JP4253301B2 - Purification processing equipment - Google Patents

Description

  The present invention relates to a purification treatment apparatus, and more particularly, to a wastewater purification treatment apparatus that can be purified with high efficiency while suppressing generation of waste even in wastewater containing organic pollutants at a high concentration.

In recent years, pollution of rivers or oceans by industrial wastewater or domestic wastewater has become a problem, and various methods for purifying the wastewater have been proposed. For example, a so-called activated sludge method is generally used as a method for removing pollutants in waste water.
The activated sludge method is a method that uses sludge (a mass of microorganisms) having activity (ability) for purifying wastewater. For example, Japanese Patent Application Laid-Open No. 54-95973 describes a technique in which waste water is introduced into a large-capacity septic tank, and a large number of sheet-like synthetic resin films are suspended in the septic tank. According to this technique, bacteria that remove organic pollutants are attached to a synthetic resin film and brought into contact with waste water over a wide area, so that bacteria remove organic pollutants and purify the quality of waste water.
Here, the supply of dissolved oxygen for activating microorganisms that remove organic pollutants is usually performed by a method of generating bubbles in the septic tank. That is, by sinking a pipe with many air holes into the wastewater of the septic tank and injecting air with a pump, bubbles are generated in the wastewater, and dissolved oxygen in the wastewater causes biological oxygen demand (so-called `` BOD ") is reduced.
However, the method of supplying dissolved oxygen to microorganisms by generating bubbles in the wastewater in this way is not a problem when the wastewater is mildly polluted, but in the case of wastewater containing organic pollutants at a high concentration However, there is a problem in that organic pollutants and microorganisms are present at the interface between the bubbles and water (waste water), thereby preventing contact between the bubbles and water. Therefore, the dissolution efficiency of oxygen in water is reduced, and an effective microorganism activation effect cannot be obtained.
Moreover, in order to make the introduced dissolved oxygen uniform and to make the activation of microorganisms by oxygen efficient, it is preferable to stir the waste water in the septic tank. In the prior art, it is common to use aeration stirring for this stirring. However, this aeration agitation is effective in the treatment in the state of low-concentration microorganisms (5000 ppm to 10000 ppm · MLSS), but it is difficult to effectively apply it to the treatment of wastewater containing organic pollutants at a high concentration. There was a problem that.
In this case, aeration agitation and mechanical agitation are used in combination, but the activation effect is still not sufficient. Therefore, when the stirring force by mechanical stirring is increased, there is a problem that the floc (activated sludge) may be destroyed.
Further, in the activated sludge method, when the purification of waste water is completed, the activated sludge and the waste water are separated and the waste water is discharged to the environment as purified water. The solid-liquid separation at this time is performed by a method in which a sludge settling tank (thickener tank) is provided in the final treatment tank, and the activated sludge is allowed to settle in the sludge settling tank to obtain purified treated water as a supernatant liquid. Therefore, in the case of wastewater containing organic pollutants at a high concentration, a large-scale sludge settling tank is installed in consideration of the relationship with sedimentation speed because it contains a large amount of solids (activated sludge) in the final treatment stage. There is a problem that the cost increases in terms of equipment and space.
Although a method of performing this solid-liquid separation by a filtration technique using a passage membrane is also being studied, as described above, if there are many solids, clogging is likely to occur, so frequent maintenance is required, Therefore, the single use of the passage membrane has a problem that the processing conditions are not stable over time.
The present invention has been made to solve the above-described problems, and even wastewater containing organic pollutants at a high concentration does not require a large installation space or complicated equipment, and is disposed of as sludge residue. It aims at providing the purification processing apparatus which can purify the wastewater highly efficiently, suppressing the discharge amount of a thing.

In order to achieve this object, the purification treatment apparatus of the first invention comprises a purification treatment tank to which waste water is supplied as treated water, and performs purification treatment of treated water supplied to the purification treatment tank, Dissolved oxygen supply that obtains dissolved oxygen treated water by dropping treated water taken from the purification treatment tank into the pressurized oxygen-containing gas atmosphere, and sends the obtained dissolved oxygen treated water back to the purification treatment tank. An apparatus, a microorganism killing apparatus that takes treated water from the purification treatment tank and kills microorganisms contained in the treated water, and sends back the treated water after the microorganism killing to the purification treatment tank, and the purification treatment tank A mixing and stirring device that stirs and mixes the treated water inside, and a passage membrane device that passes the purified treated water by removing the solid matter containing microorganisms from the treated water in the purification treatment tank by the passage membrane. Yes.
According to the purification treatment apparatus of the first aspect of the present invention, when waste water is supplied to the purification treatment tank as treated water, the treatment water is purified in the purification treatment tank.
In this case, the treated water taken from the purification treatment tank by the dissolved oxygen supply device is dropped into the pressurized oxygen-containing gas atmosphere and sent back to the purification treatment tank as dissolved oxygen treatment water containing a large amount of dissolved oxygen. . As a result, a high concentration of dissolved oxygen sufficient to activate microorganisms is supplied into the purification treatment tank.
The treated water taken from the purification treatment tank by the microorganism killing apparatus is killed by the microorganisms contained in the treated water and sent back to the purification treatment tank. As a result, the killed microorganisms are supplemented to the purification treatment tank as a nutrient source, the activation of the microorganisms is promoted, the killed microorganisms are decomposed, and the solid matter in the purification treatment tank is reduced.
Then, when the treated water in the purification treatment tank is stirred by the mixing and stirring device, the microorganisms contained in the treated water, the dissolved oxygen treated water, and the treated water after microbial killing are mixed, and the purification treatment by the microorganisms is promoted. Is done. Thereafter, the treated water in the purification treatment tank passes through the passage membrane of the passage membrane device, so that the solid matter containing microorganisms is removed, and the treated water is released to the environment as purified treatment water.
A purification treatment apparatus according to a second invention is the purification treatment tank according to the first invention, wherein the microbial killing apparatus is configured to take ozone into the treatment water taken from the purification treatment tank and the intake water taken by the intake apparatus. An ozone dissolving device that dissolves and kills microorganisms contained in the treated water, and a water feeding device that returns treated water in which microorganisms are killed by dissolving ozone by the ozone dissolving device to the purification treatment tank. .
The purification treatment apparatus of the third invention is the purification treatment apparatus of the second invention, wherein the water supply device of the microorganism killing device is from a water intake position where the water intake device takes the treated water after the microorganism has been killed. Is also configured to be sent back to the upstream side of the purification treatment tank.
A purification treatment apparatus according to a fourth aspect of the invention is the purification treatment apparatus according to the second or third aspect of the invention, further comprising a supply amount adjustment device that adjusts the treated water supplied to the purification treatment tank to a constant amount. And a storage tank, and when the waste water is larger than a certain amount to be supplied to the purification treatment tank, the waste water is stored in the storage tank, and the waste water is more than a certain amount to be supplied to the purification treatment tank. In the case where the amount is too small, the wastewater stored in the storage tank is supplied as treated water to adjust the treated water supplied to the purification treatment tank to a certain amount. The treated water after the microorganisms are killed is sent back to the storage tank of the supply adjusting device.
A purification treatment apparatus according to a fifth aspect of the present invention is the purification treatment apparatus according to any one of the first to fourth aspects of the invention, wherein the dissolved oxygen supply device is a purification treatment tank for sending the dissolved oxygen treated water back to the purification treatment tank. The discharge port of the water pipe is directed in a direction in which the dissolved oxygen-treated water is inclined with respect to the bottom of the purification treatment tank and toward the substantially central portion of the bottom. It is configured to be discharged.
A purification treatment apparatus according to a sixth aspect is the purification treatment apparatus according to the fifth aspect, wherein the dissolved oxygen supply device includes a water intake pipe communicated with the purification treatment tank in order to take treated water from the purification treatment tank. The intake port of the intake pipe is provided at a position higher than at least the discharge port of the water supply pipe with respect to the bottom of the purification treatment tank.
A purification treatment device according to a seventh aspect is the purification treatment device according to the sixth invention, wherein the intake port of the water intake pipe is disposed in the vicinity of the discharge port of the water supply pipe in a top view of the purification treatment tank.
A purification treatment apparatus according to an eighth invention is the purification treatment apparatus according to any one of the first to seventh inventions, wherein the purification blade is configured to be rotatable and agitating blades for agitating the treated water in the purification treatment tank by the rotational force, and the agitation An agitation assisting device having a driving device for applying a rotational driving force to the blades is provided.
A purification treatment apparatus according to a ninth aspect is the purification treatment apparatus according to any one of the first to eighth aspects, wherein the purification treatment tank has a bent surface at least at a part of a peripheral edge portion of a bottom thereof.
A purification treatment apparatus according to a tenth aspect of the invention is the purification treatment apparatus according to any one of the second to ninth aspects, wherein the ozone dissolving device of the microorganism killing apparatus is ozone filled with an ozone-containing gas pressurized to an atmospheric pressure or higher. The ozone container body is provided with an inlet for allowing the treated water taken from the purification treatment tank by the water intake device to flow into the ozone container body at the top of the ozone container body. The bottom is provided with an outlet for sending the treated water dropped from the inlet to the bottom of the ozone container body back to the purification treatment tank through the water feeding device.
The purification treatment apparatus according to an eleventh aspect of the invention is the purification treatment apparatus according to any one of the first to tenth aspects of the invention, wherein the dissolved oxygen supply device has an oxygen container body filled with an oxygen-containing gas pressurized to atmospheric pressure or higher. An inlet for allowing treated water taken from the purification treatment tank to flow into the oxygen container body is provided at an upper portion of the oxygen container body, and the inlet port is provided at the bottom of the oxygen container body. Is provided with an outlet for sending the treated water that has fallen to the bottom of the oxygen container body back to the purification treatment tank.
The purification treatment apparatus according to a twelfth aspect of the invention is the diffusion treatment apparatus according to the tenth or eleventh aspect of the invention, wherein a plurality of small holes are formed through the ozone container body or oxygen container body below the inlet. A plate is provided.
A purification treatment apparatus according to a thirteenth aspect is the purification treatment apparatus according to the twelfth aspect, wherein a plurality of the diffusion plates are disposed with a predetermined distance from each other, and a plurality of diffusion plates are formed penetrating the diffusion plates. At least a part of the small holes is provided at a position that does not overlap with the small holes of the adjacent diffusion plates when the treated water is dropped.
A purification treatment apparatus according to a fourteenth aspect of the present invention is the purification treatment apparatus according to any one of the first to thirteenth aspects, comprising a mineral contact material containing a mineral of a plurality of elements, and taking water from the purification treatment tank into the mineral contact material. A mineral supply device that contacts treated water, and a magnet or ceramic that applies magnetic force to the treated water that is in contact with the mineral contact material of the mineral supply device, and after the magnetic force is applied by the magnet or ceramics And a magnetic force applying device for returning treated water to the purification treatment tank.
A purification treatment apparatus according to a fifteenth aspect of the present invention is the purification treatment apparatus according to any one of the first to fourteenth aspects, further comprising a sludge storage culture tank for storing treated water taken from the purification treatment tank. The tank is configured to be able to store treated water in the purification treatment tank when the microorganism concentration exceeds a predetermined reference value.
A purification treatment apparatus according to a sixteenth aspect of the present invention is the purification treatment apparatus according to any one of the first to fourteenth aspects, wherein the sludge storage culture tank for storing the treated water and the microbial concentration of the treated water in the purification treatment tank exceed a predetermined concentration. In this case, a water intake / conveying device for concentration is provided to take in the treated water in the purification treatment tank and send it to the sludge storage culture tank.
A purification treatment apparatus according to a seventeenth aspect of the present invention is the purification treatment apparatus according to the fifteenth aspect of the invention, wherein the treated water stored in the sludge storage culture tank is taken and dropped into a pressurized oxygen-containing gas atmosphere. A dissolved oxygen supply device for a culture tank is provided that obtains water and returns the obtained dissolved oxygen treated water to the sludge storage culture tank.

FIG. 1 is a configuration diagram of a purification processing apparatus according to an embodiment of the present invention.
FIG. 2 is an enlarged partial sectional perspective view showing the oxygen dissolving apparatus.
FIG. 3 is a partial cross-sectional view schematically showing the purification treatment tank and the oxygen dissolving apparatus.
FIG. 4 is an enlarged partial cross-sectional view showing the medicinal stone tower and the magnetizing tower of the mineral magnetic device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Purification processing apparatus 2 Raw water storage tank 3 Flow volume adjustment apparatus 32 Adjustment storage tank (storage tank)
4 Purification flow path (Purification tank)
41a to 41c Purification treatment tank 41a1 Bent surface 42 Submerged film tank (a part of the purification treatment tank)
43 Stirring device (stirring assist device)
46 Water supply device (part of intake water supply device during concentration)
5 Dissolved oxygen supply devices 5A to 5C Oxygen dissolving device (part of dissolved oxygen supply device)
52 Piping (Intake pipe)
52a Pump (including intake of intake pipe)
52b Inlet 53 Sealed pressure vessel (oxygen container)
54 Piping (water pipe, part of mixing and stirring device)
54a Outlet 54b Discharge port (part of the mixing and stirring device)
56a, 56b Diffusers 56a1, 56b1 Small hole 5D Oxygen dissolving device (part of dissolved oxygen supply device for culture tank)
6 Mineral magnetic device 62 Medicinal stone tower (mineral supply device)
62c Medicinal stone (mineral contact material)
64 Magnetizing tower (Magnetic force applying device)
64c Ceramics (ceramics)
64e Magnet 7 Passing membrane device 71 Passing membrane unit (passing membrane)
8 Microorganism killing device 8A Ozone dissolving device 82 Piping (including part of water intake device, inlet)
82a Pump (part of water intake device)
83 Sealed pressure-resistant container (ozone container)
84 Piping (including part of water supply equipment, outlet)
9 Sludge storage culture tank 102 Flow rate adjustment tank (a part of the water intake and water supply device during concentration)
104 Piping (a part of the water intake system for concentration)
104a Control device (part of intake water supply device during concentration)

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. FIG. 1 is a configuration diagram of a purification treatment apparatus 1 according to the present embodiment. In the figure, the purification flow path 4 and the like are shown in cross-section, and the arrows in the figure indicate the flow of treated water in the purification treatment apparatus 1. The purification treatment apparatus 1 is for purifying water quality of polluted water (hereinafter referred to as “raw water”) 20 such as industrial wastewater contaminated with organic pollutants.
As shown in FIG. 1, a purification treatment apparatus 1 includes a raw water storage tank 2 that stores raw water 20, and a flow rate adjustment apparatus 3 that feeds raw water taken from the raw water storage tank 2 to a purification flow path 4 to be described later in a fixed amount. The purification flow path 4 for storing the water sent from the flow rate adjusting device 3, the dissolved oxygen supply device 5 for dissolving oxygen in the treated water stored in the purification flow path 4, and the purification flow path 4 The mineral magnetic device 6 for supplying mineral to the treated water and applying magnetic force, and the treated water purified by removing solids (activated sludge) from the treated water stored in the purification flow path 4 are passed. It mainly includes a passage membrane device 7, a microorganism killing device 8 that kills microorganisms contained in the treated water stored in the purification flow path 4, and a sludge storage culture tank 9 that stores surplus sludge.
The raw water storage tank 2 is a tank for storing the raw water 20 flowing in via the pipe 21 and includes a stirring device 22 as shown in FIG. The stirring device 22 includes a stirring blade that is formed so as to be rotatable and is set in the treated water, and a motor that applies a rotational driving force to the stirring blade. Stir the treated water to make the liquid concentration uniform. The raw water 20 is not limited to industrial wastewater, and may be taken from, for example, a river or a lake.
The flow rate adjusting device 3 is disposed on the downstream side of the raw water storage tank 2 and draws the raw water 20 from the raw water storage tank 2 and feeds the collected raw water 20 to the purification channel 4 described later as treated water in a fixed amount. It is a device for doing. As shown in FIG. 1, the flow rate adjustment device 3 mainly includes a flow rate adjustment tank 31 and an adjustment storage tank 32, and the flow rate adjustment tank 31 and the adjustment storage tank 32 process the purification flow path 4. It is configured to feed water in a fixed amount.
As shown in FIG. 1, the flow rate adjustment tank 31 takes the raw water 20 from the raw water storage tank 2 through the pipe 33 and the pump 33 a, and the purified water flow path 4 to be described later through the pipe 34 through the pipe 34. It is configured to supply a fixed amount continuously to each other. Further, the overflow amount exceeding the fixed amount is configured to be sent to the adjusted storage tank 32 through the pipe 35 and stored. In addition, the supply amount to the purification flow path 4 is set by the purification processing capability of the purification flow path 4 (for example, 10 tons per hour).
In the adjustment reservoir 32, in addition to the overflow raw water 20 sent from the flow rate adjustment tank 31 via the pipe 35, as shown in FIG. 1, diluted waste water 38 sent via the pipe 36, and When the treated water sent from the microorganism killing apparatus 7 to be described later through the pipe 84 is also stored, when the inflow amount of the raw water 20 from the raw water storage tank 2 to the flow rate adjustment tank 31 decreases, The stored treated water is supplied to the flow rate adjusting tank 31 through a pair of pipes 37 and a pump 37a.
Thereby, for example, even when the discharge of the raw water 20 from the factory or the like is stopped, the amount of treated water supplied to the purification flow path 4 can be kept constant, so that the operation of the purification treatment apparatus 1 is continued. It is possible to suppress a decrease in the activity of microorganisms. The diluted waste water 38 may be, for example, ground water or tap water, or the treated water 100 stored in the storage tank 101 described later as treated water after the purification treatment by the purification treatment apparatus 1 is reused. You may do it.
The purification flow path 4 is for temporarily performing the purification process while temporarily storing the treated water supplied from the flow rate adjusting tank 31 through the pipe 34, and from the upstream side (left side in FIG. 1). The purification treatment tanks 41a to 41c arranged in parallel to the downstream side (right side in FIG. 1) in a plurality of stages (three stages in total in the present embodiment), and the downstream end (right end in FIG. 1) of the purification treatment tanks 41a to 41c And a submerged film tank 42 arranged side by side.
The treated water supplied to the purification flow path 4 sequentially passes through each of the purification treatment tanks 41a to 41c, whereby the organic pollutant is decomposed by microorganisms, and solid matter (activated sludge) in the submerged film tank 42. After being removed and stored in a storage tank 101 described later, the purified treated water 100 is discharged to the environment or reused as diluted water 38.
In addition, as shown in FIG. 1, the height of the partition wall which divides each purification processing tank 41a-41c and the submerged film tank 42 is from the upstream side (left side of FIG. 1) toward the downstream side (right side of FIG. 1). The treatment water supplied to the purification flow path 4 passes through the purification treatment tanks 41a to 41c in order while passing over the partition walls (overflowing). However, you may comprise so that treated water may pass through each purification treatment tank 41a-41c in order by using piping and a pump.
A dissolved oxygen supply device 5 is installed in the purification flow path 4. The dissolved oxygen supply device 5 is for supplying oxygen by dissolving (dissolving) oxygen in the treated water stored in the purification flow path 4.
Here, as a method of supplying oxygen to treated water containing solid matter (activated sludge) containing organic pollutants and microorganisms at a high concentration, a method of generating bubbles in the treated water as in conventional purification treatment equipment. When it is adopted, as described above, various substances contained in the treated water adhere to the surface of the bubbles, so that the oxygen is not sufficiently dissolved. Therefore, the purification treatment apparatus 1 according to the present embodiment is configured to efficiently supply a certain amount of oxygen regardless of the physical properties of the treated water by adopting a method of supplying oxygen as dissolved oxygen. Yes.
That is, when the treated water is dropped into fine water droplets, the surface tension causes water to be oriented on the surface of the water droplets, while the solid matter is oriented to the center of the water droplets. Even when an organic pollutant is contained in the water, it can come into contact with more oxygen on the surface of the water droplet, so that more oxygen can be efficiently dissolved.
The dissolved oxygen supply device 5 in the present embodiment dissolves high-concentration oxygen into the treatment liquid with high efficiency in consideration of four factors of pressurization, diffusion, stagnation, and amount of water when dissolving oxygen in the treatment water. It is configured to be able to be made.
Specifically, by diffusing the treated water in an oxygen atmosphere under pressure, the treated water is dropped into fine water droplets to dissolve the oxygen in a high concentration, and the treated water stays in the container for a certain period of time. Let the excess air bubbles be removed. In this case, by supplying a large amount of treated water in the purification channel 4 into the oxygen atmosphere, the amount of dissolved oxygen in the treated water as the entire purification channel 4 can be increased.
For example, the amount of oxygen that can be dissolved in a pressurized environment is that the DO concentration (original oxygen dissolved amount) + 10 mg / L of oxygen can be dissolved. On the other hand, oxygen dissolution with a DO concentration of +10 g is possible. Therefore, when the water temperature is 20 degrees Celsius, 7.5 L or more of oxygen dissolves with respect to the amount of water of 1 ton, and up to about 35 degrees Celsius, regardless of the degree of contamination of the treated water, Oxygen corresponding to the required oxygen amount can be supplied as dissolved oxygen.
Hereinafter, the detailed configuration of the dissolved oxygen supply device 5 will be described. As shown in FIG. 1, the dissolved oxygen supply device 5 mainly includes an oxygen supply source 51 and a plurality (four in the present embodiment) of oxygen dissolving devices 5A to 5D. The oxygen dissolving devices 5A to 5C are respectively installed corresponding to the purification treatment tanks 41a to 41c, and the oxygen dissolving device 5D is installed corresponding to a sludge storage culture tank 8 described later.
As shown in FIG. 1, the oxygen dissolving apparatuses 5 </ b> A to 5 </ b> C mainly supply oxygen to the pipe 52 that pumps up the treated water from the downstream side (right side of FIG. 1) of the purification treatment tanks 41 a to 41 c and the pumped treated water. A sealed pressure vessel 53 to be melted and a pipe 54 for returning treated water in which oxygen is dissolved (high concentration oxygen-dissolved treated water) to the upstream side (left side in FIG. 1) of the respective purification treatment tanks 41a to 41c are provided.
As shown in FIG. 1, the discharge port of the pump 52 a is connected to one end of the pipe 52, and the pump 52 a is set in the treated water of the purification treatment tanks 41 a to 41 c. The other end of the pipe 52 is connected to the upper part of the sealed pressure vessel 53, and the treated water taken from the water intake port of the pump 52a is pumped into the sealed pressure vessel 53 through the pipe 52.
An oxygen supply source 51 for supplying oxygen is connected to the top of the sealed pressure vessel 53 via a pipe 55, and a control device 55 a having an adjustment valve (for example, an electromagnetic valve) is provided in the pipe 55. It has been. The control device 55a adjusts the pressure and supply amount of oxygen supplied from the oxygen supply source 51 to the sealed pressure resistant container 53, so that the dissolved oxygen content of the treated water stored in the sealed pressure resistant container 53 falls within a predetermined range. Control to keep the value of.
The oxygen supply source 51 is preferably a high-pressure oxygen cylinder into which pure oxygen is injected. When pure oxygen is used, 4.8 times as much oxygen can be dissolved in the treated water as long as the pressure conditions are the same as when air is used. The oxygen supply source 51 may be, for example, an oxygen concentrator that can extract oxygen from the atmosphere and supply the oxygen under pressure.
Here, with reference to FIG. 2, the detailed structure of oxygen dissolving apparatus 5A-5C is demonstrated. In addition, since the detailed structure of each oxygen dissolving apparatus 5A-5C is substantially the same, 5 A of oxygen dissolving apparatuses are demonstrated as a typical example here. FIG. 2 is an enlarged partial sectional perspective view showing the oxygen dissolving device 5A.
As shown in FIG. 2, the hermetic pressure vessel 53 is formed into a substantially hollow cylindrical shape with a corrosion-resistant material such as stainless steel or hard rigid resin, and is damaged even if the inside is pressurized to atmospheric pressure or higher. It has a pressure resistance so as not to occur. In addition, when comprising with a stainless steel material, it is preferable to perform the coating process by FRP etc. in the whole inside region, for oxidation prevention.
As shown in FIG. 2, the other end side of the pipe 55 whose one end side is connected to the above-described oxygen supply source 51 is connected to the substantially upper center of the sealed pressure resistant vessel 53. Therefore, when supply of oxygen from the oxygen supply source 51 is started, oxygen is supplied from the oxygen supply source 51 via the pipe 55 into the sealed pressure resistant container 53, and the supply of oxygen causes the inside of the sealed pressure resistant container 53 to be filled. The pressure is increased to atmospheric pressure or higher, that is, approximately 1 atmospheric pressure or higher.
The pressure in the sealed pressure vessel 53 is detected by a pressure detector (not shown), and the control device 55a (see FIG. 1) receives the detection result of the pressure detector from the oxygen supply source 51. By adjusting the oxygen supply amount, the pressure is adjusted to a substantially constant pressure value.
Further, as shown in FIG. 2, one end of a pipe 52 for pumping up treated water from the purification treatment tank 41a is connected to the upper right side of the sealed pressure vessel 53, and an inlet 52b of the pipe 52 is connected to the sealed pressure vessel 53 is opened toward the inside. As described above, the pump 52a (see FIG. 1) is connected to the other end of the pipe 52, and the treated water pumped up from the purification treatment tank 41a by the pump 52a is sealed from the inlet 52b of the pipe 52. It flows into the pressure vessel 53.
A treated water droplet forming means is provided at the inlet 52b of the pipe 52, and the treated water flowing into the sealed pressure resistant vessel 53 is formed into fine particles and dropped. Examples of the treated water droplet forming means include a method of partially reducing the inner diameter of the pipe 52 in a nozzle shape, and a method of covering a cover member having a plurality of small holes on the inflow port 52b. Is done.
Further, as shown in FIG. 2, a pipe 54 is provided on the left side of the upper end of the sealed pressure resistant container 53 to send the treated water stored at the bottom of the sealed pressure resistant container 53 back to the purification treatment tank 41 a (see FIG. 1). It has been. The pipe 54 extends substantially vertically toward the bottom of the sealed pressure resistant container 53, and an outlet 54 a opened at a lower end thereof with a predetermined gap from the bottom of the sealed pressure resistant container 53. Is provided.
As will be described later, the treated water stored at the bottom of the sealed pressure vessel 53 flows into the pipe 54 from the outlet 54a due to the pressure in the sealed pressure vessel 53, and the purification treatment tank 41a through the pipe 54. Sent back to. The pipe 54 is provided with a flow rate adjusting means having an adjustment valve (not shown), and the amount of treated water (high concentration oxygen-dissolved treated water) sent back from the sealed pressure resistant vessel 53 to the purification treatment tank 41a. Can be arbitrarily controlled.
On the other hand, as shown in FIG. 2, a pair of upper and lower diffusion plates 56a and 56b are disposed on the upper portion of the sealed pressure vessel 53. The pair of diffusion plates 56a and 56b are disposed at a predetermined interval below the inlet 52b of the pipe 52 described above, and a predetermined interval is also provided between the opposing surfaces of the diffusion plates 56a and 56b. Is provided. A large number of small holes 56a1 and 56b1 are formed in the diffusion plates 56a and 56b in the thickness direction.
As shown in FIG. 2, a plurality of (four in the present embodiment) projections 56a2 and 56b2 project outwardly from the outer peripheral portions of the diffusion plates 56a and 56b. 56 b is fixed to the sealed pressure vessel 53 by connecting the projections 56 a 2 and 56 b 2 to the inner peripheral surface of the sealed pressure vessel 53. Therefore, a gap is formed between the diffusion plates 56a and 56b and the inner periphery of the sealed pressure resistant container 53 by the amount of protrusion of the protrusions 56a2 and 56b2.
According to the diffuser plate 56a, the treated water dropped from the inflow port 52b described above is dropped into fine water droplets by collision with the diffuser plate 56a, and the edges of the small holes 56a1 of the diffuser plate 56a are used. Along the way, it drops downward as a large number of water droplets. The water droplets dropped from the diffusion plate 56a further drop and collide with the diffusion plate 56b, and further become finer water droplets along the edge of each small hole 56b1 of the diffusion plate 56b. Dropped to the bottom.
Also, each small hole 56a1 of one diffusion plate 56a is formed at a position that does not overlap with the position where each small hole 56b1 of the other diffusion plate 56b is viewed in the direction of water drop falling (viewed in the vertical direction in FIG. 2). Has been. Therefore, the water droplets that have passed through the small holes 56b1 of the diffusion plate 56 do not pass through the small holes 56b1 of the diffusion plate 56b but collide with the diffusion plate 56b and fall to the bottom of the sealed pressure vessel 53. As a result, finer water droplets can be obtained.
According to the oxygen dissolving apparatus 5A configured as described above, when the supply of oxygen from the oxygen supply source 51 is started via the pipe 55, the supply of oxygen causes the inside of the sealed pressure resistant container 53 to be at atmospheric pressure or higher. Pressure. Thereafter, when the treated water flows into the sealed pressure vessel 53 from the inlet 52b of the pipe 52, the treated water falls and collides with the diffusion plates 56a and 56b, and at the edges of the small holes 56a1 and 56b1. Along with it, it becomes a large number of water droplets and drops downward.
Thus, when the treated water flowing in from the inlet 52b is made into fine water droplets by the diffusion plates 56a and 56b, the contact area between the treated water flowing in from the inlet 52b and oxygen filled in the sealed pressure vessel 53 Therefore, the oxygen dissolution rate in the treated water can be improved. Moreover, since the inside of the sealed pressure resistant container 53 is pressurized by oxygen, the dissolution rate of oxygen by the treated water in the sealed pressure resistant container 53 can be further improved by such pressurization.
Thereafter, the treated water in which the oxygen stored in the sealed pressure vessel 53 is dissolved, as shown in FIG. 2, when the water level becomes higher than the outlet 54a of the pipe 54, the oxygen in the sealed pressure vessel 53 added to the water surface. Is pressed into the outlet 54a of the pipe 54 and flows out of the pipe 54 toward the purification treatment tank 41a. As a result, treated water in which oxygen is dissolved at a high concentration (high concentration dissolved oxygen treated water) is supplied to the purification treatment tank 41a. Thus, by supplying oxygen as dissolved oxygen, compared with the case where bubbling is performed as in the conventional purification treatment apparatus, an amount of oxygen sufficient to activate microorganisms is efficiently obtained, It can supply uniformly to the treated water in the purification treatment tank 41a.
In addition, as shown in FIG. 2, the case where the pipe 52 is connected to the upper right side of the sealed pressure resistant container 53 has been described. By using the diffusion plates 56a and 56b more effectively, the efficiency of dropping the treated water can be improved. Further, the case where the two diffusion plates 56a and 56b are disposed in the sealed pressure resistant container 53 has been described. However, the number of the diffusion plates may be one, or three or more. There may be. Further, the outer peripheral portions of the diffusion plates 56 a and 56 b may be in close contact with the inner peripheral surface of the sealed pressure resistant container 53 without a gap.
Returning to FIG. As shown in FIG. 1, each of the purification treatment tanks 41 a to 41 c is provided with a stirring device 43. The stirring device 43 is configured in the same manner as the stirring device 22 installed in the raw water storage tank 2 described above, and rotates the stirring blade by the rotational driving force applied from the motor, and the rotational force of the stirring blade. Thus, the treated water in each of the purification treatment tanks 41a to 41c is stirred.
Thereby, the process water which flows in through the piping 34 from the flow volume adjustment tank 31 mentioned above and the dissolved oxygen supplied from the dissolved oxygen supply apparatus 5 (oxygen dissolving apparatus 5A-5C) mentioned above are contained in high concentration. Since water and solid matter (activated sludge) containing microorganisms in each of the purification treatment tanks 41a to 41c are mixed, the contact efficiency between the microorganisms and oxygen can be improved, and the microorganisms can be activated. As a result, the purification processing efficiency in the purification flow path 4 can be improved, and solid matter containing microorganisms can be prevented from staying at the bottom of each of the purification treatment tanks 41a to 41c.
Furthermore, according to the purification treatment apparatus 1 of the present invention, not only mechanical agitation by the rotational force of the agitation device 43 but also each purification using the water flow of the treated water supplied from the dissolved oxygen supply device 5 described above. An agitation method for efficiently agitating the treated water by forming forced movement of the treated water in the treatment tanks 41a to 41c is also employed. Here, the stirring method using this water flow is demonstrated with reference to FIG.
FIG. 3 is a partial cross-sectional view schematically showing the purification treatment tank 41a and the oxygen dissolving device 5A. In addition, illustration of the stirring apparatus 43, piping 34, 103, etc. is abbreviate | omitted in the figure.
Here, since each purification treatment tank 41a-41c and each oxygen dissolution apparatus 5A-5C are comprised similarly, the structure is demonstrated by making the purification treatment tank 41a and the oxygen dissolution apparatus 5A into a representative example.
As shown in FIG. 2, the pipe 52 for pumping the treated water of the purification treatment tank 41a to the sealed pressure resistant vessel 53 has a water intake port of a pump 52a connected to one end thereof set at a substantially intermediate position of the water depth of the purification treatment tank 41a. It is comprised so that. On the other hand, the pipe 54 for returning the treated water in which the oxygen in the sealed pressure resistant vessel 53 is dissolved to the purification treatment tank 41a extends to a position lower than the pump 52a toward the bottom of the purification treatment tank 41a, and its end portion. Is formed so as to be inclined toward the substantially central portion of the bottom of the purification treatment tank 41a, and the tip of the inclined portion serves as a discharge port 54b.
Therefore, when the treated water in which the oxygen in the sealed pressure resistant vessel 53 is dissolved is discharged into the purification treatment tank 41a from the discharge port 54b of the pipe 54, the treated water discharged from the discharge port 54b is stored in the purification treatment tank 41a. Since a substantially horizontal water flow can be formed along the bottom and the treated water in the purification treatment tank 41a can be forcibly moved, the treated water is efficiently stirred to treat the treated water, dissolved oxygen and microorganisms. Mixing with the containing solid substance (activated sludge) can be performed reliably. As a result, the distribution of microorganisms in the purification treatment tank 41a can be made uniform, and the purification treatment efficiency can be improved.
In addition, as shown in FIG. 3, the purification treatment tank 41a has a bent surface 41a1 formed on the entire periphery of the bottom peripheral edge thereof, so that the treated water in the purification treatment tank 41a is agitated and the water flows along the bottom. Is formed, the water flow of the treated water at the peripheral edge of the bottom (bending surface 41a1) can be made to flow smoothly. Therefore, since it can suppress that the solid substance (active sludge) containing a microorganisms remains without stirring in a peripheral part of a bottom part, and improvement of stirring efficiency can be aimed at, distribution of microorganisms in purification processing tank 41a is made more. It can be made uniform and the purification efficiency can be further improved.
The discharge port 54b of the pipe 54 is configured such that the discharge direction is directed from the upstream side of the purification treatment tank 41a to the substantially central portion of the bottom (see FIG. 1), but is directed from the downstream side to the substantially central portion of the bottom portion. You may make it do. In addition, the pump 52a of the pipe 52 is set near the partition wall on the side away from the discharge port 54b of the pipe 54 in the purification treatment tank 41a, but may be set near the discharge port 54b of the pipe 54. . Thereby, it can suppress that the pump 52a of the piping 52 takes in directly the treated water discharged from the discharge outlet 54b of the piping 54, and not fully mixed in the purification treatment tank 41a.
Further, the bottom peripheral edge portion of the purification treatment tank 41a is formed by bending the bent surface 41a1 in an arc shape in cross section, but it may be formed by bending on a plane, or a combination thereof. May be. The size (degree of bending) of the bent surface 41a1 is preferably changed as appropriate according to physical properties such as the capacity of the purification treatment tanks 41a to 41c, the configuration of the stirring device, the shearing force, and the viscosity of the treated water to be stirred.
Returning to FIG. Water purification devices 44 and 45 are provided in the second and third purification treatment tanks 41b and 41c in the purification flow path 4, as shown in FIG. The water supply device 44 is a device for returning the treated water in the purification treatment tank 41b back to the first-stage purification treatment tank 41a, and the water supply device 45 is the second-stage purification treatment of treated water in the purification treatment tank 41c. It is an apparatus for sending it back to the tank 41b. These water feeding devices 44 and 45 are pumps set in the purification treatment tanks 41b and 41c, and pipes for supplying treated water taken by the pumps to the purification treatment tanks 41a and 41b on the upstream side (left side in FIG. 1). Each is equipped.
According to these water feeding devices 44 and 45, the treated water in the purification flow path 4 is transferred from the purification treatment tanks 41b and 41c on the downstream side (right side in FIG. 1) to the purification treatment tanks 41a and 41b on the upstream side (left side in FIG. 1). Since it can be sent back and purified again, even if it is wastewater containing organic pollutants at a high concentration, it can be sufficiently purified in a limited installation space and is paralleled. The processing density of the plurality of purification treatment tanks 41a to 41c can be made uniform.
In addition, in FIG. 1, in order to simplify drawing and to make it easy to understand, the pump of the water supply apparatus 44 is disposed at a substantially central position in the passing direction of the treated water (the left-right direction in FIG. 1) in the purification treatment tank 41b. Although the discharge side of the piping is arranged on the most downstream side of the purification treatment tank 41a, the pump of the water supply device 44 is arranged on the most downstream side (right side in FIG. 1) of the purification treatment tank 41b, and the piping discharge side of the water supply device 44 Is more preferably arranged on the most upstream side (left side in FIG. 1) of the purification treatment tank 41a. The same applies to the water supply device 45. Thereby, since the passage time of the treated water passing through the purification flow path 4 is lengthened, the activity time by the microorganism can be increased correspondingly, and the purification treatment of the treated water by the microorganism is further promoted. be able to.
A mineral magnetic device 6 is installed in the second-stage purification treatment tank 41 b in the purification flow path 4. The mineral magnetic device 6 includes a pipe 61 that pumps up treated water from the upstream side (left side in FIG. 1) of the purification treatment tank 41b, and one end side of the pipe 61 is inserted into the purification treatment tank 41b. The pipe 61 is provided with a pump 61a. By operating the pump 61a, the treated water in the purification treatment tank 41b is supplied to the medicinal stone tower 62 and the magnetizing tower 64 via the pipe 61, and the minerals are supplied. After being supplied and magnetic force is applied, it is sent back to the downstream side (right side in FIG. 1) of the purification treatment tank 41b via the pipe 65.
Here, with reference to FIG. 4, the detail of the medicinal tower 62 and the magnetizing tower 64 of the mineral magnetic device 6 is demonstrated. FIG. 4 is a partial cross-sectional view showing the medicinal tower 62 and the magnetizing tower 64 of the mineral magnetic device 6 in an enlarged manner. In FIG. 4, a part of the mesh of the reticulate body constituting the medicinal stone cage 62 d, a part of the many medicinal stones 62 c accommodated in the medicinal stone cage 24 d, and one of the many ceramic materials 64 c filled in the magnetizing tower 64. The part is not shown in the figure.
As shown in FIG. 4, the medicinal stone tower 62 includes a tower main body 62a connected to the pipe 62 described above, a canopy plate 62b covered on the upper part of the tower main body 62a, a medicinal stone 62c installed on the tower main body 62a, A drug stone basket 62d that accommodates the drug stone 62c is mainly provided.
As shown in FIG. 4, the tower main body 62a is formed in a substantially cylindrical shape from a corrosion-resistant material such as stainless steel or hard synthetic resin, and has an open surface for inserting the medicinal stone basket 62d in the upper part thereof. Is formed. This open surface is sealed by a canopy plate 62b formed of a corrosion-resistant material such as stainless steel or hard synthetic resin. A packing made of a synthetic resin material such as silicon sponge is sandwiched between the canopy plate 62b and the tower main body 62a to prevent the treated water that passes through the stone tower 62 from leaking to the outside. ing.
As shown in FIG. 4, the other end side of the pipe 55 into which the one end side is inserted into the purification treatment tank 41b is connected to the lower part (lower side in FIG. 4) of the tower main body 62a, and the other end side is connected to the tower main body 62a. It communicates with an inflow port 62a1 formed in the outer peripheral wall. The inflow port 62 a 1 is an opening for allowing the treated water transferred by the pipe 62 to flow into the tower main body 62 a of the stone tower 62. In addition, the mesh material comprised by the net-like body is adhering to this edge 62a1 at the edge.
As shown in FIG. 4, a pipe 63 is connected to the upper portion (upper side of FIG. 4) of the tower main body 62 a for transferring the treated water that has passed through the medicated stone tower 62 to the magnetizing tower 64 described later. One end side (right side in FIG. 4) of this pipe 63 communicates with an inlet 64a2 drilled in the outer peripheral wall of the magnetizing tower 64 described later, and the other end side (left side in FIG. 4) is the outer periphery of the tower main body 62a. It communicates with the outlet 62a2 drilled in the wall. The outflow port 62a2 is an opening for allowing the treated water that has passed through the stone tower 62 to flow out to the magnetizing tower 64 described later. Moreover, the mesh material comprised by the net-like body is adhering to the edge of the outflow port 62a2 similarly to the inflow port 62a1 mentioned above.
Inside the tower main body 62a, as shown in FIG. 4, there are a plurality of stages (three stages in the present embodiment) of a medicinal stone basket 62d containing a number of medicinal stones 62c made of natural stones containing minerals of a plurality of elements. Are stacked. The medicinal stone 62c is for supplying minerals of a plurality of elements to the treated water passing through the medicinal stone tower 62, and a plurality of natural stones constituting the medicinal stone 62c can be ionized (ionized) and dissolved in the treated water. Contains elemental minerals. Therefore, when the treated water passing through the medicinal stone tower 62 comes into contact with the medicinal stone 62c, it is possible to dissolve the minerals of a plurality of elements in the treated water in an ionized state.
By the way, said medicinal stone 62c is, for example, silicon (Si), aluminum (Al), potassium (K), sodium (Na), iron (Fe), calcium (Ca), magnesium (Mg), titanium (Ti), Manganese (Mn), sulfur (S), phosphorus (P), zinc (Zn), lead (Pb), chromium (Cr), barium (Ba), zirconium (Zr), strontium (Sr), rubidium (Rb), Yttrium (Y) is the main component.
As shown in FIG. 4, each drug stone cage 62 d is formed in a net-like body with a corrosion-resistant material such as stainless steel material or hard synthetic resin, and the above-described many drug stones 62 c are accommodated therein. . Therefore, the treated water that has flowed into the tower main body 62a from the inlet 62a1 flows into the drug stone cage 62d from the mesh of the mesh body that constitutes each drug stone cage 62d, and the drug stone 62c accommodated in the drug stone basket 62d. By passing through the gap, it is possible to contact these drug stones 62c.
Next, as shown in FIG. 4, the magnetizing tower 64 passes through the tower main body 64a connected to the stone tower 62 via the pipe 63, a canopy plate 64b covering the tower main body 64a, and the tower main body 64a. The magnetic force is applied to the treated water that passes through the tower body 64a together with the ceramic material 64c and the ceramic material 64c filled in the tower body 64a in order to apply magnetic force to the treated water and supply minerals of a plurality of elements. It mainly includes a support member 64d that supports a plurality of magnets 64e to be applied.
As shown in FIG. 4, the tower main body 64a is formed in a substantially cylindrical shape from a corrosion-resistant material such as stainless steel or hard synthetic resin, and an open surface for inserting the ceramic 64c is formed on the upper part. Has been. This open surface is sealed with a canopy plate 64b formed of a corrosion-resistant material such as stainless steel or hard synthetic resin. A packing made of a synthetic resin material such as silicon sponge is sandwiched between the canopy plate 64b and the tower main body 64a to prevent leakage of treated water passing through the magnetizing tower 64 to the outside. ing.
As described above, the pipe 63 communicates with the inlet 64a1 formed in the upper part of the tower main body 64a. The inflow port 64a4 is an opening for allowing the treated water that has passed through the medicated stone tower 62 to flow into the tower main body 64a of the magnetizing tower 64. In addition, the mesh material comprised by the net-like body is adhering to the edge of the inflow public 64a1.
Further, the pipe 63 is connected to the back side surface (the back side surface in FIG. 4) of the outer peripheral wall of the tower main body 64a, and the treated water that has flowed into the inlet 64a1 turns while turning along the inner wall of the tower main body 64a. 64a is made to flow down (lower). Therefore, the treated water that has flowed into the tower main body 64a turns clockwise (clockwise) along the inner wall of the tower main body 64a when the inside of the tower main body 64a is viewed from above (as viewed from the upper side in FIG. 4). While flowing down. In this way, by passing the treated water that has flowed into the tower main body 64a through the tower main body 64a while swirling, the treated water is simply caused to flow substantially vertically from the upper part to the lower part of the tower main body 64a. The passing distance when such treated water passes through the tower body 64a can be increased.
For this reason, since the application time of the magnetic force to the treated water passing through the inside of the tower main body 64a by the plurality of ceramic materials 64c and the magnets 64e is increased, the magnetization of the treated water passing through the inside of the tower main body 64a due to the increase in such time. The activity can be promoted. In addition, the contact time between the treated water and the ceramic material 64c is increased by swirling the treated water passing through the tower body 64a, and accordingly, the multi-element minerals to the treated water passing through the tower body 64a are correspondingly increased. Addition can be facilitated.
In addition, by swirling the treated water passing through the tower main body 64a as described above, the properties of the treated water have a positive effect on the living organism such as, for example, the property that it is difficult to rot and the activity of the organism is activated. It is changed to the nature to give.
When the water purification device 1 is installed in the northern hemisphere, the magnetizing tower 64 is clockwise (rightward) in the tower main body 64a when treated water flowing into the tower main body 64a is viewed from above (as viewed from the upper side in FIG. 4). When the water purification apparatus 1 is installed in the southern hemisphere, the treated water flowing into the tower main body 64a is counterclockwise in the tower main body 64a as viewed from above (when the water purification device 1 is installed in the southern hemisphere). It is configured to flow down while turning counterclockwise.
As shown in FIG. 4, a pipe 65 for returning the treated water that has passed through the magnetizing tower 64 to the purification treatment tank 41b is connected to the lower portion of the tower body 64a. One end of the pipe 63 is inserted into the purification treatment tank 41b (see FIG. 1), and the other end (left side in FIG. 4) communicates with an outlet 64a2 drilled in the outer peripheral wall of the tower body 64a. Yes. The outlet 64 a 2 is an opening for allowing the treated water that has passed through the magnetizing tower 64 to flow out to the pipe 65. In addition, the mesh material comprised by the net-like body is adhering to the edge of the outflow port 64a2 similarly to the inflow port 64a1 mentioned above.
The tower body 64a is filled with a plurality of ceramic materials 64c formed in a substantially spherical shape by baking and hardening a material containing minerals of a plurality of elements. The plurality of ceramic materials 64c are magnetized by baking and solidifying a material containing minerals of a plurality of elements, and magnetic properties are generated in the treated water passing through the tower body 64a by the magnetism of the plurality of ceramic materials 64c. Power can be granted.
The ceramic material 64c also supplies minerals of a plurality of elements to the treated water that passes through the magnetization tower 64. That is, the ceramic material 64c contains a multi-element mineral that can be ionized (ionized) and dissolved in the treated water. Therefore, when the treated water passing through the inside of the magnetizing tower 64 comes into contact with the ceramic material 64c, the minerals of a plurality of elements can be dissolved in the treated water in an ionized state. The ceramic material 64c contains a multi-element mineral having substantially the same components as the above-described medicinal stone 62c.
Further, a substantially rod-shaped support member 64d is erected in the tower main body 64a of the magnetizing tower 64 from the substantially central portion of the bottom plate toward the canopy plate 64b. The support member 64d is for supporting a plurality of magnets 64e while being arranged in parallel at substantially equal intervals from the bottom plate side (lower side in FIG. 4) of the tower body 64a to the canopy plate 64b. The plurality of magnets 64e supported by the support member 64d are each composed of a substantially donut-shaped permanent magnet having a circular opening formed in the approximate center thereof, and the support member 64d is inserted into the opening.
According to the plurality of magnets 64e supported by the support member 64d, a plurality of elements ionized by the treated water whose magnetic force passes through the magnetizing tower 64, that is, the medicinal stone 62c of the medicinal tower 62 and the ceramic material 64c of the magnetizing tower 64. By acting on (providing to) the treated water supplied with minerals, it is possible to promote the decomposition of organic substances by microorganisms suitable for decomposing organic substances contained in the treated water and the propagation of such microorganisms. Further, the plurality of magnets 64e are substantially equalized by the support member 64d from the bottom plate 43a1 side of the tower body 64a toward the canopy board 64b, that is, in the descending direction (substantially vertical direction) of the treated water passing through the tower body 64a. The magnets 64e are arranged side by side, so that magnetic force can be exerted strongly on the water swirling and descending in the tower main body 64a.
Returning to FIG. As shown in FIG. 1, the pipe 65 whose one end is connected to the magnetizing tower 64 has the other end inserted into the downstream side of the purification treatment tank 41 b. Accordingly, the treated water to which the mineral is supplied by the mineral magnetic device 6 and to which the magnetizing force is applied is sent back from the mineral magnetic device 6 to the purification treatment tank 41b through the pipe 65.
The treated water supplied to the purification flow path 4 and sequentially passing through the purification treatment tanks 41a to 41c finally reaches the submerged film tank 42 located on the most downstream side (right side in FIG. 1) of the purification flow path 4. To do. As shown in FIG. 1, the submerged membrane tank 42 is mainly provided with a passage membrane device 7, a microorganism killing device 8, and a water feeding device 46.
The passage membrane device 7 is configured as a solid-liquid separation means that passes the purified treated water by removing solids (activated sludge) from the treated water stored in the submerged membrane tank 42, and the treated water. Is mainly provided with a passage membrane unit 71 that filters the passage membrane unit 71, a cleaning device 72 that cleans the passage membrane unit 71, and a pipe 73 that feeds treated water that has passed through the passage membrane unit 71 to the storage tank 101.
The passage membrane unit 71 is configured by setting a number of membrane elements (not shown) in which a large number of minute passage holes are formed in a membrane case (not shown). As shown in FIG. The submerged membrane tank 42 is submerged in the treated water. In the present embodiment, the average inner diameter of the through holes formed in the membrane element is approximately 0.4 μm.
The cleaning device 72 is for supplying compressed air to the passage membrane unit 71, and one end thereof is connected to the lower portion (lower side in FIG. 1) of the passage membrane unit 71. A blower as a blower is connected to the other end of the cleaning device 72. By operating this blower, compressed air is blown from the lower part of the passage membrane unit 71, and the membrane case of the passage membrane unit 71. It is configured to generate a large amount of bubbles therein. Therefore, since the bubbles come into contact with the surface of the membrane element and rise while giving vibration and impact, solid matter containing microorganisms is washed away, and clogging of the membrane element is prevented.
Moreover, as shown in FIG. 1, a pipe 73 is connected to the upper part of the passage membrane unit 71. A pump 73 a is interposed in the pipe 73. By operating this pump 73 a, the treated water filtered by the membrane element of the passage membrane unit 71 is drawn out, and the extracted treated water is passed through the pipe 73. Thus, the water can be supplied to the storage tank 101.
As a result, the treated water in the submerged membrane tank 42 passes through the membrane element of the passage membrane unit 71, so that the solid matter (active sludge) containing microorganisms is removed, and is transferred to the storage tank 101 by the pipe 73 and the pump 73a. Water is sent and stored. Then, the purified treated water 100 is, for example, discharged to the environment or sent back to the above-described adjusted storage tank 32 to be reused as the diluted waste water 38. Further, the solid matter (activated sludge) containing the microorganisms removed by the passage membrane unit 71 is discharged into the submerged membrane tank 42.
The microorganism killing device 8 is a device for killing the microorganisms removed by the passage membrane device 7 described above and released into the submerged membrane tank 42 and reusing it as a supplementary nutrient source, as shown in FIG. These are installed in the submerged membrane tank 42 together with the above-described passage membrane device 7. The microorganism killing apparatus 8 mainly includes an ozone generator 81 and an ozone dissolving apparatus 8A.
As shown in FIG. 1, the ozone dissolving apparatus 8A includes a pipe 82 for pumping up treated water from the submerged membrane tank 42, a sealed pressure vessel 83 for dissolving ozone by dissolving ozone in the pumped treated water, and its The pipe 84 mainly supplies the treated water after the microorganisms are killed to the adjusted storage tank 32.
As shown in FIG. 1, the discharge port of the pump 82 a is connected to one end of the pipe 82, and the pump 82 a is set in the treated water of the submerged membrane tank 42. The other end of the pipe 82 is connected to the upper portion of the sealed pressure vessel 83, and the treated water taken from the water intake port of the pump 82a is pumped into the sealed pressure vessel 83 through the pipe 82.
An ozone generator 81 that generates ozone gas is connected to the top of the sealed pressure vessel 83 via a pipe 85. The pipe 85 is provided with a control device 85a having an adjustment valve (for example, an electromagnetic valve). It has been. The control device 85a adjusts the pressure and supply amount of ozone gas supplied from the ozone generator 81 to the sealed pressure resistant vessel 83, and sets the amount of ozone gas dissolved in the treated water stored in the sealed pressure resistant vessel 83 to a predetermined value. Control to keep the value within the range.
The pressure in the sealed pressure vessel 83 is detected by a pressure detector (not shown), and the control device 85a adjusts the amount of ozone gas supplied from the ozone generator 81 in response to the detection result of the pressure detector. Thus, the pressure is adjusted to a substantially constant pressure value equal to or higher than atmospheric pressure, that is, approximately equal to or higher than 1 atmosphere. In addition, as an ozone production | generation mechanism by the ozone generator 81, you may employ | adopt any of the well-known mechanisms using a photochemical reaction, an electrolytic reaction, a discharge reaction, a radiation reaction etc., for example.
Here, the ozone dissolving device 8A is configured substantially the same as the oxygen dissolving devices 5A to 5C (see FIG. 2) described above. Therefore, in the following, a detailed configuration of the ozone dissolving apparatus 8A will be described with reference to FIG.
The sealed pressure vessel 83 in the ozone dissolving device 8A is formed in a substantially hollow cylindrical shape with a material having corrosion resistance such as stainless steel material and hard rigid resin, like the sealed pressure vessel 83 in the oxygen dissolving device 5A described above. In addition, it is configured to have pressure resistance so as not to be damaged even if the inside is pressurized to atmospheric pressure or higher (see FIG. 2).
As in the case of the inlet 52b of the pipe 52 in the oxygen dissolving apparatuses 5A to 5C described above, treated water droplet forming means is provided at the inlet of the pipe 52 in the ozone dissolving apparatus 8A and flows into the sealed pressure vessel 83. It is comprised so that treated water may be dropped into fine particles and fall (see FIG. 2).
Moreover, the piping 84 in the ozone dissolving device 8A is extended substantially perpendicularly toward the bottom of the sealed pressure vessel 83 in the same manner as the piping 54 in the oxygen dissolving devices 5A to 5C described above. An outlet opening is provided between the bottom of the pressure vessel 83 and a predetermined interval (see FIG. 2).
Therefore, the treated water stored at the bottom of the sealed pressure resistant vessel 83 flows into the pipe 84 by the pressure in the sealed pressure resistant vessel 83 as in the case of the oxygen dissolving apparatuses 5A to 5C described above. Then, the water is fed to the flow rate adjustment tank 32. The pipe 84 is provided with a flow rate adjusting means having an adjustment valve (not shown) so that the amount of treated water supplied from the sealed pressure vessel 83 to the flow rate adjusting tank 32 can be arbitrarily controlled. Yes.
Further, the sealed pressure vessel 83 is provided with a pair of upper and lower diffusion plates configured in the same manner as the diffusion plates 56a and 56b of the oxygen dissolving devices 5A to 5C described above. A predetermined interval is also provided between the opposing surfaces of both diffusion plates. Similar to the diffusion plates 56a and 56b in the oxygen dissolving devices 5A to 5C, these diffusion plates are provided with a large number of small holes and projecting portions on the outer peripheral portion (see FIG. 2).
According to the ozone dissolving apparatus 8A configured as described above, when the supply of ozone gas from the ozone generator 81 is started via the pipe 85, the supply of the ozone gas causes the inside of the sealed pressure resistant vessel 83 to be at atmospheric pressure or higher. Pressure. Thereafter, when the treated water flows into the sealed pressure resistant vessel 83 from the inlet of the pipe 82, the treated water falls and collides with the diffusion plate and becomes a large number of water droplets along the edge of each small hole. And dripped downward.
Thus, when the treated water that has flowed in from the inlet is made into fine water droplets by the diffusion plate, the contact area between the flowed treated water and the ozone gas filled in the sealed pressure resistant vessel 83 is increased, and thus The dissolution rate of ozone gas by the treated water can be improved, and the inside of the sealed pressure resistant vessel 83 is pressurized by the ozone gas, so that the ozone gas dissolution rate by the treated water in the sealed pressure resistant vessel 83 is increased by such pressurization. Further improvement can be achieved. As a result, microorganisms in the treated water can be efficiently killed.
Thereafter, the treated water in which microorganisms are killed is stored at the bottom of the sealed pressure vessel 83, and when the water level becomes higher than the outlet of the pipe 84, the pressure of the ozone gas in the sealed pressure vessel 83 applied to the water surface causes the pipe 84 to be discharged. As shown in FIG. 1, the water is fed into the adjusted storage tank 32 through the pipe 84. The treated water sent to the adjusted storage tank 32 is supplied from the flow rate adjusting tank 31 to the purification flow path 4 via the pipe 34 as a supplementary nutrient source.
In this way, after taking treated water from the submerged membrane tank 42 and killing microorganisms in the treated water, the microorganisms are activated and purified by sending them back to the purification flow path 4 as supplementary nutrient sources. The purification efficiency in the flow path 4 can be further improved.
Further, even when microorganisms in the purification channel 4 grow beyond the allowable range, some of the microorganisms are killed and decomposed as a nutrient source, so that other microorganisms can be activated while the purification channel 4 is activated. At the same time, the solid matter (activated sludge) containing microorganisms in 4 can be reduced, and as a result, the discharge amount of waste such as sludge residue after the treatment as the entire purification treatment apparatus 1 can be reduced.
In addition, the water supply destination by the piping 84 of the treated water in which microorganisms were killed by the ozone dissolving apparatus 8A is not necessarily limited to the adjusted storage tank 32. For example, instead of the adjusted storage tank 32 or along with the adjusted storage tank 32, purification is performed. The flow path 4 (purification process tank 41a-41c) may be sufficient.
The water feeding device 46 is a device for sending the treated water in the submerged membrane tank 42 back to the purification treatment tank 41a, the adjustment storage tank 32, and the sludge storage culture tank 9, and as shown in FIG. 7 and the microorganism killing device 8 are installed in the submerged membrane tank 42. The water feeding device 46 includes a pump that is set in the submerged membrane tank 42, and is configured to feed the treated water taken by the pump to a flow rate adjusting tank 102 described later.
As shown in FIG. 1, the flow rate adjusting tank 102 continuously supplies the treated water fed from the water feeding device 46 to each of the purification treatment tank 41 a and the adjusted storage tank 32 through the pipes 103 and 104. It is configured. Therefore, the treated water in the purification flow path 4 is sent back from the submerged film tank 42 on the downstream side (right side in FIG. 1) to the purification treatment tank 41a on the upstream side (left side in FIG. 1) to perform the purification process again. Therefore, even in wastewater containing organic pollutants at a high concentration, sufficient purification treatment can be performed in a limited installation space, and the treatment density of the purification flow path 4 in which a plurality of tanks are arranged in parallel Can be made uniform.
Here, when the microorganism is used for purification of the treated water as in the purification treatment apparatus 1 in the present embodiment, the growth of a certain microorganism is unavoidable in the purification treatment process, and this is caused by the growth of the microorganism. It is necessary to prevent deterioration in workability due to non-uniform treatment, a reduction in treatment efficiency, or an increase in solid matter (activated sludge) containing microorganisms. Therefore, solid matter (activated sludge) containing microorganisms is periodically discharged as excess sludge by interlocking with the numerical value calculated by the activated sludge concentration (hereinafter referred to as “MLSS concentration”) in the purification flow path 4. It is preferable to do.
Therefore, the purification treatment apparatus 1 of the present embodiment is provided with an MLSS concentration meter (not shown) for measuring the MLSS concentration in the submerged membrane tank 42, and the concentration calculated by the MLSS concentration meter is a predetermined set value. The excess sludge is configured to be discharged from the submerged membrane tank 42 to the sludge storage culture tank 9.
Specifically, as shown in FIG. 1, the sludge storage culture tank 9 is configured such that treated water taken from the submerged film tank 42 is fed through the flow rate adjustment tank 102 and the pipe 104. The piping 104 is provided with a control device 104a having an electromagnetic adjustment valve. When the measurement result by the MLSS densitometer exceeds a predetermined set value (the concentration is high), the control device 104a opens the pipe 104 and feeds treated water from the submerged membrane tank 42, while MLSS When the measurement result by the densitometer is lower than a predetermined set value (concentration is low), the piping 104 is blocked and control is performed to prohibit the supply of treated water from the submerged membrane tank 42.
As a result, since only the treated water in the submerged membrane tank 42 is stored in the sludge storage culture tank 9 when the MLSS concentration exceeds a predetermined set value, the treated water stored in the sludge storage culture tank 9 is stored. The solid (active sludge) containing the microorganisms inside can be made into a concentrated state. Therefore, since the treated water in a concentrated state, that is, surplus sludge can be taken out from the sludge storage culture tank 9, the surplus sludge can be dehydrated or discarded as it is. Therefore, unlike the conventional purification treatment apparatus, it is not necessary to separately provide a sludge settling tank or a sludge concentration tank in order to take out excess sludge, so that it is possible to reduce the cost in terms of facilities and space.
In addition, as shown in FIG. 1, the sludge storage culture tank 9 is provided with a pipe 91 and a pump 91a, and treated water (excess sludge) stored in the sludge storage culture tank 9 by the pipe 91 and the pump 91a. ) Is sent to the compression tank 92 which is the next stroke.
In addition, as shown in FIG. 1, the sludge storage culture tank 9 is provided with a stirring device 93 that rotates the stirring blade by a rotational driving force applied from a motor to stir the treated water, and the dissolved oxygen supply device 5. The oxygen dissolving apparatus 5D is installed so that the treated water pumped from the sludge storage culture tank 9 is sent back as treated water in which oxygen is dissolved (high-concentration oxygen-dissolved treated water).
As a result, even if the treated water in the sludge storage culture tank 9 is concentrated as described above, oxygen is supplied to the microorganisms contained in the treated water in the sludge storage culture tank 9 to activate the activity. Therefore, the generation of malodor can be suppressed. Since the oxygen dissolving device 5D is configured in the same manner as the oxygen dissolving devices 5A to 5C described above, the same reference numerals as those of the oxygen dissolving devices 5A to 5C are attached to the respective components, and the description thereof is omitted.
Here, whether or not the treated water is sent from the submerged membrane tank 42 to the sludge storage culture tank 9 is automatically determined by the control device 104a opening or shutting off the pipe 104 based on the measurement result of the MLSS densitometer. However, it may be configured such that the operator manually performs the switching operation of opening and shutting off the pipe 104.
Thus, according to the purification treatment apparatus 1 in the present embodiment, the supply of oxygen to the treated water can be performed in the form of dissolved oxygen, so that the treatment includes a high concentration of organic pollutants and a large amount of solid matter. Purification efficiency can also be improved by supplying a sufficient amount of oxygen to water to promote the activation of microorganisms. Furthermore, even if solids in the treated water increase with the activation of microorganisms, part of the microorganisms in the treated water can be killed and sent back into the treated water as a supplemental nutrient source. In addition, it is possible to simultaneously reduce the amount of solids in the treated water while activating other microorganisms.
The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily guessed.
For example, in the purification processing apparatus 1 according to the present embodiment, the case where the three stages of purification treatment tanks 41a to 41c are installed in the purification flow path 4 has been described. However, the number of installation stages is not necessarily limited to three. It is preferable to increase / decrease as appropriate according to the purification treatment conditions of the treated water.

According to the purification treatment apparatus of the first invention, since the dissolved oxygen supply device is provided, oxygen supply to the treated water in the purification treatment tank can be performed with dissolved oxygen. Therefore, a sufficient amount of oxygen can be supplied to the treated water even in the case of treated water containing a high concentration of organic pollutants and containing a large amount of solids. There is an effect that the purification efficiency can be improved.
In addition, it is equipped with microorganism killing means, and the killed microorganisms can be sent back to the treatment water of the purification tank as a supplementary nutrient source, thereby promoting the activation of microorganisms and further improving the purification efficiency. There is an effect that can be. Furthermore, even if solids in the treated water increase with the activation of microorganisms, some of the microorganisms are killed by the microorganism killing means and decomposed as nutrient sources, thus promoting the activation of other microorganisms However, there is an effect that a reduction in the amount of solids in the treated water can be achieved at the same time.
As a result, even in the case of wastewater containing organic pollutants at a high concentration, clogging of the passage membrane can be prevented by reducing the solid matter described above, so that the passage membrane (passage membrane device) can be used as a solid-liquid separation means. There is an effect that it can be used. Therefore, the installation of a large-scale sludge settling tank or the like required by the conventional purification treatment apparatus can be made unnecessary, so that the cost of equipment and space can be reduced accordingly. is there.
According to the purification treatment apparatus of the second invention, in addition to the effects exhibited by the purification treatment apparatus of the first invention, the microorganism killing apparatus is configured to dissolve the ozone in the treated water taken from the purification treatment tank and kill the microorganisms. Therefore, the microorganisms in the treated water can be efficiently killed, and the microorganisms can be killed while maintaining the state as a supplementary nutrient source for other microorganisms. As a result, killed microorganisms can be sent back to the purification treatment tank and decomposed into other microorganisms, so that improvement of purification treatment efficiency by activation of microorganisms and reduction of solids in the treated water can be achieved simultaneously. There is an effect that can be done.
According to the purification treatment apparatus of the third invention, in addition to the effects exhibited by the purification treatment apparatus of the second invention, the water supply device of the microorganism killing means is from a water intake position where the water intake device for taking the treated water after the microorganism killing takes the treated water. Is also configured to send back to the upstream side of the purification tank, so that the activation of microorganisms can be promoted and the supply destination of microorganisms after killing as a supplementary nutrient source is prevented from being biased to a part. Thus, there is an effect that the purification treatment in the purification treatment tank can be made uniform.
According to the purification treatment apparatus of the fourth invention, in addition to the effect exhibited by the purification treatment apparatus of the second or third invention, the supply amount of the treated water supplied to the purification treatment tank by the supply amount adjusting device is set to a constant amount. That is, since the supply amount according to the treatment capacity of the purification treatment tank can be maintained, it is possible to prevent the treatment load from becoming excessive and to carry out the purification treatment with the optimum treatment efficiency stably. There is an effect that can be done.
Here, the supply amount adjusting device includes a storage tank, and when the waste water is larger than a certain amount to be supplied to the purification treatment tank, the waste water is stored in the storage tank and the waste water is supplied to the purification treatment tank. When the amount is smaller than the predetermined amount, the waste water stored in the storage tank is supplied as the treatment water, thereby adjusting the treatment water supplied to the purification treatment tank to a certain amount. And the water supply apparatus of the microorganism killing apparatus is configured to send the treated water after the microorganism killing back to the storage tank of the supply amount adjusting apparatus.
As a result, when the amount of wastewater supplied is greater than a certain amount, the treated water after microbial killing is stored in a storage tank, so that organic pollutants contained in the wastewater and microbial killing as a supplementary nutrient source can be stored. Since it is possible to prevent the treated water from being stacked and supplied to the purification treatment tank, the treatment water in the purification treatment tank is prevented from becoming over-nutritioned and the activity of microorganisms is inhibited. There is an effect that can be done.
On the other hand, when the supply amount of waste water is less than a certain amount, the treated water stored in the storage tank, that is, the treated water after killing the microorganisms can be supplied to the purification tank as a supplementary nutrient source. There is an effect that the treatment water in the purification treatment tank can be prevented from becoming in a nutrient-deficient state, and the stagnation of the activity of microorganisms can be suppressed.
According to the purification treatment apparatus of the fifth invention, in addition to the effects exhibited by any of the purification treatment apparatuses of the first to fourth inventions, the water supply pipe of the dissolved oxygen supply device has a discharge port with respect to the bottom of the purification treatment tank. Therefore, even when wastewater containing organic pollutants at high concentrations is discharged, the dissolved oxygen-treated water is discharged. Thus, there is an effect that a water flow is formed in the purification treatment tank, and the purification treatment tank can be efficiently stirred. As a result, it is possible to efficiently achieve the activation of the microorganisms and the uniformization of the purification treatment by sufficiently mixing the dissolved oxygen introduced into the purification treatment tank and the solid matter containing the microorganisms. is there.
According to the purification treatment apparatus of the sixth aspect of the invention, the intake port of the intake pipe that takes the treated water from the purification treatment tank is provided at a position higher than the discharge port of the water supply pipe with respect to the bottom of the purification treatment tank. Therefore, it is possible to take in the treated water after being mixed by the stirring action by discharging the dissolved oxygen treated water from the water supply pipe. As a result, for example, solid matter containing microorganisms is precipitated at the bottom of the purification treatment tank. Even if it exists, there exists an effect that the waste water as the treated water introduced into the solid matter or the purification treatment tank, or the dissolved oxygen treated water can be taken without bias, and the purification treatment can be performed efficiently.
According to the purification treatment apparatus of the seventh invention, in addition to the effects exhibited by the purification treatment apparatus of the sixth invention, the intake port of the intake pipe for taking treated water from the purification treatment tank is a water supply pipe in the top view of the purification treatment tank. Therefore, the treated water after mixing by the stirring action by the discharge of the dissolved oxygen treated water from the water supply pipe can be taken, and as a result, for example, the discharge of the water supply pipe can be discharged. Since it can be suppressed that the dissolved oxygen treated water discharged from the outlet is taken directly, the waste water as the treated water introduced into the solid matter containing the microorganisms or the purification treatment tank, or the dissolved oxygen treated water is not biased. There is an effect that water can be taken in and the purification treatment can be performed efficiently.
According to the purification treatment apparatus of the eighth invention, in addition to the effects exhibited by any of the purification treatment apparatuses of the first to seventh inventions, the purification treatment apparatus includes a stirring assist device, so that, for example, treated water supplied to the purification treatment tank The dissolved oxygen treatment device takes less water from the purification treatment device and sends it back with respect to the supply amount of the dissolved oxygen treatment water, and the purification treatment tank has only a stirring action by the feed water flow from the dissolved oxygen supply device. Even when the inside cannot be sufficiently stirred, the stirring force of the stirring assisting device assists the stirring of the treated water in the purification treatment tank, thereby improving the stirring efficiency. is there.
In addition, as in the case of using conventional aeration agitation, the agitation by the feed water flow from the dissolved oxygen supply device and the agitation by the agitation assisting device (mechanical agitation by the agitation blade) are used in combination. Further, since it is not necessary to set the stirring force of mechanical stirring excessively, there is an effect that the treated water in the purification treatment tank can be stirred without destroying the floc.
According to the purification treatment apparatus of the ninth invention, in addition to the effects exhibited by the purification treatment apparatus of the first to eighth inventions, the purification treatment apparatus has a bent surface formed at least at a part of the peripheral edge portion thereof, When stirring the treated water in the purification treatment tank, the treated water in the peripheral edge of the bottom can be smoothly flowed, so that the precipitated solid matter is suppressed from remaining in the peripheral edge of the bottom, Therefore, there is an effect that the stirring efficiency can be improved.
According to the purification treatment apparatus of the tenth invention, in addition to the effects exhibited by any of the purification treatment apparatuses of the second to ninth inventions, the ozone dissolution apparatus of the microbial killing apparatus uses the treated water taken from the purification treatment tank as the ozone container. By dropping (dropping) into the body in the form of water droplets, the falling water droplets can be brought into contact with an ozone-containing gas pressurized to atmospheric pressure or higher, and as a result, microorganisms in the treated water are efficiently killed. There is an effect that can be.
According to the purification treatment apparatus of the eleventh aspect of the invention, in addition to the effects exhibited by any of the purification treatment apparatuses of the first to tenth aspects, the dissolved oxygen supply device drops the treated water taken from the purification treatment tank into the oxygen container. By dropping (dropping) into a shape, there is an effect that the falling water droplet can be brought into contact with an oxygen-containing gas pressurized to atmospheric pressure or higher, and oxygen can be dissolved in the water droplet at a high concentration.
According to the purification treatment apparatus of the twelfth invention, in addition to the effects exhibited by the purification treatment apparatus of the tenth or eleventh invention, the treated water that has flowed into the ozone container body or the oxygen container body from the inlet port Since the inside of the container body is dropped as a water droplet by passing through a small hole formed through the diffusion plate disposed below, the water droplet falling inside each container body and each container body is filled. There is an effect that the contact area with ozone or oxygen can be increased to improve the killing efficiency of microorganisms in the water droplets or the rate of dissolution of oxygen in the water droplets.
According to the purification treatment apparatus of the thirteenth invention, in addition to the effect produced by the purification treatment apparatus of the twelfth invention, the small holes of each diffusion plate do not overlap with the small holes of the adjacent diffusion plates when viewed in the falling direction of the treated water. Since the treated water that has flowed into the ozone container body or the oxygen container body from the inflow port collides with the next diffusion plate every time it passes through the small holes of each diffusion plate. As the water drops fall inside the container body as a fine water droplet, and it takes a long time to drop, the contact area between the water droplet falling in each container body and the ozone or oxygen filled in each container body In addition, there is an effect that the contact time can be increased to further improve the killing efficiency of microorganisms in the water droplets or the dissolution rate of oxygen in the water droplets.
According to the purification treatment apparatus of the fourteenth aspect of the invention, in addition to the effects exhibited by any of the purification treatment apparatuses of the first to thirteenth aspects, the treated water taken from the purification treatment tank by the magnetic force imparting device is a mineral contact material. By contacting, minerals of a plurality of elements are ionized and melted, and the magnetized activation is achieved by applying a magnetic force of a magnet or ceramics to the ionized mineral. By this magnetization activation, the treated water can be brought into a state suitable for decomposition of organic pollutants by microorganisms and activation of microorganisms. Therefore, for example, there is an effect that the organic pollutant can be decomposed by microorganisms and the activation of the microorganisms can be promoted as compared with the case where the microorganisms simply decompose the organic substances in the wastewater.
According to the purification treatment apparatuses of the fifteenth and sixteenth inventions, in addition to the effects exhibited by any of the purification treatment apparatuses of the first to fourteenth inventions, the sludge storage culture tank has a microorganism concentration exceeding a predetermined reference value. In this case, the treated water in the purification treatment tank is stored, so that the solid matter in the treated water can be concentrated. Therefore, since the excess sludge in a concentrated state can be taken out from the sludge storage culture tank, there is an effect that the excess sludge can be subjected to dehydration or disposal as it is. As a result, there is no need to install a separate sludge settling tank or sludge concentration tank in order to take out the excess sludge as in the conventional purification treatment equipment. There exists an effect that the apparatus cost as the whole apparatus can be reduced.
According to the purification treatment apparatus of the seventeenth aspect of the invention, in addition to the effects exhibited by any of the purification treatment apparatuses of the first to fourteenth aspects, the treated water stored in the sludge storage culture tank is taken and pressurized to contain oxygen Since it is equipped with a dissolved oxygen supply device for the culture tank that sends back the dissolved oxygen treated water obtained by dropping into the gas atmosphere to the sludge storage culture tank, the solids of the treated water in the sludge storage culture tank are concentrated Even in the state, there is an effect that the activation of microorganisms can be promoted and the generation of malodor can be suppressed.

Claims (17)

In a purification treatment apparatus comprising a purification treatment tank in which wastewater is supplied as treated water, and performing purification treatment of treated water supplied to the purification treatment tank,
The dissolved oxygen treated water is obtained by dropping the treated water taken from the purification treatment tank into the pressurized oxygen-containing gas atmosphere, and the obtained dissolved oxygen treatment water is sent back to the purification treatment tank. A feeding device;
Microbial killing apparatus that takes treated water from the purification treatment tank and kills microorganisms contained in the treated water, and sends back treated water after killing the microorganism to the purification treatment tank,
A mixing and stirring device for stirring and mixing the treated water in the purification treatment tank;
A purification membrane treatment apparatus comprising: a passage membrane device for removing the solid matter containing microorganisms from the treatment water of the purification treatment tank with a passage membrane and passing the purified treatment water. The microorganism killing device is:
A water intake device for taking treated water from the purification treatment tank;
An ozone dissolving device that dissolves ozone into the treated water taken by the water taking device and kills microorganisms contained in the treated water;
2. The purification treatment apparatus according to claim 1, further comprising a water supply device that sends back treated water in which microorganisms are killed by dissolution of ozone by the ozone dissolution device to the purification treatment tank. The water supply device of the microorganism killing device is configured to send the treated water after the microorganisms are killed back to the upstream side of the purification treatment tank from the water intake position where the water intake device takes the treated water. The purification processing apparatus according to claim 2, characterized in that it is characterized in that: A supply amount adjusting device for adjusting the treated water supplied to the purification treatment tank to a certain amount;
The supply amount adjusting device includes a storage tank, and when the waste water is larger than a certain amount to be supplied to the purification treatment tank, the waste water is stored in the storage tank, and the waste water is supplied to the purification treatment tank. When it is less than a certain amount to be supplied, by supplying the wastewater stored in the storage tank as treated water, the treated water supplied to the purification treatment tank is adjusted to a certain amount,
The water supply device of the microorganism killing apparatus is configured to send the treated water after the microorganisms are killed back to the storage tank of the supply adjusting device. The purification treatment apparatus according to 1. The dissolved oxygen supply device includes a water supply pipe communicated with the purification treatment tank in order to send the dissolved oxygen treatment water back to the purification treatment tank,
The discharge port of the water supply pipe is configured such that the dissolved oxygen-treated water is discharged toward a direction inclined with respect to the bottom of the purification treatment tank and toward a substantially central portion of the bottom. The purification processing apparatus according to any one of claims 1 to 4, wherein: The dissolved oxygen supply device includes a water intake pipe communicated with the purification treatment tank in order to take treated water from the purification treatment tank,
6. The purification apparatus according to claim 5, wherein the intake port of the intake pipe is provided at a position higher than at least the discharge port of the water supply pipe with respect to the bottom of the purification treatment tank. The purification treatment apparatus according to claim 6, wherein the intake port of the intake pipe is disposed in the vicinity of the discharge port of the water supply pipe in a top view of the purification treatment tank. A stirring agitator having a stirring blade that is configured to be rotatable and stirs the treated water in the purification treatment tank by the rotational force, and a driving device that applies a rotational driving force to the stirring blade is provided. A purification treatment apparatus according to any one of claims 1 to 7. The purification treatment apparatus according to any one of claims 1 to 8, wherein the purification treatment tank has a bent surface at least at a part of a peripheral edge of a bottom thereof. The ozone dissolution apparatus of the microorganism killing apparatus comprises an ozone container body filled with an ozone-containing gas that is pressurized to atmospheric pressure or higher,
An inlet for allowing treated water taken from the purification treatment tank by the water intake device to flow into the ozone container body is provided at the top of the ozone container body, and at the bottom of the ozone container body, The second to ninth claims, wherein an outlet is provided for returning the treated water dropped from the inlet to the bottom of the ozone container body to the purification treatment tank through the water feeding device. The purification processing apparatus in any one of. The dissolved oxygen supply device includes an oxygen container body filled with an oxygen-containing gas pressurized to atmospheric pressure or higher,
An inlet for allowing the treated water taken from the purification treatment tank to flow into the oxygen container body is provided at the top of the oxygen container body, and oxygen from the inlet is provided at the bottom of the oxygen container body. The purification apparatus according to any one of claims 1 to 10, further comprising an outlet for sending the treated water that has dropped to the bottom of the container body back to the purification tank. 12. A diffusion plate in which a plurality of small holes are formed below the inflow port is disposed inside the ozone container body or oxygen container body. The purification treatment apparatus according to 1. A plurality of the diffusion plates are disposed at a predetermined interval from each other, and at least a part of the plurality of small holes penetratingly formed in each of the diffusion plates is viewed in the falling direction of the treated water. The purification apparatus according to claim 12, wherein the purification apparatus is provided at a position not overlapping with a small hole of an adjacent diffusion plate. A mineral supply device comprising a mineral contact material containing minerals of a plurality of elements, and a mineral supply device for contacting treated water taken from the purification treatment tank with the mineral contact material;
It has a magnet or ceramic that gives magnetic force to the treated water that is in contact with the mineral contact material of the mineral supply device, and the treated water that has been magnetically applied by the magnet or ceramic is sent back to the purification treatment tank. A purification treatment apparatus according to any one of claims 1 to 13, further comprising a magnetic force application device. A sludge storage culture tank for storing treated water taken from the purification treatment tank is provided, and the treatment water in the purification treatment tank when the microorganism concentration exceeds a predetermined reference value is provided in the sludge storage culture tank. The purification apparatus according to any one of claims 1 to 14, wherein the purification apparatus is configured to be stored. A sludge storage culture tank for storing treated water, and a concentration for taking treated water in the purification treatment tank and sending it to the sludge storage culture tank when the microbial concentration of the treated water in the purification treatment tank exceeds a predetermined concentration The purification treatment device according to any one of claims 1 to 14, further comprising an hourly water supply / water supply device. The treated water stored in the sludge storage culture tank is taken and dropped into a pressurized oxygen-containing gas atmosphere to obtain dissolved oxygen treated water, and the obtained dissolved oxygen treated water is used as the sludge storage culture. 16. The purification treatment apparatus according to claim 15, further comprising a dissolved oxygen supply device for a culture tank sent back to the tank.

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