DE10040417A1 - Below-ground waste water treatment unit removing phosphorus, includes sacrificial iron or aluminum electrodes providing electrolytic treatment to waste water - Google Patents

Abstract

The waste water treatment unit includes a manhole for inspection, a section (5) for storage and treatment of waste water and a unit supplying Fe or Al ions (37). The latter is fastened to the manhole cover and includes electrodes (41, 42). Preferred features: A detector (38) determines whether the electrodes are in the water or not. Current supply to an electrode decomposes it electrolytically. Wiring to the electrode from a current source, is detachable; the connection in the electrode holding section makes no external contact. The electrode holder accommodates the wire. Several electrodes can be mounted, with suitable insulators. A tube is included, with a hole detachably connected to a pump, to produce bubbles around the electrode. Aerobic tanks (5, 10, 14) receive the waste water and microorganisms contained. A settlement tank (19) removes sludge. The electrode is immersed in the waste water in the anaerobic tank, in the aerobic tank or in the sludge settlement tank. A separate electrolysis tank can be provided for electrolytic decomposition of the electrode immersed in it.

Description

The present invention relates to wastewater treatment treatment device, and more particularly relates to a wastewater treatment handling device containing a phos contained in the waste water separates phosphor component as metal salt, which we in water is not soluble.

With conventional wastewater treatment devices, there are sol with electrodes that are decomposed electrolytically and through the metal ions that result from electrolysis ben, a phosphor composite contained in the treated water Separate the metal salt, which dissolves little in water is.

Referring to FIG. 28 of the upper part is a flat electrode mounted on a holder 901 A 901. FIG. 29 is a perspective view of the bracket 901 A shown in FIG. 28.

A wire is embedded in a side surface of the holder 901 A. Terminals 910 and 911 are connected to both ends of this wire. Terminal 911 is connected to a power source that powers electrode 901 . The terminal 910 is issued on the side surface of the holder 901 A, so that it can be connected to the electrode 901 .

Referring to FIG. 28, the electrode 901 covers the connector 910, when attached to the bracket 901 A.

However, waste water can penetrate into a gap between the holder 901 A and the electrode 901 , so that the connection 910 corrodes.

If the connector 910 is corroded, it adheres to the electrode 901 , which makes replacement of the electrode 901 uncomfortably complicated.

In the event of further corrosion, the connection 910 hinders the power supply to the electrode 901 . However, it is difficult to replace the connector 910 which partially forms the wire. In a conventional wastewater treatment device, therefore, the corroded connection 910 adversely reduces the efficiency of the electrolysis of the electrode 901 .

The conventional wastewater treatment device consists of a tubular member for forming bubbles around the electrode 901 when it electrolytically decomposes. The bubbles formed by the tubular member remove a thin layer formed on the surface of the electrode 901 .

However, substances contained in suspension and penetrated into the tubular component in the wastewater will penetrate, resulting in insufficient formation of the bubbles. Thus, the thin layer formed on the surface of the electrode 901 cannot be removed sufficiently, and the efficiency of the electrolysis of the electrode 901 is disadvantageously reduced.

If the electrolysis efficiency of the electrode 901 is reduced, the waste water treatment device cannot sufficiently remove a phosphorus component from the waste water.

Conventional wastewater treatment devices can be found under be attached to the earth. In general, an operator takes person a manhole cover to make such an underground located waste water treatment device by hand check and repair.

Under the ground, the sewage treatment device can not checked or repaired enough. At the Ab water treatment device not a reliable option offer wastewater treatment. That is also why it is difficult, a coagulated phosphorus compound reliably to remove from the waste water.

Consequently, taking into account the above Circumstances proposed the present invention, the one task is a wastewater treatment device provide that is capable of a phosphorus compound reliably remove waste from wastewater.

The waste water treatment device according to an embodiment form of the present invention is for the treatment of Ab water provided underground and includes a manhole for Inspection of the waste water treatment device, a waste water this storing wastewater treatment part, and an ion supply part, the iron ion or Aluminum ions supplies, while the ion supply part 1 Includes electrode attached to the manhole cover.

So the electrode can be raised above the floor in which the manhole cover is raised, from which it follows that the electrode is easily and reliably serviced that can.

Therefore, the waste water treatment device can be a Phos phosphor component based on an electrolytic reac Remove the electrode reliably.  

The waste water treatment device according to the present The invention preferably further comprises a detector which can determine whether the electrode is immersed in the waste water is or not.

It can thus be prevented that the electrode is not in the Wastewater is immersed.

Therefore, by attaching the electrode to the Manhole cover allegedly caused disadvantage avoided become.

The wastewater treatment device after another off leadership form of the present invention has an electrical de on to this with electricity from a prescribed Power source, which makes the electrode electroly table is decomposed, and further comprises an the electrode holding electrode holding part, a wire for connection the electrode with the prescribed power source, one Connection that is near one end of the wire of the electrode is provided here, and a connecting part that attached to and removable from the electrode holding part is to ver ver the connection with the electrode electrically tie while the connector is in the electrode holder is build so as not to have a part outside the electrodes keep coming into contact.

According to the present invention, it is attached to the wire brought connection built into the electrode holding part not in contact with any part outside of the electrodes holding part to come, and is through the connecting part with connected to the electrode. In other words, it is ver prevents the connector from being exposed, with the removable Connection part to the electrode directly, instead of the An in the wastewater treatment device is closed.  

Therefore, corrosion of the connection can be prevented the. This can prevent the connection from becoming corro diert and the power supply of the electrode is hindered. Even if it is due to the continued use of the Ab water treatment device is corroded, the Ver binding part can be replaced easily.

In the waste water treatment device according to the present Invention preferably takes the electrode holding member at least part of the wire.

So the wire can be compactly arranged so that it is hardly immersed in the water.

In the waste water treatment device according to the present Invention is the electrode holding member preferably in the Able to hold multiple electrodes and preferably comprises an insulator between an electrode and a white tere electrode arranged under numerous electrodes is.

Thus, the electrode holding member can combine the electrodes keep the arrangement without short-circuiting it.

The wastewater treatment device according to yet another Embodiment of the present invention comprises a Electrode that is degraded by electrolysis and has further a tube formed with a hole and with a prescribed pump is removably connected to air bubbles through the hole into a section around the elec trode around.

According to the present invention, the wash from the tube air bubbles brought the surface of the electrode while the pipe can be removed from the pump to without white teres and be washed reliably.  

In the waste water treatment device, the upper can area of the electrode with the bubbles who come out of the pipe.

The waste water treatment device according to the present The invention also preferably includes an electrode holder part that holds the electrode and the tube.

Thus, the pipe held by the electrode holding member can together with the electrode at the same time from the pump taken and washed when the electrode is out exchanged or serviced.

Therefore, the wastewater treatment device can easily res be serviced.

In the waste water treatment device according to the present Invention, the electrode is preferably with current from egg ner prescribed power source supplied to electroly table to be decomposed, the wastewater treatment pre direction preferably also a wire that the pre written power source and the electrode ver binds, and an electrode holding member holding the electrode has, which preferably at least a part of Wire.

So the wire can be compactly arranged so that it is hardly immersed in water.

The waste water treatment device according to the present The invention preferably further includes waste water menden, anaerobic tank, the anaerobic Mi has microorganisms, a wastewater-absorbing aerobic Tank, the aerobic microorganisms inside has, as well as a wastewater settling basin that Wastewater for separating sludge, the  Electrode preferably in the waste water of the anaerobic tank, the aerobic tanks or sedimentation tanks.

Thus, the wastewater treatment device can be used as a phosphor Deposition product coagulates through metal ions that pass through electrolytic decomposition of the electrode are formed. In other words, the wastewater treatment device does not need to be re-equipped with a coagulation tank become.

The waste water treatment device according to the present The invention preferably also consists of only waste water ser receiving electrolysis bath to electro the electrode decompose ly, the electrode preferably in Waste water from the electrolysis bath is immersed.

Thus, the wastewater treatment device can be used as a phosphor Deposition product coagulates through metal ions that pass through electrolytic decomposition of the electrode are formed. In other words, the wastewater treatment device does not need to be re-equipped with a coagulation tank become. The electrolyte bath also only takes the waste water on, and this can prevent electrolysis extremely delayed the electrode by mud or the like is gert.

The previous and other tasks, characteristics, execution Forms and advantages of the present invention from the following detailed description of the present the invention more clearly when in conjunction with the accompanying drawings is made.

Show it

Figure 1 shows a waste water treatment system with a waste water treatment device according to a first embodiment of the present invention.

FIG. 2 shows the structure of an electrolysis bath and a part around it, which is shown in detail in FIG. 1;

Fig. 3 shows the structure of the electrodes and the electrode holding parts shown in Fig. 1;

Fig. 4 shows the electrodes and electrode holding parts shown in Fig. 3, which are combined to be attached to the electrolytic bath;

Fig. 5 is a perspective view of one of the electrode holding parts shown in Fig. 3;

FIG. 6 is a perspective view of the electrolysis bath shown in FIG. 1;

Fig. 7, an electrode holding member which can hold two electrodes and having Ausklinkungsabschnitte;

Fig. 8 with each other to form a unit assembled electrodes, and the electrode holding part, which are accommodated in egg nem housing;

Fig. 9 shows a waste water treatment device according to a two-th embodiment of the present invention;

Fig. 10 shows a waste water treatment device according to a third embodiment of the present invention;

Fig. 11 is the side view of a membrane and a magnet, which are shown in Fig. 10;

Fig. 12 is a partial perspective view of the magnet shown in Fig. 10;

FIG. 13 is a manure wastewater treatment apparatus according to a fourth embodiment of the present OF INVENTION;

FIG. 14 is a manure wastewater treatment apparatus according to a fifth embodiment of the present OF INVENTION;

FIG. 15 is a waste water treatment apparatus according to a sixth embodiment of the present invention;

FIG. 16 is a waste water treatment apparatus according to a dung they Benten embodiment of the present OF INVENTION;

Fig. 17 is a diagram illustrating a manner of attaching the electrodes shown in Fig. 16 to manhole covers;

FIG. 18 is a view in longitudinal section of a development system with a Abwasserbehand Abwasserbehandlungsvorrich processing according to an eighth embodiment of the front lying invention;

. Fig. 19 is a cross-sectional view of a presented in Fig 18 Darge container;

Fig. 20 is a perspective view of a pair of electrodes shown in Fig. 18;

Fig. 21 is an exploded perspective view showing the pair of electrodes of Fig. 20 in a partially fragmented state;

22 and 23 are partial fragmentary perspective views showing in exploded of the electrode pair shown in Fig. 20.;

24A and 24B, an electrode and components which are arranged around the electrode in an electrolytic unit according to a ninth embodiment of the constricting vorlie invention.

Fig. 25 is typical of the electrolytic unit according to the nine th embodiment of the present invention;

FIG. 26 is a diagram illustrating a manner of fastening the electrode shown in FIG. 24A to a holder;

FIG. 27A and 27B are modifications of the electrode and sharing of construction, which are arranged around the electrode in the elektrolyti rule unit according to the ninth embodiment of the present invention;

Fig. 28 is a perspective view of an electrode attached to a bracket in a conventional sewage treatment device; and

Fig. 29 is a perspective view of the bracket shown in Fig. 28 Darge.

Embodiments of the present Er are now described with reference to the drawings. An ab Water treatment device after each described below Embodiment mainly based on equipment for the treatment of industrial water on a large scale is applied to sewage or industrial wastewater processing is also possible on a small or medium-sized one Domestic water treatment equipment such as a combined domestic cleaning tank applicable. The wastewater treatment averaging device according to each embodiment Phosphorus compound coagulate in the fecal waste water or wastewater, especially from an electroplating factory is.

First embodiment

With reference to FIG. 1, a tank 1 is laid underground. The tank 1 is through a first partition 2 , a second partition 3 and a third partition 4 in a first tank with an anaerobic filter bed 5 , a second tank 10 with an anaerobic filter bed, a contact ventilation tank 14 , a tank 19 for treated water and a disinfection tank 21 divided, which will be described later. The upper part of the tank 1 is covered with several manhole covers 28 .

Fecal waste water flows through an inlet 6 into the first tank 5 with an anaerobic filter bed. In the first tank 5 with an aerobic filter bed different, hardly decomposable substances that are mixed in the absorbed fecal wastewater are separated and separated, while the anaerobic microorganisms adhering to the most anaerobic filter bed 7 degrade the organic compounds contained in the fecal wastewater anaerobically . The first tank 5 with anaero bem filter bed degrades the organic nitrogen contained in the faecal waste water anaerobically to ammonia nitrogen.

A first advection pipe 8 feeds the wastewater which has been broken down in the first tank 5 with an anaerobic filter bed through a first water supply connection 9 to the second tank 10 with an anaerobic filter bed. The first water supply connection 9 leads through an upper section of the first partition 2 .

The above-mentioned first partition 2 separates the second tank 10 with an anaerobic filter bed from the first tank 5 with an aerobic filter bed. A second anaerobic filter bed 11 is arranged in the second tank 10 with an anaerobic filter bed. The second anaerobic filter bed 11 captures the flowing sub punch. Anaerobic microorganisms, which are present in the second tank 11 with an anaerobic filter bed, degrade organic substance anaerobically, so that they produce organic nitrogen. The organic nitrogen is broken down anaerobically in ammonia nitrogen.

A second advection pipe 12 leads the anaerobically degraded wastewater in the second tank 10 with anaerobic filter bed to the contact ventilation tank 14 through the second water supply circuit 13 . The second water supply port 13 passes through an upper portion of the second partition 3 . An injector 32 with an injection opening 31 , which is arranged in the second advection tube 12 , is connected to a third blower 30 . The injector 32 is supplied with air by the third blower 30 , the air being blown out of the injection opening 31 into the second advection tube 12 . Thus, a supply of the waste water from the second tank 10 with an anaerobic filter bed in the contact ventilation tank 14 in the second advection tube 12 is stimulated.

The treated water, which was treated in the second tank 10 with an anaerobic filter bed, flows through the second advection pipe 12 into the contact ventilation tank 14 .

A contact element 15 provided in the contact ventilation tank 14 stimulates the cultivation of aerobic microorganisms. A near the lower part of the contact ventilation tank 14 arranged first air diffusion tube 16 has a number of air openings. The first air diffusion tube 16 is connected to a first blower 17 to discharge air supplied from the first blower 17 through the air openings and to keep the contact ventilation tank in an aerobic state. For example, the aerobic microorganisms degrade the treated water aerobically, while nitrogen-producing bacteria degrade the ammonia nitrogen in nitrate nitrogen in the contact ventilation tank 14 . In general, the term "nitrogen-producing bacteria" refers to ammonium-oxidizing bacteria and nitrite bacteria.

Biomembranes that gradually increase due to abundant growth adhere to the contact element 15 . When air is supplied from the first blower 17 , the first air diffusion tube 16 emits the air through the air openings to separate the biomembranes from the contact element 15 .

The third partition 4 separates the tank 19 for treated water from the contact ventilation tank 14 . A third Advek tion tube 29 is connected to the first pump 18 which is operated on the other hand to supply the sludge water of the treated water, which was built aerobically in the contact ventilation tank 14 , through a connection opening 20 to the tank 19 for treated water. The connection opening 20 runs through an upper part of the third partition 4 .

The sludge water supplied to the treated water tank 19 flows into the disinfection tank 21 . The disinfection tank 21 is provided on the inside with a Sterilisiervor device 22 . The sterilizing device 22 stores a chlorine chemical or the like for disinfecting the treated water that flows into the disinfection tank 19 . The disinfected, treated water is emptied from the tank 1 through an outlet 23 .

A first return pipe 24 is connected to the tank 19 for treated water and the electrolysis bath 37 . A second air diffusion tube 25 arranged in the first return tube 24 is formed with a number of air openings and is connected to a second blower 26 . The second air diffusion tube 25 discharges air that was supplied from the second blower 26 through the air openings. Thus, the first return pipe 24 sucks out a prescribed amount of sludge water from the tank 19 for treated water and transfers it to the electrolysis bath 37 .

The electrodes 41 and 42 are net angeord in the electrolysis bath 37 , while a third air diffusion tube 40 is arranged under the electrodes 41 and 42 . The third air diffusion pipe 40 is formed with a number of air openings and is connected to a fourth blower 39 . Through the third air diffusion tube 40 , the air supplied from the fourth fan 39 through the air openings is blown in to remove membranes such as the biomembranes and membranes in the passive state, which result from nitrate ions or the like from the surfaces of the electrodes 41 and 42 . The electrodes 41 and 42 are preferably provided in the vicinity of the wall surface of the electrolysis bath 37 so that the membranes are more effectively removed by the air blown in from the third air diffusion tube 40 .

The treated water is removed from the electrolysis bath 37 through an outlet 47 into the first tank 5 with an anaerobic filter bed. The outlet 47 of the electrolysis bath 37 is provided with a cover 36 . The lid 36 is connected to egg ner float ball 35 . A level sensor 48 is provided in the vicinity of the cover 36 in order to detect the water level in the first tank 5 with an anaerobic filter bed. The electrodes 41 and 42 , the level sensor 48 and the fourth blower 39 are connected to a power supply unit 38 .

The electrodes 41 and 42 are made of iron or aluminum, for example. The power supply unit 38 applies voltages to the electrodes 41 and 42 , so that one of the electrodes 41 and 42 is positive and the other is negative. If the electrodes 41 and 42 are made of iron, the positive electrode and the negative electrode react as follows:

Positive electrode: Fe → Fe ²⁺ + 2e (1)
Negative electrode: 2H ⁺ + 2e ^- → H ₂ ↑ (2)

Generated in the positive electrode divalent iron ions (Fe ²⁺⁾ are oxidized with air to form trivalent iron ions (Fe ^3+). If the electrodes 41 and 42 are made of aluminum, the reaction of the negative electrode remains unchanged, while the positive electrode reacts electrolytically as follows:

Positive electrode: Al → Al ³⁺ + 3e (3)

While the exemplary embodiment has been described with reference to electrodes 41 and 42 made of iron, aluminum can be replaced for iron in all respects, unless otherwise stated.

The trivalent iron ions (Fe ³ +) formed by the electrolytic reaction according to formula (1) and oxidation are used to coagulate a phosphorus compound which is contained in the treated water which is fed from the first return pipe 24 . The main reaction of the coagulation of the phosphorus compound with Fe ³ + is as follows:

PO ₄ ^3- + Fe ³⁺ → FePO ₄ ↓ (4)

The electrolytic bath 37 is provided at its lower part with a valve 43 to remove any coagulum and sludge from the electrolysis bath 37th When the valve 43 is open, the sludge and the coagulates move from the electrolytic bath 37 into the first tank 5 with an anaerobic filter bed.

Fig. 2 illustrates the structures of the electrolysis bath 37 and the portion around it. With reference to FIG. 2, the aufberei preparing from the first return pipe 24 water flows into an inlet 46 of the electrolysis bath 37th The third air diffusion tube 40 is provided in the vicinity of the electrodes 41 and 42 . The third air diffusion tube 40 supplies air to a portion around the electrodes 41 and 42 .

The cover 36 covering the outlet 47 is connected to the floating ball 35 . The lower end of the lid 36 is connected to the outlet 47 by a hinge 34 , whereby the outlet 47 is covered for opening / closing. When the lid 36 is open, no solution flows into the electrolyte bath 37 through the outlet 4 when the solution in the first tank 5 with an anaerobic filter bed is at a level of 100 A, while the solution flows into the electrolysis bath 37 through the outlet 47 the first tank 5 with an anaerobic filter bed flows when it is at a level of 100 B.

If the solution in the first tank 5 with anaerobic filter bed is at level 100 A, the float ball 35 is in a position 35 A shown in FIG. 2, and therefore the lid 36 is in a position 36 A for opening the Outlet 47 . When the solution in the first tank 5 is at level 100 B with an aerobic filter bed, the float ball 35 in FIG. 2 is in a position 35 B for closing the outlet 47 . According to this exemplary embodiment, the outlet 47 is therefore covered with a cover 36 , which in turn is connected to the float ball 35 , so that the floating sludge mixed with the faecal waste water can be prevented from flowing directly through the inlet 6 into the electrolysis bath 37 . The above-mentioned level 100 A can include such a height that the solution flows from the first tank 5 with an anaerobic filter bed into the electrolysis bath 37 , while floating sludge or the like contained in the solution does not flow into the electrolysis bath 37 .

The electrolysis bath 37 is provided with a control part (not shown) which controls the opening / closing of the valve 34 , the value of a current flowing through the electrodes 41 and 42 , the voltage values of the electrodes 41 and 42 , the amount of the third Air diffusion tube 40 air blown, which can control polarity of the voltages applied to the electrodes 41 and 42 and the like.

The level sensor 48 is provided to detect that the solution in the first tank 5 with an anaerobic filter bed has reached a prescribed height. The level sensor 48 inputs the detected level into the above control part. At the prescribed height, the faecal waste water flowing through the inlet 6 flows, for example, directly into the electrolysis bath 37 . When the level sensor 48 detects that the solution has reached the prescribed height, the control part can emit a warning signal by sound or display. The amount of current flowing through the inlet 6 faecal waste water can be adjusted so that the control part flows due to the above structure genann th no waste water directly into the electrolytic bath 37, whereby it can be reliably prevented from floating sludge flowing in the electrolytic bath 37th The above-mentioned prescribed level can be set so that the solution flows from the first tank 5 with an anaerobic filter bed into the electrolysis bath 37 while no floating sludge or the like contained in the solution flows into the electrolysis bath 37 .

A person waiting for the wastewater treatment system according to this embodiment can determine whether or not the fecal wastewater flowing through the inlet 6 has flowed directly into the electrolysis bath 37 by checking whether or not the above warning has been given. Therefore, if the lid 35 and the float ball 36 are not provided, the person can determine whether or not swimming mud accumulates around the electrodes 41 and 42 by the warning to easily determine whether the electrolytic bath 37 needs to be cleaned or Not.

The controller may control the third air diffusion tube 40 to increase the amount of air supplied therefrom when the level sensor 48 detects that the solution reaches the prescribed level. Even if any floating sludge flows in the part around the electrodes 41 and 42 , the floating sludge can be removed from the electrolysis bath 37 by increasing the amount of air supplied from the third diffusion tube 40 due to the above-mentioned control. Thus, floating sludge can be prevented more reliably from around the electrodes 41 and 42 .

From the above-mentioned embodiment follows that it can be prevented that the floating sludge accumulates around the electrodes 41 and 42 if at least either the arrangement of floating ball 35 and cover 36 or the level sensor 48 is present.

The electrodes 41 and 42 are attached to electrode holding parts 41 A and 42 A, respectively. The electrode holding parts 41 A and 42 A are located on upper sections of the electrodes 41 and 42 and are held by later described holding rods 37 A and 37 B, which are not to be immersed in the treated water that is stored in the electrolysis bath 37 . Fig. 3 shows the structure of the electrodes 41 and 42 as well as the electrode holding parts 41 A and 42 A. Fig. 4 shows the electrodes 41 and 42 and the electrode holding parts 41 A and 42 A, which are combined to one another in the electrolytic bath 37 to be attached.

With reference to FIGS. 3 and 4, the upper portions of the electrodes 41 and 42 are screwed to the electrode holding parts 41 A and 42 A. A spacer 405 is fastened to a surface of the electrode holding part 41 A in such a way that it lies opposite the electrode holding part 42 A. The electrode holding parts 41 A and 42 A are combined and fixed in such a way that they are opposed by the spacer 405 according to FIG. 4. The distance between the electrodes 41 and 42 is adjusted by precisely adjusting the width of the spacer 405 .

The structure of the electrode holding parts 41 A and 42 A will now be described. FIG. 5 is a perspective view of the electrode holding part 41 A. The electrode holding part contains a wire for connecting the electrode 41 to the power supply unit 38 . The connectors 410 and 411 form both ends of the wire. The electrode 41 is screwed to the electrode holding part 41 A so that it is electrically connected to the connecting part 410 . The connector 411 is electrically connected to the power supply unit 38 . This way, both to the electrode holding member 41 A screwed electrode 41 is electrically connected to the power supply unit 38 is connected. The electrode holding part 42 A also has two connecting pieces and contains a wire similar to the electrode holding part 41 A. The screwed to the electrode holding part 42 A electrode 42 is electrically connected to the power supply unit 38 .

May play in the waste water treatment system according to this Ausführungsbei due to the above-mentioned construction of the elec trodes 41 and 42 and the electrode holding parts 41 A and 42 A can be prevented that the 38 connecting wires are the electrodes 41 and 42 to the power supply unit prepared water. Furthermore, it can be prevented that the connecting parts are immersed in the treated water and corroded.

FIG. 6 is a perspective view of the electrolysis base of FIG. 37 . The two support rods 37 A and 37 B are placed on an upper portion of the electrolysis bath 37 at a prescribed distance. Are the left end and the right end of the electrode holding parts 41 A and 42 A is rods at the stops 37 A and 37 B are arranged so that the electrode holding parts 41 A and 42 A in the electrolytic bath 37 is placed. From this state it follows that the electrodes 41 and 42 are held by the holding rods 37 A and 37 B, respectively.

The electrolysis bath 37 can be provided with a single electrode holding part with notch portions to support the electrodes 41 and 42 without misalignment. Fig. 7 shows an electrode holding part 450 with Ausklinkungsabschnit th 451 , which can hold the electrodes 41 and 42 .

The electrode holding part 450 is provided on its front surface and its rear surface with the notch portions 451 capable of engaging the upper portions of the electrodes 41 and 42 , respectively. The upper portions of the electrodes 41 and 42 are respectively engaged and screwed to the notch portions 451 . Thus, the positions of the electrodes 41 and 42 are fixed reliably in the electrolytic bath 37, whereby a distribution of iron ions in the electric lysebad is stabilized 37th It follows that the reaction in the electrolysis bath 37 according to the formula (4) takes place stably. Thus, the treatment possibility of waste water of the waste water treatment device is stabilized according to this embodiment. When the electrode holding member is set to the electrolytic bath 37 450, the lower FLAE come surfaces of the right end 450 A and 450 B of the left end with the support rods 37 A and 37 B in contact. Thus, the elec trodes are 41 and 42 respectively by the support bars 37 A and 37 B being held, when placed in the electrolytic bath 37th

When the electrode holding member 450 and the electrodes 41 and 42 are assembled together for transportation to a unit, they are preferably housed in a housing 460 as shown in FIG . More specifically, the electrodes 41 and 42 assembled into a unit and the electrode holding part 450 are accommodated together in a housing 460 in such a way that the electrodes 41 and 42 are located within the housing 460 . When stored in the housing 460 , the right end 450 A and the left end 450 B of the electric denhalteils 450 are attached to the housing 460 with screws 461 and 462 , respectively.

Second embodiment

There will now be a second embodiment of the present described invention. Each of the wastewater treatment devices according to the second to sixth embodiments game aims to remove a phosphorus compound from the ab to remove water and can be used as a single body or combined bin with a treatment tank, such as an anaerobic Mi tank with an anaerobic filter bed storing microorganisms, be used.

With reference to FIG. 9, activated sludge storage is the activated sludge tank 61 designed to receive waste water from another device through an inlet 69 . At the lower part of the activated sludge tank 61 , a first air diffusion tube 62 is arranged. The first air diffusion tube 62 is connected to a first blower 65 in order to discharge the air supplied from the first blower 65 through air openings. Thus, the activated sludge tank 61 is kept in an aerobic state in order to aerobically degrade wastewater through aerobic microorganisms, while ammonia nitrogen is broken down to nitrate nitrogen by nitriding.

One end of the circulation pipe 63 is inserted into the activated sludge tank 61 . A pump 64 leads from the activated sludge tank 61 through the circulation pipe 63 to an electric lysis bath 70 waste water. The sludge water of the stored in the activated sludge tank 61 waste water is fed through an ad vection tube 77 to a sedimentation tank 67 .

The electrolysis bath 70 comprises electrodes 71 and 72 , which can be made of iron or aluminum. The electric 71 and 72 , which are connected by wires 73 A to a power supply unit 73 , are decomposed by electrolysis to supply 70 iron ions or aluminum ions to the electrolytic bath. In the electrolysis bath 70 to which such metal ions are fed, for example, a phosphorus compound according to the above formula (4) coagulates. A second air diffusion tube 74 is arranged in the electrolytic bath 70 under the electrodes 71 and 72 . The second air diffusion tube 74 is connected to a second blower 66 to discharge the air supplied from the second blower 66 out of air openings into a part around the electrodes 71 and 72 . A valve 75 is provided under the second air diffusion tube 74 . The valve 75 is made open / closable, which is generally closed and conveniently opened to discharge sludge and coagulate late from the electrolysis bath 70 into the activated sludge tank 61 .

The activated sludge tank 61 contains a magnet 61 A. The magnet 61 A receives the coagulate of the phosphorus compound formed in the electrolysis bath 70 . Thus, the sewage treatment device according to this embodiment can remove the phosphorus compound from the sewage more reliably. The magnet 61 A may coagulate the phosphorus compound in an oxidized state. According to this embodiment, the magnet 61 A forms an adsorption medium of a magnetic element.

Similar to the above-mentioned electrodes 41 and 42 , the upper portions of the electrodes 71 and 72 are held by the electrode holding members 71 A and 72 A, which have a similar shape as the electrode holding members 41 A and 42 A.

The electrode holding parts 71 A and 72 A also have pairs of connection parts and each contain the wires 73 A, which are similar to the electrode holding parts 41 A and 42 A.

The electrode holding parts 71 A and 72 A are further formed, similarly to the electrode holding part 450 , with notch sections which can come into engagement with the upper sections of the electrodes 71 and 72 .

According to this exemplary embodiment, the activated sludge tank 61 supplies activated sludge together with treated water to the electrolysis bath 70 . A reaction product according to the above formula (4) coagulates relatively easily from a core of the activated sludge from the activated sludge tank 61 and increases. Therefore, the reaction product according to the above formula (4) is easily sedimented as a coagulum, and therefore an electrolytic reaction of the electrodes 71 and 72 takes place quickly, even if the treatment in the electrolysis bath 70 is carried out for a long period of time. The distance between the electrodes 71 and 72 is preferably at least 2 cm, taking into account the size of the sludge.

The settling tank 67 empties the mud water of the supplied, treated water through an outlet 78 . The sludge 68 collects at the lower part of the sedimentation basin 67 . This sludge 68 is periodically removed from the settling basin 67 .

The waste water treatment device containing the magnet 61 A according to this embodiment can have a high excretion ratio for phosphorus compounds of about 90 to 95% depending on the scope thereof.

Third embodiment

The third exemplary embodiment of FIG described the invention.

Referring to FIG. 10, an activated sludge-storing activated sludge tank 81 receives waste water from another device through an inlet 89 . A first air diffusion tube 82 is arranged on the lower part of the activated sludge tank 81 . The first air diffusion tube 82 is connected to a first blower 85 in order to discharge the air supplied from the first blower 85 through air openings.

One end of a circulation pipe 83 is inserted into the activated sludge tank 81 , so that a pump 84 prepares purified water from the activated sludge tank 81 into an electrolyte bath 90 through the circulation pipe 83 . A advection tube 98, which at its front end portion membranes 97 is arranged in the activated sludge tank 81 to immerse the membranes 97 in the activated sludge tank 81st A pump 87 delivers treated water from the activated sludge tank 81 through the membranes 97 and the advection pipe 98 . The membranes 97 can be formed by flat membranes or hollow fiber membranes of, for example, about 0.05 to 1 μm pore size.

The electrolysis bath 90 contains electrodes 91 and 92 , which can be made of iron or aluminum. The electric to 91 and 92 are closed 93 attached to a power supply unit and are decomposed by electrolysis, reindeer zuzufüh to the electrolytic bath 90 iron ions or aluminum ions. A second air diffusion pipe 94 is in the electrolytic bath 90 below the electrodes 91 and 92 are arranged. The second air diffusion tube 94 is connected to a second blower 86 in order to discharge the air supplied from the second blower 86 from air openings into an area around the electrodes 91 and 92 . A valve 95 is arranged below the second air diffusion tube 94 . The valve 95 is provided for opening / closing, which is normally closed and is expediently opened for emptying sludge and coagulates from the electrolysis bath 90 into the activated sludge tank 1 . Sludge that collects at the lower part of the activated sludge tank 81 is periodically removed.

Similar to the above-mentioned electrodes 41 and 42 , the upper portions of the electrodes 91 and 92 are held by electrode holding members (not shown) which are similar in shape to the electrode holding members 41 A and 42 A.

The membranes 97 are attached to a magnet 97 A. The structure of the membranes 97 and the magnet 97 A will now be described in detail. Fig. 11 is a side view showing one of the diaphragms 97 and the magnets 97A .

With reference to FIGS. 10 and 11, the magnet 97 A has the shape of a pill. The membranes 97 are fixed so that they cover a central hole of the magnet 97 A from the front surface and the rear surface. Fig. 12 is a partial perspective view of the magnet 97 A. The Ma gnet 97 A is provided at its upper portion with an opening which is connected to one end of the advection tube 98 ver. In the waste water treatment apparatus according to the embodiment sem which is guided a portion 97 A sewage reaching membranes in the vicinity of the magnet by the Mem 97 in the Advektionsrohr 98th

According to this embodiment, the magnet 97 A is provided in the vicinity of the membranes 97 in order to take up the coagulate of the phosphorus compound and to prevent it from reaching the membranes 97 , which can prevent the membranes 97 from being clogged.

This exemplary embodiment can be regarded as replacing the sedimentation basin 67 with the membranes 97 in the second exemplary embodiment. Thus, the waste water treatment device can be made more compact.

The wastewater treatment device according to this embodiment, for example, by having the magnet 97 A and filtering wastewater through the membranes 97 , can achieve a high separation ratio for phosphorus compounds of at least 90%.

In the exemplary embodiment mentioned above, the magnet 97 A forms a receiving device for a magnetic element. The membranes 97 form filters to filter the waste water in the live sludge tank 81 . While the magnet 97 A and the membranes 97 are provided in one piece in this embodiment, the present invention is not necessarily limited to this structure. The magnet 97 A and the membranes 97 , which are preferably provided in one piece, must not necessarily be provided in one piece, provided that they are arranged in close proximity to one another.

Fourth embodiment

The fourth exemplary embodiment of FIG described the invention.

Referring to FIG. 13, a diaphragm 107 separates a live sludge tank 101 into an activated sludge storing part and a part that does not store activated sludge. A arranged under the diaphragm 107 From section is not connected to the activated sludge tank 101 , but forms a space that allows movement of water and sludge. The activated sludge tank 101 receives waste water from another device through an inlet 109 . A first air diffusion tube 102 is arranged on the lower part of the activated sludge tank 101 . The first air diffusion tube 102 is connected to a first blower 105 to discharge the air supplied from the first blower 105 through the air openings.

One end of the circulation pipe 103 is inserted into the activated sludge tank 101 . A pump 104 feeds treated water from the activated sludge tank 101 through the circulation pipe 103 to the electrolysis bath 110 . The sludge water of the treated water is emptied from the activated sludge tank 101 through an outlet 118 .

The electrolysis bath 110 contains the electrodes 111 and 112 , which can be made of iron or aluminum. The electrodes 111 and 112 are connected to a power supply unit 113 in order to supply the electrolysis bath 110 with iron ions or aluminum ions by electrolysis. A second air diffusion tube 114 is arranged under the electrodes 111 and 112 in the electrolysis bath 110 . The second air diffusion tube 114 is connected to a second blower 106 to discharge the air supplied from the second blower 106 through air openings into a portion around the electrodes 11 and 112 . A valve 115 is provided under the second air diffusion tube 114 . The valve 115 is arranged to be opened / closed, which is generally closed and is expediently opened in order to discharge sludge and coagulates from the electrolysis bath 110 into the live sludge tank 101 .

A magnet 107 A is arranged on a surface of the diaphragm 107 which does not store activated sludge. The magnet 107 A can collect a coagulate from a phosphorus compound stored in the electrolysis bath 110 .

According to this exemplary embodiment, it follows that the phosphorus compound from the waste water can be collected in a readily regenerable state by causing the magnet 107 A to take up the coagulum of the phosphorus compound. Thus, it can be said that the wastewater treatment device according to this embodiment can contribute to a highly efficient regeneration of phosphorus today if the emission of phosphorus becomes increasingly worse.

The above-mentioned wastewater treatment apparatus according to this embodiment has a structure which is achieved by providing the settling tank 67 in the activated sludge tank 61 of the wastewater treatment apparatus shown in FIG. 9 with the diaphragm 107 .

The waste water treatment device according to this embodiment example can be high depending on its scope Elimination ratio of phosphorus compounds of about Achieve 90 to 95%.

Fifth embodiment

The fifth exemplary embodiment of FIG described the invention.

With reference to FIG. 14, the entire structure of the waste water treatment device according to this embodiment is substantially similar to the structure of the waste water treatment device shown in FIG. 9, and therefore elements common in the waste water treatment device of FIG. 9 become the same Reference numerals denote where a redundant description is not repeated.

In the wastewater treatment device according to this exemplary embodiment, a pump 64 supplies treated water from an activated sludge tank 61 through a circulation pipe 63 to an electrolysis bath 70 . The sludge water of the treated water is led from the electrolysis bath 70 through an outlet pipe 76 into a settling basin 67 . The settling tank 67 empties the sludge water through an outlet 78 from the water treatment device.

A magnet 67 A is attached to the outlet pipe 76 provided in the settling tank 67 . Thus, the magnet 67 A can more effectively absorb a coagulate formed in the electrolysis bath 70 from a phosphorus compound in a state separated from other coagulates and sludge. The wastewater treatment device according to this exemplary embodiment can thus possibly further contribute to an effective regeneration of phosphorus in comparison with the fourth exemplary embodiment.

Sixth embodiment

It will be the sixth embodiment of the present Invention described.

With reference to Fig. 15, the entire structure of the waste water is treatment apparatus according to this embodiment, substantially the structure shown in Fig. Sewage shown 13 treatment apparatus similar and, therefore, elements which the waste water treatment apparatus shown in FIG. 13 are the same, by the same reference numerals referred to, a redundant description is not repeated.

In the wastewater treatment apparatus according to this embodiment, diaphragms 107 and 150 divide an activated sludge tank 101 into an area that stores activated sludge and an area that receives electrodes 111 and 112 , and an area in which sludge 108 is successively separated from an inlet 109 settles.

The waste water supplied from the inlet 109 is stored in the area which stores the sludge in the activated sludge tank 101 , the sludge water being fed from this area into the area receiving the electrodes 111 and 112 .

The treated water and coagulates are supplied from a lower portion of the area receiving the electrodes 111 and 112 to the area in which sludge 108 settles, while the sludge water in this area is emptied from the activated sludge tank 101 through an outlet 118 .

On a wall surface of the diaphragm 150 , closer to the loading area in which the sludge 108 settles, a magnet 150 A is attached. Thus, the magnet 150 A can still effectively take up a coagulate from a phosphorus compound that has formed in the area receiving the electrodes 111 and 112 independently of the remaining coagulates and the sludge.

The treated water discharged from the activated sludge tank 101 is preferably fed to a separately provided tank with an anaerobic filter bed (a tank which stores anaerobic microorganisms).

In the activated sludge tank 101 , a side wall, finally the area in which the sludge 108 settles, is inclined to supply the sludge 108 easily to the area that stores the activated sludge.

Seventh embodiment

A waste water treatment device according to a seventh exemplary embodiment of the present invention can combine manhole covers with electrodes. Fig. 16 shows the waste water treatment apparatus according to this embodiment, which was worked out by modifying the structure of the parts around the manhole covers 28 and the electrodes 41 and 42 in the waste water treatment apparatus shown in Fig. 1. Therefore, elements similar to those of the waste water treatment apparatus shown in Fig. 1 are denoted by like reference numerals, and an unnecessary description will not be repeated.

With reference to Fig. 16, the upper portion of the waste water treatment apparatus is covered with a plurality of manhole covers from 28th The electrodes 41 and 42 are attached to the manhole 28 by insulators 400 . The manner in which electrodes 41 and 42 are attached to insulators 400 will now be described with reference to FIG. 17.

In the waste water treatment apparatus according to this embodiment, the electrodes 41 and 42 are fixed to the manhole covers 28 by the isolators 400 . More specifically, the electrodes 41 and 42 are fixed to the insulators 400 by screwing. The insulators 400 provided with the electrodes 41 and 42 are fastened to the manhole covers 28 by screwing or the like. The electrical 41 and 42 are each connected to a power supply unit 38 by connecting wires 402 . An operator can take the electrodes 41 and 42 out on the floor by using the handles 28 A of the manhole cover 28 and removing them. In other words, the operator can maintain the electrodes 41 and 42 remarkably easily compared to the waste water treatment devices according to the remaining embodiments.

The waste water treatment device according to this embodiment is designed so that the electrodes 41 and 42 are immersed in treated water while the insulators 400 are not immersed in the treated water. Each insulator 400 can receive a connecting wire with connecting parts at both ends thereof, so that these connecting parts are connected to the power supply unit 38 and the electrodes 41 and 42 , respectively. In this case, it can be prevented that connected parts of the electrical 41 and 42 and the power supply unit 38 are immersed in the treated water. In other words, corrosion of the connected parts can be prevented.

If the electrodes 41 and 42 of the sewage treatment device according to this embodiment are attached to the manhole cover 28 , they can be arranged at locations which are higher than those of the electrodes in the remaining embodiments. If they are arranged in high positions, the electrodes 41 and 42 are not immersed in the treated water and are not supplied with iron ions or aluminum ions when voltages are applied. In this exemplary embodiment, however, by monitoring the voltage values of the electrodes 41 and 42 by means of a detection part 38 A, it can be determined whether the electrodes 41 and 42 are immersed in the treated water or not. The wastewater treatment apparatus according to this embodiment preferably comprises means which announce that the electrodes 41 and 42 are not immersed in the treated water when this inadequacy is detected by the voltage values of the electrodes 41 and 42 .

Eighth embodiment

FIGS. 18 and 19 provide a waste water treatment system according to an eighth embodiment of the present invention. Referring to FIG. 18, elements that are identical to the be with respect to the first embodiment, registered wastewater treatment system with those denoted by the same reference numerals, a redundant description is not repeated. With reference to FIG. 19, elements shown in FIG. 18 are partially omitted.

With reference to FIGS. 18 and 19, the Abwasserbehand formed lung system according to this embodiment mainly by a tank 200. A first partition 2 , a second partition 3 , a third partition 4 and a fourth partition 20 divide the tank 200 into a first tank 5 with an anaerobic filter bed, a second tank 10 with an anaerobic filter bed, a contact ventilation tank 14 , a settling tank 19 and one Disinfection tank 21 . In the tank 200 of the water treatment system according to this embodiment, the lower end of the third partition 4 is separated from the lower part of the tank 200 instead of the third advection pipe 29 and the first pump 18 , which are provided on the tank 1 according to FIG. 1. For example, the aerobically treated water in the contact ventilation tank is fed to the settling tank 19 in the tank 200 .

The upper end of a first air diffusion tube 16 is connected to a first blower 17 . The lower end of the most air diffusion tube 16 is provided so that it extends a little inward beyond the outer periphery of the lower surface of the contact ventilation tank 14 , as will be described later (see FIG. 19). Plurality of holes 16 a to the lower surface of the first air diffusion pipe 16 (see Fig. 19) is formed. The holes 16 a release the air supplied from the first fan 17 as bubbles. In comparison with holes, which are formed on the top surface or the side surface, hardly slurry 16 penetrates into the bottom to the surface of the first air diffusion pipe 16 holes formed a a.

The contact ventilation tank 14 has at its lower section from a pump 133 . A sludge return path 134 is connected to the upper part of the pump 133 , while a further sludge return path 135 is connected to the upper end of the sludge return path 134 , which extends to the left in FIG. 18. Thus, the sludge formed in the contact aeration tank 14 is fed into the first tank 5 with an anaerobic filter bed.

In the tank 200 shown in FIG. 18, settling tanks 19 and first tank 5 with an anaerobic filter bed are connected to one another by a first return pipe 24 . In the first return pipe 24 , a second air diffusion pipe 25 is hen vorgese. The second air diffusion tube 25 is connected to a second blower 26 and is formed with injection openings for blowing in air.

The second air diffusion tube 25 blows the air supplied from the second blower 26 through the injection openings in order to supply treated water from the settling tank 19 into the first tank 5 with an anaerobic filter bed through the first return tube 24 .

An electrolytic unit with a housing 54 is provided on an upper part of the contact ventilation tank 14 . More specifically, the housing 54 is a hollow body that is connected to four vertical plate elements. Electrode pairs 51 and 52 are provided in the housing 54 . The electric denpaare 51 and 52 are each connected to a power source 57 . A third air diffusion tube 53 is provided in the housing 54 . The third air diffusion tube 53 is connected to a fourth blower 56 .

In the housing 54 , metal ions such as iron ions or aluminum ions are released by an electrolytic reaction in the electrode pairs 51 and 52 . Thus, the metal ions dissolved out react with a phosphorus compound which is contained in the treated water in order to form and coagulate metal salts which are readily soluble in water in the contact ventilation tank 14 . For example, the metal ions react with the phosphorus compound represented by the above formula (4).

With reference to FIGS. 20 and 21, the structure of Elek trodenpaars is described in detail 51st Fig. 20 is a perspective view of the electrode pair 51st Fig. 21 is a partially broken away perspective view of the electrode pair 51st

The pair of electrodes 51 contains two metal plates forming the electrodes 711 and 712 . The metal plates are made of iron or aluminum, for example. The pair of electrodes 51 further includes a holder 710 . A handle 710 A is attached to an upper section of the holder 710 . A cover 713 is attached to the left side surface of the bracket 710 . More specifically, the cover 613 is formed with six screw holes that receive prescribed screws to secure the cover 713 to the left side surface of the bracket 710 . The electrode 711 is provided on the cover 713 with the screw nuts 711 A and 711 B. The above screw holes include screw holes 713 A, 713 B (see Fig. 22), 713C, 713D and 713E. The above-mentioned prescribed screws include the screws 717 A, 717 B, 717 C and 717 D shown in FIG. 22.

A guide 719 D is attached to an upper rear part of the bracket 710 , and a wire 719 protrudes upward from the guide 719 D along the bracket 710 . The wire 719 passes through the guide 719 D, which has a cylindrical shape. The connector 719 C is connected to one end of the wire 719 .

Part of the wire 719 located under the guide 719 D is accommodated in a combination of the holder 710 and cover 713 . The wire 719 contains a plurality of wires (including a wire 719 A described later). At the other end of the wire 719 , connections such as the connector 718 (see FIG. 22) are attached to the corresponding one of the several wires.

FIGS. 22 and 23 are partial perspective views showing in exploded pair of electrodes 51st With reference to Fig. 23, the wire 719 , the connector 719 C, the wire 719 A and the circuit 718 are omitted for easy illustration.

With reference to FIGS. 22 and 23 are the Elektrodenbefe stigungen 715 and 716 made of iron or stainless steel Zvi the cover 713 and the bracket 710's provided. The electrode fasteners 715 and 716 are preferably made of a conductive, corrosion-resistant material.

The electrode attachment 715 is a plate formed with projections 715 A and 715 B. Holes formed in the cover 713 can pass through the projections 715 A and 715 B. The electrode 711 is fixed so that it is electrically connected to the protrusions 715 A and 715 B through the screw nuts 711 A and 711 B.

The connector 718 is provided somewhat at the rear of the central portion of the bracket 710 between the electrode attachments 715 and 716 . Terminal 718 forms the end of wire 719 A. Wire 719 A is one of several wires contained in wire 719 .

The connector 718 is positioned to come into contact with the protrusion 715 A when the electrode mount 715 is attached to the cover 713 , where the cover 713 is attached to the bracket 710 . Thus, the electrode 711 is electrically connected to the terminal 718 through the projection 715 A.

The electrode attachment 716 is also formed with protrusions that are similar to the protrusions 715 A and 715 B. The protrusions protrude on the left side surface of the bracket 710 . A connector that is different from the circuit 718 is hen hen in front of the middle part of the bracket 710 between the electrode brackets 715 and 716 . This connector forms one end of the other wire, different from wire 719 A, in the plurality of wires contained in wire 719 . This wire is electrically connected to the projections formed on the electrode attachment 716 , the projections being connected to the electrode 712 . This connection is electrically connected to the electrode 712 .

An insulator (not shown) is provided between the electrode attachments 715 and 716 and between the connector and connector 718 . Thus, it can be reliably prevented that the electrodes 711 and 712 in the combination of the holder 710 and the cover 713 are short-circuited to each other.

The screws 714 A, 714 B and 714 C clamp the electrode fastening 715 to the cover 713 . The screws 714 D, 714 E and 714 F clamp the electrode attachment to the holder 710 .

A seal 710 B is provided between the holder 710 and the cover 713 outside of the section to which the cover 713 is screwed. A further seal 710 C is provided between bracket 710 and mounting electrodes 716 outside of the portion to which the trodenbefestigung Elek is screwed 716th Furthermore, between the cover 713 and the electrode attachment 715 outside the section to which the electrode attachment 715 is screwed, a seal is provided which is similar to the seal 710 C.

When the bracket 710 and the cover 713 are combined, they can receive the connector 718 , where no water will penetrate into the connector mentioned above.

Ninth embodiment

The Fig. 24A is a sectional left side view showing an electrode 260 and elements to the elec trode 260 around in an electrolytic unit accordingly to a ninth embodiment of the present invention are disposed, and Fig. 24B, these elements plan view showing is.

The upper end of the electrode 260 is attached to a bracket 261 . A pressure device 263 for pressing a portion around the upper end of the electrode 260 is provided in the holder 261 . The connections 267 and 268 are built into the printing device 263 .

A handle 268 is attached to the upper portion of the bracket 261 . One end of wire 278 is connected to a prescribed power source. The wire 278 is installed in the handle 262 , the bracket 261 and the pressure device 263 . The other end of wire 278 is connected to terminal 267 . The electrode 260 is electrically connected to the connection 267 in the holder 261 , so that it is electrically connected to the prescribed current source.

Between the bracket 261 and the electrode 260 , a seal 264 is provided which comes in contact with the lower end of the pressure device 263 . The seal 264 covers the outer circumference of the electrode 260 . This prevents wastewater from entering an intermediate space in which the connections 267 and 268 are received in the holder 261 .

An air diffusion tube 271 is provided to cover the left side surface, the lower surface and the right side surface of the electrode 260 . The air diffusion tube 271 has a U-shaped end and an upper left end that is connected to a pump 256 . At the upper right th end of the air diffusion tube 271 , a lid 277 is placed on.

Several holes 271 A are formed in the lower surface of the air diffusion tube 271 . When feeding air from the fourth fan (pump) 256, the air diffusion pipe is therefore bubbles through the holes 271 A free. When current is applied to the electrode 260 to electrically decompose the electrode 260 or other electrode, the bubbles remove a thin layer formed on the surface of the electrode 260 . The air diffusion tube 271 is also attached to the bracket 261 .

The fastening parts 272 to 276 for fastening the elec trode 260 to the air diffusion tube 271 are fastened to it.

Fig. 25 typically illustrates the electrolytic unit according to this embodiment. With reference to Fig. 25, the air diffusion tube 271 by a Rohrverbin extension part 361 and an air supply pipe 360 to the fourth fan 256 is coupled. According to this embodiment, the air diffusion tube 271 can be detached from the fourth blower 256 by rotating the tube connecting part 361 .

In the electrolytic unit according to this embodiment, the air diffusion tube 271 , which can be removed from the fourth blower (pump) 256, can be sufficiently flushed. This can prevent the holes 271 A from being prevented from delivering enough bubbles due to the sludge clogging the holes 271 A. Therefore, according to this embodiment, there is no concern that the holes 271 A hindered ver stopfender sludge removal of the thin layer from the surface of the electrode 260th

The electrode 260 is immersed in the waste water W stored in an electrolysis bath 270 . The electrolysis bath 270 is provided with a mechanism (not shown) to apply deposits resulting from the electrolysis of the electrode 260 or the like from the electrolysis bath 270 .

The electrolysis bath 270 is also provided with attachments 270 A and 270 B in order to clamp the holder 261 to the electrolysis bath 270 . According to the present invention, the air diffusion tube 271 may not necessarily be attached to the bracket 261 in that it is detachable from the pump 256 (ie, detachably attached).

The method of attaching the electrode 260 to the bracket 261 will now be described with reference to FIG. 26. Fig. 26 partially illustrates the left side surfaces of the respective elements shown in Figs. 24A and 24B. The electrode 260 is inserted into the bracket 261 and the air diffusion tube 271 from the rear so that it is fixed in a position shown by a chain line P with a dash. The electrode 260 is fixed to the bracket 261 with a prescribed screw or the like. The electrode 260 and the bracket 261 are provided with holes 260 A and 261 A to receive the respective screw.

In the above embodiment, the bracket 261 holds the single electrode 260 . In general, the electrolytic reaction takes place between the two electrodes. For example, the single bracket 261 may hold two electrodes. FIG. 27A and 27B illustrate electrodes 260 and 360 as well as components that are disposed around the electrodes 260 and 360 around in an electrolytic unit having a holder 261, to hold two electrodes according to a modification of this embodiment. Fig. 27A is a left side view, and Fig. 27B is a plan view showing these elements.

The electrodes 260 and 360 are attached to the bracket 261 . A pressure device 363 is provided in the bracket 261 to press a portion around the top of the electrode 360 together with the components shown in FIGS . 24A and 24B. In the Druckvorrich device 363 ports (including the port 368 ) are built in, which correspond to the ports 267 and 268 . The terminals electrically connect the electrode 360 to a wire 378 . At an upper portion of the holding tion 261 , a handle 262 is attached. The sizes of the bracket 261 and the handle 262 are about twice that shown in Figs. 24A and 24B along the depth direction.

In intermediate sections of the bracket 261 and the handle 262 , an insulator 300 is inserted along the depth direction. This can prevent the terminals 267 and 268 from being electrically connected to the terminals connected to the electrode 360 . One end of the wire 378 is connected to a prescribed power source. The insulator 300 is clamped by a screw 311 inserted in the handle 262 .

A seal 364 (which corresponds to the seal 264 ) is provided which comes into contact with the lower end of the pressure device 363 . The seal 364 partially covers the outer periphery of the electrode 360 . In this way, waste water can be prevented from penetrating into an intermediate space in which the connections which are connected to the electrode 360 in the holder 261 are accommodated.

To cover the left side surface, the lower surface and the right side surface of the electrode 360 , an air diffusion tube 371 is provided. The air diffusion tube 371 is connected to the pump 256 . The air diffusion tube 371 is also formed on its lower surface with numerous holes and is removable from the pump 256 , similar to the air diffusion tube 271 . Furthermore, components (including fastenings 372 to 374 ) for clamping the electrode 360 are attached to the air diffusion tube 371 in the same manner as the components for clamping the electrode 260 are attached to the air diffusion tube 271 .

The electrolytic unit according to this exemplary embodiment, including the electrolysis bath 270, can be immersed in the first tank 5 with an anaerobic filter bed, in the second tank 10 with an anaerobic filter bed, the contact ventilation tank 14 or in the settling tank 19 in the tank shown in FIGS. 1 or 18 to feed metal ions into the wastewater stored in each tank.

Although the present invention has been described in detail and illustrated, it becomes clear that this is a way of illustration and just an example and is not to be understood as a limitation, mind and scope of the present invention only by Be handles of the appended claims are limited.

Claims (10)

1. An underground wastewater treatment device ( 1 ) for treating wastewater, comprising:
a manhole for inspection of the wastewater treatment device;
a waste water treatment part ( 5 ) storing waste water; and
an ion supply part ( 37 ) which supplies the wastewater treatment part ( 5 ) with iron ions or aluminum ions, the ion supply part ( 37 ) containing an electrode ( 41 , 42 ) being fastened to the manhole cover. 2. Waste water treatment device ( 1 ) according to claim 1, further comprising: detection means ( 38 A) which can detect whether the electrode ( 41 , 42 ) is immersed in the waste water or not. 3. Waste water treatment device with an electrode ( 711 ) for supplying current from a prescribed power source to the electrode ( 711 ) in order to electrolytically decompose the electrode, the waste water treatment device further comprising:
an electrode holding member ( 710 , 713 ) holding the electrode ( 711 );
a wire ( 719 ) for connecting the electrode ( 711 ) to the prescribed power source;
a terminal ( 718 ) provided at one end of the wire ( 719 ) closer to the electrode; and
a connecting element ( 715 ) which is fastened to the electrode holding part and which can be removed from the electrode holding part in order to electrically connect the connection to the electrode, wherein
the connector ( 718 ) in the electrode holding part ( 710 , 713 ) is installed so that it does not come into contact with a part outside of the electrode holding part ( 710 , 713 ). 4. Waste water treatment apparatus according to claim 3, in which the electrode holding part ( 710 , 713 ) receives at least part of the wire ( 719 ). 5. Waste water treatment device according to claims 3 or 4, in which the electrode holding part ( 261 , 262 ) can accommodate a plurality of electrodes ( 260 , 360 ), and an insulator ( 300 ) ent, which is between an electrode and another electrode among the many Electrodes is arranged. 6. A waste water treatment device having an electrode ( 260 ) for electrolytically decomposing the electrode, the waste water treatment device further comprising a pipe ( 271 ) formed with a hole ( 271 A) and detachably connected to a prescribed pump to blow through the hole to spread a part around the electrode. The waste water treatment apparatus according to claim 6, further comprising: an electrode holding part ( 261 , 262 ) holding the electrode ( 260 ) and the tube ( 271 ). 8. Wastewater treatment device according to claims 6 or 7, in which
the electrode ( 260 ) is supplied with current from a prescribed current source in order to be electrolytically decomposed,
the wastewater treatment device further comprising:
a wire ( 278 ) connecting the prescribed power source and the electrode ( 260 ) to each other, and
an electrode holding part ( 261 , 262 ) which holds the electrode, and
the electrode holding part receives at least part of the wire. 9. Waste water treatment device according to one of claims 1 to 8, further comprising:
an anaerobic tank ( 5 , 10 ) which absorbs waste water and has anaerobic microorganisms located therein,
an aerobic tank ( 14 ) which receives waste water and has aerobic microorganisms therein, and
a settling basin ( 19 ) which receives sewage for settling sludge, wherein
the electrode ( 260 ) is immersed in the waste water in the anaerobic tank, in the aerobic tank or in the settling tank. 10. Waste water treatment device according to one of claims 1 to 8, further comprising:
an electrolysis bath ( 270 ), which only receives waste water for the electrolytic decomposition of the electrode ( 260 ), wherein
the electrode is immersed in the waste water in the electrolysis bath.