JP2008000720A - Purification apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a purification apparatus which can be miniaturized while ensuring purifying performance. <P>SOLUTION: The purification apparatus is equipped with a purification tank 10 having a plurality of purification chambers 2-8 for stepwisely purifying dirt-containing domestic wastewater of a toilet 50 and the like, and wastewater from a factory, a hotel, a hospital, etc., and a filtration tank 20 for filtering the above wastewater. A plurality of the purification chambers comprises an adsorption chamber 8 with an adsorbent 8d for adsorbing and removing suspension and the like in the wastewater. The filtration tank 20 comprises a suction means 21 connected to one purification chamber 5 among the purification chambers, installed upstream of the adsorption chamber 8, and sucking treated water in the purification chamber 5, a filter tank 22 having a filter medium 24, and filtering the sucked treated water, and a returning means 23 for returning the filtered treated water to the purification chamber 5 upstream of the adsorption chamber 8. The treated water in the purification chamber 5 is filtered repeatedly by the filtration tank 20. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a purification device for purifying household wastewater such as toilets containing sludge components and wastewater from factories, hotels, hospitals and the like.

Conventionally, a combined septic tank having a precipitation separation chamber, a contact aeration tank, and the like is used as the clarifier, and in Patent Document 2, a sand filter is provided downstream of the combined septic tank, and further downstream thereof. A purification device provided with a membrane separation device or the like is disclosed. In this purification device, purified water discharged from the combined septic tank is introduced into a sand filtration device and filtered, and then the treated water is introduced into a membrane separation device and the like for purification treatment.
JP 2003-126893 A

  The purification device introduces the purified water discharged from the combined septic tank into the sand filtration device, and guides the treated water filtered by the sand filtration device to a downstream membrane separation device, etc. The filtration process in is performed only once. Therefore, when processing a large amount of waste water, there is a problem that it is necessary to increase the size of the sand filtration device, which increases costs.

  This invention is made | formed in view of the said point, and it aims at providing the purification apparatus which can ensure purification performance, aiming at space saving by reducing the size of a filtration apparatus.

  In order to solve the above-mentioned problems, the present invention provides a purification treatment tank having a plurality of purification treatment chambers for stepwise purification of domestic wastewater such as toilets containing sludge components and wastewater from factories, hotels, hospitals, etc. A filtration tank for filtering the waste water, and the plurality of purification treatment chambers include an adsorption treatment chamber having an adsorbent for adsorbing and removing suspended matters in the waste water, and the filtration tank. A suction unit that is connected to a purification treatment chamber provided upstream of the adsorption treatment chamber in the purification treatment chamber and sucks the treated water in the purification treatment chamber, and has a filter medium to filter the sucked treatment water. And a reflux means for refluxing the filtered treated water to the purification treatment chamber upstream of the adsorption treatment chamber, and the treated water in the purification treatment chamber is repeatedly filtered by the filtration treatment vessel. Purification device characterized by To provide.

  According to such a configuration, since the treated water in the purification treatment chamber provided upstream of the adsorption treatment chamber is repeatedly filtered, the suspended matter in the treated water is sufficiently removed without increasing the size of the filtration tank. It is possible to prevent clogging of the adsorbent provided in the adsorption processing chamber. Furthermore, since the microorganisms adhering to the filter medium and the treated water repeatedly come into contact with each other, the decomposition treatment by microorganisms such as organic suspended solids in the treated water is promoted, so that the purification performance can be improved.

  In the present invention, it is preferable that the adsorption treatment chamber has an activated carbon container as the adsorbent.

  According to such a configuration, clogging of the activated carbon container can be suppressed, and the running cost of the relatively expensive activated carbon can be kept low.

  Moreover, in this invention, the said filtration tank has a backwash water inlet for introducing tap water etc. into the said filtration tank from the outside as backwash water for removing the floating substance adhering to the said filter medium, etc. Is preferred.

  According to such a configuration, by introducing tap water or the like as backwash water from the backwash water introduction port and backwashing the filter medium, it is possible to ensure the processing capacity of the filter medium and repeatedly use the filter medium. Become.

  In the present invention, the filtration tank introduces backwash water from the backwash water inlet based on the pressure detection means for detecting the pressure on the downstream side of the filtration tank and the detection result of the pressure detection means. And control means for controlling the amount of backwash water to be introduced.

  When suspended matter in the treated water adheres to and clogs the filter medium, the downstream pressure of the filtration tank decreases. Therefore, if this downstream pressure is detected, the degree of blocking of the filter medium can be determined. Therefore, if the timing of introducing the backwash water and the amount of backwash water to be introduced are controlled based on this detection result, it is appropriate. It is possible to backwash the filter medium efficiently at an appropriate timing.

  Moreover, in this invention, while the purified water storage chamber which can store the purified water produced | generated from the said waste_water | drain is provided in the most downstream position among these purification treatment chambers, the said filtration treatment tank is the said backwash water It is preferable to have purified water supply means connected to the inlet and supplying purified water stored in the purified water storage chamber to the filtration tank as backwash water.

  According to such a configuration, since the purified water stored in the purified water storage chamber can be used as the backwash water, it is advantageous in terms of cost compared to the case where tap water or the like is used as the backwash water. .

  Further, in the present invention, the filtration of the treated water deriving means for deriving treated water containing suspended matters generated when the filter medium is backwashed to a purification treatment chamber provided in the uppermost stream among the plurality of purification treatment chambers. It is preferable to provide in a processing tank.

  According to such a configuration, the suspended matter or the like can be recirculated into the purification treatment chamber and reprocessed, and sewage containing the suspended matter or the like can be prevented from flowing out.

  Moreover, in this invention, if the sand filtration apparatus which uses a filter medium as sand or a stone is used as the said filtration treatment tank, SS in treated water can be removed efficiently.

  As described above, according to the present invention, it is possible to provide a purification device that can efficiently purify domestic wastewater such as toilets containing sludge components and wastewater from factories, hotels, hospitals, etc. without increasing the size of the device. it can.

  1 and 2 show an embodiment of a purification device according to the present invention.

  The purification device 1 includes a purification treatment tank 10 having a plurality of purification treatment chambers 2 to 8 and a filtration treatment tank 20. The purification treatment tank 10 is made of a steel plate material, an aluminum alloy material, a stainless steel material, a plastic material, a PC (prestressed concrete) material, a reinforced concrete material, an FRP (fiber reinforced plastic) material or a plastic material, and is buried in the ground. Or, it is used in a standing condition on the ground. Further, the purification treatment chambers 2 to 8 are, from the upstream side, the precipitation separation chamber 2, the contact aeration chamber 3, the precipitation chamber 4, the first contact filtration chamber 5, the second contact filtration chamber 6, the precipitation filtration chamber 7, and the purified water. It is a storage chamber 8 (adsorption processing chamber), and openings 30 to 34 for cleaning or inspection are formed on the upper surface thereof. Furthermore, a closing lid for closing the openings 30 to 34 so as to be opened and closed is provided. The filtration tank 20 is connected to the first contact filtration chamber 5, the precipitation separation chamber 2, and the purified water storage chamber 8.

  The sedimentation separation chamber 2 provided in the uppermost stream is provided with an introduction port 2 a that is connected to a drainage port of a flush toilet 50 or a bathroom via a pipe 11 and introduces sewage or the like. The sedimentation separation chamber 2 is configured to precipitate and separate the sludge components such as paper and coarse foreign matters in the introduced wastewater, and then overflow the treated water into the downstream contact aeration chamber 3 to lead out. Has been. Further, a baffle plate 2 b is provided in the sedimentation separation chamber 2 and is partitioned so as to prevent floating substances from flowing into the contact aeration chamber 3. The solid content precipitated in the precipitation separation chamber 2 is sucked out and processed regularly (for example, every year).

  Further, the pipe 11 is connected with a treated water deriving means 26 of a filtration tank 20 described later, so that the treated water after backwashing led out from the filtration tank 20 is introduced into the precipitation separation chamber 2. It is configured.

  A contact aeration chamber 3 provided downstream of the sedimentation separation chamber 2 is filled with a conventionally known plastic contact material 3a, and an air diffuser 3b for releasing air supplied from the blower 60 is provided with the plastic contact. It is arranged below the material 3a. And the sludge component contained in the treated water introduced by overflowing from the upper part of the sedimentation separation chamber 2 is agitated by the air released from the air diffuser 3b, adheres to the plastic contact material 3a, and inhabits. It is configured to be decomposed by the microorganisms.

  The treated water treated in the contact aeration chamber 3 is introduced into the sedimentation chamber 4 through the communication path 3c provided below. The sedimentation chamber 4 is configured such that the microbial mass contained in the treated water introduced from the contact aeration chamber 3 precipitates, and the treated water overflows to the first contact filtration chamber 5 via the connecting pipe 12. Has been.

  In the first contact filtration chamber 5, a shell made of oysters, scallops, sea bream, pearl oysters, clams, swordfish, clams, blue goats, crows, scallops, mill shells, shell fossils, etc. Alternatively, a shell / slag contact material 5a containing dead and whitened shells is filled, and an air diffuser 5b for discharging air supplied from the blower 60 is disposed below the shell / shell contact material 5a. The shell / smoked contact material 5a is inhabited with microorganisms attached thereto, and the sludge components in the treated water introduced from the sedimentation chamber 4 into the first contact filtration chamber 5 are diffused from the air diffuser 5b. It is configured to be decomposed by microorganisms adhering to the shell / smoked contact material 5a while being agitated by the released air.

  Moreover, the filtration tank 20 is connected to the first contact filtration chamber 5, and the treated water introduced into the first contact filtration chamber 5 is decomposed by the shell / smoked contact material 5a as described above. In addition, the filtration tank 20 is configured to be filtered.

  The filtration tank 20 includes a suction pump (suction means) 21 for sucking treated water from the first contact filtration chamber 5, a filtration tank 22 for filtering the sucked treated water, and treated water after filtration. And a reflux means 23 for refluxing the first contact filtration chamber 5 to the first contact filtration chamber 5. Moreover, as shown in FIG. 3, the inside of the filtration tank 22 is filled with a plurality of types of sand having different particles as the filter medium 24, and the sand is laminated so that the particles become smaller toward the upper side. .

  The treated water sucked by the suction pump 21 is introduced into the filtration tank 22 from an inlet 22a provided above the filtration tank 22, and is filtered by passing through the filter medium 24 downward. The treated water filtered by the filter medium 24 is again introduced into the first contact filtration chamber 5 by the reflux means 23 provided below the filter tank 22, and is decomposed by the shell / smoked contact material 5a. Again, it is introduced into the filtration tank 20 by the suction pump 21. In this manner, the treated water in the first contact filtration chamber 5 is purified by being repeatedly filtered through the filtration treatment tank 20 while being decomposed by the shell / boiled contact material 5a. In particular, in the filtration treatment, SS contained in the treated water is removed. Therefore, since adhesion of SS to the shell / smoked contact material 5a filled in the first contact filtration chamber 5 is suppressed, it is possible to suppress a decrease in the purification function of the shell / smoked contact material 5a.

Moreover, since microorganisms contained in the treated water adhere to the surface of the filter medium 24 and propagate, the sludge components contained in the treated water are decomposed by the microorganisms by repeatedly introducing the treated water into the filter medium 24. There is an effect. For example, when 3 m ³ treated water is introduced into the first contact filtration chamber 5 and the capacity of the filtration tank 22 is 0.9 m ³ , the filtration treatment can be repeated 7.2 times a day. Can be sufficiently purified. Moreover, the filtration process tank 20 can be reduced in size by comprising so that the filtration process may be repeated in one filtration process tank 20 in this way, and the space saving of the whole apparatus can be achieved.

  The treated water purified by the filtration treatment and the shell / smoked contact material 5 a as described above is then introduced into the second contact filtration chamber 6. As in the first contact filtration chamber 5, the second contact filtration chamber 6 is filled with a shell / smoked contact material 6 a in which a shell or the like is housed in a mesh-like bag body, and a dust disposed below. Air is supplied by the trachea 6b. And it is comprised so that the sludge component in the introduced treated water may be decomposed by microorganisms adhering to the shell / smoked contact material 6a. Here, since the treated water introduced into the second contact filtration chamber 6 is treated water from which SS has been sufficiently removed by the filtration treatment tank 20 as described above, the shell / smoked contact material 6a is clogged. Is suppressed, and the purification function can be sufficiently exerted.

  The treated water decomposed in the second contact filtration chamber 6 is led to the precipitation filtration chamber 7. The precipitation filtration chamber 7 has a filter body 7a in which a porous zeolite is accommodated, and precipitates impurities in the introduced treated water and separates them into sewage and supernatant water, and fine impurities in the supernatant water. Is filtered through the filter body 7a to generate purified water. And this filter body 7a can also exhibit sufficient purification | cleaning function by clogging by SS similarly to the said shell and smoked contact material 6a.

  The purified water generated in the precipitation filtration chamber 7 is finally discharged by overflowing into the purified water storage chamber 8. In the purified water storage chamber 8, as shown in FIG. 4, an adsorption cylinder 8c in which partition plates 8a and 8b in which a plurality of through holes are formed are installed up and down, and a partition plate 8a in the adsorption cylinder 8c, 8b includes an activated carbon container 8d that is an adsorbent disposed between 8b, and a circulation pump 40a and a circulation pipe 40b that suck the treated water in the purified water storage chamber 8 and discharge it to the lower portion of the activated carbon container 8d. Circulation means 40 is provided. The activated carbon container 8d is configured by filling a bag made of a cloth material or the like with coal-based activated carbon.

  And the treated water discharged to the lower part of the activated carbon container 8d by the circulation means 40 circulates in the purified water storage chamber 8 through the adsorption cylinder 8c, and at that time, the activated carbon container 8d. The pigment component is adsorbed by the coal-based activated carbon inside and is effectively decolorized. As shown in FIG. 1, a part of the decolorized purified water is supplied to the water supply tank of the toilet 50 and the rest is stored in the purified water storage chamber 8. And this activated carbon container 8d is also clogged because SS in the treated water is sufficiently removed by the filtering action of the filtration treatment tank 20 in the same manner as the shell / smoked contact material 6a and the filter 7a. Deterred and the purification function is secured for a long time. For this reason, there is an advantage that an increase in running cost due to frequent replacement of the activated carbon container 8d can be suppressed.

  Here, as shown in FIG. 4, a fine bubble generating device 41 is provided in the middle of the circulating means 40. The fine bubble generator 41 includes a gas supply unit 41a that supplies ozone to treated water, and a bubble generation unit 41b that shears the supplied ozone to generate ultrafine bubbles called microbubbles. The gas supply part 41a is provided with a gas inlet 41d that can be connected to an ozone generator, and ozone generated by the ozone generator is supplied to the gas supply part 41a. The bubble generation unit 41b is provided with a bubble generation unit 41c for generating microbubbles, and the ozone supplied by the bubble generation unit 41c is mixed into the treated water as microbubbles. The microbubbles generated in the bubble generating part 41b are introduced into the purified water storage chamber 8 together with the treated water.

  Microbubbles are bubbles having a bubble diameter of about 10 μm to 20 μm, and have a high dissolution effect in water. Moreover, since ozone has a decoloring effect, decolorization of treated water is promoted by the microbubbles containing ozone. Accordingly, the burden on the activated carbon container 8d in the purified water storage chamber 8 can be reduced, and the number of replacements of the activated carbon container 8d can be reduced, so that an increase in running cost can be further suppressed. Further, since the microbubbles generated by the fine bubble generating device 41 have an effect of removing the sludge component, SS attached to the activated carbon container 8d is effectively removed.

  As described above, the sewage discharged from the flush toilet 50 or the like is purified by the respective purification treatment chambers 2 to 8 and the filtration treatment tank 20 to become purified water that can be used again, and is returned to the flush toilet 50. In particular, when microbubbles are contained in the purified water as described above, dirt on the flush toilet 50 can be effectively removed by the action of removing sludge components by the microbubbles.

  Here, the shell contained in the shell / smoked contact material 5a, 6a is mainly composed of calcium carbonate and contains components such as calcium phosphate, potassium and magnesium carbonate, and the nacreous layer is removed. It is housed in the bag. In particular, the use of oyster shells from which the nacreous layer is removed to expose the porous prismatic layer increases the affinity between microorganisms adhering to the oyster shells and sludge components in the treated water. it can. And by this microorganism propagated in the porous prismatic layer, the sludge component in the treated water can be effectively decomposed to efficiently purify the waste water.

  However, even if the nacreous layer is not removed in advance, the nacreous layer is naturally removed during the operation of the purification device 1, so that it is possible to obtain substantially the same effect as when the nacreous layer is removed in advance. .

  Next, a method for backwashing the filter medium 24 and peeling off suspended matters such as SS from the filter medium 24 to recover the filtration performance of the filtration tank 22 will be described.

  The filtration tank 20 is connected to the purified water storage chamber 8 in addition to the suction pump 21 and the reflux means 23, and supplies the purified water stored in the purified water storage chamber 8 to the filtration tank 22. The purified water suction pump 25 (purified water supply means) and the pipe 11 connected to the precipitation separation chamber 2, and treated water for discharging the waste water after backwashing of the filtration tank 22 to the precipitation separation chamber 2. Deriving means 26 is provided. Further, backwash water inlets 25 a and 25 b are provided above and below the filtration tank 22, and are connected to the purified water suction pump 25, respectively.

  The purified water sucked by the purified water suction pump 25 is introduced into the filtration tank 22 from the backwash water inlet 25 a provided above the filtration tank 22, and the surface of the filter medium 24 is washed. Further, the purified water is introduced into the filtration tank 22 from a backwash water inlet 25 b provided below the filtration tank 22, flows in the filtration tank 22 in the direction opposite to the filtration direction, and floats attached to the filter medium 24. And so on. Then, the treated water containing the separated suspended matter and the like is led out of the filtration tank 22 by the treated water lead-out means 26 from a treated water outlet 26 a provided above the filtration tank 22. Further, the treated water containing the suspended matter is configured to be refluxed to the precipitation separation chamber 2 by the treated water deriving means 26, and the suspended matter is precipitated and separated in the precipitation separation chamber 2, and periodically as described above. Are sucked out and processed.

  Here, the above-described backwashing of the filter medium 24 may be performed as appropriate, but in this embodiment, a pressure sensor (pressure detection means) 27 is provided below the filtration tank 22 and the output of the pressure sensor 27 is used. A control device (control means) 28 for controlling the timing of backwashing and the amount of backwashing water is provided so that the backwashing can be performed automatically.

  That is, when the filter medium 24 is clogged and it becomes difficult for the treated water to flow, the pressure on the downstream side of the filtration tank 22 decreases. Therefore, this pressure is detected by the pressure sensor 27, and the detected value becomes a predetermined value or less. At this time, the purified water suction pump 25 is driven to control the backwash water to be introduced into the filtration tank 22. Moreover, the adjustment valve 29 which adjusts the introduction amount of the backwash water introduce | transduced into the filtration tank 22 is provided, and the introduction amount of purified water is controlled by controlling the opening degree of this adjustment valve 29. FIG. If it does in this way, according to the adhesion degree of the suspended | floating matter to the filter medium 24, it can backwash efficiently on optimal conditions.

  Here, when performing the backwash, the suction of the treated water by the suction pump 21 is stopped so that the treated water from the first contact filtration chamber 5 is not introduced into the filtration tank 22. Moreover, in this embodiment, the backwash water inlet 25b provided below the filtration tank 22 and the reflux port for refluxing the treated water after the filtration treatment to the first contact filtration chamber 5 by the reflux means 23 are common. However, by providing a check valve in each of the pipe connecting the purified water suction pump 25 and the backwash water inlet 25b and the pipe connected to the reflux means 23, the purified water can be used during backwashing. Is prevented from being led to the first contact filtration chamber 5 through the reflux means 23.

  As mentioned above, according to the said embodiment which concerns on this invention, the filtration processing tank 20 is connected with the 1st contact filtration chamber 5, and the purification function is obtained by repeatedly filtering the treated water in the 1st contact filtration chamber 5. The filtration tank 20 can be downsized while ensuring the above. Further, by repeatedly filtering the treated water, the decomposition treatment of the sludge components in the treated water by the microorganisms attached to the filter medium 24 is promoted. Further, since SS in the treated water is removed by this filtration treatment, the shell / smoked contact material 5a provided in the first contact filtration chamber 5 and the shell of the second contact filtration chamber 6 provided downstream thereof. -Adherence of SS to the smoked contact material 6a, the filter body 7a of the sedimentation filtration chamber 7 and the activated carbon container 8d of the purified water storage chamber 8 is suppressed, and the purification function of these contact materials and the like can be improved. Moreover, since the exchange period of this contact material etc. can be lengthened, it becomes advantageous also in terms of cost.

  Here, in the said embodiment, although the case where the inlet 2a of the sedimentation separation chamber 2 was connected to the drain outlet of the flush toilet 50 and the waste water from the flush toilet 50 was purified was shown, instead of this flush toilet 50, it was shown. In addition, it can be connected to drainage facilities such as factories, hotels, hospitals, etc. to purify sewage discharged from factories, etc., or it can be connected to rainwater catchment or irrigation canals, etc. Good.

  Moreover, although shown about the case where the filtration processing tank 20 was connected with the 1st contact filtration chamber 5, you may connect not only to this but to another purification processing chamber.

  Moreover, although shown about the case where the backwash water inlet 25a, 25b of the said filtration tank 20 was connected to the purified water storage chamber 8, this backwash water inlet 25a, 25b was connected to the faucet etc. of water supply, Tap water may be supplied as backwash water. Furthermore, although the case where the treated water after backwashing is led out to the precipitation separation chamber 2 is shown, it may be configured to be discharged to the outside.

  Moreover, in the said embodiment, although the case where the purified water processed with the purification apparatus 1 was supplied to the water supply tank of the flush toilet 50 was shown, the usage method of purified water is not restricted to this, Agricultural water, car wash water, and water hitting water It can be used in various directions such as as

  Moreover, although the said embodiment showed about the case where the fine bubble generator 41 was connected to the circulation means 40 of the purified water storage chamber 8, this fine bubble generator 41 is connected to the said precipitation filtration chamber 7, the purified water storage chamber 8, and It is also possible to provide microbubbles in the treated water led out from the sedimentation filtration chamber 7 and introduce the treated water containing the microbubbles into the purified water storage chamber 8. Moreover, you may connect the fine bubble generator 41 to the said precipitation filtration chamber 7, the 1st contact filtration chamber 5, the 2nd contact filtration chamber 6, etc. FIG. When the microbubble generator 41 is thus connected to the precipitation filtration chamber 7 or the like, the filter body 7a of the precipitation filtration chamber 7, the shells and smoked products of the first contact filtration chamber 5 and the second contact filtration chamber 6 are prepared. SS attached to the contact materials 5a and 6a and the like is effectively removed, and the purification performance is improved. Further, the gas suction port 41d of the fine bubble generating device 41 may be opened to the atmosphere to supply air to the gas supply unit 41a. In this case, since dissolved oxygen in the treated water increases, when purified water is used for watering the plant, it effectively acts on the growth of the plant.

  Further, the combination of purification treatment chambers and the processing means in each purification treatment chamber are not limited to the above. For example, the most upstream purification treatment chamber may be an anaerobic treatment chamber for performing anaerobic treatment instead of the precipitation separation chamber 2 for carrying out precipitation separation.

  Further, a purified water storage tank for storing purified water in the purified water storage chamber 8 is separately provided, and the purified water suction pump 25 is connected to the purified water storage tank so that the purified water in the purified water storage tank is reversed. You may make it supply to the filtration tank 22 as washing water.

  Moreover, the filtration tank 20 is not limited to a sand filtration device using sand as a filter medium, but may use other filter medium.

It is explanatory drawing which shows embodiment of the purification apparatus which concerns on this invention. It is sectional drawing of the purification apparatus which concerns on this invention. It is sectional drawing of the filtration processing tank which concerns on this invention. It is a perspective view which shows the specific structure of the circulation means provided in the purified water storage chamber.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Purification apparatus 2 Precipitation separation chamber 3 Contact aeration chamber 4 Precipitation chamber 5 First contact filtration chamber 5a Shell / smoked contact material 6 Second contact filtration chamber 6a Shell / smoked contact material 7 Precipitation filtration chamber 8 Purified water storage chamber (Adsorption processing chamber)
8d Activated carbon container (adsorbent)
10 Purification tank 20 Filtration tank 21 Suction pump (suction means)
22 Filtration tank 23 Recirculation means 24 Filter medium 25 Purified water suction pump (purified water supply means)
25a Backwash water inlet 26 Treated water outlet 27 Pressure sensor (pressure detector)
28 Control device (control means)
50 Flush toilet

Claims (7)

A purification treatment tank having a plurality of purification treatment rooms for gradually purifying domestic wastewater such as toilets containing sludge components and wastewater from factories, hotels, hospitals, etc .;
A filtration tank for filtering the waste water,
The plurality of purification treatment chambers include an adsorption treatment chamber having an adsorbent for adsorbing and removing suspended matters in the waste water, and the like.
The filtration tank is connected to a purification treatment chamber provided upstream of the adsorption treatment chamber in the purification treatment chamber, and has a suction means for sucking treated water in the purification treatment chamber, a filter medium, and the suction A filtration tank for filtering the treated water, and a reflux means for refluxing the filtered treated water to the purification treatment chamber upstream of the adsorption treatment chamber,
The purification apparatus characterized in that the treated water in the purification treatment chamber is repeatedly filtered by the filtration treatment tank. The purification device according to claim 1,
The purification apparatus, wherein the adsorption treatment chamber has an activated carbon container as the adsorbent. The purification device according to claim 1 or 2,
The filtration tank has a backwash water inlet for introducing tap water or the like into the filter tank from the outside as backwash water for removing suspended matter or the like attached to the filter medium. Purification equipment. The purification device according to claim 3,
The filtration treatment tank detects or introduces the backwash water from the backwash water introduction port based on the pressure detection means for detecting the pressure on the downstream side of the filtration tank and the detection result of the pressure detection means. And a control means for controlling the amount of backwash water. The purification device according to claim 3 or 4,
A purified water storage chamber capable of storing purified water generated from the waste water is provided at the most downstream position among the plurality of purification processing chambers,
The filtration tank is connected to the backwash water inlet and has purified water supply means for supplying purified water stored in the purified water storage chamber to the filter tank as backwash water. Purification equipment. A purification device according to any one of claims 3 to 5,
A treated water deriving means for deriving treated water including floating matters generated when backwashing the filter medium to the purification treatment chamber provided in the uppermost stream among the plurality of purification treatment chambers is provided in the filtration treatment tank. A purification device characterized by that. A purification device according to any one of claims 1 to 6,
A purification device, wherein the filtration tank is a sand filtration device using sand or stone as a filter medium.

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