 is a diagram showing the relationship between the treatment time in the activated sludge treatment apparatus and the COD concentration (oxygen demand (CODCr) by potassium dichromate). FIG. 7 is a schematic diagram of another industrial wastewater treatment system according to the first embodiment. FIG. 8 is a schematic diagram of another industrial wastewater treatment system according to the first embodiment. FIG. 9 is a schematic diagram of an industrial wastewater treatment system according to the second embodiment. FIG. 10 is a diagram illustrating an example of a measurement result of the microorganism existence ratio measurement unit. FIG. 11 is a process flow diagram using the microorganism existence ratio measuring means. FIG. 12 is a schematic diagram of an industrial wastewater treatment system according to the third embodiment. FIG. 13 is a diagram illustrating a measurement result of the respiration rate. FIG. 14 is a schematic diagram of an industrial wastewater treatment system according to the fourth embodiment. FIG. 15 is a diagram showing the relationship between the treatment time and the COD concentration in the waste water. FIG. 16 is a diagram showing an activated sludge simulation result of the treated water concentration with and without the activator. FIG. 17 is a diagram showing the activated sludge simulation result of the treated water concentration due to the presence of the activator. FIG. 18 is a diagram showing simulation results of activated sludge having other treated water concentrations due to the presence of an activator.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

FIG. 1 is a schematic diagram of an industrial wastewater treatment system according to the first embodiment.
As shown in FIG. 1, an industrial wastewater treatment system 10A according to the present embodiment includes a buffer tank 12 that temporarily receives and stores industrial estate wastewater 11, and primary treatment means that primarily treats effluent water 11A from the buffer tank 12. 13, the activated sludge treatment device 14 that is a secondary treatment means for secondary treatment of the influent water 11 </ b> B treated by the primary treatment means 13, and the organic matter concentration in the industrial estate drainage 11 flowing into the buffer tank 12. An organic substance concentration measuring means 15 for measuring, and an activator administration means 17 for administering an activator 16 for activating important microorganisms contained in the activated sludge of the activated sludge treatment apparatus 14 to the secondary treatment means, the measurement results of the concentration measuring unit 15, to determine the composition of the influent water 11 in B, row by the control unit 20 the administration of the active agent 16 corresponding to the determined composition In addition, the activity of the microorganism is improved by the administration of the activator 16.

  According to the present embodiment, when processing the industrial park drainage 11 collected from various factories, for example, when the load of organic matter in the industrial park drainage 11 that is treated water increases in a short time, for example, an average of 1 hour Even when the increase / decrease is 4% or more, the organic substance concentration measuring means 15 for measuring the organic substance concentration in the industrial estate drainage 11 flowing into the buffer tank 12 and the activator 16 for activating activated sludge are used as the secondary treatment means. By providing the activator administration means 17 to be administered, it is possible to provide an industrial wastewater treatment system capable of taking measures to increase the treatment speed of microorganisms in advance in the activated sludge treatment apparatus 14 which is a secondary treatment means. .

Here, the value of 4% of increase / decrease of 4% or more per hour is the maximum value (10 ° C.) of the growth rate of the microorganisms constituting the activated sludge. In addition, if it is an organic substance density | concentration increase speed of 4% / H or less, activated sludge can be propagated according to load fluctuation. On the other hand, if it exceeds 4% / H, the growth of activated sludge cannot keep up with the increase in organic matter concentration, and the treated water deteriorates.
On the other hand, even when the increase in organic matter concentration exceeds 4% / H as in this embodiment, the organic matter concentration measuring means 15 observes the increase in organic matter concentration in the influent water, and the high concentration drainage is activated. By activating the activated sludge by introducing the activator 16 before reaching the sludge treatment apparatus 14, an increase in the treated water concentration is reduced.

  Here, for example, an increase / decrease of 4% or more per hour on average is specifically assumed when the organic substance concentration increases 5 times in about 2 hours, but is not limited thereto. Absent.

  In the present invention, the industrial estate drainage 11 is a combination of domestic wastewater (sewage) generated in an industrial estate and industrial wastewater. In the composition of industrial wastewater, depending on the type of work in the industrial park, for example, oil such as lubricating oil, paint, solvent, liquid organic waste, sugar liquid, juice, acid fermentation liquid, oils and fats are organic sources. Applicable.

The organic matter concentration measuring means 15 measures the concentration of the organic matter in the industrial estate drainage 11 when flowing into the buffer tank 12. As an index for measuring the concentration of organic matter, for example, biochemical oxygen demand (Biochemical O xygen D emand: BOD ), chemical oxygen demand (Chemical Oxygen Demand: COD), total organic carbon (Total Organic Carbon: TOC) , Oil content, ultraviolet absorbance and the like.

Here, there are two types of COD: oxygen demand by potassium permanganate (CODMn) and oxygen demand by potassium dichromate (CODCr).
The organic substance concentration measuring means 15 measures the organic substance concentration in the industrial estate drainage 11 and sends the result to the control means 20.

  The primary treatment means 13 includes, for example, an oil / water separation unit 13A, a coagulation sedimentation unit 13B, and a storage tank 13C, and performs the primary treatment of the industrial estate drainage 11. Note that an initial settling device or the like may be added.

The buffer tank 12 stores the industrial park drainage 11 for a certain period of time, and has a hydraulic retention time (HRT). Here, hydraulic residence time (HRT (H)) = buffer tank capacity (m ³ ) / liquid flow rate Q (m ³ / h). In the present embodiment, the primary processing means includes the buffer tank 12 to constitute the temporary processing means 13, but the present invention includes a primary processing means 13 that does not include the buffer tank 12.

  The secondary treatment means is the activated sludge treatment device 14 and its modified method. Specifically, a standard activated sludge method, a membrane separation activated sludge method (Membrane Bioreactor: MBR), a method using a microfiltration membrane (MF membrane) or an ultrafiltration membrane (UF membrane), a biofilm method (Bio-Film Reactor) : BFR), a method using a biological carrier, and the like.

Here, examples of combinations of the secondary treatment means, the membrane separation apparatus provided in the subsequent stage, and the regenerator for water regeneration provided in the subsequent stage are shown in 1) to 8) below.
1) The secondary treatment means is a standard activated sludge method, the membrane treatment device is an ultrafiltration membrane (UF membrane), and the regeneration device is a combination of a reverse osmosis membrane device.
2) The secondary treatment means is a standard activated sludge method, the membrane treatment device is a microfiltration membrane (MF membrane), and the regeneration device is a combination of a reverse osmosis membrane device.
3) The secondary treatment means is a membrane separation activated sludge method (Membrane Bioreactor: MBR), and the regenerator is a combination of reverse osmosis membrane devices.
4) The secondary treatment means is a bio-film method (Bio-Film Reactor: BFR), the membrane treatment device is an ultrafiltration membrane (UF membrane), and the regeneration device is a combination of a reverse osmosis membrane device.
5) A secondary treatment means is a bio-film method (Bio-Film Reactor: BFR), a membrane treatment device is a microfiltration membrane (MF membrane), and a regeneration device is a combination of a reverse osmosis membrane device.
6) The secondary treatment means is a biofilm method (Bio-Film Reactor: BFR) and a membrane separation activated sludge method (Membrane Bioreactor: MBR), and the regenerator is a combination of reverse osmosis membrane devices.
7) The secondary treatment means is a biological carrier, the membrane treatment device is an ultrafiltration membrane (UF membrane), and the regeneration device is a combination of a reverse osmosis membrane device.
8) A combination of a secondary treatment means is a biological carrier, a membrane treatment device is a microfiltration membrane (MF membrane), and a regeneration device is a reverse osmosis membrane device.

FIG. 2 is a schematic diagram of another industrial wastewater treatment system according to the first embodiment.
The industrial waste water treatment system 10B of the present embodiment is further provided with a membrane treatment device (UF membrane, MF membrane or MBR) 31 in the subsequent stage of the activated sludge treatment device 14 which is a secondary treatment means, and the treated water in the subsequent stage. A reverse osmosis membrane device 32 having an RO membrane (Reverse Osmosis membrane), which is a water regeneration device for treating 11D, is provided to produce reclaimed water 33. In addition, the code | symbol 34 is concentrated water.

  Here, as a water regeneration method, in addition to using the reverse osmosis membrane device 32, for example, a nanofilter (NF), electrodialysis (ED), polarity switching electrodialysis device (Electrodialysis Reverse: EDR), electrostatic desorption, etc. Ions (CDI) can also be used.

  As a result, since the processing speed is increased by administering the activator against the fluctuation in organic substance concentration, it is possible to prevent a significant increase in the organic substance concentration flowing into the reverse osmosis membrane device 32 in the regeneration process. As a result, RO membrane fouling (for example, bio-fouling, chemical fouling) can be prevented.

FIG. 3 is a schematic diagram of another industrial wastewater treatment system according to the first embodiment.
The industrial wastewater treatment system 10C of this embodiment is provided with a membrane separation activated sludge treatment device (MBR) 15A instead of the activated sludge treatment device 14 which is a secondary treatment means in the industrial wastewater treatment system 10B shown in FIG. The stage is provided with a reverse osmosis membrane device 32 which is a water reclaiming device for treating the treated water 11C, and the reclaimed water 33 is produced.

FIG. 4 is a schematic diagram of another industrial wastewater treatment system according to the first embodiment.
The industrial wastewater treatment system 10D of this embodiment is provided with a biofilm treatment device (BFR) 15B instead of the activated sludge treatment device 14 which is a secondary treatment means in the industrial wastewater treatment system 10B shown in FIG. A device (for example, a UF membrane) 31 is provided, and a reverse osmosis membrane device 32, which is a water regeneration device for treating the treated water 11D, is provided at the subsequent stage to produce the recycled water 33.

FIG. 5 is a schematic diagram of another industrial wastewater treatment system according to the first embodiment.
The industrial wastewater treatment system 10E of the present embodiment has a biofilm treatment device (BFR) on the upstream side of a membrane separation activated sludge treatment device (MBR) 15A that is a secondary treatment means in the industrial wastewater treatment system 10C shown in FIG. 15B is provided, and a reverse osmosis membrane device 32, which is a water regeneration device for treating the treated water 11C, is provided downstream of the membrane separation activated sludge treatment device (MBR) 15A to produce the recycled water 33.
In the present embodiment, a bypass line 35 that normally bypasses the biofilm treatment apparatus 15B is provided, and when there is a change and treatment in the biofilm treatment apparatus 15B is required, the valve 36 of the bypass line 35 is closed, After the rough treatment by the biofilm treatment device 15B, this treatment is performed by the membrane separation activated sludge treatment device (MBR) 15A.

  Examples of the activator 16 to be administered to the activated sludge treatment apparatus 14 include organic substances / carbon sources (alcohols: ethanol, methanol, etc., hydrocarbons: glucose, etc., aromatic hydrocarbons: phenol, etc., sugars, organic acids: Acetic acid, etc.), nutrient salts (nitrogen, phosphorus, potassium, etc.), microbial preparations (activated sludge, microorganisms, yeast, etc., and their dried products. Drying methods are non-heated vacuum drying, freeze drying, etc.), extracts (yeast extract, Meat extract, etc.), waste (liquid organic waste, sugar solution, juice, acid fermentation broth, fats and oils), high-concentration wastewater (at least with higher concentration than industrial wastewater measured by organic matter concentration measuring means. High-concentration wastewater generated from wastewater is temporarily stored and used little by little during such load fluctuations), activated sludge (activated sludge concentrate, dewatered sludge, etc. generated in the facility), etc.

In this system, the role of the primary processing means 13 is to smooth the load fluctuation (concentration fluctuation) caused by the buffer tank 12 in particular, and after performing this smoothing, by applying the activator 16, Can handle higher concentration fluctuations.
For this reason, the smoothing hydraulic retention time (HRT) is preferably 2 hours or longer, more preferably 3 hours or longer. In addition, it is preferable that the time to reach the secondary treatment means (activated sludge treatment apparatus 14) after being measured by the organic substance concentration measurement means 15 is 2 hours or more, more desirably 3 hours or more.

FIG. 15 is a diagram showing the relationship between the treatment time and the COD concentration in the waste water. Here, in FIG. 15, the horizontal axis corresponds to time, and the vertical axis corresponds to the COD concentration.
FIG. 15 shows the effect of density smoothing by the buffer tank 12 and arrival delay by the primary processing means 13.
In FIG. 15, the industrial park drainage 11 as raw water corresponds to the COD concentration of the organic matter concentration measuring means 15. In the figure, it is indicated by a broken line. The hydraulic residence time HRT2H is the COD concentration in the tank of the buffer tank 12 or in the effluent water 11A. This is indicated by a one-dot chain line in the figure. Arrival time + 2H corresponds to the COD concentration of the storage tank 13C or inflow water 11B. This is indicated by the solid line in the figure.

As calculation conditions, the hydraulic residence time HRT2H of the buffer tank 12 was assumed, and the form of the container was assumed to be a complete mixing tank.
The total volume of the oil / water separation unit 13A, the coagulation sedimentation unit 13B, and the storage tank 13C is twice the flow rate (corresponding to an arrival time of 2 hours), and the form of the container is assumed to be a plug flow tank (no upstream / downstream mixing) did.

In FIG. 15, first, the COD concentration is reduced by smoothing the concentration by the buffer tank 12 (symbol A in FIG. 15). In this case, the maximum density is low, the minimum density is high, and the change with time of the density becomes gentle.
This makes it possible to process activated sludge within the organic matter treatment performance by changing sudden organic matter concentration fluctuations (= high concentration raw water) to slow concentration fluctuations, or treatment performance associated with activated sludge growth. Processing becomes possible by improvement.

  On the other hand, the arrival delay of the high concentration raw water by the buffer tank 12, the oil-water separation part 13A, the coagulation sedimentation part 13B, and the storage tank 13C occurs (reference numeral B in FIG. 15).

  By adding the activator within this delay time, increase the amount of activated sludge or increase the activity of activated sludge during the period until the peak of high organic matter reaches the activated sludge tank. Can do.

FIG.16 and FIG.17 is a figure which shows the activated sludge simulation result of the treated water density | concentration by the presence or absence of an activator. Here, in FIGS. 16 and 17, the upper graph shows the relationship between time and the concentration of raw water (industrial wastewater) organic matter (mg / L), and in the lower graph, the horizontal axis is time and the left vertical axis is The treated water organic matter concentration (mg / L), and the right vertical axis is the concentration of activated sludge (mg / L).
FIG. 16 shows the case without the activator, and FIG. 17 shows the case with the activator.

In the case of FIG. 16 (without an activator), high-concentration wastewater 1500 mg / L flows into the activated sludge tank at 9 to 11 hours, and at the same time, the treated water concentration increases to 72 mg / L at the maximum.
At this time, the inflow (9 hours) at the same time although the activated sludge concentration Ru order started to increase, not been increased to the activated sludge concentration that can handle the increase in the concentration of organic substances of the raw water.
Thus, even if the activated sludge concentration starts to increase after the concentration of organic matter in the raw water increases, it cannot cope with the increase in the organic matter concentration in the raw water.

On the other hand, in the case of FIG. 17 (with an activator), the concentration of organic matter in the raw water similarly increases at 9 to 11 hours. An activator is added. The concentration of the activator is set to 750 mg / L, which is 1/2 of the value of high-concentration wastewater (= 1500 mg / L).
As a result, the activated sludge concentration starts to increase, and the sludge concentration can be increased “in advance” at the time when the high-concentration drainage of the ninth hour has arrived.
Thus, when the activator is present, the concentration of organic matter in the treated water is 50 mg / L at the maximum, and can be reduced as compared with the case without the activator (72 mg / L).

On the other hand, since the treated water temporarily deteriorates due to the addition of the activator, it is necessary to adjust the addition concentration and time of the activator so that the treated water concentration falls within the allowable range.
The device configuration in this numerical simulation is one membrane-separated activated sludge tank (MBR1 tank), and the reaction considered is adsorption of organic matter to activated sludge, oxidative decomposition of adsorbed organic matter by activated sludge, self-digestion of activated sludge It was.

  Next, an operation method of waste water treatment using the industrial waste water treatment system according to the present embodiment will be described.

  The industrial park drainage 11 usually does not change much because a certain amount of drainage is discharged from each factory. However, if the organic substance concentration measuring means 15 detects a rapid concentration fluctuation, for example, an increase in the organic substance concentration by a factor of 5 in 2 hours, the control means 20 determines that it is abnormal.

  As a result of this determination, the activator 16 is added from the activator administration means 17 to the activated sludge treatment apparatus 14 of the secondary treatment means, and the activated sludge is obtained before the concentration fluctuation of the treated water reaches the activated sludge treatment apparatus 14. In the processing apparatus 14, a high organic matter concentration is generated in advance.

Here, it is desirable that the range of the high organic substance concentration is the same as the detected concentration to a concentration range of about ½. As the time for the high organic matter concentration, it is desirable that the time is 10 minutes or more and less than 2 hours.
Moreover, the addition frequency of the activator 16 may be continuous as described above, or may be intermittently performed a plurality of times.

  Here, as described above, the additive concentration of the activator is 100% to 50%, the time is 10 minutes or more and less than 2 hours, and the frequency is continuous or intermittent. Most preferably, the activated sludge amount is a high concentration. It is desirable that the treated water concentration at the time of drainage inflow is the minimum amount that is below the allowable range.

  Specifically, it is continuously added using the entire time for high-concentration wastewater to reach (in FIG. 17, 8 hours between the 1st and 9th hours). When the concentration after mixing the activator is as low as possible, deterioration of the treated water concentration and increase in the cost of adding the activator can be suppressed.

FIG. 18 is a diagram showing simulation results of activated sludge having other treated water concentrations due to the presence of an activator.
FIG. 18 shows the case where the activator is continuously added (the upper graph in FIG. 18), the maximum value of the organic concentration of the treated water is 32 mg / L, and the maximum concentration of the treated water organic matter in FIG. It can be further reduced compared to the value 50 mg / L.

Also, over time organics concentration measurement result by the organic matter concentration measuring unit 15 as an input condition, and input to the arithmetic unit, in the arithmetic unit, to predict the concentration of O Risho Risui 11C numerical simulation, this treatment You may make it determine the addition density | concentration of the activator 16 so that the density | concentration of the water 11C may satisfy predetermined conditions (for example, treated water density | concentration reference value etc.). The activator 16 is added by the control means 20 via the activator administration means 17 so that the determined addition concentration is obtained.

  Here, the treated water concentration reference value is a numerical value arbitrarily set by the user, administrator, etc. of the wastewater treatment facility, and refers to the concentration required for the treated water. The reason why the treated water is required is that it depends on the use conditions and regulations of the latter stage. If the use conditions are on the latter stage, for example, it is the condition of the concentration of water supplied to the reverse osmosis membrane RO. If so, it corresponds to the effluent quality standards voluntarily established by wastewater treatment plants such as the national and local governments.

As an effect of the operation of the present invention, in addition to reduction of the organic substance concentration, for example, reduction of nitrogen concentration, phosphorus concentration, suspension concentration and the like can be mentioned.
Moreover, as an example of the quality of treated water, the concentration of activated sludge treated water can be exemplified by COD _{cr of} 50 mg / L or less based on a voluntary standard in a wastewater treatment / regeneration plant.
Examples of other reference values include, for example, BOD <160 mg / L, COD _mn <160 mg / L, etc. in the water pollution prevention law drainage standard.
In addition, examples of the discharge standard of the waste water treatment facility include standards such as BOD <10 mg / L, COD <20 mg / L, total nitrogen <10 mg / L, total phosphorus <1 mg / L, etc. Is not limited to this.

According to this example, the activated sludge treatment rate is increased or the sludge concentration is increased by causing the activated sludge to experience a high organic matter concentration in advance before sudden increase in concentration to the activated sludge treatment apparatus 14. be able to.
Thereby, when the rapid density | concentration increase arrives at the activated sludge processing apparatus 14, the processing capability of the microorganisms in the activated sludge processing apparatus 14 can be raised.

  When the method of the present invention is not used, the increase in the sludge concentration and the treatment speed necessary to cope with the organic matter concentration increase rate cannot be obtained, and the organic matter concentration in the treated water increases, and the treated water quality deteriorates. Become.

FIG. 6 is a diagram showing the relationship between the treatment time in the activated sludge treatment apparatus and the COD concentration (oxygen demand (CODCr) by potassium dichromate).
In FIG. 6, in the case of steady operation, the COD value of the inflow wastewater changes at about 300 mg / L.
In this steady operation, when the concentration is changed (COD value is increased to 1500 mg / L) as indicated by symbol a in the figure, the high concentration operation is performed.
At this time, the COD concentration in the activated sludge treatment device 14 gradually increases in the activated sludge treatment device 14 (dotted line) when the COD treatment is not performed.

On the other hand, the activated sludge treatment device 14 treats the COD, reduces the COD concentration, and flows out.
In addition, when there is no activator 16 (no 1), the concentration of effluent drainage from the activated sludge treatment device 14 increases as the inflow wastewater to the activated sludge treatment device 14 becomes high in concentration, and the drainage standard ( For example, the drainage standard value does not satisfy 50 mg / L).
Further, even when there is no activator 16 (no 2), the concentration increases as the concentration increases and temporarily does not meet the drainage standard, but the activity of microorganisms increases thereafter and the treatment speed increases. When improved, the effluent drainage concentration decreases (white circle in the figure).

  On the other hand, when the activator 16 is administered prior to the increase in the high concentration, measures are taken to increase the activated sludge treatment speed in the activated sludge treatment device 14 in advance. Slight fluctuation.

  Thus, according to the present embodiment, rapid load fluctuations are detected in advance by the organic substance concentration measuring means 15, and the activation agent 16 is added to the activated sludge treatment device 14 in accordance with the result, thereby being activated. The treatment speed of the sludge treatment can be increased and the wastewater standard value can be prevented from exceeding. As a result, for example, even when there is a sudden concentration fluctuation, the drainage standard of the treated water 11C can always be satisfied.

FIG. 7 is a schematic diagram of another industrial wastewater treatment system according to the first embodiment.
As shown in FIG. 7, in the industrial wastewater treatment system 10 </ b> F according to this embodiment, a part 11 a of the industrial estate wastewater 11 introduced into the buffer tank 12 is bypassed by the primary treatment means 13, A bypass line 23 to be introduced on the front stage side is provided, and a part 11a of the bypassed industrial estate drainage 11 is mixed with the inflow water 11B flowing into the activated sludge treatment device 14.

  When the organic matter concentration measuring means 15 detects that the industrial park drainage 11 has a high concentration, the part 11a is bypassed and put into the activated sludge treatment device 14.

  This bypass amount is 50% or less of the flow rate to the activated sludge treatment device 14, and when it is introduced into the activated sludge treatment device 14, it should be bypassed so as to have a lower concentration (about 1/2) than the high concentration waste water. ing.

  As a result, by skipping the residence time required for the treatment by the primary treatment means 13, it is possible to use the high-concentration wastewater of the same composition as an activator before the high-concentration wastewater that has passed through the primary treatment means 13 arrives. it can.

  Since the composition to be added as the activator is the same as the composition of the high-concentration wastewater that reaches through the primary treatment means 13, the effect of improving the activity of the activated sludge in the activated sludge treatment device 14 by the activator is further enhanced, It is possible to increase the treatment speed of the high-concentration wastewater that reaches through the primary treatment means 13.

FIG. 8 is a schematic diagram of another industrial wastewater treatment system according to the first embodiment.
As shown in FIG. 8, in the industrial wastewater treatment system 10G according to the present embodiment, when the influent water 11B before flowing into the activated sludge treatment device 14 is high-concentration wastewater, a part of the high-concentration influent water 11b is used. It separates and stores in the high concentration inflow water storage tank 24, and supplies it according to the processing performance of subsequent activated sludge.

  In this case, the supply to the activated sludge treatment apparatus 14 does not need to be performed continuously and constantly, and the initial stage of supplying the activator with low processing performance is small and may be increased in the latter stage of supplying the activator. Moreover, when the organic substance which does not need addition of the activator 16 is a low density | concentration, processing performance can be improved by raising a density | concentration by adding the high concentration influent water 11b continuously little by little. . In biological treatment, neither increase in concentration nor decrease in concentration is desirable, so the concentration can be adjusted by adjusting the supply amount of the high-concentration influent 11b temporarily stored rather than the concentration fluctuation caused by the activator 16. It can be kept constant.

  In Example 1, the activator 16 is administered using the organic substance concentration measuring means 15, but if the increase in the organic substance concentration is known in advance, the activation is performed regardless of whether or not the organic substance concentration is measured. It becomes possible to add the agent 16.

  For example, in an industrial park, it is empirically known that the organic matter concentration increases during a high operation period. For this reason, by adding the activator 16 from these several days before, it can respond to the increase in the organic substance density | concentration by a high operation time in advance. In this way, the activator 16 can be used in advance based on the operation plan.

  At that time, the organic substance concentration measuring means 15 determines whether or not the organic substance concentration in the waste water is within an assumed range, and if it is within the assumption, administration of the activator 16 is not necessary. On the other hand, if it is confirmed that the concentration has increased more than expected, the activator 16 may be further administered to prepare for high concentration wastewater treatment.

  FIG. 9 is a schematic diagram of an industrial wastewater treatment system according to the second embodiment. In addition, about the same member as the structural member of Example 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted. As shown in FIG. 9, the industrial wastewater treatment system 10H according to the present embodiment is the same as the industrial wastewater treatment system 10A of the first embodiment, and further analyzes the types of important microorganisms of the activated sludge treatment apparatus 14 that is a secondary treatment means. A microorganism existence ratio measuring means 21 for performing (identification and quantification) is provided. And the result measured by this microorganism existence ratio measuring means 21 judges whether the important microorganisms corresponding to the composition in the industrial estate drainage 11 calculated | required by the measurement result of the organic substance concentration measuring means 15 are appropriate, and judgment As a result, when it is not appropriate, the activity of the important microorganisms contributing to the activated sludge treatment of the activated sludge treatment apparatus 14 is improved by administering the activator 16 corresponding to the determined composition.

The important microorganisms measured by the microorganism abundance ratio measuring means 21 are microorganisms that are particularly important for the identification of activated sludge among the microorganisms of the activated sludge treatment apparatus 14 that are specified in advance by the flora analysis means.
Examples of this important microorganism include organic matter-degrading bacteria that decompose organic matter in wastewater (for example, Sphingobacterias), petroleum-based component-degrading bacteria that decompose petroleum components (for example, Rhodocylaceae), and autotrophic bacteria (for example, Hydrogenophilaceae). , Thiobacillus genus, etc.) activated sludge treatment can be mentioned.

  Moreover, as an example of an important microorganism, an anaerobic bacterium (for example, Bacteroidales, Treponema genus, W22 genus), which preferably has a reduced ratio in activated sludge treatment, can be mentioned.

  In this example, in order to identify important microorganisms in advance in the flora analysis and quickly measure the identified important microorganisms, PCR primers (forward primer and reverse primer) and probes for measuring the abundance of microorganisms are created. . Thereafter, real-time PCR is performed by the cyber green method, and the balance of important microorganisms in the activated sludge treatment apparatus 14 is confirmed.

Specifically, by performing PCR using 16S rRNA or rDNA as a template, using a primer that detects organic substance-degrading bacteria of a specific Sphingobacteriaceae, a forward primer having a probe sequence, and a reverse primer, a base sequence between primer pairs A ratio of organic microorganisms that are important microorganisms such as Sphingobacteria can be measured.
When performing this PCR, it is preferable to use a nucleic acid fragment of a specific sequence with a labeling substance and use it as a probe, since the amplification state in the PCR process can be detected. As a probe with a label, a nucleic acid fragment obtained by binding a nucleic acid fragment to a labeling substance such as a radioactive element, an enzyme, a fluorescent substance, or a chemical substance can be used.

As a result of this quantitative PCR measurement, it is possible to grasp the ratio of the important microorganisms in the current activated sludge treatment apparatus 14.
FIG. 10 is a diagram illustrating an example of a measurement result of the microorganism existence ratio measurement unit. As shown in FIG. 10, the measurement of No1 is performed when the activated sludge treatment apparatus 14 is treating, and the balance of the bacteria when the important microorganisms are measured at a certain time (before the start of administration of the activator). Indicates. In the state of No1, the ratio of organic matter-decomposing bacteria is large, but the ratio of nitrogen-decomposing / autotrophic bacteria is small.

In such a ratio, when the organic substance concentration measuring means 15 detects that the nitrogen component in the industrial estate drainage 11 is high in the upstream of the buffer tank 12, the nitrogen decomposition is insufficient in this state. The activator 16 for improving the activity of the nitrogen-degrading bacteria is added from the activator administration means 17.
Thereby, it is possible to take measures to increase the treatment speed of microorganisms in advance before the industrial park drainage 11 having a high concentration of nitrogen component reaches the activated sludge treatment device 14.

Next, the measurement of No2 shows the balance at the time of measuring the important microorganisms at a certain point in the case where the treatment is performed by the activated sludge treatment apparatus 14.
In the state of No2, the distribution of organic matter-degrading bacteria is small and the ratio of nitrogen-decomposing / autotrophic bacteria is large.

In such a ratio, when the organic matter concentration measuring means 15 detects a high concentration of the organic matter component in the industrial estate drainage 11 in the upstream of the buffer tank 12, the organic matter decomposition is insufficient in this state. The activator 16 for improving the activity of the organic substance degrading bacteria is added from the activator administration means 17.
Thereby, it is possible to take measures to increase the treatment speed of microorganisms in advance before the industrial park drainage 11 having a high concentration of organic components reaches the activated sludge treatment device 14.

  As a result of adding the activator 16 from the measurement state of No2, the state of No3 is confirmed when the ratio is measured by the microorganism existence ratio measurement after a predetermined time has elapsed. The state of No3 is a balance of important microorganisms after administration of an activator that activates organic matter-degrading bacteria, and it can also be confirmed that the ratio of organic matter-degrading bacteria is high.

  In such a state, when the organic substance concentration measuring means 15 detects that the hydrogen component in the industrial estate drainage 11 is at a high concentration, hydrogen decomposition is insufficient in this state. The activator 16 for improving the effect is added from the activator administration means 17.

That is, there are many anaerobic bacteria at the beginning, but when the operation proceeds by administering the activator 16, the anaerobic bacteria decrease, and organic matter-decomposing bacteria, petroleum-based component-decomposing bacteria , nitrogen-decomposing bacteria and independent Nutritional microorganisms increase and the proportion of important microorganisms changes. Since this important microorganism is related to the processing rate of organic matter, the processing performance of the activated sludge treatment apparatus 14 can be measured by grasping the ratio of the important microorganism.

The current treatment performance of the activated sludge can be grasped by the measurement of the microorganism existence ratio measurement.
Then, when the treatment performance of the organic matter is low (for example, the treated water BOD is high) and the result of measurement of the microbial abundance ratio measurement is not in an appropriate operating state, the activator 16 is added. It becomes possible to shift to a suitable driving situation. In addition, if the ratio of the important microorganisms that decompose the main components of the wastewater is small, the decomposition rate of the important organic substances is improved by adding microbial preparations, organic substances, nutrient salts, and the like.

  Here, the operation operation combining the organic substance concentration meter and the microbial abundance ratio measuring means will be described.

FIG. 11 is a process flow diagram using the microorganism presence ratio measuring means.
As shown in FIG. 11, the balance of microorganisms in the activated sludge treatment apparatus 14 is confirmed by the microorganism existence ratio measuring means (for example, a real-time PCR apparatus) 21 (S-1).
Next, it is detected that there is a sudden load variation as a result of measurement by the organic substance concentration measuring means 15 (S-2).
It is determined whether or not the balance of microorganisms in the current activated sludge treatment apparatus 14 is acceptable (S-3).
As a result of the determination, if it is appropriate (Yes), the process is performed in the state of the current activated sludge treatment apparatus 14 (S-4).
On the other hand, if the result of determination is not appropriate (No), the activator 16 corresponding to the analysis of the organic matter concentration measuring means 15 is added from the activator administration means 17 (S-5).
After a predetermined time elapses, it is confirmed that the balance of the bacteria is changed to cope with the load fluctuation (S-6).
If the result of determination in step (S-3) is not appropriate, the following measures can be taken.

  If there are few microorganisms to be grown due to the balance of microorganisms in the current activated sludge treatment equipment, an activator is added, and microorganisms to be reduced in the balance of microorganisms in the current activated sludge treatment equipment (anaerobic) When there are many (bacteria), you may make it increase the input amount of air or oxygen.

  In addition, in a certain factory for several days ago, when the information that petroleum-based substances may be mixed into wastewater is detected, in Example 1, the activator 16 is usually administered to prepare for it. In Example 2, first, the ratio of important microorganisms is measured by the microorganism abundance ratio measuring means 21, and if it is confirmed that the ratio of petroleum-based component degrading bacteria is already sufficient as a result of this measurement, the activation is performed. Administration of the agent 16 becomes unnecessary, and administration of the useless activator 16 can be avoided.

  In the present embodiment, the microorganism presence ratio measuring means 21 uses a real-time PCR apparatus as a means for rapidly performing the flora analysis, but the present invention is not limited to this, and for example, messenger RNA or the like is used. An analysis method, a flow cytometry method of optically analyzing a specific microorganism using a probe that hybridizes to specific DNA, or the like may be applied to measure the abundance ratio of a specific important microorganism.

  FIG. 12 is a schematic diagram of an industrial wastewater treatment system according to the third embodiment. In addition, about the same member as the structural member of Example 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted. As shown in FIG. 12, the industrial wastewater treatment system 10I according to the present embodiment is further provided with a respiratory rate measuring means 22 for measuring the respiratory rate of the activated sludge treatment apparatus 14 in the industrial wastewater treatment system 10A of the first embodiment. Then, it is determined whether or not the measurement result of the respiration rate measuring means 22 is appropriate. If the result of determination is not appropriate, the microorganisms that contribute to the treatment of the activated sludge treatment apparatus 14 correspond to the determined composition. The activity is improved by administration of the activator 16.

The present processing performance of activated sludge can be grasped by this respiration rate analysis.
Here, the relationship between the decomposition of organic matter and the consumption of dissolved oxygen DO is the following reaction, and oxygen is consumed during the decomposition of organic matter. For this reason, the decomposition rate of the organic matter can be inferred from the decrease rate of the oxygen concentration. For example, glucose degradation is shown.
C ₆ H ₁₂ O ₆ + O ₂ → 6CO ₂ + 6H ₂ O
Therefore, when the treatment performance of organic matter is low (for example, the treated water BOD is high) and the result of respiration rate measurement is not in a suitable driving situation, it shifts to a suitable driving situation by adding an activator. Let
If the respiration rate for the main component of the wastewater is smaller than the specified value by measuring this respiration rate, add a microbial preparation or organic substance (= the same as the main component of the drainage) suitable for decomposition of the substance, addition of nutrient salt, etc. Add as activator.

FIG. 13 is a diagram illustrating a measurement result of the respiration rate.
In FIG. 13, the horizontal axis represents time, and the vertical axis represents the dissolved oxygen concentration.
As the respiration rate meter, “TS Checker (trade name)” manufactured by Ogawa Environment Laboratory Co., Ltd. was used.
In this graph, the decrease rate of dissolved oxygen (slope of the graph) corresponds to the oxygen consumption rate, that is, the respiration rate. From this respiration rate, the processing rate of organic matter decomposition can be grasped.

  The upper part of FIG. 13 is a state before acclimation of activated sludge before the start of the test (= low organic matter treatment performance), and the lower part of FIG. 13 is after a certain period of time (after acclimation of activated sludge (= high organic matter treatment performance). )).

  (0) is the respiration rate, (1) is the addition of the reference solution, (2) is the addition of drainage, (3) is the addition of sodium acetate, (4) is the dissolved oxygen concentration graph by adding the phenolic compound, respectively. It is. The respiratory rate can be obtained from the slope of this graph. For example, when comparing the graphs of respiration rate (0), it is found that the inclination of the graph is steep after the test, and the respiration rate is increased. Further, when the graph of the phenol compound (4) was compared, it was confirmed that although there was almost no respiration rate, that is, the phenol decomposition rate before the test, the respiration rate increased after the test, so that the phenol decomposition rate was also improved.

  Thus, the present organic matter treatment performance of the activated sludge of the activated sludge treatment device 14 can be measured by measuring the breathing rate by the breathing rate measuring means 22.

FIG. 14 is a schematic diagram of an industrial wastewater treatment system according to the fourth embodiment. In addition, about the same member as the structural member of Example 1 and 2, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted. As shown in FIG. 14, the industrial wastewater treatment system 10J according to the present embodiment includes a buffer tank 12 that temporarily receives and stores the industrial estate wastewater 11,
A primary treatment means 13 for primary treatment of the effluent water 11A from the buffer tank 12, and a secondary treatment means (activated sludge treatment device) 14 for secondary treatment of the influent water 11B treated by the primary treatment means 13 with microorganisms; ,
The activator administration means 17 for administering the activator 16 for activating the microorganisms to the activated sludge treatment apparatus 14 as the secondary treatment means, and the important microorganisms of the secondary treatment means (activated sludge treatment apparatus) 14 A microbial abundance ratio measuring means 21 for performing types of analysis (identification and quantification), and the result measured by the microbial abundance ratio measuring means 21 indicates whether or not the microorganism corresponding to the composition in the industrial estate drainage 11 is appropriate. If the result of the determination shows that it is not appropriate, the microorganisms contributing to the activated sludge treatment of the secondary treatment means (activated sludge treatment apparatus) 14 are administered with the activator 16 corresponding to the determined composition. Therefore, the activity is improved.
The industrial waste water treatment system 10J of the present embodiment is configured by deleting the organic substance concentration measuring means 15 from the industrial waste water treatment system 10H of the second embodiment.

  In the second embodiment, the organic substance concentration measuring means 15 is used, but in this embodiment, the balance of the microorganisms in the activated sludge treatment apparatus 14 is confirmed only by the microorganism presence ratio measuring means 21 and a countermeasure is taken according to the balance. By doing, the state of the activated sludge treatment apparatus 14 is made into a favorable state.

  By using this microbial abundance ratio measuring means 21, in accordance with the current balance in the activated sludge treatment device 14, by grasping the important microorganisms that want to grow and the important microorganisms that want to decrease, and responding accordingly, The activated sludge treatment apparatus 14 can be maintained in an appropriate state.

  The microorganisms to be grown are aerobic bacteria. For example, when the presence ratio of organic matter-decomposing microorganisms, nitrogen-decomposing microorganisms, autotrophic microorganisms, and petroleum component-decomposing microorganisms is small, the activator 16 for proliferating them is administered.

For example, when it is desired to grow organic matter-decomposing microorganisms, organic matter (for example, sugar, alcohol, etc.) is administered as the activator 16.
When it is desired to grow nitrogen-decomposing microorganisms, for example, ammonia, ammonium sulfide, ammonium chloride, or urea is administered as the activator 16.
When autotrophic microorganisms are to be grown, a metal (eg, iron, nickel, manganese, cobalt, etc.) is administered as the activator 16.
When it is desired to grow petroleum component-decomposing microorganisms, for example, phenol, benzene, toluene, ethylbenzene, and xylene are administered as activators 16 for decomposing aromatic organic carbon. In addition, when it is desired to grow microorganisms for the decomposition of linear organic carbon, for example, vegetable oil or the like is administered as the activator 16.

Further, when the presence ratio of the microorganisms desired to be reduced by the measurement result of microbial existence ratio measuring means 21 is large, grasps anaerobic microorganisms, H ₂ producing bacteria, methanogenic bacteria, the existence ratio of such sulfate-reducing bacteria, which In order to reduce this, an enzyme is added or oxygen (air) is supplied.

  According to the present embodiment, by performing the measurement by the microorganism presence ratio measuring means 21 of the activated sludge treatment device 14, the present microbial state is grasped, and from the grasped result, the microorganisms to be grown and the microorganisms to be reduced are determined. The activated sludge treatment apparatus 14 can be maintained in an appropriate state by grasping and responding accordingly (addition of the activator 16 or oxygen).

  Also in the fourth embodiment, the influent water flowing into the secondary treatment means is mixed using the bypass line 23 of the industrial wastewater treatment system 10F described in the first embodiment, or the primary treatment means 13 of the industrial wastewater treatment system 10G. A high-concentration inflow water storage tank 24 for temporarily storing inflow water having a high organic matter concentration is mixed with the inflow water flowing into the secondary treatment means instead of the activator 16. You may make it.

10A to 10J Industrial wastewater treatment system 11 Industrial park wastewater 12 Buffer tank 13 Primary treatment means 14 Activated sludge treatment equipment 15 Organic substance concentration measurement means 16 Activator 17 Activator administration means

Claims (17)

Primary treatment means for primary treatment of industrial estate wastewater;
Secondary treatment means for secondary treatment of the influent water treated by the primary treatment means with activated sludge;
Organic matter concentration measuring means for measuring the organic matter concentration in the industrial park drainage flowing into the primary treatment means,
An activator administration means for administering an activator for activating important microorganisms contained in the activated sludge to the secondary treatment means ;
Microbial abundance ratio measuring means for measuring the abundance ratio of important microorganisms of the secondary processing means ,
The measurement result of the organic substance concentration measuring unit determines the composition of the influent water flowing into the secondary treatment unit, a measurement result of the organic substance concentration measuring unit, organic loading of the industrial waste water is increased in a short time determine the case of a high concentration waste water increased organic load in a short time, performs administration of the active agents corresponding to the determination by the composition, to improve the activity of the important microorganisms by administration of the active agent ,
Further, the result measured by the microorganism abundance ratio measuring means determines whether or not an important microorganism corresponding to the composition of the influent water obtained from the measurement result of the organic matter concentration measuring means is appropriate,
As a result of the determination, if it is not appropriate, the important microorganisms contributing to the activated sludge treatment of the secondary treatment means are improved by administering the activator corresponding to the determined composition,
The above-mentioned important microorganism is an organic sludge bacterium that decomposes organic matter in wastewater, a bacterium that increases the ratio in the activated sludge treatment of any one of the petroleum-based component-degrading bacterium that decomposes petroleum-based components, and the autotrophic bacteria, and the activated sludge treatment An industrial wastewater treatment system characterized by being an anaerobic bacterium with a reduced ratio . In claim 1,
An industrial wastewater treatment system comprising control means for controlling administration of an activator corresponding to a determined composition. In claim 1 or 2,
The industrial wastewater treatment system characterized in that the high-concentration wastewater has an organic matter concentration increase rate in the industrial estate wastewater of 4% or more per hour. In any one of Claims 1 thru | or 3,
The primary processing means has a buffer tank for temporarily receiving and storing the industrial park wastewater, and the organic substance concentration in the industrial park wastewater flowing into the buffer tank is measured by the organic substance concentration measuring means. Industrial wastewater treatment system. In any one of Claims 1 thru | or 4 ,
Respiratory rate measuring means for grasping the activity status of microorganisms of the secondary processing means,
Determining whether or not the measurement result by the respiration rate measuring means is appropriate;
If the result of the determination is not appropriate, the activity of the microorganism that contributes to the processing of the secondary processing means is improved by administering an activator corresponding to the determined composition Wastewater treatment system. Oite to claim 4 or 5,
A part of the inflow water from before flowing into the buffer tank is extracted, and a bypass line is provided to bypass the primary treatment means,
An industrial wastewater treatment system characterized by mixing with the influent water flowing into the secondary treatment means. In any one of Claims 1 thru | or 5 ,
When the organic matter concentration of the inflow water is high,
A high concentration drainage storage tank for temporarily storing influent water having a high organic matter concentration from the primary treatment means is provided,
An industrial wastewater treatment system, characterized in that organic substance high concentration influent water is mixed with inflow water flowing into the secondary treatment means instead of the activator. In any one of Claims 1 thru | or 7 ,
A membrane treatment device for membrane treatment of effluent water from the secondary treatment means;
An industrial wastewater treatment system comprising a regeneration treatment device for regenerating the effluent after treatment in the membrane treatment device. A primary treatment process for primary treatment of industrial estate wastewater;
A secondary treatment step for secondary treatment of the influent water treated in the primary treatment step with activated sludge;
An organic matter concentration measuring step for measuring an organic matter concentration in the industrial estate drainage flowing into the primary treatment step;
An activator administration step of administering an activator for activating important microorganisms contained in the activated sludge to the secondary treatment step ;
Measuring the abundance ratio of important microorganisms in the secondary treatment step ,
Based on the measurement result of the organic matter concentration measurement step, the composition of the inflow water flowing into the secondary treatment step is judged, and the organic matter load in the industrial estate drainage increases in a short time by the measurement result of the organic matter concentration measurement step. In the case of high-concentration wastewater whose organic matter load increases in a short time, the activator corresponding to the determined composition is administered, and the activity of the important microorganisms is improved by the administration of the activator,
Furthermore, it is determined whether or not the important microorganism corresponding to the composition in the influent water obtained from the measurement result of the organic substance concentration measurement process is appropriate as a result measured in the microorganism existence ratio measurement process,
As a result of the determination, if it is not appropriate, an important microorganism that contributes to the activated sludge treatment in the secondary treatment step is improved by administering an activator corresponding to the determined composition,
The above-mentioned important microorganism is an organic sludge bacterium that decomposes organic matter in wastewater, a bacterium that increases the ratio in the activated sludge treatment of any one of the petroleum-based component-degrading bacterium that decomposes petroleum-based components, and the autotrophic bacteria, and the activated sludge treatment An industrial wastewater treatment method characterized by being an anaerobic bacterium with a reduced ratio . In claim 9 ,
An industrial wastewater treatment method comprising a control step of controlling administration of an activator corresponding to a determined composition. In claim 9 or 10 ,
The high-concentration wastewater is an industrial wastewater treatment method characterized in that the organic matter concentration increase rate in the industrial estate wastewater is 4% or more per hour. In any one of Claims 9 thru | or 11 ,
The industrial wastewater treatment method, wherein the primary treatment step temporarily receives and stores the industrial estate wastewater, and measures an organic matter concentration in the industrial estate wastewater flowing before the storage. In any one of claims 9 to 12 ,
Having a respiration rate measurement step for grasping the activity status of microorganisms in the secondary treatment step;
Determine whether the measurement result in the respiratory rate measurement step is appropriate,
If the result of the determination is not appropriate, the activity of the microorganism that contributes to the treatment of the secondary treatment step is improved by administering an activator corresponding to the determined composition Wastewater treatment method. In any one of Claims 9 thru | or 13 ,
A part of the influent water is extracted from before the inflow of the storage process, and the primary treatment process is bypassed.
An industrial wastewater treatment method comprising mixing with influent water flowing into the secondary treatment step. In any one of Claims 9 thru | or 14 ,
When the organic matter concentration of the inflow water is high,
Having a step of temporarily storing the influent water of the primary treatment step,
An industrial wastewater treatment method characterized by mixing influent water having a high organic substance concentration with inflow water flowing into the secondary treatment step instead of the activator. In any one of Claims 9 thru | or 15 ,
When the organic matter concentration of the inflow water is high,
Inflow water with a high organic matter concentration from the primary treatment step is temporarily stored in a high concentration drainage storage tank,
An industrial wastewater treatment method, characterized in that organic substance high concentration influent water is mixed with inflow water flowing into the secondary treatment step instead of the activator. In any one of Claims 9 thru | or 16 ,
A membrane treatment step for membrane treatment of the effluent from the secondary treatment step;
An industrial wastewater treatment method comprising a regeneration treatment step of regenerating the effluent after treatment in the membrane treatment step.

Images