CN217173393U - Integrated sewage treatment device - Google Patents
Integrated sewage treatment device Download PDFInfo
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- CN217173393U CN217173393U CN202220711474.7U CN202220711474U CN217173393U CN 217173393 U CN217173393 U CN 217173393U CN 202220711474 U CN202220711474 U CN 202220711474U CN 217173393 U CN217173393 U CN 217173393U
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- reaction tank
- aeration
- aerobic
- anoxic
- anaerobic
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- 239000010865 sewage Substances 0.000 title claims abstract description 63
- 238000006243 chemical reaction Methods 0.000 claims abstract description 169
- 238000005273 aeration Methods 0.000 claims abstract description 75
- 238000010992 reflux Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 206010021143 Hypoxia Diseases 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 238000005192 partition Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 16
- 239000003344 environmental pollutant Substances 0.000 abstract description 7
- 231100000719 pollutant Toxicity 0.000 abstract description 7
- 230000014759 maintenance of location Effects 0.000 abstract description 5
- 230000001546 nitrifying effect Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 11
- 229910052760 oxygen Inorganic materials 0.000 description 11
- 239000001301 oxygen Substances 0.000 description 11
- 239000010802 sludge Substances 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- NRTLIYOWLVMQBO-UHFFFAOYSA-N 5-chloro-1,3-dimethyl-N-(1,1,3-trimethyl-1,3-dihydro-2-benzofuran-4-yl)pyrazole-4-carboxamide Chemical compound C=12C(C)OC(C)(C)C2=CC=CC=1NC(=O)C=1C(C)=NN(C)C=1Cl NRTLIYOWLVMQBO-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 230000001706 oxygenating effect Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model discloses an integrated sewage treatment device, which comprises a box body, wherein an anaerobic reaction tank, an anoxic reaction tank and an aerobic reaction tank are sequentially arranged in the box body, and aeration systems are arranged in the anaerobic reaction tank, the anoxic reaction tank and the aerobic reaction tank; elastic filler is used in the aerobic reaction tank; a nitrifying liquid reflux system is arranged in the box bodyState and nitrify liquid reflux system including being located backwash pump in the aerobic reaction pond, the backwash pump pass through the return line with oxygen deficiency reaction pond intercommunication, the utility model provides an integrated device of convertible technology operation according to the nature of sewage, through the aeration rate of controlling anaerobism, oxygen deficiency, the three pond in aerobic reaction pond, can switch into A at any time N O process and common active method process, thereby increasing the retention time of the sewage in the corresponding reaction tank to remove the pollutants in the sewage and improving the pollutant removal efficiency.
Description
Technical Field
The utility model relates to a sewage treatment device technical field specifically is an integration sewage treatment plant.
Background
Nowadays, domestic sewage in villages and towns in China has large discharge amount every year and low sewage treatment rate, and most villages do not have sewage discharge pipelines and sewage treatment systems. For the sewage in villages and towns, the sewage treatment device has the characteristics of dispersibility, difficulty in collection, small water quantity, large water quantity fluctuation and the like, is directly discharged, and can bring environmental pollution to the nature.
In the current market, most of the common integrated sewage treatment devices adopt an AAO + sedimentation tank, namely, a process of sequentially treating reaction tanks such as an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank.
The integrated sewage treatment device has problems in actual operation, for example, the actual water quality and the actual water quantity are not consistent with the designed water quality and the designed water quantity in the operation process, the main reason is that the retention time of sewage passing through each reaction tank cannot be adjusted adaptively according to the components of the sewage, and the integrated sewage treatment process cannot be adjusted correspondingly, so that the removal effect of certain pollutants is poor, and therefore, the problems in actual operation are solved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an integration sewage treatment plant can be according to the quality of water yield of actual sewage, through changing aeration rate in each reaction tank, and the corresponding pond that changes the technology and increase the reaction tank holds to increase the dwell time of sewage in the reaction tank and remove the pollutant.
In order to achieve the above object, the utility model provides a following technical scheme:
an integrated sewage treatment device comprises a box body, wherein an anaerobic reaction tank, an anoxic reaction tank and an aerobic reaction tank are sequentially arranged in the box body in an integrated mode, and aeration systems are arranged in the anaerobic reaction tank, the anoxic reaction tank and the aerobic reaction tank;
elastic filler is used in the aerobic reaction tank;
the box is internally provided with a nitrifying liquid reflux system, the nitrifying liquid reflux system comprises a reflux pump positioned in the aerobic reaction tank, and the reflux pump is communicated with the anoxic reaction tank through a reflux pipeline.
As a further aspect of the present invention: and the liquid inlet end of the anaerobic reaction tank uses a twisted fine grid.
As a further aspect of the present invention: and submersible stirrers are arranged in the anaerobic reaction tank and the anoxic reaction tank.
As a further aspect of the present invention: the submersible mixer comprises two alternately working mixing devices.
As a further aspect of the present invention: the anaerobic reaction tank and the anoxic reaction tank are provided with a partition plate, the anoxic reaction tank and the aerobic reaction tank are provided with a partition plate, the top of the partition plate between the anaerobic reaction tank and the anoxic reaction tank is provided with a water through hole, and the bottom of the partition plate between the anoxic reaction tank and the aerobic reaction tank is provided with a water through hole.
As a further aspect of the present invention: the aeration system comprises microporous aeration discs arranged in the anaerobic reaction tank, the anoxic reaction tank and the aerobic reaction tank, the aeration system comprises an aeration main pipe, and the microporous aeration discs in the anaerobic reaction tank, the anoxic reaction tank and the aerobic reaction tank are respectively communicated with the aeration main pipe through aeration branch pipes.
As a further aspect of the present invention: the anaerobic reaction tank is characterized in that an anaerobic aeration pipe valve is arranged on an aeration branch pipe in the anaerobic reaction tank, an anoxic aeration pipe valve is arranged on the aeration branch pipe in the anoxic reaction tank, an aerobic aeration pipe valve is arranged on the aeration branch pipe in the aerobic reaction tank, and the aeration main pipe is connected with an air cabinet.
As a further aspect of the present invention: and aeration pipelines in the anoxic reaction tank and the aerobic reaction tank are connected with condensed water pipelines, and condensed water pipeline valves are arranged on the condensed water pipelines.
As a further aspect of the present invention: the backflow pipeline is provided with a flowmeter, one section of the backflow pipeline, which is close to the backflow pump, is provided with a backflow branch pipe communicated with the aerobic reaction tank, and the backflow branch pipe is provided with a flow regulating valve.
As a further aspect of the present invention: and an effluent weir is arranged on the aerobic reaction tank.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides an integrated device capable of changing process operation, which can be switched into A at any time by controlling the aeration quantity of three tanks of anaerobic, anoxic and aerobic reaction tanks according to the property of sewage N O process and common active method process, thereby increasing the retention time of the sewage in the corresponding reaction tank to remove the pollutants in the sewage and improving the pollutant removal efficiency.
Drawings
FIG. 1 is a schematic diagram of the present embodiment;
fig. 2 is a schematic structural diagram of the present embodiment.
In the figure: 1-box body, 2-anaerobic reaction tank, 3-anoxic reaction tank, 4-aerobic reaction tank, 5-air cabinet machine, 6-rotating strand fine grid, 7-submersible mixer, 8-aeration system, 81-aeration main pipe, 82-aeration branch pipe, 83-anaerobic aeration pipe valve, 84-anoxic aeration pipe valve, 85-aerobic aeration pipe valve, 86-microporous aeration disk, 87-condensed water pipe, 9-elastic filler, 10-nitrified liquid reflux system, 101-reflux pump, 102-flow regulating valve, 103-flowmeter and 11-effluent weir.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, in the embodiment of the present invention, an integrated sewage treatment device comprises a housing 1, an anaerobic reaction tank 2, an anoxic reaction tank 3, and an aerobic reaction tank 4 are integrated in the housing 1, a rotating strand thin grating 6 is used at the liquid inlet end of the anaerobic reaction tank 2, all be equipped with dive mixer 7 in the oxygen deficiency reaction tank 3, dive mixer 7 includes the agitated vessel of two alternative works, two dive mixers can alternative works, guarantee that the stirrer work makes the continuation, anaerobic reaction tank 2 and oxygen deficiency reaction tank 3, all be equipped with the baffle between oxygen deficiency reaction tank 3 and the aerobic reaction tank 4, the baffle top between anaerobic reaction tank 2 and the oxygen deficiency reaction tank 3 is equipped with the limbers, the baffle bottom between oxygen deficiency reaction tank 3 and the aerobic reaction tank 4 is equipped with the limbers, be equipped with out mill weir 11 on the aerobic reaction tank 4.
The anaerobic reaction tank 2, the anoxic reaction tank 3 and the aerobic reaction tank 4 are internally provided with an aeration system 8, the aeration system 8 comprises microporous aeration discs 86 arranged in the anaerobic reaction tank 2, the anoxic reaction tank 3 and the aerobic reaction tank 4, the aeration system 8 comprises an aeration main pipe 81, and the microporous aeration discs 86 in the anaerobic reaction tank 2, the anoxic reaction tank 3 and the aerobic reaction tank 4 are respectively communicated with the aeration main pipe 81 through aeration branch pipes. Be equipped with anaerobic aeration pipe valve 83 on the aeration branch pipe in the anaerobic reaction pond 2, be equipped with oxygen deficiency aeration pipe valve 84 on the aeration branch pipe in the oxygen deficiency reaction pond 3, be equipped with good oxygen aeration pipe valve 85 on the aeration branch pipe in the good oxygen reaction pond 4, aeration main pipe 81 even has fan cabinet 5, in addition, be connected with condensate water pipeline 87 on the aeration pipeline in oxygen deficiency reaction pond 3, the good oxygen reaction pond 4, be equipped with condensate water pipeline valve on the condensate water pipeline 87.
An elastic filler 9 is used in the aerobic reaction tank 4.
Be equipped with in box 1 and nitrify liquid reflux system 10, nitrify liquid reflux system 10 including the backwash pump 101 that is located aerobic reaction pond, backwash pump 101 passes through backflow pipeline and oxygen deficiency reaction pond 3 intercommunication, is equipped with flowmeter 103 on the backflow pipeline, and one section that is close to backwash pump 101 on the backflow pipeline is equipped with the backward flow branch pipe with aerobic reaction pond 4 intercommunication, is equipped with flow control valve 102 on the backward flow branch pipe.
When the device is used, sewage firstly intercepts and removes fine impurities in the sewage through the strand-turning fine grating 6, the lower part of the strand-turning fine grating 6 is connected with the anaerobic reaction tank 2 through a pipeline, the sewage flows through the anaerobic reaction tank 2, under the action of the submersible stirrer 7, the sewage is contacted with active sludge components and is mainly used for releasing phosphorus-containing sludge from the secondary sedimentation tank to increase the concentration of phosphorus in the sewage, soluble organic matters are absorbed by microorganisms to reduce the BOD concentration of the sewage, the anoxic reaction tank 3 is connected with the anaerobic reaction tank 2 through the intermediate partition plate, the sewage flows through the anoxic reaction tank 3 from a water through hole in the upper part of the anaerobic reaction tank 2, under the action of the submersible stirrer 7, the sewage is contacted with the active sludge components and is mainly used for denitrifying bacteria to utilize the organic matters in the sewage as a carbon source and to nitrify NO in a mixed solution 3 -N and NO 2 Reduction of-N to N 2 Releasing, the anoxic reaction tank 3 is connected with the aerobic reaction tank 4 through an intermediate partition plate, sewage flows through the aerobic reaction tank 4 from a limber hole at the bottom of the anoxic reaction tank 3, oxygen is filled into the water through a micropore aeration disc 86 at the bottom of the aerobic reaction tank 4, so that the activated sludge, the sewage and the suspended elastic filler 9 in the aerobic reaction tank are fully contacted, after the suspended elastic filler 9, the sludge and the sewage are contacted for a long time, a layer of biomembrane is hung on the surface of the elastic filler 9, the biological membrane is mainly used for degrading organic matters, organic nitrogen is aminated and then nitrified, and NH is enabled to be nitrified 3 the-N concentration decreased significantly. The tail end of the aerobic reaction tank is provided with two nitrifying liquid reflux pumps 101, and the aerobic reaction tank 4 mainly contains NO 3 -N and NO 2 The sewage of the-N flows back to the anoxic reaction tank 3 for denitrification reaction, and NO in the nitrified mixed liquid is treated 3 -N and NO 2 Reduction of-N to N 2 And (3) releasing, wherein the flow of the return flow of the nitrified liquid is regulated by a return flow pipeline flowmeter 103 and a return flow pipeline flow regulating valve 102, and two fans are arranged in a fan cabinet 5 connected with the tail end of the aerobic tank and used for oxygenating the sewage by an aeration main pipe 81, an aeration branch pipe 82, an anaerobic aeration pipe valve 83, an anoxic aeration pipe valve 84, an aerobic aeration pipe valve 85 and a microporous aeration disc 86. The tail end of the aerobic tank is close to the top of the aerobic tank to form an effluent weir 11 for the integrated device to discharge water so thatIt flows through the next processing unit.
When the sewage to be treated is COD cr And when the TN and TP concentrations are higher, the traditional AAO denitrification and dephosphorization process is adopted. The sewage sequentially enters a strand-turning fine grid 6, an anaerobic reaction tank 2, an anoxic reaction tank 3 and an aerobic reaction tank 4 to a water outlet weir 11, an anaerobic aeration pipe valve 83 is closed firstly, so that the dissolved oxygen in the anaerobic reaction tank 2 is controlled below 0.5mg/L, the anoxic aeration pipe valve 84 is slightly opened a little, so that the dissolved oxygen in the anoxic reaction tank 3 is controlled to be about 0.5-1 mg/L, an aerobic aeration pipe valve 85 is opened, so that the dissolved oxygen in the aerobic reaction tank 4 is controlled to be about 2-3 mg/L, a nitrification liquid reflux pump 101 arranged at the tail end of the aerobic tank is opened, and the nitrification liquid reflux to the anoxic reaction tank 3 is enabled to flow 2 times of the inflow rate by controlling a reflux pipeline flow regulating valve 102 and observing a flow meter 103.
When the sewage to be treated is COD cr When TN concentration is higher and TP concentration is lower to meet the effluent requirement, the original AAO process is changed into A N In the O process, the valve 83 of the original anaerobic aeration pipe is slightly opened, so that the dissolved oxygen in the anaerobic reaction tank 2 is controlled to be about 0.5-1 mg/L, and other operations are the same as those in the AAO process. At the moment, the original anaerobic reaction tank 2 is changed into an anoxic reaction tank, the tank capacity of the original anoxic reaction tank 3 is increased, and the retention time of sewage in the anoxic reaction tank is increased, so that the sewage treatment efficiency is improved.
When the sewage to be treated is COD cr 、NH 3 When the concentration of N is higher, and the concentrations of TP and TN are lower to meet the water outlet requirement or the TN index is not checked, the original AAO process is changed into the traditional activated sludge method, the anaerobic aeration pipe valve 83, the anoxic aeration pipe valve 84 and the aerobic aeration pipe valve 85 are all opened, the gradually decreasing aeration mode is adopted to control the dissolved oxygen in the anaerobic reaction tank 2 to be about 3mg/L, the dissolved oxygen in the anoxic reaction tank 3 to be about 2.5mg/L, the dissolved oxygen in the aerobic reaction tank 4 to be about 2mg/L, and simultaneously the nitrified liquid reflux pump at the tail end of the aerobic reaction tank 4 is closed, so that the original anaerobic reaction tank 2 and the anoxic reaction tank 3 are equivalently changed into the aerobic reaction tank, the tank capacity of the original aerobic reaction tank 4 is increased, and the retention time of sewage in the aerobic reaction tank is increased,removal of COD cr Simultaneously reacting NH 3 Conversion of-N to NO 3 -N and NO 2 -N, reduction of NH in wastewater 3 The concentration of N, thereby improving the sewage treatment efficiency.
In summary, the integrated sewage treatment apparatus of the embodiment can change all the original anaerobic reaction tank and the original anoxic reaction tank into the anoxic reaction tank or all the original anaerobic reaction tank and the original anoxic reaction tank into the aerobic reaction tank by adjusting the aeration amounts of the anaerobic reaction tank, the anoxic reaction tank and the aerobic reaction tank according to the components of the sewage, so as to change the corresponding processes, increase the volumes of the corresponding reaction tanks, further increase the residence time of the sewage in each reaction tank, and finally achieve the purpose of removing pollutants in the sewage.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The integrated sewage treatment device is characterized by comprising a box body (1), wherein an anaerobic reaction tank (2), an anoxic reaction tank (3) and an aerobic reaction tank (4) are sequentially arranged in the box body (1), and aeration systems (8) are arranged in the anaerobic reaction tank (2), the anoxic reaction tank (3) and the aerobic reaction tank (4);
an elastic filler (9) is used in the aerobic reaction tank (4);
be equipped with in box (1) and nitrify liquid reflux system (10), nitrify liquid reflux system (10) including being located backwash pump (101) in the aerobic reaction pond, backwash pump (101) through backflow pipeline with oxygen deficiency reaction pond (3) intercommunication.
2. The integrated sewage treatment device according to claim 1, wherein the inlet end of the anaerobic reaction tank (2) uses a fine twisted grid (6).
3. The integrated sewage treatment device according to claim 1, wherein a submersible mixer (7) is arranged in each of the anaerobic reaction tank (2) and the anoxic reaction tank (3).
4. An integrated sewage treatment plant according to claim 3, characterised in that said submersible mixer (7) comprises two mixing devices working alternately.
5. The integrated sewage treatment device according to claim 1, wherein partition plates are arranged between the anaerobic reaction tank (2) and the anoxic reaction tank (3) and between the anoxic reaction tank (3) and the aerobic reaction tank (4), a water through hole is arranged at the top of the partition plate between the anaerobic reaction tank (2) and the anoxic reaction tank (3), and a water through hole is arranged at the bottom of the partition plate between the anoxic reaction tank (3) and the aerobic reaction tank (4).
6. The integrated sewage treatment device according to claim 1, wherein the aeration system (8) comprises microporous aeration discs (86) arranged in the anaerobic reaction tank (2), the anoxic reaction tank (3) and the aerobic reaction tank (4), the aeration system (8) comprises an aeration main pipe (81), and the microporous aeration discs (86) in the anaerobic reaction tank (2), the anoxic reaction tank (3) and the aerobic reaction tank (4) are respectively communicated with the aeration main pipe (81) through aeration branch pipes.
7. The integrated sewage treatment device according to claim 6, wherein an anaerobic aeration pipe valve (83) is arranged on an aeration branch pipe in the anaerobic reaction tank (2), an anoxic aeration pipe valve (84) is arranged on an aeration branch pipe in the anoxic reaction tank (3), an aerobic aeration pipe valve (85) is arranged on an aeration branch pipe in the aerobic reaction tank (4), and the aeration main pipe (81) is connected with the air cabinet (5).
8. The integrated sewage treatment plant according to claim 1, wherein the aeration pipelines in the anoxic reaction tank (3) and the aerobic reaction tank (4) are connected with a condensed water pipeline (87), and the condensed water pipeline (87) is provided with a condensed water pipeline valve.
9. The integrated sewage treatment device according to claim 1, wherein a flow meter (103) is arranged on the return pipeline, a section of the return pipeline close to the return pump (101) is provided with a return branch communicated with the aerobic reaction tank (4), and the return branch is provided with a flow regulating valve (102).
10. The integrated sewage treatment device according to claim 1, wherein the aerobic reaction tank (4) is provided with a water outlet weir (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220711474.7U CN217173393U (en) | 2022-03-29 | 2022-03-29 | Integrated sewage treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220711474.7U CN217173393U (en) | 2022-03-29 | 2022-03-29 | Integrated sewage treatment device |
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| Publication Number | Publication Date |
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| CN217173393U true CN217173393U (en) | 2022-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220711474.7U Active CN217173393U (en) | 2022-03-29 | 2022-03-29 | Integrated sewage treatment device |
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| CN (1) | CN217173393U (en) |
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