KR100421515B1 - device for treatment of sewage - Google Patents

Abstract

A diffuser tube 271 is formed to cover the left side, the lower surface, and the right side of the electrode 260. The distal end of the diffuser 271 is "U" shaped, and the upper left end is connected to the pump. In addition, a cover 277 is attached to the upper right end of the diffuser 271.

A plurality of holes 271A are formed in the lower surface of the diffuser 271. In this way, when air is supplied from the pump, the diffuser 271 discharges bubbles from the holes 271A. When the electrode 260 is electrolyzed, the bubbles formed on the surface of the electrode 260 are removed by this bubble. The electrode 260 and the diffuser 271 are fixed to the support 261. The diffuser 271 is detachable from the pump 256.

Description

Sewage Treatment Equipment {device for treatment of sewage}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment apparatus, and more particularly, to a sewage treatment apparatus for depositing phosphorus components in treated water as metal salts which are poorly soluble in water.

The conventional sewage treatment apparatus was equipped with the electrode, and the metal ion which generate | occur | produced by electrolyzing the said electrode was made to deposit the phosphorus component in process water as a metal salt insoluble in water.

28, the upper part of the plate-shaped electrode 901 is attached to the support tool 901a. 29 is a perspective view of the support tool of FIG. 28.

Wiring is embedded in the side surface of the support tool 901a. Terminals 910 and 911 are connected to both ends of the wiring. The terminal 911 is connected to a power supply for supplying electric power to the electrode 901. The terminal 910 is exposed to the side surface of the support tool 901a so as to be connected to the electrode 901.

In addition, as shown in FIG. 28, when the electrode 901 was attached to the support tool 901a, the terminal 910 was covered with the electrode 901.

However, since the treated water may enter the gap between the support 901a and the electrode 901, the terminal 910 may corrode.

When the terminal 910 is corroded, it adheres to the electrode 901, so that the exchange of the electrode 901 is complicated.

In addition, when the terminal 910 is corroded, a problem occurs in the supply of electric power to the electrode 901. However, replacement of the terminal 910 which is part of the wiring is difficult. Therefore, in the conventional sewage treatment apparatus, the problem that the efficiency of the electrolysis of the electrode 901 falls by corrosion of the terminal 910 arises.

Moreover, in the conventional sewage treatment apparatus, the tubular member which generate | occur | produces a bubble in the vicinity of the electrode 901 at the time of the electrolysis of the electrode 901 was provided. This is to remove the film generated on the surface of the electrode 901 by the bubbles generated in the tubular member.

However, a situation has arisen in which the suspended solids contained in the sewage enter the interior of the tubular member, whereby bubbles are hardly generated sufficiently. Even in such a situation, the film which generate | occur | produced on the surface of the electrode 901 cannot fully be removed, and the problem that the efficiency of the electrolysis of the electrode 901 fell has arisen.

In the sewage treatment apparatus, when the efficiency of the electrolysis of the electrode 901 is lowered, a situation arises in which the phosphorus component in the sewage is not sufficiently removed.

In addition, there has been a conventional sewage treatment apparatus of a type disposed underground. In general, a sewage treatment device of this type has been inspected and repaired by removing a manhole and putting a worker in the basement.

However, when inspection and repair are performed underground, the said inspection or repair may not be enough. In the sewage treatment apparatus, if the inspection or repair is not sufficiently performed, the sewage treatment capability may not be exhibited reliably. Also from this point of view, it was difficult to reliably remove the aggregated phosphorus compound in the treated water.

Therefore, this invention is made | formed in view of such a situation, One of the objectives is to provide the sewage treatment apparatus which can reliably remove a phosphorus compound from treated water.

Sewage treatment apparatus in any aspect of the present invention is a sewage treatment apparatus installed in the basement for treating sewage, including a sewage treatment unit for receiving sewage and an ion supply unit for supplying iron ions or aluminum ions to the sewage treatment unit, The ion supply unit is characterized by having an electrode mounted in the manhole.

As a result, by moving the manhole to the ground, the electrode can be moved to the ground, whereby the maintenance of the electrode can be performed easily and reliably.

Therefore, in the sewage treatment apparatus, it is possible to reliably remove the phosphorus compound based on the electrolytic reaction of the electrode.

In addition, the sewage treatment apparatus according to the present invention preferably further includes detection means capable of detecting whether or not the electrode is immersed in the treated water.

Thereby, the state which an electrode is not submerged in process water can be avoided.

Therefore, the problem assumed by attaching an electrode to a manhole can be avoided.

The sewage treatment apparatus according to another aspect of the present invention is a sewage treatment apparatus for electrolyzing an electrode by supplying electric power to a electrode from a predetermined power source including an electrode, comprising: an electrode support member for supporting the electrode, an electrode, and a predetermined power source; Wires for connecting the wires, a terminal formed at the end of the electrode side of the wires, attached to the electrode support member, detachable from the electrode support member, and a connecting member for electrically connecting the terminal and the electrode. And the terminal is embedded in the electrode support member so as not to contact the outside of the electrode support member.

According to the present invention, the terminal mounted on the wiring is embedded so as not to contact the outside of the electrode supporting member, and is connected to the electrode via the connecting member. In other words, in the sewage treatment apparatus, exposure of the terminal is avoided, and instead of the terminal, a detachable connecting member is directly connected to the electrode.

Therefore, corrosion of the terminal can be prevented. As a result, the terminal is corroded, and the supply of power to the electrode can be avoided. Further, since the sewage treatment apparatus is continuously used, even if the connecting member is corroded, it is easy to replace.

Moreover, in the sewage treatment apparatus which concerns on this invention, it is preferable that an electrode support member contains at least one part of wiring.

Thereby, wiring can be arrange | positioned so that it may be compact and submerged in water.

Moreover, in the sewage treatment apparatus which concerns on this invention, it is preferable that an electrode support member can support a some electrode, and is equipped with the insulator arrange | positioned between one electrode and another electrode among a some electrode. .

Thereby, a some electrode can be supported by the electrode support member compactly and without shorting it.

A sewage treatment apparatus according to another aspect of the present invention is a sewage treatment apparatus for electrolyzing an electrode including an electrode, the hole being formed and connected so as to be detached from a predetermined pump, and through the hole near the electrode. It further comprises a tube for emitting bubbles.

According to the present invention, the electrode surface is cleaned by the bubbles emitted from the tube, and the tube can be easily and reliably cleaned by removing the tube from the pump.

Therefore, in the sewage treatment apparatus, the surface of the electrode can be washed continuously by bubbles released from the tube.

Moreover, it is preferable that the sewage treatment apparatus which concerns on this invention further contains the electrode support member which supports an electrode and a pipe | tube.

Thereby, during the exchange or maintenance of the electrode, the pipe supported by the electrode supporting member together with the electrode can be removed from the pump and cleaned.

Thus, maintenance work in the sewage treatment apparatus becomes easy.

In addition, the sewage treatment apparatus according to the present invention, the electrode further comprises a wiring for connecting the predetermined power supply and the electrode by electrolysis by supplying electric power from a predetermined power supply, and an electrode support member for supporting the electrode, It is preferable that the supporting member contains at least a part of the wiring.

Thereby, wiring can be arrange | positioned compactly and so that it cannot be submerged in water.

In addition, the sewage treatment apparatus according to the present invention includes an anaerobic tank in which sewage is introduced and anaerobic microorganisms are present, an aerobic tank in which sewage is introduced and aerobic microorganisms are present, and sewage is introduced. Iii) further comprising a settling tank for settling, wherein the electrode is preferably submerged in sewage inside the anaerobic, aerobic or settling tank.

Thereby, in the sewage treatment apparatus, phosphorus can be aggregated as a precipitate by metal ions generated by electrolysis of the electrode. In other words, in the sewage treatment apparatus, it is not necessary to form the flocculation tank again.

In addition, the sewage treatment apparatus according to the present invention preferably introduces only sewage, and further includes an electrolytic cell for electrolyzing the electrode, and the electrode is preferably immersed in the sewage in the electrolytic cell.

Thereby, in the sewage treatment apparatus, phosphorus can be aggregated as a precipitate by metal ions generated by electrolysis of the electrode. In other words, in the sewage treatment apparatus, it is not necessary to form the flocculation tank again. In addition, since only sewage is introduced into the electrolytic cell, it is extremely possible to avoid that the electrolysis of the electrode is inhibited by sludge or the like.

These and other objects, features, aspects, and advantages of the present invention will become apparent from the following detailed description of the invention, which is understood in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the sewage treatment system containing the sewage treatment apparatus which is 1st Embodiment of this invention.

FIG. 2 is a diagram showing a detailed configuration of the electrolytic cell of FIG. 1 and its vicinity.

3 is a view showing the structure of the electrode and the electrode support of FIG.

FIG. 4 is a view showing a state in which the electrode and the electrode support of FIG. 3 are combined to be mounted on an electrolytic cell.

5 is a perspective view of the electrode support of FIG. 3.

6 is a perspective view of the electrolytic cell of FIG. 1.

FIG. 7 is a view showing an electrode support portion that can support two electrodes and has a cutout portion. FIG.

8 is a view showing a state where the unitized electrode and the electrode support part are accommodated in the case.

9 is a view showing a wastewater treatment apparatus according to a second embodiment of the present invention.

Fig. 10 is a view showing the sewage treatment apparatus as a third embodiment of the present invention.

FIG. 11 is a side view of the membrane and magnet of FIG. 10.

12 is a partial perspective view of the magnet of FIG. 10.

It is a figure which shows the sewage treatment apparatus which is 4th Embodiment of this invention.

It is a figure which shows the sewage treatment apparatus which is 5th Embodiment of this invention.

It is a figure which shows the sewage treatment apparatus which is 6th Embodiment of this invention.

It is a figure which shows the sewage treatment apparatus which is a 7th embodiment of this invention.

It is a figure for demonstrating the mounting aspect to the manhole of the electrode of FIG.

18 is a longitudinal sectional view of a sewage treatment system including a sewage treatment apparatus as an eighth embodiment of the present invention.

19 is a cross-sectional view of the tank shown in FIG. 18.

20 is a perspective view of the electrode pair of FIG. 18.

FIG. 21 is an exploded perspective view of the electrode pair of FIG. 18 partially broken; FIG.

FIG. 22 is a partially broken exploded perspective view of the electrode pair of FIG. 20.

FIG. 23 is a partially broken exploded perspective view of the electrode pair of FIG. 20.

24 (a) and 24 (b) are diagrams showing an electrode and a member disposed around the electrode in the electrolytic unit of the ninth embodiment of the present invention.

25 is a diagram schematically showing an electrolytic unit of a ninth embodiment of the present invention.

It is a figure for demonstrating the mounting state of the support of the electrode of FIG.

27 (a) and 27 (b) are diagrams showing modifications of the electrode and the member disposed around the electrode in the electrolytic unit of the ninth embodiment of the present invention.

28 is a perspective view of an electrode mounted on a support in the conventional sewage treatment apparatus.

FIG. 29 is a perspective view of the support of FIG. 28. FIG.

* Description of the symbols for the main parts of the drawings *

Reference numerals 1 tank 2 first partition wall 3 second partition wall

4: third partition wall 5: first anaerobic filter

6 inlet 7 first anaerobic phase 8 first advection pipe

9: 1st water supply port 10: 2nd anaerobic award 11: 2nd anaerobic award

12. Second advection pipe 13 Second supply port 14 Contact plating tank

16: 1st diffuser 17: 1st blower 18: 1st pump

19: treatment tank 20: communication port 21: disinfection tank

22 sterilizer 23 drain port 24 first conveying pipe

28 manhole 32 ejection device 37 electrolytic cell

40: third diffuser 41, 42: electrode

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on drawing. In addition, although the wastewater treatment apparatus of each embodiment shown below is mainly applied to the large-scale wastewater treatment facility which processes household wastewater and a factory wastewater, it can also be applied to the small-medium-sized wastewater treatment facilities, such as a domestic combined-purification tank. . Moreover, according to the sewage treatment apparatus of each embodiment, the coagulation sedimentation process of especially the phosphorus compound contained in domestic wastewater, wastewater of a plating factory, etc. can be performed.

(1st embodiment)

With reference to FIG. 1, the tank 1 is buried underground. The inside of this tank 1 is the 1st anaerobic filtration tank 5 mentioned later by the 1st partition wall 2, the 2nd partition wall 3, and the 3rd partition wall 4. It is divided into a second anaerobic filter tank (10), a contact plating tank (14), a treatment tank (19) and a disinfection tank (21). The upper portion of the tank 1 is covered with a plurality of manholes 28.

The daily anaerobic wastewater flows into the first anaerobic filter tank (5). The first anaerobic filter 7 is formed in the first anaerobic tank 5. In the first anaerobic tank (5), the hardly degradable miscellaneous material mixed in the introduced domestic wastewater is precipitated and the organic matter in the domestic wastewater is anaerobicly decomposed by the anaerobic microorganisms attached to the first anaerobic bed (7). . In the first anaerobic filter tank 5, organic nitrogen in domestic wastewater is anaerobicly decomposed into ammonia nitrogen.

The 1st air flow pipe 8 is for supplying the treated water anaerobicly decomposed by the said 1st anaerobic filtration tank 5 to the 2nd anaerobic filtration tank 10 via the 1st water supply port 9. The first water inlet 9 penetrates the upper portion of the first dividing wall 2.

The second anaerobic filtration tank 10 is partitioned from the first anaerobic filtration tank 5 by the first dividing wall 2. The second anaerobic filter 11 is formed in the second anaerobic tank 10. Suspended matter is captured in the second anaerobic phase (11). In addition, the anaerobic microorganisms in the second anaerobic filter 11 anaerobicly decompose organic matter, and as a result, organic nitrogen is generated. Organic nitrogen is anaerobically decomposed into ammoniacal nitrogen.

The 2nd air flow pipe 12 is for supplying the treated water anaerobicly decomposed by the 2nd anaerobic filter tank 10 to the contact aeration tank 14 via the 2nd water supply port 13. The second water supply port 13 penetrates through the upper part of the second dividing wall 3. The blowing device 32 is formed with a blowing port 31 in the second flow pipe 12, and is connected to the third blower 30. The blowing device 32 sends air from the blowing port 31 into the 2nd air flow pipe 12 by sending air from the 3rd blower 30. Thereby, the water supply of the process water from the 2nd anaerobic filter tank 10 to the contact aeration tank 14 in the 2nd air flow pipe 12 is accelerated | stimulated.

The treated water subjected to anaerobic treatment in the second anaerobic filter tank 10 flows into the contact aeration tank 14 through the second advection pipe 12. The contact material 15 formed in the contact aeration tank 14 promotes culture of aerobic microorganisms. The first diffuser 16 is formed near the bottom of the contact aeration tank 14 and has a plurality of air outlets. The 1st diffuser 16 is connected with the 1st blower 17, discharge | releases the air supplied from the 1st blower 17 from an air outlet, and maintains the inside of the contact aeration tank 14 in exhalation state. Thereby, in the contact aeration tank 14, the treated water is aerobicly decomposed by an aerobic microorganism, and ammonia nitrogen is decomposed into nitrate nitrogen by the action of the nitrifying bacteria. In general, nitrifying bacteria refers to ammonia oxidizing bacteria and nitrite oxidizing bacteria.

The contact film 15 has a biofilm that has grown and gradually increased. And when air is supplied from the 1st blower 17 to the 1st diffuser 16, air is discharged from the air outlet of the 1st diffuser 16, and the biofilm adhered to the contact material 15 peels off. do.

The treatment water tank 19 is partitioned from the contact aeration tank 14 by the third dividing wall 4. The 3rd air flow pipe 29 is connected to the 1st pump 18, The supernatant liquid of the treated water exhaled in the contact aeration tank 14 by the 1st pump 18 is operated, The communication port 20 It is supplied to the treatment tank 19 through. The communication port 20 has penetrated the upper part of the 3rd partition wall 4.

The supernatant of the treatment tank 19 flows into the disinfection tank 21. A sterilizer 22 is formed inside the sterilization tank 21. By the chemical | medical agent, such as the chlorine system provided in the sterilizing apparatus 22, the process water which flowed into the disinfection tank 19 is disinfected. Then, the sterilized treated water is drained out of the tank 1 through the drain port 23.

The 1st conveyance pipe 24 is a pipe which connects the disinfection tank 19 and the electrolytic cell 37 in succession. The 2nd diffuser 25 is provided in the 1st conveyance pipe 24, forms many air outlets, and is connected to the 2nd blower 26. As shown in FIG. The second diffuser 25 discharges air supplied from the second blower 26 from the air outlet. As a result, a predetermined amount of the supernatant liquid in the treatment water tank 19 is sucked into the first conveying pipe 24 and is transferred to the electrolytic cell 37.

In the electrolytic cell 37, electrodes 41 and 42 are formed, and below the electrodes 41 and 42, a third diffuser 40 is formed. The third diffuser 40 is provided with a plurality of air outlets, and is connected to the fourth blower 39. And the air is sent from the 4th blower 39, and the 3rd diffuser 40 sends air from an air outlet, and the passivation film etc. which originate in the biofilm, nitrate ion, etc. on the surface of the electrodes 41, 42, etc. Remove the film. In addition, it is preferable that the electrodes 41 and 42 are formed near the wall surface of the electrolytic cell 37 so that the film | membrane by blowing out of the air of the 3rd diffuser 40 can be performed more effectively.

The treated water in the electrolytic cell 37 is discharged to the first anaerobic filter tank 5 through the discharge port 47. In addition, a cover 36 is formed in the discharge port 47 of the electrolytic cell 37. The lid 36 is connected to the rich man 35. In the vicinity of the lid 36, a water level sensor 48 for detecting the water level of the first anaerobic filter 5 is provided. The electrodes 41, 42, the water level sensor 48, and the fourth blower 39 are connected to the power supply device 38.

The electrodes 41 and 42 are comprised by iron or aluminum, for example. The power supply device 38 applies a voltage to the electrodes 41 and 42 so that either one becomes a + pole and the other becomes a-pole. Here, the electrolytic reaction in the + pole and the-pole when the electrodes 41 and 42 are made of iron is shown.

+ ^{Pole: Fe → Fe 2+ + 2e -} ... (One)

- ^{pole: 2H + + 2e - → H2} ↑ ... (2)

The divalent iron ions (Fe ²⁺ ) generated at the + pole are oxidized by air to form trivalent iron ions (Fe ³⁺ ). On the other hand, when the electrodes 41 and 42 are made of aluminum, the reaction of the negative electrode does not change, and the electrolytic reaction of the positive electrode becomes the following formula (3).

+ ^{Pole: Al → Al 3+ + 3e -} ... (3)

In this embodiment, below, the case where the electrodes 41 and 42 are comprised with iron is demonstrated, In all points except iron, it can be changed into aluminum.

The trivalent iron ions (Fe ³⁺ ) produced by the electrolytic reaction and the oxidation reaction of the formula (1) are used to aggregate the phosphorus compound in the treated water sent from the first conveying pipe 24. In addition, the main thing of the aggregation reaction formula of the phosphorus compound using Fe3 ⁺ is shown in Formula (4).

PO ₄ ^3- + Fe ³⁺ → FePO ₄ ↓. (4)

At the bottom of the electrolytic cell 37, a valve 43 for removing aggregates and sludge from the electrolytic cell 37 from the electrolytic cell 37 is formed. By opening the valve 43, the sludge aggregate in the electrolytic cell 37 moves to the first anaerobic filter tank 5.

2 is a diagram showing a detailed configuration of the electrolytic cell 37 and its vicinity. Referring to FIG. 2, the treated water sent from the first conveying pipe 24 flows into the inlet port 46 of the electrolytic cell 37. The third diffuser 40 is provided in the vicinity of the electrodes 41 and 42. The third diffuser 40 supplies air in the vicinity of the electrodes 41 and 42.

A lid 35 covering the outlet 47 is connected to the rich man 35. Moreover, the lid 35 covers the discharge port 47 so that opening and closing is possible by connecting the lower end to the discharge port 47 with the joint 34. Here, when the lid 36 is in the open state with respect to the water level of the first anaerobic tank 5, the solution in the first anaerobic tank 5 flows into the electrolytic cell 37 through the outlet 47. The water level which does not become a water level is made into the water level 100A, and the water level which flows into the electrolyzer 37 through the discharge port 47 is made into the water level 100B.

When the water level of the first anaerobic filter tank 5 is the water level 100A, since the rich 35 is located at the position indicated by the reference numeral 35A in FIG. 2, the cover 36 is the discharge port indicated by the reference numeral 36A. 47) is opened. On the other hand, when the water level of the first anaerobic filter tank 5 is the water level 100B, the rich man 35 is in a state in which the discharge port 47 indicated by the symbol 35B in Fig. 2 is closed. Therefore, in this embodiment, the scum which is mixed in the daily waste water which flows in from the inflow port 6 by the discharge port 47 covered with the cover 36 and the cover 36 connected to the rich 35 is provided. ) Can be more surely avoided from flowing directly into the electrolytic cell 37. The above water level 100A is configured such that the solution in the first anaerobic tank 5 flows into the electrolytic cell 37, but the scum and the like in the solution contain a water level that does not flow into the electrolytic cell 37. Can be.

A control unit (not shown) is formed in the electrolytic cell 37, and the control unit includes an opening and closing of the valve 43, a current value flowing through the electrodes 41 and 42, a voltage value of the electrodes 41 and 42, and a third diffuser ( The amount of air discharged from 40) and the polarity of the voltage applied to the electrodes 41 and 42 can be controlled.

The water level sensor 48 is formed in order to detect that the water level of the 1st anaerobic filter tank 5 reached the predetermined water level. The detection output of the water level sensor 48 is input to said control part. Here, the predetermined water level is, for example, the water level that is directly introduced into the electrolytic cell 37 by the daily wastewater flowing in from the inlet 6. When the water level sensor 48 detects that the predetermined water level is reached, the controller can issue a warning by voice, display, or the like. Since the control part is comprised in this way, since the inflow amount of the waste water through the inflow port 6 can be adjusted so that the daily wastewater which flows in from the inflow port 6 into the electrolytic cell 37 may not be introduced directly, the electrolytic cell 37 is more reliably. Inflow of escom can be avoided. The predetermined level may be such that the solution in the first anaerobic filter tank 5 flows into the electrolytic cell 37, but the scum and the like in the solution may be a water level that does not flow into the electrolytic cell 37.

The person who performs maintenance of the sewage treatment system of this embodiment judges whether the household wastewater which flowed in from the inlet port 6 into the electrolyzer 37 directly flowed in according to whether the said warning was given or not. can do. Therefore, in the case where the lid 35 and the rich man 6 are not provided, it is possible to judge whether or not scum is deposited in the vicinity of the electrodes 41 and 42 by the presence or absence of a warning. The necessity of cleaning can be easily determined.

In addition, when the water level sensor 48 detects that the predetermined water level has been reached, the controller may control to increase the supply amount of air from the third diffuser 40. When the controller performs such control, the scum is discharged out of the electrolytic cell 37 by increasing the amount of air supplied from the third diffuser 40 even when scum flows in the vicinity of the electrodes 41 and 42. Can be. Thereby, scum can be avoided more reliably from accumulating in the vicinity of the electrodes 41 and 42.

In other words, in the present embodiment described above, if the combination of at least one of the rich 35 and the lid 36 or one of the water level sensors 48 is provided, the scum is the electrodes 41 and 42. It is possible to avoid deposition in the vicinity.

The electrodes 41 and 42 are attached to the electrode support parts 41A and 42A, respectively. The electrode support portions 41A and 42A are positioned above the electrodes 41 and 42 and are supported by the supporting rods 37A and 37B described below so as not to be immersed in the treated water in the electrolytic cell 37. 3, the structures of the electrodes 41 and 42 and the electrode support parts 41A and 42A are shown. 4, the electrode 41, 42 and the electrode support part 41A, 42A show the state combined in order to be mounted on the electrolytic cell 37. In addition, in FIG.

3 and 4, the upper portions of the electrodes 41 and 42 are screwed to the electrode support portions 41A and 42A, respectively. 41 A of electrode support parts are equipped with the spacer 405 in the surface which should oppose 42 A of electrode support parts. The electrode support portion 41A and the electrode support portion 42A are combined and fixed to face each other with the spacer 405 interposed therebetween, as shown in FIG. By appropriately adjusting the width of the spacer 405, the distance between the electrode 41 and the electrode 42 is adjusted.

Here, the structure of the electrode support part 41A, 42A is demonstrated. 5 is a perspective view of the electrode support portion 41A. 41 A of electrode support parts contain the wiring for connecting the power supply device 38 and the electrode 41 to it. One end of the wiring is a connector 410, and the other end is a connector 411. The electrode 41 is electrically connected to the connector 410 by screwing to 41 A of electrode support parts. In addition, the connector 411 is electrically connected to the power supply device 38. Thereby, the electrode 41 is electrically connected to the power supply device 38 by screwing to 41 A of electrode support parts. Moreover, 42 A of electrode support parts also have two connectors similarly to 41 A of electrode support parts, and contain wiring. And the electrode 42 is electrically connected to the power supply device 38 by screwing to 42 A of electrode support parts.

Since the electrodes 41 and 42 and the electrode support portions 41A and 42A are configured in this manner, in the sewage treatment system of the present embodiment, the wiring connecting the electrodes 41 and 42 and the power supply device 38 is within the treated water. Can be avoided. Moreover, the connector which is these connection parts can be prevented from being immersed in the process water.

6 is a perspective view of the electrolytic cell 37. In the upper part of the electrolytic cell 37, two support bars 37A and 37B are provided at predetermined intervals. The electrode support parts 41A and 42A are provided on the electrolytic cell 37 by arrange | positioning the lower left and right sides on the support bars 37A and 37B. In other words, in this state, the electrodes 41 and 42 are fitted to the supporting rods 37A and 37B, respectively.

In the electrolytic cell 37, it is supported by one electrode support part so that position shift of the electrodes 41 and 42 may not generate | occur | produce, and a notch part can be further provided. In FIG. 7, the electrode support part which can support the electrodes 41 and 42 and is equipped with the notch part is shown.

The electrode support portion 450 is provided with cutouts 451 on which both upper and lower surfaces of the electrodes 41 and 42 can be fitted. The upper parts of the electrodes 41 and 42 are fitted into the notches 451, respectively, and are screwed. Thereby, since the position of the electrodes 41 and 42 in the electrolytic cell 37 is fixed more reliably, distribution of iron ion in the electrolytic cell 37 is stabilized. Therefore, in the electrolytic cell 37, the reaction of Formula (4) occurs stably. Thereby, the sewage treatment capability of the sewage treatment apparatus of this embodiment is stabilized. In addition, when the electrode support part 450 is provided on the electrolytic cell 37, the lower surface of the right end 450A and the left end 450B is in contact with the support bars 37A, 37B. Thus, the electrodes 41 and 42 are fitted to the supporting rods 37A and 37B in the state provided in the electrolytic cell 37, respectively.

When the electrode support part 450 and the electrodes 41 and 42 are unitized and transported, it is preferable to be accommodated in a case and transported, as shown in FIG. In detail, the unitized electrode support part 450 and the electrodes 41 and 42 are accommodated in the case 460 so that the part of the electrodes 41 and 42 may fit in the case 460. In addition, when accommodated, the right end 450A and the left end 450B of the electrode support part 450 are screwed to the case 460 by screws 461 and 462, respectively.

(2nd embodiment)

Next, embodiment of this invention is described. In addition, each sewage treatment apparatus in the second to sixth embodiments focuses on the removal of phosphorus compounds in the sewage, and can be used alone or in a treatment tank for accommodating anaerobic microorganisms such as an anaerobic filter. It can also be used in combination.

With reference to FIG. 9, the activated sludge tank 61 accommodates activated sludge, and is comprised so that wastewater may be sent from another apparatus etc. via the inflow port 69. As shown in FIG. At the bottom of the activated sludge tank 61, a first diffuser 62 is formed. The first diffuser 62 is connected to the first blower 65 and discharges air supplied from the first blower 65 from the air outlet. As a result, the inside of the activated sludge tank 61 is kept in an aerobic state, and the treated water is aerobicly decomposed into an aerobic microorganism, and the ammonia nitrogen is decomposed into nitrate nitrogen by the digestion action.

One end of the circulation pipe 63 is inserted into the activated sludge tank 61. The treated water in the activated sludge tank 61 is sent to the electrolytic cell 70 through the circulation pipe 63 by the pump 64. In addition, the supernatant of the treated water in the activated sludge tank 61 is sent to the settling tank 67 through the advection pipe 77.

The electrolytic cell 70 is equipped with the electrodes 71 and 72, and these can be comprised with iron or aluminum. The electrodes 71 and 72 are connected to the power supply device 73 via the wiring 73A, and supply iron ions or aluminum ions to the electrolytic cell 70 by being electrolyzed. And by supplying such metal ion, in the electrolytic cell 70, a phosphorus compound aggregates according to said Formula (4), for example. The second diffuser 74 is formed below the electrodes 71 and 72 of the electrolytic cell 70. The 2nd diffuser 74 is connected to the 2nd blower 66, and discharges the air supplied from the 2nd blower 66 to the electrode 71, 72 vicinity from the air blower outlet. Below the second diffuser 74, a valve 75 is formed. The valve 75 is formed to be openable and close, and is normally closed. However, the valve 75 is appropriately opened in order to discharge the sludge and aggregates in the electrolytic cell 70 to the activated sludge tank 61.

The activated sludge tank 61 is provided with a magnet 61A. And the aggregate of the phosphorus compound which generate | occur | produced in the electrolytic cell 70 is adsorb | sucked to 61 A of magnets. Thereby, in the sewage treatment apparatus in this embodiment, the phosphorus compound in the treated water can be removed more reliably. The aggregate of the phosphorus compound is considered to be adsorbed to the magnet 61A in an oxidized form. And in this embodiment, the adsorption means which consists of a magnetic member is comprised by 61 A of magnets.

The electrodes 71 and 72 are supported by the electrode support parts 71A and 72A which have the same shape as the electrode support parts 41A and 42A similarly to the said electrodes 41 and 42 above.

The electrode support parts 71A and 72A also have two connectors similarly to the electrode support parts 41A and 42B, and each contain the wiring 73A.

In addition, the electrode support portions 71A and 72A are also provided with cutout portions into which the upper portions of the electrodes 71 and 72 can be inserted, similarly to the electrode support portions 450.

In addition, the activated sludge tank is sent together with the treated water from the activated sludge tank 61 to the electrolytic cell 70 of the present embodiment. The reaction product according to the above formula (4) aggregates relatively easily around the activated sludge from the activated sludge tank 61, and each aggregate becomes large. Therefore, since the reaction product according to the above formula (4) is likely to settle as aggregates, even when the treatment period in the electrolytic cell 70 is prolonged, the electrolytic reactions of the electrodes 71 and 72 occur relatively quickly. . In addition, the distance between the electrodes 71 and 72 is preferably 2 cm or more in consideration of the size of the sludge.

In addition, in the settling tank 67, the supernatant of the sent treatment water is discharged through the discharge port 78. On the other hand, sludge 68 is deposited at the bottom of the settling tank 67. The sludge 68 of the settling tank 67 is periodically removed.

According to the sewage treatment apparatus of this embodiment, since the magnet 61A is provided, it is possible to achieve a high removal rate of phosphorus compound of about 90 to 95%, depending on the scale of the apparatus.

(Third embodiment)

Next, a third embodiment of the present invention will be described.

Referring to FIG. 10, the activated sludge tank 81 is configured to receive activated sludge and to send filthy water from another apparatus or the like through the inlet port 89. At the bottom of the activated sludge tank 81, a first diffuser 82 is formed. The first diffuser 82 is connected to the first blower 85 and discharges the air supplied from the first blower 85 from the air outlet.

One end of the circulation tube 83 is inserted into the activated sludge tank 81, and the treated water in the activated sludge tank 81 is sent to the electrolytic cell 90 through the circulation tube 83 by the pump 84. Lose. Moreover, in the activated sludge tank 81, the advection tube 98 provided with the membrane 97 in the tip part is formed so that the part of the membrane 97 may be submerged in the activated sludge tank 81. As shown in FIG. The treated water in the activated sludge tank 81 is discharged out of the activated sludge tank 81 by the pump 87 via the membrane 97, through the inside of the airflow pipe 98. As the membrane 97, for example, a flat membrane or a hollow fiber membrane having a diameter of about 0.05 to 1 μm can be used.

The electrolytic cell 90 is equipped with the electrodes 91 and 92, These can be comprised with iron or aluminum. The electrodes 91 and 92 are connected to the power supply apparatus 93, and iron or aluminum ions are supplied to the electrolytic cell 90 by these electrolysis. The second diffuser 94 is formed below the electrodes 91 and 92 of the electrolytic cell 90. The second diffuser 94 is connected to the second blower 86 and discharges the air supplied from the second blower 86 to the vicinity of the electrodes 91 and 92 from the air outlet. Below the second diffuser 94, a valve 95 is formed. The valve 95 is formed to be openable and close, and is normally in a closed state. However, the valve 95 is appropriately opened for discharging sludge or aggregates in the electrolytic cell 90 to the activated sludge tank 81. Sludge is deposited at the bottom of the activated sludge tank 81, but the sludge is regularly removed.

The electrodes 91 and 92 are supported by the electrode support part (not shown) which the upper part has the same shape as the electrode support parts 41A and 42A similarly to the said electrode 41 and 42.

The film 97 is also attached to the magnet 97A. Here, the structures of the film 97 and the magnet 97A will be described in detail. 11 is a side view of the film 97 and the magnet 97A.

10 and 11, the magnet 97A has a donut shape. And the film 97 is attached so that the hole of the center of magnet 97A may be covered from both front and back. 12 is a partial perspective view of the magnet 97A. An opening is formed in the upper portion of the magnet 97A, and one end of the advection tube 98 is connected to the opening. That is, in the sewage treatment apparatus of the present embodiment, the treated water has arrived to the vicinity of the magnet 97A. Is introduced into the adduct pipe 98 through the membrane 97.

In the present embodiment, since the magnet 97A is formed in the vicinity of the film 97, the aggregate of the phosphorous compound is adsorbed by the magnet 97A and the arrival of the film 97 is suppressed, so that the film 97 is blocked. Can be suppressed.

This embodiment is considered to have changed the precipitation tank 67 in the second embodiment into a membrane 97. As a result, the sewage treatment apparatus can be made more compact.

In addition, in this embodiment, the removal rate of 90% or more of high phosphorus compound can be achieved by providing the magnet 97A and filtering the process water by the membrane 97.

In this embodiment described above, the magnet 97A constitutes a suction means made of a magnetic member. The membrane 97 constitutes a filter for filtering the treated water in the activated sludge tank. In addition, in this embodiment, although the magnet 97A and the film 97 are integrally formed, this invention is not necessarily limited to such a structure. It is preferable that they are formed integrally, but they are not necessarily formed integrally as long as they are formed near each other.

(4th Embodiment)

Next, a fourth embodiment of the present invention will be described.

Referring to Fig. 13, the activated sludge tank 101 is divided into a portion accommodating activated sludge and a portion not accommodating by the separator plate 107. In addition, since the separation plate 107 is not connected to the activated sludge tank 101 and there is a gap, the treated water and the sludge can be moved. Moreover, the activated sludge tank 101 is comprised so that wastewater may be sent from another apparatus etc. via the inlet port 109. FIG. At the bottom of the activated sludge tank 101, a first diffuser 102 is formed. The first diffuser 102 is connected to the first blower 105, and discharges air supplied from the first blower 105 from the air outlet.

One end of the circulation pipe 103 is inserted into the activated sludge tank 101. The treated water in the activated sludge tank 101 is sent to the electrolytic cell 110 via the circulation pipe 103 by the pump 104. In addition, the supernatant of the treated water in the activated sludge tank 101 is discharged out of the activated sludge tank 101 through the discharge port 118.

The electrolytic cell 110 is equipped with the electrodes 111 and 112, and these can be comprised with iron or aluminum. The electrodes 111 and 112 are connected to the power supply device 113, and iron or aluminum ions are supplied to the electrolytic cell 110 by these electrolysis. The second diffuser 114 is formed below the electrodes 111 and 112 of the electrolytic cell 110. The 2nd diffuser 114 is connected to the 2nd blower 106, and discharges the air supplied from the 2nd blower 106 to the electrode 111, 112 vicinity from the air blower outlet. Below the second diffuser 114, a valve 115 is formed. The valve 115 is formed to be openable and close, and is normally in a closed state. However, the valve 115 is appropriately opened to discharge the sludge or aggregates in the electrolytic cell 110 to the activated sludge tank 101.

A magnet 107A is attached to the surface of the partition plate 107 on which the activated sludge is not accommodated. By the magnet 107A, the aggregate of the phosphorus compound in the aggregate in the electrolytic cell 110 can be collected efficiently.

As in the present embodiment, by adsorbing and collecting agglomerates of phosphorus compounds on the magnet 107A, the phosphorus compounds in the treated water can be collected in a form that can be easily reproduced. As a result, in recent years when depletion of phosphorus is a serious situation, it can be said that the sewage treatment apparatus of this embodiment can contribute to the high efficiency of phosphorus regeneration.

The sewage treatment apparatus of the present embodiment described above has a configuration in which a sedimentation tank 67 is formed in the active sludge tank 61 of the sewage treatment apparatus shown in FIG. 9 by forming the separator plate 107.

In addition, according to the sewage treatment apparatus of this embodiment, although the removal rate is high, about 90 to 95% can be achieved, depending on the scale of the apparatus.

(5th Embodiment)

Next, a fifth embodiment of the present invention will be described.

With reference to FIG. 14, since the whole structure of the sewage treatment apparatus in this embodiment is substantially the same as the structure of the sewage treatment apparatus shown in FIG. 9, the same reference is common to the component common to the sewage treatment apparatus shown in FIG. Numbered, the description is not repeated.

In the sewage treatment apparatus of the present embodiment, the treated water in the activated sludge tank 61 is sent to the electrolytic cell 70 through the circulation pipe 63 by the pump 64. The supernatant of the electrolytic cell 70 is sent to the settling tank 67 through the outflow pipe 76. Then, the supernatant of the settling tank 67 is discharged from the discharge port 78 to the outside of the wastewater treatment apparatus.

A magnet 67A is provided in the outflow pipe 76 in the settling tank 67. Thereby, the aggregate of the phosphorus compound which generate | occur | produced in the electrolytic cell 70 can be made to adsorb | suck to the magnet 67A more efficiently, and in the form isolate | separated from another aggregate and sludge. Therefore, it is considered that the sewage treatment apparatus of the present embodiment can contribute to higher efficiency of phosphorus regeneration than the fourth embodiment.

(6th Embodiment)

Next, a sixth embodiment of the present invention will be described.

With reference to FIG. 15, since the whole structure of the sewage treatment apparatus in this embodiment is substantially the same as the structure of the sewage treatment apparatus shown in FIG. 13, it is the same in the components common to the sewage treatment apparatus shown in FIG. The description is repeated with reference numerals.

In the sewage treatment apparatus of the present embodiment, the activated sludge tank 101 receives the regions and the electrodes 111 and 112 which receive the activated sludge in order from the inlet port 109 by the separating plates 107 and 150. It is divided into the area | region to make, and the area which precipitates sludge 108.

The treated water sent from the inlet 109 is accommodated in a region for receiving sludge in the activated sludge tank 101, and the supernatant liquid in the region is sent to a region for accommodating the electrodes 111 and 112.

The treated water and aggregates below the region accommodating the electrodes 111 and 112 are sent to the region in which the sludge 108 is settled, and the supernatant liquid in the region is activated via the discharge port 118. ) Exhausted out.

In addition, a magnet 150A is provided on the wall surface of the separator plate 150 on the region side where the sludge 108 is allowed to settle. Thereby, the aggregate of the phosphorus compound produced in the area accommodating the electrodes 111 and 112 can be adsorbed to the magnet 150A more efficiently and in a form separated from other aggregates and sludge.

The treated water discharged out of the activated sludge tank 101 is preferably sent to an anaerobic filter tank (tank containing an anaerobic microorganism) separately formed.

In the activated sludge bath 101, the side wall including the area for depositing the sludge 108 is inclined in order to facilitate the transfer of the sludge 108 to the area for receiving the activated sludge.

(7th Embodiment)

The sewage treatment apparatus of this embodiment is a sewage treatment apparatus of the type which can integrate a manhole and an electrode. The sewage treatment apparatus of the present embodiment shown in FIG. 16 changes only the configuration of the manhole 28 and the peripheral portions of the electrodes 41 and 42 from the sewage treatment apparatus shown in FIG. The same components as those of the apparatus are given the same reference numerals, and the description thereof will not be repeated.

With reference to FIG. 16, the upper part of the sewage treatment apparatus is covered with a plurality of manholes 28. Moreover, the electrodes 41 and 42 are attached to the manhole 28 via the insulator 400. Here, with reference to FIG. 17, the mounting aspect of the electrodes 41 and 42 to the insulator 400 is demonstrated.

In the sewage treatment apparatus of the present embodiment, the electrodes 41 and 42 are attached to the manhole 28 via the insulator 400. In detail, the electrodes 41 and 42 are attached to the insulator 400 by screwing or the like. Then, the insulator 400 on which the electrodes 41 and 42 are mounted is attached to the manhole 28 by screwing or the like. The connecting lines 402 are connected to the electrodes 41 and 42, respectively, and are connected to the power supply device 38. In this way, the worker can pull out the electrodes 41 and 42 to the ground without going into the basement by operating the wave 28A of the manhole 28 and removing the manhole 28 from the ground. In other words, the maintenance of the electrodes 41 and 42 becomes very easy compared with the wastewater treatment apparatus of other embodiment.

In the sewage treatment apparatus of the present embodiment, the electrodes 41 and 42 are immersed in the treated water, but the insulator 400 is configured not to be immersed in the treated water. In addition, in the insulator 400, a connecting line having a connector at both ends can be accommodated so that one end of the connector can be connected to the power supply device 38, and the other end of the connector can be connected to the electrode 41 or the electrode 42. In this way, the connection between the electrodes 41 and 42 and the power supply device 38 can be avoided from being submerged in the treated water. In other words, it is possible to avoid corrosion of the connection portion.

In addition, as in the present embodiment, when the electrodes 41 and 42 are attached to the manhole 28, the position of the electrodes 41 and 42 in the sewage treatment apparatus tends to be higher than the position of the electrode in other embodiments. There is this. When the positions of the electrodes 41 and 42 are high, even if voltages are applied to the electrodes 41 and 42 without the electrodes 41 and 42 being submerged in the treated water, iron ions or aluminum ions are not supplied. Therefore, in this embodiment, by detecting the voltage value between the electrodes 41 and 42 by the detection part 38A, it can be judged whether the electrodes 41 and 42 are immersed in the process water. The sewage treatment apparatus of the present embodiment includes means for notifying the meaning when the voltage value between the electrodes 41 and 42 indicates a value at which the electrodes 41 and 42 are not immersed in the treated water. It is preferable to be.

(8th Embodiment)

In the sewage treatment system shown in FIG. 18, the same components as those in the sewage treatment apparatus system (see FIG. 1) described in the first embodiment are denoted by the same reference numerals, and redundant description thereof will not be repeated. In addition, in FIG. 19, the member shown in FIG. 18 is abbreviate | omitted.

With reference to FIG. 18 and FIG. 19, the sewage treatment system of this embodiment is mainly comprised by the tank 200. As shown in FIG. The inside of the tank 200 is the first anaerobic filter tank 5 by the 1st partition wall 2, the 2nd partition wall 3, the 3rd partition wall 4, and the 4th partition wall 20, It is divided into a second anaerobic filter tank 10, a contact aeration tank 14, a settling tank 19 and a disinfection tank 21. In addition, in the tank 200 of this embodiment, instead of forming the 3rd air flow pipe 29 and the 1st pump 18 in the tank 1 shown in FIG. 1, the lower end of the 3rd division wall 4 is carried out. This is insulated from the bottom of the tank 200. Thereby, in the tank 200, the process water aerobic-decomposed in the contact aeration tank 14 is supplied to the process water tank 19. FIG.

The upper end of the first diffuser 16 is connected to the first blower 17. In addition, the lower end of the 1st diffuser 16 is formed so that the inner periphery side may be rounded slightly rather than the outer periphery of the bottom face of the contact aeration tank 14 (refer FIG. 19). On the lower surface side of the first diffuser 16, a plurality of holes (holes 16a: see FIG. 19) are formed. And when air is sent from the 1st blower 17, this air is discharged | emitted as a bubble from this hole. Moreover, since a hole is formed in the lower surface side of the 1st diffuser 16, a sludge is less likely to enter inside than when the hole is formed in an upper surface or a side surface.

The pump 133 is provided in the lower part of the contact aeration tank 14. Moreover, the sludge conveyance path 134 is connected to the upper side of the pump 133, and the sludge conveyance path 135 is connected to the upper end of the sludge conveyance path 134 as it extends to the left side of the figure. . As a result, the sludge generated in the contact aeration tank 14 is sent to the first anaerobic filter tank 5.

In the tank 200 of FIG. 18, the settling tank 19 and the 1st anaerobic filter tank 5 are connected through the 1st conveyance pipe 24. The 1st conveyance pipe 24 is equipped with the 2nd diffuser 25 inside. The 2nd diffuser 25 is connected to the 2nd blower 26, and the blowing hole for blowing air is formed. And the 2nd diffuser 25 blows off the air supplied from the 2nd blower 26 from this blowing hole, and transmits the process water in the settling tank 19 through the 1st conveyance pipe 24 to 1st. Sent to anaerobic treatment (5).

In addition, an electrolytic unit including a case 54 is formed on the upper portion of the contact aeration tank 14. In detail, the case 54 is a hollow body to which four perpendicular | vertical board bodies were connected. Electrode pairs 51 and 52 are formed inside the case 54. The electrode pairs 51 and 52 are connected to the power supply 57, respectively. In addition, a third diffuser 53 is formed inside the case 54. The third diffuser 53 is connected to the fourth blower 56.

In the case 54, metal ions, such as iron ions and aluminum ions, are eluted by the electrolysis (appropriately weak) reaction in the electrode pairs 51 and 52. As a result, in the contact aeration tank 14, the eluted metal ions and the phosphorus compound in the treated water react, and metal salts which are poorly soluble in water are generated and aggregate. As an example of reaction of a metal ion and a phosphorus compound, said formula (4) is mentioned.

Here, the structure of the electrode pair 51 is demonstrated in detail, referring FIG. 20 and FIG. 20 is a perspective view of the electrode pair 51. 21 is a perspective view at the time of breaking the electrode pair 51 partially.

The electrode pair 51 includes two metal plates of the electrodes 711 and 712. This metal plate consists of iron and aluminum, for example. In addition, the electrode pair 51 includes a support 710. The handle 710A is mounted on the upper portion of the support 710. The cover 713 is attached to the left side of the support 710. In detail, six screw holes are formed in the cover 713, and the cover 713 is mounted on the left side of the support 710 by screwing each screw hole with a predetermined screw. The cover 713 is equipped with electrodes 711 by nuts 711A and 711B. The screw holes include screw holes 713A, 713B (see FIG. 22), 713C, 713D, and 713E. In addition, the predetermined screws include the screws 717A, 717B, 717C, and 717D shown in FIG. 22.

The guide 719D is attached to the upper back of the support 710, and the wiring 719 protrudes upward from the support 710 in the guide 719D. The guide 719D is cylindrical in shape, and the wiring 719 is formed inside the guide 719D. The connector 719C is connected to one end of the wiring 719.

The other end branch of the wiring 719 from the end (below) than the guide 719D is built in the combination of the support and the cover 713. In addition, the wiring 719 contains a plurality of wirings (including the wiring 719A to be described later). The other end of the wiring 719 is in a state in which terminals such as a terminal 718 (see FIG. 22) described later are attached to each of the plurality of nested wirings.

Here, FIG. 22 and FIG. 23 show partially broken exploded perspective views of the electrode pair 51. In addition, in FIG. 23, the wiring 719, the connector 719C, the wiring 719A, and the terminal 718 are abbreviate | omitted for convenience.

22 and 23, between the cover 713 and the support 710, the electrode fixing jig 715, 716 which consists of iron, stainless steel, etc. is provided. The electrode fixing jig 715,716 is a conductor, and it is preferable that it is comprised from the material which is hard to corrode.

The electrode fixing jig 715 is a plate body in which protrusions 715A and 715B are formed. The projections 715A and 715B are configured to penetrate the holes formed in the cover 713. The electrodes 711 are mounted to be electrically connected to the protrusions 715A and 715B by the nuts 711A and 711B.

The terminal 718 is provided between the electrode fixing jig 715 and the electrode fixing jig 716 slightly behind the center of the support 710. The terminal 718 constitutes an end of the wiring 719A. The wiring 719A is one of the plurality of wirings included in the wiring 719.

The terminal 718 is disposed at a position in contact with the protrusion 715A when the electrode fixing jig 715 is mounted on the cover 713 and the cover 713 is mounted on the support 710. . As a result, the electrode 711 is electrically connected to the terminal 718 via the protrusion 715A.

In the electrode fixing jig 716, the same projections as those of the projections 715A and 715B are formed. This protrusion protrudes on the left side surface of the support body 710. Moreover, a terminal separate from the terminal 718 is provided between the electrode fixing jig 715 and the electrode fixing jig 716 slightly ahead of the center of the support 710. The other terminal mentioned here comprises the terminal of the wiring different from the wiring 719A among the plurality of wirings included in the wiring 719. And this other terminal is electrically connected to the projection part formed in the electrode fixing jig 716, and this projection part is connected to the electrode 712. As shown in FIG. Thereby, this other terminal and the electrode 712 are electrically connected.

Although not shown, an insulator is provided between the electrode fixing jig 715 and the electrode fixing jig 716, between the terminal and the terminal 718. Thereby, the short circuit of the electrode 711 and the electrode 712 can be reliably avoided inside what the support body 710 and the cover 713 combined.

The electrode fixing jig 715 is screwed to the cover 713 by screws 714A, 714B, and 714C. In addition, the electrode fixing jig 716 is screwed to the support body 710 by screws 714D, 714E, and 714F.

The padkin 710B is formed between the support body 710 and the cover 713 outside the place where the cover 713 is screwed. Moreover, the padkin 710C is formed between the support body 710 and the electrode fixing jig 716 outside the place where the electrode fixing jig 716 is screwed. Also, between the cover 713 and the electrode fixing jig 715, the same padkin as the padkin 710C is formed outside the place where the electrode fixing jig 715 is screwed.

Thereby, when the support body 710 and the cover 713 are combined, the support body 710 and the cover 713 can contain the terminal 718 and the said other terminal so that water may not enter inside.

(Ninth embodiment)

24A is a left side view of the electrode and each member disposed around the electrode in the electrolytic unit of the ninth embodiment, and FIG. 24B is a plan view of each member.

The upper end of the electrode 260 is attached to the support 261. Inside the support 261, a pressing plate 263 for pressing back and forth on the upper end of the electrode 260 is provided. The press plates 263 have terminals 267 and 268 embedded therein.

Moreover, the handle 262 is attached to the upper part of the support body 261.

One end of the wiring 278 is connected to a predetermined power source. In addition, the wiring 278 is incorporated in the handle 262, the support 261, and the pressing plate 263. The other end of the wiring 278 is connected to the terminal 267. And the electrode 260 is electrically connected to the said predetermined power supply by the electrode 260 electrically connected to the terminal 267 in the support body 261.

Moreover, the padkin 264 is formed between the support body 261 and the electrode 260 so that the lower end of the press plate 263 may be in contact. The padkin 264 covers the outer periphery of the electrode 260. As a result, sewage is prevented from entering the space inside the support 261 where the terminals 267 and 268 exist.

The diffuser 271 is formed so as to cover the left side, the lower surface, and the right side of the electrode 260. The terminal of the diffuser 271 is "U" shaped, and the upper left end is connected to the pump 256. In addition, a cover 277 is attached to the upper right end of the diffuser 271.

A plurality of holes 271A are formed in the lower surface of the diffuser 271. Thus, when air is supplied from the fourth blower 256, the diffuser 271 discharges bubbles from the holes 271A. When electric power is supplied to the electrode 260 and the electrode 260 or another electrode is electrolyzed, the bubbles formed on the surface of the electrode 260 are removed by this bubble. The diffuser 271 is also fixed to the support 261.

The diffuser 271 is equipped with fixing members 272 to 276 that are members for fixing the electrode 260 to the diffuser 271.

25 is a diagram schematically showing an electrolytic unit of this embodiment. Referring to FIG. 25, the diffuser 271 is connected to the fourth blower 256 via a pipe connector 361 and an air feeder 360. In this embodiment, the diffuser 271 can be removed from the fourth blower 256 by rotating the pipe connector 361.

In the electrolytic unit of the present embodiment, since the diffuser 271 can be removed from the fourth blower 256 (pump), the diffuser 271 can be sufficiently cleaned. Thereby, the situation where sludge is clogged in the hole 271A and a sufficient quantity of air bubbles are not discharged from the hole 271A can be avoided. Therefore, in the present embodiment, there is no fear that the film removal on the surface of the electrode 260 is inhibited by the clogging of the holes 271A.

In addition, the electrode 260 is submerged in the treated water W in the electrolytic cell 270. In addition, although illustration is abbreviate | omitted, the mechanism for discharging the precipitation which generate | occur | produced based on electrolysis, such as the electrode 260, out of the electrolytic cell 270 is suitably formed in the electrolytic cell 270.

Moreover, the fasteners 270A and 270B for fixing the support body 261 with respect to the electrolytic cell 270 are attached to the electrolytic cell 270. In addition, in the present invention, if the diffuser 271 can be removed from the pump 256 (that is, detachably mounted freely), the diffuser 271 must be fixed to the support 261. There is no.

Here, with reference to FIG. 26, the mounting aspect of the electrode 260 to the support 261 is demonstrated. In addition, FIG. 26 is corresponded in the figure which partially showed the left side surface of each member shown to FIG. 24 (a) and FIG. 24 (b). The electrode 260 is attached to the support 261 and the diffuser 271 from the rear side, and is attached to the position indicated by the dashed-dotted line P. As shown in FIG. The electrode 260 is fixed to the support with a predetermined screw or the like. In the electrode 260 and the support 261, holes 260A and 261A for passing these screws are formed, respectively.

In this embodiment described above, one electrode was supported by the support 261. In addition, the electrolytic reaction usually occurs with two electrodes. From this, it is also conceivable to support two electrodes with one support 261. 27 (a) and 27 (b), as a modification of the present embodiment, an electrode and a member disposed around the electrode in an electrolytic unit in the case where the support 261 supports two electrodes. Indicates. FIG. 27A is a left side view of these members, and FIG. 27B is a plan view of these members.

Electrodes 260 and 160 are attached to the support 261. In addition to those shown in Figs. 24A and 24B, a holding plate 363 is provided inside the support 261 for pressing the front and rear of the upper end of the electrode 360. The press plate 363 has a terminal (including the terminal 368) corresponding to the terminals 267 and 268. By this terminal, the electrode 360 and the wiring 378 are electrically connected. Moreover, the handle 262 is attached to the upper part of the support body 261. In addition, the support 261 and the handle 262 have about twice the inner dimension compared with those shown in Figs. 24 (a) and 24 (b).

An insulator 300 is fitted in the middle portion of the support 261 and the handle 262 in the inward direction. Thereby, the terminal connected to the terminals 267 and 268 and the electrode 360 can be prevented from being electrically connected. One end of the wiring 378 is connected to a predetermined power supply. The insulator 300 is fixed by a screw 311 fitted to the handle 262.

The padkin 364 (corresponding to the padkin 264) is formed to be in contact with the lower end of the pressing plate 363. The padkin 364 partially covers the outer circumference of the electrode 360. Thereby, sewage can be avoided from entering the space where the terminal connected to the electrode 360 exists inside the support 261.

The diffuser 371 is formed so as to cover the left side, the lower surface, and the right side of the electrode 360. The diffuser 371 is connected to a pump 256. Similarly to the diffuser 271, the diffuser 371 is also provided with a plurality of holes in the lower surface thereof, and can be removed from the pump 256. The diffuser 371 is also equipped with a member (including the fixing members 372 to 374) for fixing the electrode 360 in the same manner as the diffuser 271.

Further, the electrolytic unit of the present embodiment includes, for each electrolytic cell 270, the first anaerobic filter tank 5, the second anaerobic filter tank 10, the contact aeration tank 14, in the tank 1 shown in Figs. Or it can be comprised so that it may be immersed in the sedimentation tank 19, and metal ion may be supplied to the sewage in each tank.

The embodiment disclosed this time is illustrated at all points and is not restrictive. The scope of the present invention is shown by above-described not description but Claim, and it is intended that the meaning of a claim and equality and all the changes within a range are included.

The sewage treatment apparatus of the present invention can move the electrode to the ground by moving the manhole to the ground, so that the maintenance of the electrode can be performed easily and reliably. Therefore, in the sewage treatment apparatus, it is possible to reliably remove the phosphorus compound based on the electrolytic reaction of the electrode.

In addition, the corrosion of the terminal can be prevented, so that the terminal is corroded and the supply of power to the electrode can be avoided. Further, since the sewage treatment apparatus is continuously used, even if the connecting member is corroded, it is easy to replace.

In addition, according to the present invention, the surface of the electrode can be easily and reliably cleaned by removing the tube from the pump by the air bubble discharged from the tube and removing the tube from the pump. It can be cleaned by the bubbles released from it. Therefore, maintenance work in the sewage treatment apparatus is easy.

Further, in the sewage treatment apparatus of the present invention, phosphorus can be aggregated as a precipitate by metal ions generated by electrolysis of the electrode. In other words, in the sewage treatment apparatus, it is not necessary to form the flocculation tank again.

Claims (10)

A sewage treatment apparatus (1) installed underground to treat sewage, A sewage treatment unit 5 for receiving sewage, An ion supply unit 37 for supplying iron ions or aluminum ions to the sewage treatment unit 5, The ion supply unit (37) is characterized in that it comprises an electrode (41, 42) mounted in the manhole. 2. The sewage treatment apparatus according to claim 1, further comprising detection means (38A) capable of detecting whether the electrode (41, 42) is immersed in the treated water. A sewage treatment apparatus for electrolyzing the electrode by supplying electric power to the electrode 711 from a predetermined power source including an electrode 711, Electrode support members 710 and 713 for supporting the electrode 711; A wiring 719 for connecting the electrode 711 and the predetermined power source; A terminal 718 formed at an end of the wiring 719 at the electrode side; A connection member 715 mounted on the electrode support member, detachable from the electrode support member, and further electrically connecting the terminal and the electrode; The terminal (718) is sewage treatment apparatus which is built in the electrode support member (710, 713) so as not to contact the outside of the electrode support member (710, 713). 4. The sewage treatment apparatus according to claim 3, wherein the electrode support member (710, 713) contains at least a part of the wiring (719). The electrode support members 261 and 262 can support a plurality of electrodes 260 and 360, and between one electrode and another electrode of the plurality of electrodes. Sewage treatment apparatus comprising an insulator (300) disposed in the. A sewage treatment apparatus for electrolyzing the electrode, including an electrode 260, A sewage treatment apparatus characterized by further comprising a tube (271A) formed so as to be connected to a predetermined pump so as to be detached from a predetermined pump, and further discharging bubbles through the hole near the electrode. The method of claim 6, And an electrode support member (261, 262) for supporting the electrode (260) and the tube (271). The method according to claim 6 or 7, The electrode 260 is electrolyzed by supplying electric power from a predetermined power source, A wiring 260 connecting the predetermined power supply and the electrode 260, Further comprising electrode support members (261, 262) for supporting the electrode, And the electrode support member includes at least a part of the wiring. The method according to any one of claims 1, 3, and 6, Anaerobic tanks in which sewage is introduced and anaerobic microorganisms are present (5, 10), An aerobic tank (14) in which sewage is introduced and aerobic microorganisms are present, A sedimentation tank 19 for introducing sewage water to settle sludge, The electrode (260) is sewage treatment apparatus, characterized in that submerged in the sewage of the anaerobic tank, the aerobic tank or the settling tank. The method according to any one of claims 1, 3, and 6, Only sewage water is introduced to further include an electrolytic cell 270 for electrolyzing the electrode 260, And the electrode is immersed in sewage in the electrolytic cell.