CN213037623U - MBR (membrane bioreactor) integrated treatment device for domestic sewage - Google Patents
MBR (membrane bioreactor) integrated treatment device for domestic sewage Download PDFInfo
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- CN213037623U CN213037623U CN202021409215.6U CN202021409215U CN213037623U CN 213037623 U CN213037623 U CN 213037623U CN 202021409215 U CN202021409215 U CN 202021409215U CN 213037623 U CN213037623 U CN 213037623U
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Abstract
The utility model discloses a domestic sewage MBR integrated treatment device, which comprises a box body, wherein the box body is isolated into a regulating tank, an anoxic tank, an aerobic tank, an MBR membrane tank and an equipment bin along the flowing direction of the domestic sewage; the regulating tank is used for regulating the water quality and the water quantity of the incoming domestic sewage, and the domestic sewage discharged by the regulating tank enters the anoxic tank; the anoxic tank is used for decomposing and denitrifying organic matters in the incoming domestic sewage, and the domestic sewage discharged from the anoxic tank enters the aerobic tank; the aerobic tank is used for decomposing and nitrifying organic matters in the entering domestic sewage, and the domestic sewage in the aerobic tank enters the MBR membrane tank; an MBR membrane module is arranged in the MBR membrane tank; and a water drainage tank is arranged in the equipment bin, water filtered by the MBR membrane assembly enters the water drainage tank, and the water in the water drainage tank is discharged outwards. The MBR integrated treatment device for the domestic sewage has the advantages of high integration level and easiness in installation.
Description
Technical Field
The utility model relates to a sewage treatment device technical field especially relates to a domestic sewage MBR integration treatment device.
Background
Rural domestic sewage is from waste water discharged from living facilities such as toilets, kitchens, shower rooms and the like, and is reflected in water quality indexes, namely, the biochemical oxygen demand (BOD5), the Chemical Oxygen Demand (COD), the suspended matter (SS) content, the nitrogen and phosphorus content and eutrophication, because the rural domestic sewage contains substances such as silt, grease, soap lye, food scraps, sundries, germs and the like. If the sewage is not treated, the sewage is directly discharged into water bodies (rivers, lakes, seas and underground water) and soil, so that the concentration of organic matters in the water bodies and the soil is too high, and the water bodies and the soil are eutrophicated. Rural domestic sewage has the characteristics of large total amount, wide distribution and difficult concentration, and the research and design of the water treatment integrated equipment with high integration level and easy installation is of great significance aiming at the characteristics of rural domestic sewage.
Disclosure of Invention
The utility model provides a solve a domestic sewage MBR integration treatment device of above-mentioned problem, this domestic sewage MBR integration treatment device have the advantage that the integrated level is high and easy to install, are particularly useful for handling rural domestic sewage.
The utility model discloses a following technical scheme realizes:
an MBR (membrane bioreactor) integrated treatment device for domestic sewage comprises a box body, wherein the box body is isolated into an adjusting tank, an anoxic tank, an aerobic tank, an MBR (membrane bioreactor) membrane tank and an equipment bin along the flowing direction of the domestic sewage;
the regulating tank is used for regulating the water quality and the water quantity of the incoming domestic sewage, and the domestic sewage discharged by the regulating tank enters the anoxic tank;
the anoxic tank is used for decomposing and denitrifying organic matters in the incoming domestic sewage, and the domestic sewage discharged from the anoxic tank enters the aerobic tank;
the aerobic tank is used for decomposing and nitrifying organic matters in the entering domestic sewage, and the domestic sewage in the aerobic tank enters the MBR membrane tank;
an MBR membrane module is arranged in the MBR membrane tank and is used for filtering the entering domestic sewage;
and a water drainage tank is arranged in the equipment bin, water filtered by the MBR membrane assembly enters the water drainage tank, and the water in the water drainage tank is discharged outwards.
Preferably, the bottom of the adjusting tank and the bottom of the aerobic tank are respectively provided with a microporous aeration disc, the MBR membrane module is provided with an aeration pipe, the equipment bin is also provided with an air blower, and the air blower is respectively connected with the microporous aeration disc in the adjusting tank and the aerobic tank and the aeration pipe of the MBR membrane module through pipelines to supply air.
Preferably, an ultraviolet disinfection tube is further arranged in the equipment bin, and the ultraviolet disinfection tube is used for performing ultraviolet disinfection on the water filtered by the MBR membrane module before entering the drainage tank.
Preferably, a dosing device is further arranged in the equipment bin and used for collecting the medicament and the water from the drainage tank to be sent to the MBR membrane module so as to carry out chemical cleaning on the MBR membrane module.
Preferably, the dosing device is a sodium hypochlorite dosing device.
Preferably, a backwashing pump is further arranged in the equipment bin and used for sending water into the MBR membrane modules so as to clean the MBR membrane modules.
Preferably, two reflux pumps are further arranged in the MBR membrane pool, one reflux pump is used for refluxing a part of sludge in the MBR membrane pool to the anoxic pool and the aerobic pool, and the other reflux pump is used for discharging residual sludge in the MBR membrane pool out of the MBR membrane pool.
Preferably, be provided with a plurality of elevator pumps and a plurality of pipeline in the equalizing basin, every the elevator pump is connected a pipeline respectively, a plurality of elevator pumps are used for with sewage in the equalizing basin is discharged into after gathering through the pipeline of connection the oxygen deficiency pond, every be provided with check valve and gate valve on the pipeline, the check valve is used for preventing domestic sewage in the pipeline is against the current, the gate valve is used for closing through manual mode the pipeline.
Preferably, a first grid and a second grid are arranged in the adjusting tank, domestic sewage sequentially passes through the first grid and the second grid for filtration and then enters the adjusting tank, and the grid gaps of the first grid are larger than those of the second grid.
Preferably, overflow holes are formed between the anoxic tank and the aerobic tank and between the aerobic tank and the MBR membrane tank, and domestic sewage overflows from the anoxic tank to the aerobic tank and overflows to the MBR membrane tank after passing through the aerobic tank.
Compared with the prior art, the beneficial effects of the utility model include at least:
the utility model discloses an among the domestic sewage MBR integration processing apparatus, through with equalizing basin, oxygen deficiency pond, good oxygen pond, MBR membrane cisterna and equipment storehouse integration in a box, improved domestic sewage MBR integration processing apparatus's integrated level, above-mentioned domestic sewage MBR integration processing apparatus has practiced thrift investment cost, has reduced area, has reduced the energy consumption, and can keep high activated sludge concentration, has improved biological treatment organic load. The utility model discloses a domestic sewage MBR integration treatment device can be formed by the steel sheet system of welding, can carry out mass production in the mill to shorten construction period, during the installation, only need with domestic sewage MBR integration treatment device hang pack into the pit can, accomplish the installation after fixed promptly, installation simple accurate need not to transfer large-scale manpower and materials, the integrated level is higher, can bury the installation, but normal afforestation above the ground is particularly useful for handling rural domestic sewage. The operation stage can be started after the equipment is buried, the construction period is greatly shortened, no leakage exists, the tightness is good, the economic index is low, and the device is durable.
Drawings
Fig. 1 is a schematic structural diagram of the MBR integrated treatment device for domestic sewage in the embodiment of the utility model.
Fig. 2 is a schematic diagram of the MBR integrated treatment device for domestic sewage in the embodiment of the utility model.
In the figure, 10, a regulating reservoir; 11. a lift pump; 12. a non-return valve; 13. a gate valve; 14. a microporous aeration disc; 20. an anoxic tank; 30. an aerobic tank; 40. an MBR membrane tank; 41. an MBR membrane module; 42. an aeration pipe; 43. a reflux pump; 50. an equipment bin; 51. a drain tank; 52. a blower; 53. an ultraviolet disinfection tube; 54. a dosing device; 55. and (4) backwashing the pump.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
The words for expressing the position and direction described in the present invention are all the explanations given by taking the drawings as examples, but can be changed according to the needs, and the changes are all included in the protection scope of the present invention.
Referring to fig. 1 and 2, the embodiment of the utility model provides a domestic sewage MBR integrated treatment device, this domestic sewage MBR integrated treatment device include the box, along domestic sewage flow direction, are kept apart in the box and are equalizing basin 10, oxygen deficiency pond 20, good oxygen pond 30, MBR membrane cisterna 40 and equipment storehouse 50.
The adjusting tank 10 is used for adjusting the quality and quantity of the entering domestic sewage, and the domestic sewage discharged by the adjusting tank 10 enters the anoxic tank 20.
The utility model discloses in some embodiments, be provided with first grid and second grid (not shown) in the equalizing basin 10, domestic sewage gets into the equalizing basin 10 after first in proper order filters through first grid and second grid, the net clearance of first grid is greater than the net clearance of second grid, first grid intercepts large granule and large-size floater and dregs earlier, then intercept floater and dregs of tiny size and tiny size earlier by the second grid again, through setting up first grid and second grid, prevent mechanical equipment such as water pump and pipeline from being worn and torn or blockked up, make the follow-up treatment flow go on smoothly.
The utility model discloses in some embodiments, be provided with a plurality of elevator pumps 11 and a plurality of pipeline in the equalizing basin 10, a pipeline is connected respectively to every elevator pump 11, and a plurality of elevator pumps 11 are used for gathering back row oxygen deficiency pond 20 with the pipeline of connecting with the sewage in the equalizing basin 10, are provided with check valve 12 and gate valve 13 on every pipeline, and check valve 12 is used for preventing the domestic sewage adverse current in the pipeline, and gate valve 13 is used for closing the pipeline through manual mode. When one of the lift pumps 11 fails due to a fault or cannot operate due to shutdown, sewage of other lift pumps 11 can flow back to the regulating tank 10 from the pipeline of the shutdown lift pump 11, and by arranging the check valve 12, when the lift pump 11 cannot operate, the sewage of other lift pumps 11 is prevented from flowing back to the regulating tank 10 from the pipeline of the shutdown lift pump 11, so that a protection effect is achieved, and the lift pump 11 and the pipeline are prevented from being scrapped. When one of the lift pumps 11 fails due to a fault or is stopped to cause incapability of running, the sewage of the other lift pumps 11 can flow back to the regulating tank 10 from the pipeline of the stopped lift pump 11, when the sewage contains solid impurities, the check valve 12 can possibly have the condition that the check function cannot be realized due to the blocking of the solid impurities, through the arrangement of the gate valve 13, when the lift pump 11 cannot run, the pipeline is closed by the gate valve 13 in a manual mode, the sewage of the other lift pumps 11 can be prevented from flowing back to the regulating tank 10 from the pipeline of the stopped lift pump 11, the secondary protection effect is realized, and the lift pump 11 and the pipeline are prevented from being scrapped.
The anoxic tank 20 is used for decomposing and denitrifying organic matters in the incoming domestic sewage, and the domestic sewage discharged from the anoxic tank 20 enters the aerobic tank 30. Heterotrophic bacteria in the anoxic tank 20 hydrolyze suspended contaminants such as starch, fiber, carbohydrate, etc. and soluble organic substances in the domestic wastewater into organic acids, so that macromolecular organic substances are decomposed into small molecular organic substances, insoluble organic substances are converted into soluble organic substances, and ammonia (NH) is liberated from contaminants such as protein, fat, etc. (N in the organic chain or amino groups in amino acids) by ammoniation3、NH4When these are hydrolyzed by oxygen deficiencyWhen the product enters the aerobic tank 3030 for aerobic treatment, the biodegradability of the domestic sewage and the utilization efficiency of oxygen can be improved. Under anoxic conditions, the denitrification of the heterotrophic bacteria converts NO3Reduction to molecular nitrogen (N)2) And C, N, O, the ecological cycle is completed, and the harmless treatment of the domestic sewage is realized.
The aerobic tank 30 is used for decomposing and nitrifying organic matters in the entering domestic sewage, and the domestic sewage in the aerobic tank 30 enters the MBR membrane tank 40. The aerobic microorganisms in the aerobic tank 30 decompose the organic matter into CO2And H2O。
The MBR membrane tank 40 is provided with an MBR membrane module 41, and the MBR membrane module 41 is used for filtering the entering domestic sewage. MBR membrane module 41 includes MBR membrane frame and membrane frame box, is provided with a plurality of membrane elements on the membrane frame box, and a plurality of membrane elements set up at the interval side by side, and the membrane element can be the curtain-type membrane, and membrane frame box is installed on MBR membrane frame, and MBR membrane module 41 can also include aeration subassembly and water production subassembly, and aeration subassembly and water production subassembly can be installed on MBR membrane frame, and aeration subassembly and water production subassembly's concrete structure can adopt prior art, does not give unnecessary details here.
The equipment bin 50 is provided with a water drainage tank 51, water filtered by the MBR membrane module 41 enters the water drainage tank 51, and the water in the water drainage tank 51 is discharged outwards.
Through integrating equalizing basin 10, oxygen deficiency pond 20, good oxygen pond 30, MBR membrane cisterna 40 and equipment storehouse 50 in a box, improved domestic sewage MBR integrated processing apparatus's integrated level, above-mentioned domestic sewage MBR integrated processing apparatus has practiced thrift investment cost, has reduced area, has reduced the energy consumption, and can keep high activated sludge concentration, has improved biological treatment organic load. The utility model discloses a domestic sewage MBR integration treatment device can be formed by the steel sheet system of welding, can carry out mass production in the mill to shorten construction period, during the installation, only need with domestic sewage MBR integration treatment device hang pack into the pit can, accomplish the installation after fixed promptly, installation simple accurate need not to transfer large-scale manpower and materials, the integrated level is higher, can bury the installation, but normal afforestation above the ground is particularly useful for handling rural domestic sewage. The operation stage can be started after the equipment is buried, the construction period is greatly shortened, no leakage exists, the tightness is good, the economic index is low, and the device is durable.
In some embodiments of the present invention, the bottom of the adjusting tank 10 and the bottom of the aerobic tank 30 are respectively provided with a microporous aeration disc 14, the MBR membrane module 41 is provided with an aeration pipe 42, the equipment bin 50 is further provided with an air blower 52, the number of the air blowers 52 can be set as required, and can be one or more, and the air blower 52 is respectively connected with the microporous aeration disc 14 in the adjusting tank 10 and the aerobic tank 30 and the aeration pipe 42 of the MBR membrane module 41 through pipelines to supply gas. Oxygen is supplied to the domestic sewage in the adjusting tank 10 through the microporous aeration disc 14 of the adjusting tank 10, so that the aim of pre-aeration can be achieved, and aerobic microbial degradation is performed; oxygen is supplied to the domestic sewage in the aerobic tank 30 through the microporous aeration disc 14 of the aerobic tank 30, so that dissolved oxygen in the domestic sewage is increased, the domestic sewage has conditions suitable for growth and propagation of aerobic microorganisms, and the degradation effect is improved; the aeration pipe 42 of the MBR membrane module 41 supplies oxygen to the domestic sewage in the MBR membrane tank 40, so that sufficient dissolved oxygen can be provided, the aeration pipe 42 can increase the disturbance of water flow, and the surface of the MBR membrane is not easily blocked by sewage.
The utility model discloses in some embodiments, still be provided with ultraviolet disinfection pipe 53 in equipment storehouse 50, ultraviolet disinfection pipe 53 is arranged in carrying out ultraviolet disinfection to the water after MBR membrane module 41 filters before getting into drainage box 51, can set up the ultraviolet disinfection lamp in the ultraviolet disinfection pipe 53, and the ultraviolet disinfection lamp can set up on flowing to the pipeline between drainage box 51 from MBR membrane module 41, and the ultraviolet disinfection lamp carries out ultraviolet disinfection to the water of circulation pipeline.
The utility model discloses in some embodiments, still be provided with charge device 54 in equipment storehouse 50, charge device 54 is preferably sodium hypochlorite charge device, and charge device 54 is used for compiling medicament and the water that comes from drain box 51 and send into MBR membrane module 41 to carry out chemical cleaning to MBR membrane module 41. Specifically, a pipeline for discharging the chemical liquid is connected to the chemical dosing device 54, a pipeline for discharging a part of the water in the drain tank 51 is connected to the drain tank 51, and a pipeline connected to the chemical dosing device 54 is connected to a pipeline connected to the drain tank 51, so that when the MBR membrane module 41 needs to be chemically cleaned, the chemical liquid discharged from the chemical dosing device 54 and a part of the water discharged from the drain tank 51 are collected and flow to the MBR membrane module 41, and the membrane element on the MBR membrane module 41 is chemically cleaned.
In some embodiments of the present invention, a backwash pump 55 is further disposed in the equipment compartment 50, and the backwash pump 55 is used for sending clean water into the MBR membrane module 41 to clean the MBR membrane module 41. By providing the backwash pump 55, the membrane elements of the MBR membrane module 41 are backwashed after being used for a long time, thereby further ensuring the service life of the membrane elements of the MBR membrane module 41.
The utility model discloses some embodiments still are provided with two backwash pumps 43 in the MBR membrane cisterna 40, and a backwash pump 43 is arranged in with the partly mud backward flow in the MBR membrane cisterna 40 to oxygen deficiency pond 20 and good oxygen pond 30, and another backwash pump 43 is used for the surplus sludge discharge MBR membrane cisterna 40 in the MBR membrane cisterna 40, and surplus sludge pump is outward transported to the septic tank is regular.
The utility model discloses some embodiments are provided with overflow hole (not shown) between oxygen deficiency pond 20 and the good oxygen pond 30, between good oxygen pond 30 and the MBR membrane cisterna 40, and the overflow hole can set up the top of baffle between oxygen deficiency pond 20 and good oxygen pond 30, the top of baffle between good oxygen pond 30 and the MBR membrane cisterna 40, and domestic sewage overflows to good oxygen pond 30 from oxygen deficiency pond 20 to overflow to MBR membrane cisterna 40 behind good oxygen pond 30.
The utility model discloses a domestic sewage MBR integration treatment device's a concrete processing procedure includes, domestic sewage at first flows into equalizing basin 10, is prevented to get into follow-up processing pond, protective apparatus normal operating by the suspended material interception of first grid and second grid in with sewage at equalizing basin 10 entry. Domestic sewage automatically flows into the adjusting tank 10, the adjusting tank 10 has the function of adjusting water quality and water quantity, two lifting pumps 11 are arranged in the adjusting tank 10, and the starting and stopping of the lifting pumps 11 are automatically controlled by an automatic liquid level controller.
After even quality of water in equalizing basin 10, promote sewage to oxygen deficiency pond 20 by elevator pump 11, handle, flow through good oxygen pond 30, MBR membrane cisterna 40 in proper order through the overflow mode afterwards, carry out good oxygen processing and MBR biomembrane and filter, finally connect the tail end through MBR membrane cisterna 40 and go out the water pump and inhale to water drainage tank 51 after handling sewage, discharge up to standard after ultraviolet disinfection. The blower 52 is used for aerating the adjusting tank 10, the aerobic tank 30 and the MBR membrane tank 40 to different degrees, so that the oxygen content is suitable for the growth of microorganisms in the section. The return pump 43 returns a part of sludge in the MBR membrane tank 40 to the anoxic tank 20 and the aerobic tank 30, and pumps a part of sludge to the septic tank for periodic outward transportation.
Through the utility model discloses a go out water each item index behind domestic sewage MBR integration processing apparatus is less than one-level A standard among "town sewage treatment plant pollutant discharge standard" (GB18918-2002), and wherein the effect reaches surface water II class standard after the ammonia nitrogen is handled, has reached the sewage treatment requirement, and sewage can directly discharge after handling. The whole process is controlled by the electric control system on line in the whole process, and the sludge generated by the biochemical system can be extracted and treated uniformly by the environmental sanitation department at regular intervals.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the spirit and scope of the present invention, and all such changes are intended to be within the scope of the following claims.
Claims (10)
1. The MBR integrated treatment device for the domestic sewage is characterized by comprising a box body, wherein the box body is isolated into a regulating tank, an anoxic tank, an aerobic tank, an MBR membrane tank and an equipment bin along the flowing direction of the domestic sewage;
the regulating tank is used for regulating the water quality and the water quantity of the incoming domestic sewage, and the domestic sewage discharged by the regulating tank enters the anoxic tank;
the anoxic tank is used for decomposing and denitrifying organic matters in the incoming domestic sewage, and the domestic sewage discharged from the anoxic tank enters the aerobic tank;
the aerobic tank is used for decomposing and nitrifying organic matters in the entering domestic sewage, and the domestic sewage in the aerobic tank enters the MBR membrane tank;
an MBR membrane module is arranged in the MBR membrane tank and is used for filtering the entering domestic sewage;
and a water drainage tank is arranged in the equipment bin, water filtered by the MBR membrane assembly enters the water drainage tank, and the water in the water drainage tank is discharged outwards.
2. The MBR integrated treatment device for domestic sewage according to claim 1, wherein the bottom of the adjusting tank and the bottom of the aerobic tank are respectively provided with a microporous aeration disc, the MBR membrane module is provided with an aeration pipe, and the equipment bin is further provided with a blower which is respectively connected with the microporous aeration disc in the adjusting tank and the aerobic tank and the aeration pipe of the MBR membrane module through pipelines to supply gas.
3. The MBR integrated treatment device for the domestic sewage according to claim 1, wherein an ultraviolet disinfection tube is further arranged in the equipment bin and is used for performing ultraviolet disinfection on the water filtered by the MBR membrane module before entering the drainage tank.
4. The MBR integrated treatment device for the domestic sewage according to claim 1, wherein a dosing device is further arranged in the equipment bin and is used for collecting a medicament and water from the drainage tank to be fed into the MBR membrane modules so as to chemically clean the MBR membrane modules.
5. The MBR integrated treatment device for domestic sewage according to claim 4, wherein the dosing device is a sodium hypochlorite dosing device.
6. The MBR integrated treatment device for the domestic sewage according to claim 4, wherein a backwashing pump is further arranged in the equipment bin and used for feeding water into the MBR membrane modules so as to clean the MBR membrane modules.
7. The MBR integrated treatment device for the domestic sewage according to claim 1, wherein two reflux pumps are further arranged in the MBR membrane tank, one reflux pump is used for refluxing a part of sludge in the MBR membrane tank to the anoxic tank and the aerobic tank, and the other reflux pump is used for discharging residual sludge in the MBR membrane tank out of the MBR membrane tank.
8. The MBR integrated treatment device for domestic sewage according to claim 1, wherein a plurality of lift pumps and a plurality of pipelines are arranged in the regulating tank, each lift pump is connected with one pipeline, the plurality of lift pumps are used for collecting the sewage in the regulating tank through the connected pipelines and then discharging the collected sewage into the anoxic tank, each pipeline is provided with a check valve and a gate valve, the check valve is used for preventing the domestic sewage in the pipeline from flowing backwards, and the gate valve is used for manually closing the pipeline.
9. The MBR integrated treatment device for domestic sewage according to claim 1, wherein a first grating and a second grating are arranged in the adjusting tank, the domestic sewage is filtered by the first grating and the second grating in sequence and then enters the adjusting tank, and the grid clearance of the first grating is larger than that of the second grating.
10. The MBR integrated treatment device for domestic sewage according to claim 1, wherein overflow holes are arranged between the anoxic tank and the aerobic tank and between the aerobic tank and the MBR membrane tank, and domestic sewage overflows from the anoxic tank to the aerobic tank, passes through the aerobic tank and then overflows to the MBR membrane tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021409215.6U CN213037623U (en) | 2020-07-16 | 2020-07-16 | MBR (membrane bioreactor) integrated treatment device for domestic sewage |
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| CN202021409215.6U CN213037623U (en) | 2020-07-16 | 2020-07-16 | MBR (membrane bioreactor) integrated treatment device for domestic sewage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113620515A (en) * | 2021-08-02 | 2021-11-09 | 上海泓济环保科技股份有限公司 | Kitchen garbage collection vehicle washes effluent treatment, recovery unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113620515A (en) * | 2021-08-02 | 2021-11-09 | 上海泓济环保科技股份有限公司 | Kitchen garbage collection vehicle washes effluent treatment, recovery unit |
| CN113620515B (en) * | 2021-08-02 | 2022-04-12 | 上海泓济环保科技股份有限公司 | Kitchen garbage collection vehicle washes effluent treatment, recovery unit |
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