JP2000140876A - Purifying treating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the replenishment of post-treating agent for applying post treatment such as sterilization to the treated liq. after biological purification. SOLUTION: In the device, a post-treating tank 8 is provided at the downstream side of biologically purifying treating tanks 4 and 6 and an electrolytic device 9 immersed in a stored liq. zone 8b of the post-treating tank 8 is provided. The treated liq. subjected to the biological purification at the biologically purifying treating tanks 4 and 6 is introduced to the post-treating tank 8 and power is supplied to the electrode plates 9a and 9b for electrolysis of the electrolytic device 9 immersed in the treating liq. stored in the post-treating tank 8. In this way, the electrolysis is generated in the treated liq. and the post treatment such as sterization, decoloring, purification, dephosphorization are executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a purification apparatus for purifying a living organism, and more particularly to performing a post-treatment such as sterilization or decolorization on a treatment liquid before discharging.

[0002]

2. Description of the Related Art Conventionally, purification of domestic wastewater, apartment house wastewater, factory wastewater or livestock wastewater is carried out by biological purification using activated sludge.
Alternatively, biological purification is generally performed using a combination of activated sludge and a precision membrane such as a hollow fiber membrane, and then post-treatment such as sterilization is performed in a post-treatment tank such as a disinfection tank, and then discharged. The post-treatment in the post-treatment tank is performed by a post-treatment agent such as a disinfectant (eg, sodium hypochlorite) supplied to the post-treatment tank.

[0003]

Since the post-treatment agent supplied to the post-treatment tank is a consumable, it needs to be periodically replenished, and is replenished manually. However, the replenishment of the post-treatment agent is troublesome for the manager of the purification tank, and is sometimes forgotten. If the replenishment of the post-treatment agent is neglected, wastewater that is not post-treated such as sterilization and decolorization will be discharged,
This will cause water quality problems.

Accordingly, the present invention can omit the supply of a post-treatment agent for performing a post-treatment such as sterilization on the treatment liquid after the biological purification or replenish the post-treatment agent so that the above problem does not occur. It is an object of the present invention to provide a purification treatment apparatus that can cope with a case where the user forgets the treatment, or a purification treatment apparatus that can perform a higher degree of post-treatment than before.

[0005]

According to the present invention, the present invention is applied to a structure in which the supply of the post-treatment agent to the post-treatment tank can be omitted, or even if the replenishment of the post-treatment agent is forgotten. The means is characterized in that an electrode plate for electrolysis is provided in a storage liquid area of the post-treatment tank in a purification treatment apparatus having a post-treatment tank provided downstream of a biological purification treatment tank such as activated sludge treatment and biofilm filtration. It is a purification processing device. The biological purification tank and the post-treatment tank may be formed integrally to improve workability, or may be formed separately, and a separate post-treatment tank may be added to the existing biological purification tank. Sometimes we can do that. In some cases, a post-treatment tank of a conventional type for supplying a post-treatment agent to a stored liquid is provided upstream of the post-treatment tank provided with the electrode plate for electrolysis. In the present invention, the treatment liquid subjected to the biological purification treatment in the biological purification treatment tank is guided to a post-treatment tank, and electricity is supplied to the electrode plate for electrolysis to cause electrolysis in the treatment liquid, thereby sterilizing the treatment liquid. Post-treatments such as decolorization, purification, and dephosphorization can be performed.

The means adopted by the present invention according to the second aspect of the present invention is such that the post-treatment tank is capable of performing post-treatment at a higher level than conventional ones and is capable of coping with the case where the replenishment of the post-treatment agent is forgotten. Is provided with an upstream post-treatment tank and a downstream post-treatment tank, and the upstream post-treatment tank is provided with a post-treatment agent supply tool for supplying a post-treatment agent to the storage liquid area, The purification apparatus according to claim 1, wherein the electrode plate for electrolysis is provided in a post-treatment tank on the side.

In the present invention, the treatment liquid subjected to the biological purification treatment is successively led to an upstream post-treatment tank and a downstream post-treatment tank, and treated from a post-treatment agent supply tool in the upstream post-treatment tank. Post-treatment such as sterilization of the treatment liquid can be performed with the post-treatment agent supplied in the liquid, and post-treatment such as sterilization of the treatment liquid can be performed by electrolysis in the treatment liquid in the downstream post-treatment tank. Furthermore,
In the present invention, even if the replenishment of the post-treatment agent to the post-treatment agent supply tool is forgotten, the post-treatment such as sterilization of the treatment solution is performed by electrolysis in the treatment solution in the downstream post-treatment tank. Can be.

The present invention according to claim 3, which enables post-treatment to be performed at a higher level than an existing purification treatment apparatus provided with a post-treatment tank, and can cope with a case where the replenishment of the post-treatment agent is temporarily forgotten. The means adopted in the invention is that the upstream post-treatment tank and the downstream post-treatment tank are formed separately, and the biological purification tank and the upstream post-treatment tank are integrated. 3. The purification treatment device according to 2. In the present invention,
Since a separate downstream post-treatment tank can be added to the purification treatment apparatus in which the biological purification treatment tank and the upstream post-treatment tank are integrated, the treatment liquid in the downstream post-treatment tank can be added. A high degree of post-treatment can be performed by electrolysis. Furthermore, in the present invention, even if the replenishment of the post-treatment agent to the post-treatment agent supply device is forgotten, the post-treatment such as sterilization of the treatment solution is performed by electrolysis in the treatment solution in the downstream post-treatment tank. It can be carried out.

According to a fourth aspect of the present invention, there is provided a biological purification treatment tank provided with a filtration membrane capable of separating activated sludge, wherein the treatment liquid filtered by the filtration membrane is subjected to the post-treatment. The liquid is sent to a processing tank.
Or a purification treatment device according to 3. In the present invention, before the treatment liquid subjected to the biological purification treatment in the biological purification treatment tank is introduced into the post-treatment tank, suspended substances in the treatment liquid are removed by the filtration membrane. And the dissolved substance in the processing solution can be sufficiently post-processed by electrolysis.

[0010] The means adopted by the present invention according to claim 5 in order to improve the post-treatment capacity is that a coagulation sedimentation separation tank is provided between the biological purification treatment tank and the post-treatment tank. It is a purification treatment apparatus according to 2 or 3. In the present invention, before the treatment liquid subjected to the biological purification treatment in the biological purification treatment tank is introduced into the post-treatment tank, suspended substances in the treatment liquid are removed in the coagulation / sedimentation separation tank. The processing load is reduced, and the dissolved substances in the processing solution can be sufficiently post-processed by electrolysis.

The means adopted by the present invention according to claim 6 for enabling maintenance and inspection or replacement of the electrolysis apparatus and the electrode plate for electrolysis is provided in the post-treatment tank with respect to the electrode plate for electrolysis. The purification treatment apparatus according to claim 1, 2, 3, 4, or 5, wherein an electrolysis apparatus including: is detachably provided.
In the present invention, the electrode for electrolysis can be attached and detached for maintenance and inspection of the electrolyzer and the electrode plate for electrolysis.

In order to enable maintenance and inspection and replacement of the electrolyzer and the electrode plate for electrolysis even when the electrolyzer is built in the post-treatment tank, the means adopted by the present invention according to claim 7 is as follows. Inside the post-treatment tank, a support portion for the electrolyzer is provided above the storage liquid area, the electrolyzer is detachably supported on this support portion, and the electrolyzer is provided in the post-treatment tank. 7. The purification treatment apparatus according to claim 6, wherein an inspection port for taking in and out is provided. In the present invention,
When performing maintenance, inspection, or replacement of the electrolysis device or the electrode plate for electrolysis, the electrolysis device that is taken in and out through the inspection port can be attached to and detached from the support portion.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a purification apparatus according to the present invention (hereinafter, referred to as a "purification apparatus of the present invention") will be described based on an embodiment shown in the drawings.

(First Embodiment) FIG. 1 is a sectional view showing an outline of a first embodiment of the purification apparatus of the present invention.
The purification apparatus 1 of the present invention according to the present embodiment includes an inlet 2
, An anaerobic filter tank 4 as a biological purification treatment tank, an advection tube 5, a contact aeration tank 6 as a biological purification treatment tank, a sedimentation tank 7, and a post-treatment tank 8 in this order. Have.
The contact aeration tank 6 is provided between the anaerobic filter tank 4 and the contact aeration tank 6.
A sludge transfer pipe (not shown) for transferring the sludge separated in the above to the anaerobic filter bed tank 4 is provided. A sludge transfer pipe (not shown) for transferring the sludge generated in the sedimentation tank 7 to the contact aeration tank 6 is provided between the contact aeration tank 6 and the sedimentation tank 7. The purification treatment apparatus 1 includes the tanks 4, 6, 7, 8 and the advection pipe 5.
Are integrally formed to improve the workability.

The post-treatment tank 8 has an electrolysis device 9 removably supported by a support portion 10 in the tank 8a, and the electrolysis electrode plates 9a and 9b of the electrolysis device 9 are stored in a storage liquid area. 8b. The electrolysis electrode plates 9a and 9b of the electrolysis device 9 are provided as one set or a plurality of sets (not shown) according to the processing capacity. The electrolyzer 9 is detachably connected via a connector 12 to a DC power supply wiring 11 extending into the tank 8a. The connector 12 is protected by a detachable waterproof cap. The post-treatment tank 8 is provided with an inspection port 13 on the ceiling so that the maintenance and inspection or replacement of the electrodes 9a and 9b can be carried out through the inspection port 13. The inspection port 13 is provided with a lid 14 that can be opened and closed. The DC power supply (not shown) of the electrolysis device 9 periodically reverses the polarity of the electrolysis electrode plates 9a and 9b of the electrolysis device 9 to convert the scale generated by the electrolysis electrode plate during cathode operation, It can be removed by dissolving or peeling at the time of anode.

When the treatment liquid flows from the precipitation tank 7 to the post-treatment tank 8 while the electrolysis apparatus 9 is energized, the purification treatment apparatus 1 uses the electrolytic solution plates 9a and 9b immersed in the treatment liquid. Electrolysis occurs in the process, sterilization of the processing solution, decolorization,
Post-treatments such as purification (removal of COD, BOD, SS) and dephosphorization are performed. In this treatment, chlorine ions and the like in the treatment liquid are oxidized and changed to hypochlorite ions and the like, and actions such as sterilization and decolorization occur. Since the post-treatment is performed in the purification treatment device 1 only by energizing the electrolysis device 9, the periodic replenishment of the post-treatment agent required in the conventional purification treatment device is unnecessary, and the burden on the administrator is reduced. It is reduced. Furthermore,
The electrode plates 9a and 9b for electrolysis, which are insoluble and have a surface of a base such as titanium coated with platinum or the like, have a life of about 1 to 2 years, and can reduce the management burden on the manager.

FIG. 2 is a sectional view showing an outline of a purification apparatus 16 according to another embodiment of the present invention in the first embodiment. The difference between the purification apparatus 16 and the purification apparatus 1 shown in FIG. In addition to the two filter tanks 4, the anaerobic filter tanks 4,
4 are communicated by an advection pipe 5, and other than this difference, the apparatus is substantially the same as the purification processing apparatus 1 shown in FIG.

(Second Embodiment) FIG. 3 is a sectional view showing an outline of a second embodiment of the purification apparatus of the present invention.
The purification apparatus 21 of the present invention according to the present embodiment includes, in order from the inflow port 2 to the outflow port 3, a mixing / stirring tank 22 and an advection chamber 23 that are anaerobic biological purification processing tanks, and an aerobic biological purification processing. A stirring filter bed tank 24 and a biological filtration membrane tank 25 which are tanks, and a post-treatment tank 8 are provided. Stirring filter tank 24
Is filled with a mesh contact material 26, and the biological filtration membrane tank 2
5 is provided with a circulating submersible pump 28 which is filled with a plurality of filter media 27 such as granular ceramic filter media.
In the purification treatment apparatus 21, the tanks 22, 24, 25, and 8 and the advection chamber 23 are integrally formed to improve workability.

As in the first embodiment, the post-treatment tank 8 is provided with an electrolyzer 9 in the tank 8a and immerses the electrode plates 9a and 9b for electrolysis in the storage liquid area 8b. It is. Electrolysis electrode plate 9a of electrolysis device 9,
9b is provided with one set or a plurality of sets (not shown) according to the processing capacity. The electrolysis device 9 is detachably supported by a support portion 10 provided in the tank 8a,
Is detachably connected to the DC power supply wiring 11 extending through the connector 12 via the connector 12, so that the electrolysis device 9 can be taken out of the tank through the inspection port 13 for maintenance and inspection and replacement. , Electrolysis electrode plates 9a, 9
b can be easily removed from the electrolyzer 9.

When the treatment liquid flows into the post-treatment tank 8 from the biological filtration membrane tank 25 while the electrolysis apparatus 9 is energized, the purification treatment apparatus 21 immerses the electrolysis electrode plate 9 in the treatment liquid.
Electrolysis occurs in the processing liquid due to a and 9b, and post-treatments such as sterilization, decolorization, purification, and dephosphorization of the processing liquid are performed in the same manner as in the first embodiment. The processing liquid flowing into the post-processing tank 8 has a suspended substance removed in advance by a filter material 27 such as a mesh contact material 26 and a plurality of granular ceramic filter materials. for that reason,
The purification treatment apparatus 21 can reduce the post-treatment load in the post-treatment tank 8 and can sufficiently post-treat dissolved substances in the treatment liquid by electrolysis.

(Third Embodiment) FIG. 4 is a sectional view showing an outline of a third embodiment of the purification apparatus of the present invention.
The purification apparatus 31 of the present invention according to the present embodiment includes an intermittent aeration tank 32, which is an aerobic biological purification tank, and an activated sludge membrane separation tank 33 in order from the inlet 2 to the outlet 3.
And a post-treatment tank 34. The intermittent aeration tank 32 and the activated sludge membrane separation tank 33 are formed integrally, and the post-treatment tank 34 is formed separately from these tanks 32 and 33. A separation membrane 35 is built in the activated sludge membrane separation tank 33. The processing liquid in the intermittent aeration tank 32 is sent to the post-processing tank 34 by the pump 37, and the processing liquid that has passed through the separation membrane 35 is sent to the post-processing tank 34 by the pump 37.

The post-treatment tank 34 is provided with an electrolyzer 9 in the tank 34a so that the electrode plates 9a and 9b for electrolysis are immersed in a storage liquid area 34b. The electrolysis electrode plates 9a and 9b of the electrolysis device 9 are provided as one set or a plurality of sets (not shown) according to the processing capacity. The electrolysis device 9 is detachably supported by a support portion 10 provided in a tank 34a.

When the processing liquid flows into the post-processing tank 34 while the electrolysis apparatus 9 is energized, the purification processing apparatus 31 performs electrolysis in the processing liquid by the electrolysis electrode plates 9a and 9b immersed in the processing liquid. Occurs, and as in the first embodiment,
Post-treatments such as sterilization, decolorization, purification, and dephosphorization of the treatment liquid are performed. The purification treatment apparatus 31 allows the treatment liquid from which suspended substances have been removed in advance by the separation membrane 35 to flow into the post-treatment tank 34, so that the post-treatment load in the post-treatment tank 34 is reduced, and the dissolved substances in the treatment liquid are electrolyzed. Can be sufficiently post-processed.

(Fourth Embodiment) FIG. 5 is a sectional view showing an outline of a fourth embodiment of the purification apparatus of the present invention.
The purification apparatus 41 of the present invention according to the present embodiment includes an aerobic biological purification tank 42, an advection pipe 5, a coagulation sedimentation tank 43, and a post-treatment tank in this order from the inlet 2 to the outlet 3. 44. These three tanks 42, 43, 44
Can be formed integrally or individually separately.

The post-treatment tank 44 is provided with a plurality of sets of electrolyzers 9, and the electrolysis electrode plates 9 of each electrolyzer 9 are provided.
a and 9b are immersed in the storage liquid area 44b.
The electrolyzer 9 is provided detachably with respect to the post-treatment tank 44, and can be maintained and inspected and replaced.

When the processing liquid flows into the post-processing tank 44 with the respective electrolysis apparatuses 9 being energized, the purification processing apparatus 41 uses the electrolysis electrodes 9a and 9b immersed in the processing liquid to generate electricity in the processing liquid. Decomposition occurs, and post-treatments such as sterilization, decolorization, purification, and dephosphorization of the processing liquid are performed as in the first embodiment. The purification treatment device 41 allows the treatment liquid from which suspended substances have been removed in advance in the coagulation sedimentation tank 43 to flow into the post-treatment tank 44, so that the post-treatment load in the post-treatment tank 44 is reduced, and the dissolved substances in the treatment liquid are converted into electricity. It can be sufficiently worked up by decomposition.

(Fifth Embodiment) FIG. 6 is a sectional view showing the outline of a fifth embodiment of the purification apparatus of the present invention.
The purification apparatus 51 of the present invention according to the present embodiment includes an additional purification apparatus 52 (for example, a combined purification tank) with an existing post-treatment tank 52 (e.g., a combined purification tank) that has already been type-certified by a public organization or the like. A separate post-treatment tank 54 is added. The purification apparatus 51 of the present invention connects the purification apparatus 52 and the post-treatment tank 54 with a liquid feed pipe 55, and
The treatment liquid flowing out of the tank is guided to the post-treatment tank 54, and the post-treatment tank 5
In step 4, the post-processing is further performed to release from the discharge port 54c.

The upstream purification apparatus 52 includes an anaerobic filter tank 4 as a biological purification tank, an advection pipe 5 and a contact aeration as a biological purification tank in order from the inlet 2 to the outlet 3. A tank 6, a settling tank 7, and a post-treatment tank 58 are provided.
The contact aeration tank 6 is provided between the anaerobic filter tank 4 and the contact aeration tank 6.
A sludge transfer pipe (not shown) for transferring the sludge separated in the above to the anaerobic filter bed tank 4 is provided. A sludge transfer pipe (not shown) for transferring the sludge generated in the sedimentation tank 7 to the contact aeration tank 6 is provided between the contact aeration tank 6 and the sedimentation tank 7. In the purification treatment device 52, the tanks 4, 6, 7, 58 and the advection pipe 5 are integrally formed to improve workability. The upstream post-treatment tank 58 is provided with a post-treatment agent supply tool 59 in the tank 58a to supply a post-treatment agent (for example, sodium hypochlorite) to the storage liquid area 58b. The post-treatment tank 58 is provided with an inspection port 13 at the ceiling, so that the post-treatment agent supply tool 59 can be replenished with the post-treatment agent. The inspection port 13 is provided with a lid 14 that can be opened and closed.

The downstream post-treatment tank 54 is provided in the tank 5
4a is provided with an electrolysis device 9 and electrolysis electrode plates 9a,
9b is immersed in the storage area 54b. The electrolysis electrode plates 9a and 9b of the electrolysis device 9 are provided as one set or a plurality of sets (not shown) according to the processing capacity. The electrolyzer 9 is detachably supported by a support 10 provided in the tank 54a. The post-treatment tank 54 is provided with an inspection port 13 on the ceiling, and when the maintenance and inspection or replacement of the electrolysis electrodes 9a and 9b is performed, the entire electrolysis apparatus 9 or the electrolysis The electrodes 9a and 9b can be moved in and out. The inspection port 13 is provided with a lid 14 that can be opened and closed.

The processing liquid post-processed in the post-treatment tank 58 of the upstream purification apparatus 52 is led to a downstream post-treatment tank 54 via a liquid feed pipe 55. When the processing liquid flows into the post-treatment tank 54 while the electrolysis apparatus 9 is energized, electrolysis occurs in the processing liquid by the electrode plates 9a and 9b for electrolysis immersed in the processing liquid, and the first embodiment is used. Similarly to the above, post-treatments such as sterilization, decolorization, purification, and dephosphorization of the treatment liquid are performed, and the highly post-treated treatment liquid is discharged from the discharge port 54c.

The purifying apparatus 51 of the present invention can perform a high degree of post-processing by the downstream post-processing tank 54 and temporarily replenish the post-processing agent supply tool 59 to the post-processing agent supply tool 59 on the upstream side post-processing tank 58. Even if it is forgotten, it is possible to cope with it in the downstream post-treatment tank 54.

In the purifying apparatus 51 of the present invention, the purifying apparatus 52 on the upstream side is connected to the post-treatment tank 8 of the purifying apparatus 16 shown in FIG.
3 or the post-treatment tank 8 shown in FIG. 3 is replaced with a post-treatment tank 58 having a conventional post-treatment agent supply tool 59 (see FIG. 6). It is also possible to replace it with a purified purification apparatus.

Further, the purification apparatus 51 of the present invention comprises a post-treatment tank 58 with a post-treatment agent supply device 59 and a post-treatment tank with an electrolyzer 9 in a known upstream purification apparatus without a post-treatment tank. It is also possible to adopt a structure in which a post-treatment tank composed of two tanks integrated with the tank 54 is added.

[0034]

According to the purification treatment apparatus of the present invention, the treatment liquid stored in the post-treatment tank can be electrolyzed by energizing the electrolysis apparatus to perform post-treatment such as sterilization and decolorization.
The post-treated processing liquid can be discharged. The purifying apparatus according to the first aspect of the present invention is characterized in that when a conventional post-treatment tank for supplying a post-treatment agent is replaced with a post-treatment tank with an electrode plate for electrolysis, the post-treatment agent used in the conventional apparatus is used. Since periodic replenishment can be omitted, maintenance of the apparatus is facilitated, and the burden on the administrator can be reduced. The purifying apparatus according to the second aspect of the present invention can perform post-processing at a higher level than before, and can cope with forgetting to replenish the post-processing agent. The purifying apparatus according to the third aspect of the present invention can perform higher post-processing than an existing purifying apparatus having a post-processing tank, and can cope with forgetting to replenish the post-processing agent. Becomes In the purifying apparatus according to the present invention, since the treatment liquid from which suspended substances have been removed is guided to the post-treatment tank, the post-treatment load on the post-treatment tank is reduced, and the dissolution in the treatment liquid is reduced. The substance can be sufficiently post-processed by electrolysis, and the post-processing capacity can be improved.

In the purification treatment apparatus according to the present invention, since the electrolysis apparatus can be attached and detached, maintenance and inspection and replacement of the entire electrolysis apparatus and the electrode plate for electrolysis can be easily performed, and the burden on the administrator can be reduced. it can. According to the purification treatment apparatus of the present invention, since the electrolysis apparatus which can be taken in and out through the inspection port can be attached to and detached from the support portion in the tank, the electrolysis apparatus can be installed even when the electrolysis apparatus is built in the post-treatment tank. In addition, maintenance and inspection and replacement of the electrode plate for electrolysis can be easily performed, and the burden on the administrator can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an outline of a first embodiment of a purification treatment apparatus of the present invention.

FIG. 2 is a sectional view showing an outline of another embodiment of the first embodiment.

FIG. 3 is a sectional view showing an outline of a second embodiment of the purification apparatus of the present invention.

FIG. 4 is a sectional view showing an outline of a third embodiment of the purification treatment apparatus of the present invention.

FIG. 5 is a sectional view showing an outline of a fourth embodiment of the purification treatment apparatus of the present invention.

FIG. 6 is a sectional view showing an outline of a fifth embodiment of the purification treatment apparatus of the present invention.

[Explanation of symbols]

4 ... Anaerobic filter tank, 6 ... Contact aeration tank, 8 (34,44,5)
4) Post-treatment tank, 9 Electrolyzer, 9a, 9b Electrode plate for electrolysis, 13 Inspection port, 22 Mixing and stirring tank, 23
... advection chamber, 24 ... stirred filter bed tank, 25 ... biological filtration membrane tank, 3
2: Intermittent aeration tank, 33: activated sludge membrane separation tank, 42: biological purification treatment tank

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tatsuro Yamamoto 5-1-1 Koiehonmachi, Tokoname-shi, Aichi Prefecture Inax Corporation (72) Inventor Kenji 5-1-1 Koiehonmachi, Tokoname-city, Aichi Prefecture Inax Corporation (72) Inventor Tsutomu Ito 5-1-1 Koiehonmachi, Tokoname-shi, Aichi Prefecture Inax Corporation (72) Inventor Keisuke Sakakibara 5-1-1 Koiehonmachi, Tokoname-shi, Aichi Prefecture Inax Corporation (72) Inventor Nojibe Kenji 5-1-1 Koiehoncho, Tokoname-shi, Aichi Prefecture Inax Corporation

Claims (7)

[Claims] 1. A purification treatment apparatus having a post-treatment tank downstream of a biological purification treatment tank for activated sludge treatment, biofilm filtration, etc., wherein an electrode plate for electrolysis is provided in a storage liquid region of the post-treatment tank. A purification treatment device characterized by the above-mentioned. 2. The post-treatment tank has an upstream post-treatment tank and a downstream post-treatment tank, and the post-treatment tank supplies the post-treatment agent to the storage liquid area in the upstream post-treatment tank. Agent supply tool,
The purification apparatus according to claim 1, wherein the electrode plate for electrolysis is provided in the downstream post-treatment tank. 3. The post-treatment tank according to claim 2, wherein the upstream post-treatment tank and the downstream post-treatment tank are formed separately, and the biological purification tank and the upstream post-treatment tank are integrated. A purification treatment apparatus according to claim 1. 4. The method according to claim 1, wherein the biological purification treatment tank is provided with a filtration membrane capable of separating activated sludge, and the treatment liquid filtered by the filtration membrane is sent to the post-treatment tank. Purification processing equipment. 5. The purification treatment apparatus according to claim 1, wherein a coagulation sedimentation separation tank is provided between the biological purification treatment tank and the post-treatment tank. 6. An electrolysis apparatus including the electrode plate for electrolysis is detachably provided to the post-treatment tank.
The purification treatment apparatus according to 2, 3, 4 or 5. 7. A support portion for an electrolyzer is provided inside the post-treatment tank above a storage liquid area, and the electrolyzer is detachably supported on the support portion. The purification treatment apparatus according to claim 6, further comprising an inspection port for taking the electrolysis apparatus in and out.