JP2006218477A - Washing method of wastewater treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate washing work by effectively using treated water obtained by treating wastewater by a treatment tank. <P>SOLUTION: This washing method is for the wastewater treatment apparatus having a treatment tank 1 provided with treatment chambers 4-8 treating stepwise wastewater containing sludge components like sanitary sewage discharged from toilets, and a treated water storage tank 2 separately formed from the treatment tank 1 and storing the treated water drawn out of the treatment tank 1. After drawing out wastewater contained in the treatment chambers 4-8 and treated water, the treated water stored in the treated water storage tank 2 is supplied as washing water from the upper part of the most upstream treatment chamber 4 in the treatment tank 1. Thus, sludge components attached to the inner wall of the most upstream treatment chamber 4 are removed, and the treated water is charged to the most upstream treatment chamber 4 and the downstream treatment chambers thereof. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for cleaning a wastewater purification apparatus for quickly and highly purifying wastewater composed of manure water or the like discharged from a toilet.

Conventionally, as shown in, for example, Patent Document 1, a first aeration chamber for aeration treatment of sewage using an oyster shell as a contact material, and an overflow of the first aeration chamber are brought into contact with a porous artificial dredging material. Purified in the anaerobic filter chamber that performs anaerobic decomposition treatment, the second anaerobic chamber that flows in the sewage purified in the anaerobic filter chamber and uses the oyster shell as a contact material, and the second anaerobic chamber The finishing process chamber performs advanced decolorization and deodorization treatment by injecting the collected water into contact with the activated carbon. A pre-treatment chamber for wastewater flowing into the first aeration chamber is provided with a contact aeration chamber to be aired and a sedimentation chamber for storing sewage treated with contact aeration in the contact aeration chamber and sending it to the first aeration chamber Advanced treatment septic tanks are known.
Japanese Patent No. 2756657

  As shown in Patent Document 1, waste water purification comprising an advanced treatment septic tank provided with a precipitation separation chamber, a contact aeration chamber, a first aeration chamber, an anaerobic filter floor chamber, a second aeration chamber and a finishing chamber According to the apparatus, this waste water can be purified quickly and highly by treating the waste water composed of sewage discharged from the toilet in stages. However, when regularly checking the waste water purification device or when transferring a waste water purification device temporarily installed at an event, etc., each purification treatment chamber consisting of the precipitation separation chamber and the contact aeration chamber etc. After draining the waste water sequentially, it is necessary to wash each individually, so that the work is extremely complicated and the time required for the washing work is unavoidable, and the above-mentioned purified water is effectively used. There was a problem that was difficult.

  The present invention has been made in view of the above points, and facilitates the cleaning operation of the purified water storage tank by effectively using the purified water obtained by purifying the wastewater by the purification treatment tank. It aims at providing the washing | cleaning method of the waste water purification apparatus which has the advantage of being able to do.

  The invention according to claim 1 is separate from the purification treatment tank provided with a plurality of purification treatment chambers for purifying wastewater containing sludge components such as sewage discharged from the toilet in stages. A wastewater purification apparatus cleaning method comprising a purified water storage tank that is formed and stores purified water derived from a purification treatment tank, wherein the waste water and the treated water are contained in the plurality of purification treatment chambers. After performing the derivation work, the purified water stored in the purified water storage tank is supplied as washing water from the uppermost part of the uppermost stream purification treatment chamber located at the uppermost stream part of the purification treatment tank. In addition to removing sludge components and the like adhering to the inner wall surface of the purification treatment chamber, the uppermost purification treatment chamber and the purification treatment chamber downstream thereof are filled with cleaning water composed of the purified water.

  The present invention stores the purified water obtained by purifying the wastewater by the purification treatment tank in the purified water storage tank, and the wastewater accommodated in the plurality of purification treatment chambers constituting the purified water storage tank. And the treated water derivation operation, the purified water stored in the purified water storage tank is supplied as washing water from the uppermost upstream purification chamber located at the uppermost stream of the purified treatment tank. In addition to removing sludge components and the like adhering to the inner wall surface of the upstream purification treatment chamber, the cleaning water composed of the purified water is filled in the most upstream purification treatment chamber and the purification treatment chamber downstream thereof, Thereby, there exists an advantage that the washing | cleaning operation | work of the said purified water storage tank can be made easy.

  FIG. 1 and FIG. 2 show a specific configuration of the waste water purification device, which includes a steel plate material, an aluminum alloy material, a stainless steel material, a plastic material, a PC (prestressed concrete) material, a reinforced concrete material, and an FRP (fiber). A purification treatment tank 1 made of a reinforced plastic material or a plastic material, and a purification water storage tank 2 for storing the purified water derived from the purification treatment tank 1, and the purification treatment tank 1 and the purification water storage tank 2 Is used in a state where it is buried in the ground or standing on the ground.

  The purification treatment tank 1 includes an uppermost purification treatment chamber 4 comprising a sedimentation separation chamber located at the most upstream part, a first intermediate flow purification treatment chamber 5 comprising a contact aeration treatment chamber located downstream thereof, and a downstream thereof. The second middle-stream purification treatment chamber 6 composed of a sedimentation chamber on the side, the third middle-stream purification treatment chamber 7 composed of a contact filtration chamber on the downstream side thereof, and the precipitation filtration chamber located in the most downstream portion of each purification treatment chamber 4-8 And a purified water storage chamber 9 for storing the processed water derived from the most downstream purification processing chamber 8 by decolorizing and storing the processed water.

  The uppermost stream purification treatment chamber (sediment separation chamber) 4 includes sludge components such as sewage discharged from a toilet (not shown) through a discharge pipe 3 or miscellaneous wastewater generated by finely pulverizing raw garbage with a disposer. The waste water containing paper and sludge components such as coarse foreign matters are precipitated and separated, and the treated water after separation is discharged into the first middle flow purification treatment chamber 5 and discharged. The baffle plate 10 prevents the suspended matter from flowing into the processing chamber 5. The solid content precipitated in the most upstream purification processing chamber 4 is sucked out and processed periodically (for example, every year).

  The first intermediate flow purification treatment chamber 5 (contact aeration chamber) is filled with a conventionally known plastic contact material 11, and an air diffuser 12 for discharging air supplied from a blower (not shown) is made of the plastic. It is disposed below the contact material 11. Then, the treated water introduced into the first middle flow purification treatment chamber 5 by overflowing from the upper part of the uppermost flow purification treatment chamber 4 is agitated by the air discharged from the air diffuser 12 and the plastic contact material. 11, the sludge components in the separated water are decomposed by microorganisms that have inhabited and inhabited.

  In addition, a communication path 13 is provided at the lower end portion between the first middle flow purification treatment chamber 5 and the second middle flow purification treatment chamber 6, and treated water purified in the first middle flow purification treatment chamber 5 By being introduced into the second intermediate flow purification treatment chamber 6 (precipitation chamber) through the communication path 13, the precipitation treatment is performed. The treated water precipitated in the second middle-stream purification treatment chamber 6 is introduced by overflowing into the third middle-stream purification treatment chamber 7 through the outlet pipe 14.

  In the third middle-stream purification treatment chamber (contact filtration chamber) 7, oysters, scallops, sea bream, pearl oysters, clams, clams, clams, blue goats, crows, tuna, mill shells or A shell made of shell fossils or the like, or a shell / smoked contact material 15 containing dead and whitened cocoons are filled, and an air diffuser 16 for releasing the air supplied from the blower is disposed below the shell and smoked contact material 15. Has been.

  As shown in FIG. 3, the shell includes calcium carbonate as a main component and contains trace components such as calcium phosphate and magnesium carbonate, and includes an outer shell layer a, an inner pearl layer b, And a prismatic layer c. And as shown in FIG. 4, the said contact material 15 is comprised by accommodating in the bag body in the state from which the pearl layer b of the said shell was removed.

  As a method of removing the nacreous layer b of the shell, a method of peeling the nacreous layer b using an appropriate tool, a method of allowing the shell to leave the seashell for about a year at the beach shore, and eroding the nacreous layer b naturally, hydrochloric acid There are a method of dissolving the nacreous layer b using a chemical such as a method, a method of peeling a nacreous layer b by agitating a large number of shells with a stirrer and bringing the shells into contact with each other. When the nacreous layer b is removed by the natural erosion or stirring method, a part of the shell layer a is also removed together with the nacreous layer b.

  The treated water introduced from the second middle flow purification treatment chamber 6 into the third middle flow purification treatment chamber 7 adheres to the shell / smoked contact material 15 while being agitated by the air released from the air diffuser 16. The sludge components in the treated water are decomposed by the microorganisms that inhabit the state. Further, the treated water introduced by overflowing from the lower end of the second middle flow purification treatment chamber 6 into the third middle flow purification treatment chamber 7 is agitated by the air discharged from the air diffuser 16, and the shell / The sludge components in the treated water are further decomposed by microorganisms that live in a state of adhering to the smoked contact material 15.

  The treated water purified in the third middle flow purification treatment chamber 7 is led out to the most downstream purification treatment chamber 8 from its lower end. The most downstream purification treatment chamber (precipitation filtration chamber) 8 has a filter body 17 containing a porous zeolite, and precipitates impurities in the treated water led out from the third intermediate flow purification treatment chamber 7. Thus, the water is separated into sewage and supernatant water, and fine impurities in the supernatant water are filtered by the filter body 17 to generate purified water. The purified water generated in the most downstream purification treatment chamber 8 overflows into the purified water storage chamber 9 and is led out.

  Further, in the purified water storage chamber 9, as shown in FIG. 5, as shown in FIG. 5, an adsorption cylinder 21 in which a plurality of through holes 19 and 20 are vertically installed, and a partition plate in the adsorption cylinder 21. Circulating means having an activated carbon container 22 disposed between 19 and 20 and a circulation pump 23 and a circulation pipe 24 for sucking the treated water in the purified water storage chamber 9 and discharging it to the lower part of the activated carbon container 22. 25. The activated carbon container 22 is configured by filling a bag made of a cloth material or the like with coal-based activated carbon. The treated water discharged to the lower part of the activated carbon container 22 by the circulation means 25 circulates in the purified water storage chamber 9 through the adsorption cylinder 21, and at that time, in the activated carbon container 22 The pigment component is adsorbed by the coal-based activated carbon and effectively decolorized.

  As shown in FIG. 2, a part of the purified water decolorized in the purified water storage chamber 9 is supplied to a toilet water tank (not shown) by a water supply means 28 having a water supply pump 26 and a water supply pipe 27. In addition, the remainder is led out and stored in the purified water storage tank 2 via the lead-out pipe 30. The capacity of the purified water storage tank 2 is set to a value substantially equal to the total capacity of the most upstream purification process chamber 4 and the first and second intermediate flow purification process chambers 5 and 6.

  Further, the purified water in the purified water storage chamber 9 is supplied to the water supply pipe 27 as needed from the upper portions of the first and third intermediate flow purification treatment chambers 5 and 7 and the most downstream purification treatment chamber 8. Cleaning pipes 31 to 33 for cleaning the inner wall surfaces of the respective purification processing chambers 5 to 8 are connected in series by supplying the chambers 5 to 8 as cleaning water.

  As shown in FIG. 2 and FIG. 6, the most upstream purification treatment chamber 4, the first and third middle-stream purification treatment chambers 5 and 7 and the most downstream purification treatment chamber 8 located on the downstream side thereof are purified. The tanks 1 are connected to each other via a reflux passage 35 installed at the lower side of the tank 1. The recirculation passage 35 is provided with first and second on-off valves 36 and 37 for opening and closing the recirculation passage 35, and the first on-off valve 36 located upstream of the recirculation passage 35 is opened. The uppermost stream purification treatment chamber 4, the first middle flow purification treatment chamber 5, and the second middle flow purification treatment chamber 6 are configured to communicate with each other. Further, by maintaining the first on-off valve 36 in the open state and opening the second on-off valve 37 on the downstream side thereof, the most upstream purification processing chamber 4, the third intermediate flow purification processing chamber 7, The most downstream purification treatment chamber 8 is configured to be in a communication state.

  Openings 40 to 43 for cleaning or inspection are provided above the uppermost purification process chamber 4, the first to third intermediate flow purification process chambers 5 to 7, the most downstream purification process chamber 8, and the purified water storage chamber 9, respectively. Is formed. The opening 40 formed in the uppermost stream purification treatment chamber 4 is used as a suction port into which a suction hose of the drainage suction means is inserted. Further, at the normal time, a closing lid (not shown) for closing the openings 40 to 43 so as to be openable and closable is installed. Further, the waste water purification apparatus supplies the purified water stored in the purified water storage tank 2 as cleaning water into the most upstream purification treatment chamber 4 to wash the inner wall surface of the most upstream purification treatment chamber 4. Purified water supply means 47 having a water supply pump 45 and a water supply pipe 46 is provided.

  In the above-described configuration, wastewater or the like introduced into the uppermost stream purification treatment chamber (precipitation separation chamber) 4 through the discharge pipe 3 from the toilet not shown in the figure is not limited to paper, coarse foreign matters, etc. in the uppermost stream purification treatment chamber 4. After the sludge component is precipitated and separated, it is introduced into the first middle flow treatment chamber (contact aeration chamber) 5. The treated water introduced into the first middle-stream treatment chamber 5 is decomposed by microorganisms and the sludge components are introduced into the second middle-stream treatment chamber (sedimentation chamber) and subjected to precipitation treatment, and then the third It is introduced and stored in the purified water storage chamber 9 via the middle-stream purification treatment chamber (contact filtration chamber) 7 and the most downstream purification treatment chamber (precipitation filtration chamber) 8, and is further led out and stored in the purified water storage tank 2. The

  And for events such as outdoor concerts or when disasters occur, when removing the waste water purification equipment temporarily installed at a predetermined location, or for public toilets installed regularly in parks, etc. When regularly checking or repairing the waste water purification device, the suction hose of the waste water suction means provided in the vacuum car or the like is inserted into the opening 40 of the most upstream purification treatment chamber 4 to drain the internal waste water. Suction and lead out. Further, with the first and second on-off valves (opening / closing means) 36 and 37 provided in the reflux passage 35 being opened sequentially, the treated water introduced into the most upstream purification treatment chamber 4 is sucked to the outside. By continuing the work to be led out, the treated water recirculated from the first to third middle flow purification treatment chambers 5 to 7 and the most downstream purification treatment chamber 8 into the most upstream purification treatment chamber 4 through the return passage 35. In addition to removing the sludge components and the like adhering to the inner wall surface of the uppermost stream purification treatment chamber 4 with the washing water supplied from the purified water supply means 47, the uppermost purification treatment chamber 4 and the first The second intermediate flow purification treatment chambers 5 and 6 are filled with the washing water made of the purification water, and the inner wall surfaces of the purification treatment chambers 4 to 6 are washed using the washing water.

  In this way, the suction hoses are sequentially inserted into the openings 40 to 43 formed at the upper end portions of the respective purification treatment chambers 4 to 8, and the internal waste water or the treated water is individually led out to the outside. The waste water purification device installed at the time of events such as outdoor concerts or when disasters occur, etc., with the interior of each of the purification treatment chambers 4 to 8 being emptied quickly and easily without requiring a tedious work It is possible to easily and appropriately perform the work of removing, the work of regularly inspecting and repairing the drainage purification apparatus for public toilets regularly installed in a park or the like.

  The waste water purification apparatus configured as described above includes a plurality of purification treatment chambers 4 to 8 that purify the waste water discharged from the toilet in stages, and a purified water storage chamber 9 that stores the purified water that has been purified. A purification treatment tank 1 and a purification water storage tank 2 that is formed separately from the purification treatment tank 1 and stores purified water derived from the purification water storage chamber 9 of the purification water treatment tank 1 are provided. Therefore, the paper and the sludge components such as coarse foreign matters led out from the toilet through the discharge pipe 3 are separated from the first upstream purification processing chamber 4 after the precipitation separation chamber in the uppermost upstream purification processing chamber 4. 3 In a state where the sludge components in the treated water sequentially led to the middle-stream purification treatment chambers 5 to 7 and the most downstream purification treatment chamber 8 are purified stepwise by the action of microorganisms, the purified water is supplied to the purified water storage chamber 9 and Derived and stored in the purified water storage tank 2 for water supply By such supply to the water supply tank toilet by the step 28, it is possible to effectively use.

  And the capacity | capacitance of the said purified water storage tank 2 is made into the 1st middle flow purification process chamber 5 which consists of the uppermost stream purification process chamber 4 which consists of a sedimentation separation chamber located in the most upstream part, and the contact aeration process tank located in the downstream. In addition, since the total capacity of the second middle-stream purification treatment chamber 6 composed of the sedimentation chamber on the downstream side is set to a value approximately equal to the total capacity, each purification treatment is performed when the drainage purification apparatus is regularly inspected and repaired as described above. After the waste water and the treated water accommodated in the chambers 4 to 8 are sequentially led out to the outside, the purified water in the purified water storage tank 2 is supplied to the most upstream purification treatment chamber 4 and the first and second intermediate flow purification treatment chambers 5, 5. There is an advantage that the inside of 6 can be properly cleaned by filling with purified water.

  In particular, in the above-described embodiment, the most upstream purification treatment chamber 4 located at the most upstream portion of the waste water purification apparatus is provided with an opening (suction port) 40 for sucking waste water, and the most upstream purification treatment chamber 4. A reflux means having a reflux passage 35 for refluxing treated water in the first to third intermediate flow purification treatment chambers 5 to 7 and the most downstream purification treatment chamber 8 disposed on the downstream side of the uppermost flow purification treatment chamber; Since the purified water supply means 47 for supplying the purified water stored in the purified water storage tank 2 to the uppermost stream purification treatment chamber 4 is provided, the suction hose of the drainage suction means provided in the vacuum car or the like is connected to the uppermost stream. The inner wall surface can be cleaned by inserting it into the opening 40 of the purification treatment chamber 4 and sucking the waste water inside.

  That is, after the waste water accommodated in the most upstream purification processing chamber 4 is led out to the outside by the waste water suction means, the first and second on-off valves (open / close means) 36 and 37 provided in the reflux passage 35 are sequentially provided. In the opened state, the first to third middle-stream purification treatment chambers 5 to 7 and the most downstream purification treatment are carried out by continuing the work of sucking the treated water introduced into the most upstream purification treatment chamber 4 and leading it to the outside. The treated water refluxed from the chamber 8 through the reflux passage 35 into the most upstream purification treatment chamber 4 can be sequentially led out. And while removing the sludge component etc. which adhered to the inner wall surface of the most upstream purification process chamber 4 with the wash water supplied from the said purified water supply means 47, the most upstream purification process chamber 4 and the 1st, 2nd middle flow purification process. The chambers 5 and 6 can be filled with cleaning water composed of the purified water. Therefore, complicated work such as inserting the suction hoses into the openings 40 to 43 formed at the upper ends of the respective purification treatment chambers 4 to 8 in order and individually leading the internal drainage or treated water to the outside. Therefore, the inside of each of the purification treatment chambers 4 to 8 can be emptied quickly and easily.

  Further, in the above embodiment, the purified water stored in the purified water storage chamber 9 of the purification treatment tank 1 is washed from the upper portions of the first and third intermediate flow purification treatment chambers 5 and 7 and the most downstream purification treatment chamber 8. As the purified water supply means comprising the water supply means 28 provided with the cleaning pipes 31 to 33 respectively supplied as above, the treated water in the first to third intermediate flow purification treatment chambers 5 to 7 and the most downstream purification treatment chamber 8 is provided. Is returned to the uppermost purification process chamber 4 and sequentially led out to the outside, and the sludge components adhering to the inner wall surfaces of the respective purification process chambers 5 to 8 are washed water supplied from the purified water supply means. There is an advantage that it can be effectively removed.

  Furthermore, in the above embodiment, as the shell / shell contact material 15 filled in the third middle-stream purification treatment chamber 7 of the waste water purification apparatus, at least the inner pearl layer b is removed and the porous prismatic layer c is exposed. Since the oyster shells and the like were used, the affinity between the shell / shell contact material 15 and the microorganisms for decomposing the sludge components in the treated water introduced into the third middle flow purification treatment chamber 7 is increased. It can be suitably propagated. Therefore, the microorganisms propagated in the porous prismatic layer c can effectively decompose the sludge components in the treated water and efficiently purify the waste water. In addition, since the microbial decomposition treatment function and the like can be exerted from the beginning of the installation of the waste water purification device, environmental pollution occurs when the purified water purified by the waste water purification device is discharged to the outside. In addition to being able to effectively prevent this, there is an advantage that effective use of water resources can be achieved by using the purified water as toilet wash water.

In addition, when the wastewater is aerated in the first middle flow purification treatment chamber 5 and the third middle flow purification treatment chamber 7 and the treated water is acidified, calcium carbonate (CaCO ₂ ) is produced from the shells and shells. Can be dissolved quickly to neutralize the treated water. That is, since the shell from which the nacreous layer b has been removed has a characteristic that its dissolution is easy to proceed, there is an advantage that the acidified treated water can be effectively neutralized.

  Moreover, since the treated water is neutralized in the third middle-stream purification treatment chamber 7 as described above, a large amount of protozoa such as solar insects and coelenterates can be generated and propagated. For this reason, bacteria such as Escherichia coli present in the treated water are effectively fed into the clarified treated water derived from the wastewater purification treatment device by feeding on the protozoa and extinguishing the bacteria. Can be prevented.

Further, when the treated water contains a phosphorus component, as shown in the following formula, Ca ions liberated from the calcium carbonate and phosphorus ions (HPO ₄ ) in the treated water are effectively reacted. Thus, the treated water can be quickly neutralized to produce calcium phosphate (Ca (OH) (PO ₄ ) ₃ ). Then, the calcium phosphate (Ca (OH) (PO ₄ ) ₃ ) is used as a fertilizer by adsorbing and recovering the calcium phosphate (Ca (OH) (PO ₄ ) ₃ ) on the activated carbon in the activated carbon container 22 disposed in the purified water storage chamber 9. There is an advantage that it is possible.

5Ca + 3HPO ₄ → Ca (OH) (PO ₄ ) ₃ + 3H ₂ O
A part of the calcium phosphate (Ca (OH) (PO ₄ ) ₃ ) in the treated water is precipitated in the most downstream purification treatment chamber 8 and is adsorbed by the filter body 17, and the rest is the activated carbon adsorption chamber 22. It will be adsorbed by the activated carbon. In order to remove a small amount of phosphorus component remaining in the treated water, it is desirable to have a structure in which a phosphorus adsorption cylinder filled with shells such as oyster shells is disposed in the activated carbon adsorption chamber 22.

  Moreover, in the said embodiment, the circulating means 25 as shown in FIG. 5 is provided, the said purified water storage is carried out by attracting | sucking the treated water in the purified water storage chamber 9, and discharging it to the lower part of the said activated carbon container 22. FIG. Since the treatment water is circulated in the chamber 9, the pigment component in the treatment water can be effectively adsorbed by the coal-based activated carbon accommodated in the activated carbon container 22 to improve the decolorization action. There are advantages.

  Furthermore, in the above embodiment, the first middle-stream purification treatment chamber 5 in which the plastic contact material 11 is filled on the upstream side of the third middle-stream purification treatment chamber 7 and the treated water treated in the first middle-stream purification treatment chamber 5. Since the second middle-stream purification treatment chamber 6 comprising a sedimentation chamber for precipitating impurities and the like is disposed so that the waste water is purified to some extent, the third middle-stream purification treatment chamber 7 is supplied. There is an advantage that it is possible to effectively suppress the shells such as oyster shells disposed in the processing chamber 7 from being polluted at an early stage or from being dissolved and lost.

  In addition, a purified water supply means 47 is provided for supplying purified water stored in the purified water storage tank 2 into the most upstream purification processing chamber 4, and purified water stored in the purified water storage chamber 9 is supplied to Instead of the above-described embodiment in which the water supply means 28 having the cleaning pipes 31 to 33 to be supplied as cleaning water is provided in the first middle flow purification processing chambers 5, 7 and the most downstream purification processing chamber 8, the purified water storage chamber 9 Purified water supply means for supplying the purified water stored in the uppermost purification process chamber 4 and purified water stored in the purified water storage tank 2 to the first and third intermediate flow purification process chambers 5, 7. And it is good also as a structure which provided the purified water supply means supplied in the most downstream purification processing chamber 8 grade | etc.,.

  Further, instead of the recirculation means having a recirculation passage 35 for recirculating the treated water in the first and third intermediate flow purification treatment chambers 5 and 7 into the uppermost flow purification treatment chamber 4, a treated water transfer pump or an air lift (compressed air) The treated water may be forcibly recirculated into the uppermost stream purification treatment chamber 4 by providing a transfer means using

  Further, as shown in FIG. 7, a first suction pipe 51 that sucks purified water stored in the purified water storage chamber 9 and a second suction that sucks purified water stored in the purified water storage tank 2. Purification having a pipe 52, a water supply pump 53 disposed on the upstream side of the joining portion of both suction pipes 51, 52, and washing pipes 54-57 for supplying washing water into the respective purification treatment chambers 4-8. The water supply means 58 is provided, and the water supply pump 53 is operated in a state where one of the on-off valves 59 and 60 provided in the suction pipes 51 and 52 is closed and the other is opened. The sludge components adhering to the inner wall surfaces of the respective purification treatment chambers 4 to 8 by sucking the purified water in the chamber 9 or the purified water storage tank 2 and selectively supplying them into the respective purification treatment chambers 4 to 8 May be sequentially removed.

  Furthermore, in the purified water storage chamber 9 provided in the most downstream part of the purification treatment tank 1, as shown in FIG. 8, a plurality of activated carbon containers 22a to 22c are installed, and the treatment discharged from the circulation pump 23 Branch pipes 24a to 24c for discharging water to the lower portions of the respective activated carbon containers 22a to 22c are provided, and the detected pressure of the pressure gauge 61 provided on the circulation pipe 24 located upstream of the branch pipes 24a to 24c is set. Accordingly, the activated carbon containers 22a to 22c to be used may be sequentially switched by controlling the automatic opening and closing valves 62a to 62c provided in the branch pipes 24a to 24c.

  That is, while the automatic open / close valve 62a provided in the branch pipe 24a is opened and the other automatic open / close valves 62b and 62c are closed, the circulating pump 23 is operated, whereby the pressure gauge 61 is used to treat the treated water. , The treated water is supplied to the first activated carbon container 22a. If the processing capacity of the first activated carbon container 22a is reduced due to clogging or the like, the pressure detected by the pressure gauge 61 is increased. Accordingly, the opening / closing control of the automatic opening / closing valves 62a to 62c is accordingly performed. By executing this, the activated carbon containers 22a to 22c to be used are sequentially switched. By comprising in this way, there exists an advantage that a running cost can be reduced by setting appropriately the use time and frequency of each activated carbon container 22a-22c.

  In addition, while installing the some activated carbon container 22a-22c in the said purified water storage chamber 9, as shown in FIG. 9, it supplies and circulates treated water to the lower part of each activated carbon container 22a-22c, respectively. It is good also as a structure which provided separately the circulation means 25a-25c which has the some circulation pumps 23a-23c and the circulation pipes 24a-24c, or each activated carbon container by a single circulation pump (not shown) with a big capacity | capacitance. You may comprise so that treated water may be simultaneously supplied with respect to the lower part of 22a-22c.

  Further, as shown in FIG. 10, the abnormality of the purified water stored in the purified water storage tank 2, that is, the amount of the purified water stored in the purified water storage tank 2 becomes equal to or greater than a reference value. Detects whether abnormalities such as ph, chromaticity (turbidity), and residual chlorine concentration have deteriorated below the standard value due to the water being full or the quality of the stored purified water being reduced It is also possible to provide a structure provided with an abnormality detection means 63 for transmitting and a transmission means 65 for transmitting an abnormality detection signal to the management unit 64 when an abnormality is detected in the abnormality detection means 63. When configured in this way, the purification function of the waste water by the purification treatment chambers 4 to 8 provided in the purification treatment tank 1 is reduced, or a large amount of waste water is introduced into the waste water treatment tank 1 at a time, etc. Thus, since the purification function of the waste water by each of the purification treatment chambers 4 to 8 is in a state of being insufficient, it is possible to appropriately recognize the administrator that the inspection work, the repair work, and the like are necessary.

  As shown in FIG. 11, a drainage storage tank 66 is provided in parallel with the uppermost purification process chamber 4 of the purification process tank 1, and the wastewater stored in the uppermost purification process chamber 4 is disposed in the drainage storage tank 66. By providing a transfer means 69 provided with a transfer pump 67 and a transfer pipe 68 for transferring the waste water in the uppermost stream purification treatment chamber 4 to the waste water storage tank 66 as necessary. .

  For example, the inside of the purified water storage tank 2 is filled with purified water in accordance with the detection signal of the abnormality detection means 63 that detects an abnormality of the purified water stored in the purified water storage tank 2, or the most upstream purification processing chamber. 4, when it is detected that an abnormality has occurred such as a large amount of wastewater flowing in and the quality of the purified water is lowered, the transfer pump 67 operation command signal is output from the control means 48 to By operating 67, the waste water in the most upstream purification treatment chamber 4 is transferred into the waste water storage tank 66, and then an operation command signal is output from the control means 48 to the water supply pump 46 of the purified water supply means 45. You may comprise so that the purified water in the purified water storage tank 2 may be supplied to the inside of the uppermost purification process chamber 4 etc. of the purified treatment tank 1 by operating the pump 46. 10 and 11, 47 a is a three-way switching valve that switches the supply direction of the purified water supplied to the purification treatment chambers 4 to 6 by the purified water supply means 47.

  In the case of the configuration described above, since the work of sucking out the waste water and leading it out to the outside can be performed at the same time, the period of performing the inspection work and the repair work of the purification tank 1 is approximately doubled. There is an advantage that it can be extended. Instead of the embodiment in which the transfer pump 67 forcibly transfers the wastewater in the uppermost purification treatment chamber 4 into the wastewater storage tank 66, the wastewater in the uppermost purification treatment chamber 4 is allowed to overflow. Thus, the waste water may be transferred into the waste water storage tank 66.

  In addition, as shown in FIG. 12, a plurality of wastewater containing sludge components such as sewage discharged from a toilet or generated wastewater generated by pulverizing raw garbage with a disposer are gradually purified. A purification treatment tank 1 having a purification treatment chamber 4 to 8 and a purification water storage chamber 9 for storing the purified water derived from the most downstream purification treatment chamber 8 located at the most downstream portion of the purification treatment chamber 1. The purified water storage tank 2 connected to the most downstream portion, the sludge treatment tank 70 installed in parallel with the most upstream purification treatment chamber 4 located at the most upstream part of the purified water treatment tank 1, and the most upstream purification Transfer means 71 comprising a transfer pipe or the like for transferring the wastewater stored in the processing chamber 4 to the sludge decomposition tank, and the sludge components in the wastewater transferred to the sludge decomposition tank 70 via the transfer means 71. An anaerobic decomposition chamber 72 for anaerobic decomposition treatment, The sludge decomposition tank 70 includes an aerobic decomposition chamber 73 for aerobically decomposing treated water derived from the decomposition chamber 72 and a precipitation separation chamber 74 for performing precipitation separation treatment on the treated water derived from the aerobic decomposition chamber 73. It is good also as a structure provided in.

  In the anaerobic decomposition chamber 72, methane gas is generated by decomposing organic substances constituting sludge components in the wastewater overflowed or forcedly transferred from the uppermost purification treatment chamber 4 through the transfer means 71 under anaerobic conditions. Contains methane bacteria. The aerobic decomposition chamber 73 contains aerobic organisms that decompose residual organic components in the treated water led out from the anaerobic decomposition chamber 72 and nitrify ammonia. The treated water that has been decomposed by the aerobic biodegradation chamber 73 and led to the precipitation separation chamber 74 is subjected to precipitation treatment in the precipitation section adjacent chamber 74, and is then sprinkled or discharged, or recycled as fire prevention water or the like. Used.

  The anaerobic decomposition chamber 72 is provided with a circulation pipe 75 that circulates a part of the drainage accommodated therein. The circulation pipe 75 is heated to 70 ° C. or higher with the sludge component in the waste water circulating in the circulation pipe 75 by waste heat or steam supplied from the boiler 76, so that the fibers and keratin in the sludge component are heated. The temperature in the anaerobic decomposition chamber 72 is a temperature suitable for medium temperature fermentation by methane fermentation bacteria of about 35 ° C. to 37 ° C., or methane fermentation bacteria of about 53 ° C. to 56 ° C. The heating means which consists of the heater 77 heated to the temperature suitable for high temperature fermentation by is provided. The boiler 76 is configured to generate steam by using the methane gas generated in the anaerobic decomposition chamber 72 as fuel and heating the purified water in the purified water storage tank 2.

  According to said structure, the sludge component in the waste_water | drain transferred from the most upstream purification process chamber 4 to the sludge decomposition tank 70 via the transfer means 71 is made into the said anaerobic decomposition chamber 72, the aerobic decomposition chamber 73, and precipitation decomposition | disassembly. Since the sludge components can be efficiently decomposed by performing the purification process step by step in the chamber 74, even when waste water exceeding the treatment capacity of the purification tank 1 is supplied, Further, there is an advantage that biogas such as methane gas generated in the anaerobic decomposition chamber 72 can be effectively used as fuel for the boiler 76 and the like.

  In the above embodiment, the sludge component in the wastewater transferred to the anaerobic decomposition chamber 72 of the sludge decomposition tank 70 via the transfer means 17 is heated to 70 ° C. or more, so that the fibers and nuclei in the sludge component are heated. Since the heating means 77 for promoting the decomposition of the quality is provided, the sludge components in the wastewater transferred to the anaerobic decomposition chamber 72 of the sludge decomposition tank 70 are heated to a predetermined temperature to promote the decomposition of the fibers and nuclei. In addition, there is an advantage that the waste water can be purified more effectively by heating the inside of the anaerobic decomposition chamber 75 to a temperature suitable for the fermentation action of methane bacteria.

It is explanatory drawing which shows the whole structure of a waste water purification apparatus. It is a top view which shows the whole structure of the said waste water purification apparatus. It is sectional drawing of the shell which comprises a shell contact material. It is sectional drawing which shows the state which removed the pearl layer of the shell. It is a perspective view which shows the specific structure of the circulation means provided in the most downstream purification | cleaning processing chamber. It is a front view which shows the specific structure of a recirculation | reflux channel | path. It is a top view which shows another example of a waste water purification apparatus. It is explanatory drawing which shows the example of installation of an activated carbon container. It is explanatory drawing which shows another example of installation of an activated carbon container. It is a top view which shows another example of a waste water purification apparatus. It is a top view which shows another example of a waste water purification apparatus. It is a top view which shows another example of a waste water purification apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Purification processing tank 2 Purified water storage tank 4 Uppermost stream purification processing chamber 5 1st middle flow purification treatment chamber 6 2nd middle flow purification treatment chamber 7 3rd middle flow purification treatment chamber 8 Final purification treatment chamber 9 Purified water storage chamber

Claims (1)

  A purification treatment tank having a plurality of purification treatment chambers for gradually purifying wastewater containing sludge components such as sewage discharged from the toilet, and the purification treatment tank are formed separately from the purification treatment tank. A purification method of a wastewater purification apparatus having a purified water storage tank for storing purified water derived from the water, and after conducting the drainage of the wastewater and treated water contained in the plurality of purification treatment chambers, The purified water stored in the purified water storage tank is attached to the inner wall of the uppermost purification chamber by supplying the cleaning water from the upper part of the uppermost purification chamber located in the uppermost stream of the purification tank. A cleaning method for a wastewater purification apparatus, wherein the sludge component and the like are removed, and the uppermost purification treatment chamber and the purification treatment chamber downstream thereof are filled with washing water comprising the purified water.

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