CN115321748B - Jet circulation type membrane bioreactor based on gas lift effect - Google Patents
Jet circulation type membrane bioreactor based on gas lift effect Download PDFInfo
- Publication number
- CN115321748B CN115321748B CN202210848845.0A CN202210848845A CN115321748B CN 115321748 B CN115321748 B CN 115321748B CN 202210848845 A CN202210848845 A CN 202210848845A CN 115321748 B CN115321748 B CN 115321748B
- Authority
- CN
- China
- Prior art keywords
- membrane
- bioreactor
- flow
- anaerobic bioreactor
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 108
- 230000000694 effects Effects 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 93
- 238000005273 aeration Methods 0.000 claims abstract description 44
- 238000004062 sedimentation Methods 0.000 claims abstract description 39
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000011010 flushing procedure Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000005374 membrane filtration Methods 0.000 claims description 27
- 230000007227 biological adhesion Effects 0.000 claims description 20
- 239000010802 sludge Substances 0.000 claims description 20
- 238000001914 filtration Methods 0.000 claims description 19
- 239000007921 spray Substances 0.000 claims description 19
- 230000002572 peristaltic effect Effects 0.000 claims description 15
- 238000009833 condensation Methods 0.000 claims description 14
- 230000005494 condensation Effects 0.000 claims description 14
- 239000000969 carrier Substances 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 10
- 239000012466 permeate Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 239000000945 filler Substances 0.000 abstract description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 68
- 239000010865 sewage Substances 0.000 description 10
- 239000000227 bioadhesive Substances 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 5
- 238000006731 degradation reaction Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003204 osmotic effect Effects 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 2
- 238000010170 biological method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000012958 reprocessing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 241000533950 Leucojum Species 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000005660 hydrophilic surface Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011197 physicochemical method Methods 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000003307 slaughter Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
-
- 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
Abstract
The application relates to the technical field of wastewater treatment, and provides a jet circulation type membrane bioreactor based on a gas lift effect. The wastewater enters a sedimentation tank, the effluent enters a downflow anaerobic bioreactor, and flows circularly from bottom to top in the reactor, and the effluent enters an upflow membrane filter device. The up-flow membrane filter device comprises a permeable membrane component and an aeration cavity, and is connected with the permeable tank to receive treated effluent. The generated methane gas is condensed and then connected with the upper end of the down-flow anaerobic bioreactor through a flushing gas compressor and a gas lift compressor, so that back flushing and device gas lift circulation are realized. The application efficiently utilizes methane gas generated in the treatment process to realize the power cycle of the device, is beneficial to reducing the operation energy consumption, and the carrier filler is beneficial to improving the membrane hanging efficiency, and improves the water speed, the water flow disturbance and the back flushing efficiency through the aeration cavity arrangement, thereby slowing down the pollution in the membrane and effectively improving the water quality.
Description
Technical Field
The application relates to the technical field of wastewater treatment, in particular to a jet circulation type membrane bioreactor based on a gas lift effect.
Background
At present, the sewage treatment process can be generally divided into two main types: physicochemical and biological processes. The physicochemical method is to remove or harmless the pollutants by adding chemical reagents through physicochemical reaction, and needs to consume a large amount of manpower and material resources when the water quantity is large, has high operation cost, and is relatively suitable for toxic, harmful and difficultly biodegradable industrial wastewater. The biological method can remove pollutants in the water body by utilizing the degradation of microorganisms, and is suitable for sewage with large water quantity and large content of biochemical substances, such as slaughter industry wastewater. The existing biological methods can be divided into an activated sludge method and a biological membrane method, wherein the biological membrane method is used as a deformation of the activated sludge method, microorganisms are attached to the surface of a carrier in a membranous form, and sewage is treated by virtue of the action of microbial communities. Membrane bioreactors have further evolved on the basis of biofilm technology, and have become increasingly favored in current research.
Among the membrane bioreactors, the anaerobic membrane bioreactor is a novel water treatment technology combining anaerobic biotechnology and efficient membrane separation technology, and generally consists of two parts of an anaerobic reactor and a membrane filtration system. However, the existing anaerobic membrane bioreactor still has certain defects in operation, such as high membrane cost, easy membrane pollution generation, high operation energy consumption and the like. How to reduce the energy consumption of the reactor while reducing the membrane pollution, realize the high-efficiency recycling and low-energy operation of the membrane, and improve the treatment efficiency of the anaerobic membrane bioreactor at the same time, has great research potential.
Disclosure of Invention
The application provides a jet circulation type membrane bioreactor based on a gas lift effect, which aims to solve the problems of insufficient water circulation power, low pollutant degradation efficiency, easy membrane pollution, high operation energy consumption, large occupied space due to device separation and the like in an anaerobic membrane bioreactor used for water treatment in the prior art.
In a first aspect of the present application, there is provided a jet circulation type membrane bioreactor based on gas lift effect, comprising: the device comprises a sedimentation tank, a downflow anaerobic bioreactor, an up-flow membrane filtering device, a permeation water tank, a gas condensing tank and a sludge recovery tank, wherein the downflow anaerobic bioreactor is communicated with the upper end of the sedimentation tank, the up-flow membrane filtering device is respectively communicated with the upper end and the lower end of the downflow anaerobic bioreactor to form a loop structure, the permeation water tank is communicated with a permeation membrane component in the up-flow membrane filtering device, the gas condensing tank is communicated with the top end of the downflow anaerobic bioreactor, and the sludge recovery tank is communicated with the bottom of the sedimentation tank and the bottom of the downflow anaerobic bioreactor; the top surface of the down-flow anaerobic bioreactor is closed, and a biological adhesion carrier component is arranged in the down-flow anaerobic bioreactor; the up-flow membrane filter device also comprises an aeration cavity arranged along the periphery of the tube wall; the side wall and the bottom of the aeration cavity are provided with jet pipes, and the aeration cavity is communicated with the inside of the upflow membrane filtration device through the jet pipes; the gas condensation tank is communicated with the upper end of the permeable membrane component of the upflow membrane filtering device through a flushing gas compressor, and is communicated with the bottom end of the aeration cavity through a gas lift compressor.
Optionally, the down-flow anaerobic bioreactor is a cylindrical barrel, and the internal biological adhesion carrier component comprises a first inner pipe with a diamond biological adhesion carrier installed on the pipe wall, a second inner pipe with a first spiral adhesion carrier installed on the outer side of the pipe wall and a multi-layer biological adhesion carrier plate installed on the inner side of the pipe wall, and a second spiral adhesion carrier installed on the inner side of the outer pipe wall of the down-flow anaerobic bioreactor; the wall of the first inner pipe is a grid type permeable pipe wall, and the wall of the second inner pipe is an overflow type pipe wall which cannot be penetrated by water flow transversely; the outer pipe and the second inner pipe of the downflow anaerobic bioreactor are connected at the bottom end through a bottom annular plate; the bottom end of the first inner tube is fixedly connected to the bottom surface annular plate, the top end of the first inner tube is connected with the top surface annular plate, and the top surface annular plate surrounds the outer tube of the down-flow anaerobic bioreactor for one circle and is fixedly connected; the water outlet at the upper end of the sedimentation tank is connected with the water inlet of the downflow anaerobic bioreactor through a second peristaltic pump, and the water inlet is arranged on the side surface of the bottom of the downflow anaerobic bioreactor and is positioned above the bottom annular plate.
Optionally, the rhombic organism attaching carrier is a regular hexagon snowflake hollow structure, and each edge of the regular hexagon is provided with a rod-shaped carrier with rough surface; the multi-layer biological adhesion carrier plate is formed by splicing the rhombic biological adhesion carriers; the first spiral attaching carrier and the second spiral attaching carrier comprise cylindrical supporting carriers and spiral biological cotton carriers connected to the supporting carriers.
Optionally, the upper part of the up-flow membrane filtering device is cylindrical, the lower part of the up-flow membrane filtering device is a funnel-shaped shrinkage tube, and the lower end of the shrinkage tube is communicated with the lower end of the down-flow anaerobic bioreactor through an elbow tube.
Optionally, the jet pipe includes the horizontal jet pipe that sets up on the aeration cavity lateral wall, be in the slope jet pipe that the shrink tube inner wall of aeration cavity set up, and be in the cross air pipe that aeration cavity bottom cross section direction set up, cross air pipe and aeration cavity bottom intercommunication are equipped with the perpendicular jet pipe on the cross air pipe.
Optionally, at the corner formed by the lower end of the downflow anaerobic bioreactor and the lower end of the upflow membrane filtering device, an aeration pipe distributed along the wall of the inner arc corner is arranged, and the gas condensation tank is communicated with the aeration pipe through a flushing gas compressor.
Optionally, a grid is arranged at the upper part of the sedimentation tank, and an active carbon filter device is arranged between the sedimentation tank and the downflow anaerobic bioreactor; the front end of the sludge recycling tank in the sludge feeding direction is provided with a dehydrator, a compression water outlet of the dehydrator is connected with the top end of the sedimentation tank, and a compression residue outlet of the dehydrator is communicated with the sludge recycling tank.
Optionally, the infiltration out water pool is communicated with the downflow anaerobic bioreactor and is used for refluxing part of infiltration out water.
Optionally, the inclined jet pipe forms an angle of 30 ° with the horizontal plane.
In a second aspect of the present application, there is provided a method for water treatment using the above-described spray circulation type membrane bioreactor, comprising: the methane gas generated in the jet circulating type membrane bioreactor is used as water body flowing power in the device by the gas lift compressor, so that the water body is in a circulating flowing state, and the trapped water body in the up-flow type membrane filtering device further enters the down-flow type anaerobic bioreactor to start the next circulating treatment.
According to the jet circulation type membrane bioreactor, the downflow anaerobic bioreactor and the upflow membrane filtration device are communicated up and down to form an integrated type loop structure, methane gas generated in the process of degrading pollutants by anaerobic organisms is recovered, and the circulation flow of water in the reactor is realized by applying a gas lift principle. Through the circulation flow, the wastewater is uniformly distributed, and the organic pollutants are fully reacted and decomposed. Meanwhile, through the arrangement of the aeration cavity and the injection pipe fitting in the up-flow type membrane filtration device, the membrane filtration efficiency of the membrane assembly is enhanced by means of the injection effect of methane gas, and the membrane filtration efficiency can be controlled according to the actual running requirement by adjusting the speed of the gas lift compressor. In addition, the recovered methane gas can be backwashed by the membrane component through the flushing compressor, and the relative rest time of the suspended biomass and the membrane contact is reduced by means of circularly flowing water flow, so that the occurrence of membrane pollution is effectively reduced, and meanwhile, energy resources are saved.
Furthermore, the device is also provided with two inner pipes in the downflow anaerobic bioreactor, and forms a deep groove structure by combining the outer walls, and for the inflow water from the sedimentation tank, the inflow water overflows from the bottom to the top of the reactor in the circumferential direction in the deep groove, then merges with the inflow water from the upflow membrane filtration device, and flows downwards jointly from the middle of the reactor. The downflow anaerobic bioreactor is internally provided with a plurality of biological adhesion carriers, so that the length of a water flow circulation path is increased by combining deep groove overflow, the contact area of water flow and biological membranes on the biological adhesion carriers is increased, the space in the bioreactor is fully utilized, and the efficient purification of sewage organic matters is realized.
Drawings
In order to more clearly illustrate the technical solution of the present application, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of a jet circulating type membrane bioreactor according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a spiral attachment carrier according to an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of a screw-type attachment carrier according to an embodiment of the present application;
FIG. 4 is a schematic diagram of an upflow membrane filtration device according to an embodiment of the present application;
FIG. 5 is a schematic top view of an aeration cavity and crisscrossed aeration pipe according to an embodiment of the present application;
FIG. 6 is a schematic diagram showing a plan view of a down-flow anaerobic bioreactor and a rhombic biological attachment carrier according to an embodiment of the present application;
FIG. 7 is a graph showing the removal efficiency of COD in sewage according to the embodiment of the application.
In the figure, a 1-sedimentation tank, a 11-grid, a 12-activated carbon adsorption device, a 13-first peristaltic pump, a 14-second peristaltic pump, a 15-check valve, a 2-downflow anaerobic bioreactor, a 21-first inner tube, a 211-diamond-shaped bioadhesive carrier, a 2111-rod-shaped carrier, a 22-second inner tube, a 221-multi-layer bioadhesive carrier plate, a 222-first spiral-type attachment carrier, a 2221-cylindrical plastic support carrier, a 2222-spiral-type bio-cotton carrier, a 23-outer tube, a 231-second spiral-type attachment carrier, a 24-bottom annular plate, a 25-top annular plate, a 26-first electronic pressure sensor, a 27-pH monitor, a 28-temperature control instrument, a 3-up-flow membrane filtration device, 31-osmotic membrane module, 32-aeration cavity, 321-horizontal jet pipe, 322-inclined jet pipe, 323-crisscross ventilation pipe, 324-vertical jet pipe, 325-aeration pipe, 33-butterfly valve, 34-bidirectional peristaltic pump, 35-first electronic flowmeter, 36-second electronic pressure sensor, 37-elbow pipe, 4-permeate outlet water tank, 41-third peristaltic pump, 5-gas condensing tank, 50-gas flowmeter, 51-flushing gas compressor, 52-gas lift compressor, 53-second electronic flowmeter, 54-first valve, 55-third electronic flowmeter, 56-second valve, 57-third valve, 6-sludge recovery tank, 61-dehydrator.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will become more apparent, a more particular description of the application will be rendered by reference to the appended drawings and examples.
The embodiment of the application provides a jet circulation type membrane bioreactor based on a gas lift effect, as shown in a figure 1, the device comprises a sedimentation tank 1, a downflow anaerobic bioreactor 2 communicated with the upper end of the sedimentation tank 1, an up-flow membrane filtering device 3 which is respectively communicated with the up-flow anaerobic bioreactor 2 to form a loop structure, a permeable water tank 4 communicated with a permeable membrane component 31 in the up-flow membrane filtering device, a gas condensation tank 5 communicated with the top end of the downflow anaerobic bioreactor 2, and a sludge recovery tank 6 communicated with the bottom of the sedimentation tank 1 and the bottom of the downflow anaerobic bioreactor 2; the top surface of the down-flow anaerobic bioreactor 2 is closed, and a biological adhesion carrier component is arranged in the down-flow anaerobic bioreactor; the up-flow membrane filtration device 3 also comprises an aeration cavity 32 arranged along the periphery of the tube wall; the side wall and the bottom of the aeration cavity 32 are provided with injection pipes, and the aeration cavity 32 is communicated with the inside of the upflow membrane filtration device 3 through the injection pipes; the gas condensation tank 5 is communicated with the upper end of the permeable membrane module 31 of the upflow membrane filtration device 3 through a flushing gas compressor 51, and is communicated with the bottom end of the aeration cavity 32 through a gas lift compressor 52.
In particular, the wastewater to be treated can be pumped into the sedimentation tank 1 by means of a first peristaltic pump 13. The downflow anaerobic bioreactor 2 is connected with the sedimentation tank 1 through a water inlet pipe provided with a second peristaltic pump 14, and the tail end of the water inlet pipe is provided with a check valve 15 to prevent the treated wastewater from flowing back. The wall of the down-flow anaerobic bioreactor 2 is provided with a first electronic pressure sensor 26, a pH monitor 27 and a temperature controller 28, and the temperature in the reactor is kept at 30+/-1.0 ℃.
For the up-flow membrane filter device 3, the water inlet pipe provided with a butterfly valve 33 is connected with the lower end of the down-flow anaerobic bioreactor 2, wastewater in the up-flow membrane filter device 3 penetrates into the membrane pipe from the periphery of the membrane pipe, the wastewater is further purified through membrane filtration, purified water is collected at the upper end of the permeable membrane component 31, the permeable outlet pond 4 is connected through a bidirectional peristaltic pump 34, a first electronic flowmeter 35 and a second electronic pressure sensor 36, permeable water of the membrane component is led into the permeable outlet pond 4, and the water discharge of the permeable outlet pond 4 is regulated and controlled by a third peristaltic pump 41. Excess permeate water is returned to the upper portion of the downflow anaerobic bioreactor 2.
The gas condensation tank 5 is connected with the upper end of the downflow anaerobic bioreactor 2 through a pipeline provided with a gas flowmeter 50, and the condensed methane gas is connected with the upper end of the permeable membrane assembly 31 through a pipeline provided with a second electronic flowmeter 53, a flushing gas compressor 51 and a first valve 54 for backwashing the membrane assembly 31. The gas condensation tank 5 is connected with the lower end of the aeration cavity 32 through a third electronic flowmeter 55, a second valve 56 and a gas lift compressor 52.
In practical use, for the flushing gas compressor 51 and the gas lift compressor 52 of the application, various gas compressors with the same or different types can be selected according to the actual process conditions so as to realize the pressurizing and jetting effects on methane gas. Specifically, the membrane module is backwashed by flushing the gas compressor 51 to pressurize methane gas; for the gas lift compressor 52, the aeration cavity 32 and the jet pipe are connected, so that the generated methane gas is used as the water body flowing power inside the device, the water body is in a circulating flowing state, and the trapped water body in the up-flow type membrane filtering device 3 further enters the down-flow type anaerobic bioreactor 2 to start the next circulating treatment. As can be seen from the above description, the gas lift effect of the present application means: the gas collected from the device is passed through a gas compressor to form the power for the water flow and circulation in the device.
In operation of the reactor, gas from the gas condensation tank 5 enters from the bottom of the aeration cavity 32, fills the entire cavity, and is injected from the cavity into the upflow membrane filtration device through the injection pipe, generating bubbles. According to different settings of the positions and angles of the spray pipes, air flows in the vertical upward direction, the horizontal transverse direction or the oblique upward direction and the like are generated from the aeration cavity 32, so that the water flows are driven to flow and circulate upwards in the membrane filtering device, and the functions of flushing the membrane components and reducing membrane pollution are achieved. And the sludge recovery tank 6 recovers sediment at the bottoms of the sedimentation tank 1 and the downflow anaerobic bioreactor 2 through pipelines.
Preferably, the down-flow anaerobic bioreactor 2 is a cylindrical barrel, and the bioadhesive carrier assembly comprises a first inner tube 21 with a diamond-shaped bioadhesive carrier 211 mounted on the tube wall, a second inner tube 22 with a first spiral-type bioadhesive carrier 222 mounted on the outer side of the tube wall and a multi-layer bioadhesive carrier plate 221 mounted on the inner side of the tube wall, and a second spiral-type bioadhesive carrier 231 mounted on the inner side of the outer tube 23 of the down-flow anaerobic bioreactor 2; the wall of the first inner pipe 21 is a grid type permeable pipe wall, and the wall of the second inner pipe 22 is an overflow type pipe wall which cannot be penetrated by water flow transversely; the outer tube 23 and the second inner tube 22 of the down-flow anaerobic bioreactor 2 are connected at the bottom end by a bottom annular plate 24; the bottom end of the first inner tube 21 is fixedly connected to the bottom surface annular plate 24, the top end of the first inner tube 21 is connected with the top surface annular plate 25, and the top surface annular plate 25 surrounds the outer tube 23 of the downflow anaerobic bioreactor 2 for one circle and is fixedly connected; the water outlet at the upper end of the sedimentation tank 1 is connected with the water inlet of the downflow anaerobic bioreactor 2 through a second peristaltic pump 14, and the water inlet is arranged on the side surface of the bottom of the downflow anaerobic bioreactor 2 and is positioned above the bottom annular plate 24.
Specifically, the down-flow anaerobic bioreactor 2 is a cylindrical barrel, a double-layer inner pipe wall is arranged inside, a spiral adhesion carrier is arranged on the inner side of an outer pipe wall, a first inner pipe wall is a grid type permeable pipe wall, a rhombic biological adhesion carrier is arranged on the pipe wall, a second inner pipe wall is an overflow pipe wall, a spiral adhesion carrier is arranged on the outer side of the pipe wall, and a multi-layer biological adhesion carrier plate is arranged on the inner side of the second pipe wall. The specific materials and structures of the diamond-shaped biological adhesion carrier, the spiral adhesion carrier and the multi-layer biological adhesion carrier plate can be biological film carrier materials with large contact surface areas.
The second inner pipe 22 forms a deep groove structure which surrounds the periphery of the reactor with the outer pipe 23 and the bottom annular plate 24 of the downflow anaerobic bioreactor, the supernatant fluid inlet of the sedimentation tank enters the deep groove from the water inlets at the periphery, the water flow enters from the periphery of the bottom of the deep groove and overflows upwards, reaches the top annular plate 25, merges with the downward water flow at the center of the second inner pipe 22 at the top of the reactor, penetrates through the multi-layer biological attachment carrier plate 221 downwards, and enters the upflow membrane filtering device from bottom to top along the circular structure formed by the upflow membrane filtering device.
Preferably, as shown in fig. 6, the rhombic biological attachment carrier 211 is a hollow structure in the shape of a regular hexagon, and a rod-shaped carrier 2111 with a rough surface is arranged on each side of the regular hexagon; the multi-layered biological attachment carrier plate 221 is formed by splicing the diamond-shaped biological attachment carriers 211; the first screw type attaching carrier 222 and the second screw type attaching carrier 231 each include a cylindrical support carrier 2221 and a screw type bio-cotton carrier 2222 attached to the support carrier 2221.
Preferably, as shown in fig. 2 and 3, the upper part of the upflow membrane filtration device 3 is cylindrical, the lower part is a funnel-shaped shrink tube, and the lower end of the shrink tube is communicated with the lower end of the downflow anaerobic bioreactor 2 through an elbow pipe 37.
Specifically, the up-flow membrane filtration device 3 and the down-flow anaerobic bioreactor 2 comprise an elbow pipe 37, and can form an integrated structure according to practical situations.
Preferably, as shown in fig. 4 and 5, the spray pipes include a horizontal spray pipe 321 provided on a sidewall of the aeration cavity 32, an inclined spray pipe 322 provided on an inner wall of the shrinkage pipe of the aeration cavity 32, and a crisscross air pipe 323 provided in a cross-sectional direction of a bottom of the aeration cavity 32, the crisscross air pipe 323 communicating with the bottom of the aeration cavity 32, and a vertical spray pipe 324 provided on the crisscross air pipe 323.
Preferably, at the corner formed by the connection of the lower end of the down-flow anaerobic bioreactor 2 and the lower end of the up-flow membrane filtration device 3, there are aeration pipes 325 distributed along the wall of the inner arc corner, and the gas condensation tank 5 is connected with the aeration pipes 325 through a purge gas compressor 51.
Specifically, an aeration pipe 325 is arranged at the elbow of the inner pipe wall of the water inlet pipe to remove impurity precipitation caused by back flushing, so that the pipe wall is ensured to be smooth; a third valve 57 is also provided between the purge gas compressor 51 and the aerator pipe 325 for controlling the time and flow rate of the purge.
Preferably, a grid 11 is arranged at the upper part of the sedimentation tank, and an active carbon filter device 12 is arranged between the sedimentation tank 1 and the downflow anaerobic bioreactor 2; a dehydrator 61 is arranged at the front end of the sludge recovery tank 6 in the sludge feeding direction, a compressed water outlet of the dehydrator 61 is connected with the top end of the sedimentation tank 1, and a compressed residue outlet of the dehydrator 61 is communicated with the sludge recovery tank 6.
Specifically, sediment at the bottoms of the sedimentation tank 1 and the downflow anaerobic bioreactor 2 is conveyed to the dehydrator 61 through a pipeline, compressed effluent is returned to the sedimentation tank 1 through a pipeline for reprocessing, and compressed solid residues are recycled through the sludge recycling tank 6 and returned to the field for use.
Preferably, the permeate water tank 4 is communicated with the downflow anaerobic bioreactor 2 for refluxing part of permeate water.
Specifically, the amount of the water discharged from the permeate pool 4 is regulated and controlled by the third peristaltic pump 41, and the excessive permeate water is returned to the upper portion of the up-flow membrane filter device 3. The water is permeated out through the backflow part to form circulation, so that the water yield and the water outlet rate of the reactor can be regulated, and the water flow can be circulated to regulate the pollutant load of wastewater in the reactor, so that the reactor can stably and efficiently operate.
Preferably, the inclined jet pipe 322 has an angle of 30 ° with respect to the horizontal.
Specifically, by utilizing the spraying effect of methane gas, the arrangement of the inclination angle enables the back flushing of the membrane assembly to achieve a better effect, thereby being beneficial to reducing the occurrence of membrane pollution and enabling the membrane assembly to maintain a good state.
When the jet circulation type membrane bioreactor is used for water treatment, the methane gas generated by the device is used as water body flowing power in the device by the gas lift compressor 52, so that the water body is in a circulating flowing state, the anaerobic condition is ensured, the water body treatment efficiency is improved, and the trapped water body in the up-flow type membrane filter device further enters the down-flow anaerobic bioreactor to start the next circulation treatment.
Specifically, when the device is operated, after wastewater is led into a sedimentation tank, supernatant is led into a down-flow anaerobic bioreactor after sedimentation. In a downflow anaerobic bioreactor, a water stream penetrates a bioadhesive carrier assembly and simultaneously fills an upflow membrane filtration device. The pollutants in the wastewater react in a down-flow anaerobic bioreactor and an up-flow membrane filtration device. The gas generated in the reaction process flows into the gas condensation tank from above the downflow anaerobic bioreactor. The water discharged from the upper part of the permeable membrane component in the up-flow type membrane filtering device enters a permeable water tank, part of the water discharged from the permeable water tank is directly discharged, and the other part of the water returns to the down-flow type anaerobic bioreactor. And one part of the gas in the gas condensation tank enters a permeable membrane component of the up-flow type membrane filtration device through a compressor for backwashing of the membrane component, and the other part of the gas is sprayed into the up-flow type membrane filtration device through a spray pipe component through the compressor to generate upward water flow, so that the water flow circulation from the up-flow type membrane filtration device to the reverse anticlockwise direction of the down-flow type anaerobic bioreactor is realized.
For the degradation process of organic matters in sewage, the sewage is subjected to grating to remove impurities in the water, suspended matters are primarily removed through a sedimentation tank, part of oil is removed through adsorption of the yielding water of the sedimentation tank by an active carbon device, the digestion degradation of the organic matters is realized through the action of anaerobic bacteria (facultative anaerobic bacteria) by a downflow anaerobic bioreactor, the COD content is effectively reduced, and CH is formed simultaneously 4 The energy gas and the effluent further enter an up-flow membrane filter device to realize solid-liquid separation, and the treated effluent enters a permeation pond, so that the load of organic pollutants in the effluent is obviously reduced.
Device application examples:
the embodiment realizes the treatment of slaughterhouse wastewater by using the jet circulation type membrane bioreactor based on the gas lift effect, and the specific treatment process comprises the following steps:
untreated wastewater collected from the slaughterhouse homogenization tank is pumped into a sedimentation tank through a peristaltic pump, the treatment flow is 240L/d, and the Chemical Oxygen Demand (COD) of the extracted slaughterhouse wastewater is 5818mg/L. Raw water enters a sedimentation tank after being subjected to primary screening and adsorption to remove part of grease, and is pumped into a downflow anaerobic bioreactor after being precipitated in the sedimentation tank, wherein the radius of the downflow anaerobic bioreactor is 0.3m, the height of the downflow anaerobic bioreactor is 0.8m, the temperature in the reactor is kept at 30+/-1.0 ℃, the installation interval between the multi-layer biological adhesion carrier plates in the reactor is 3 cm+/-0.2 cm, the diameter of a medium carrier is 1cm, and the thickness of the medium carrier is about 5mm. The filler carrier in the downflow anaerobic bioreactor is cultured for 15 days in a closed mode to realize film hanging. After the film hanging is finished, the operation is carried out, and the effluent flows out through a pipelineCirculating to the up-flow membrane filter device. The radius of the up-flow membrane filter device is 0.15m, the height is 0.5m, a hollow fiber membrane (PVDF) is adopted, and the filtering area of the membrane is 0.93m 2 Pore size of 0.04 μm, 10 times smaller than the volume of bacteria, and hydrophilic surface is advantageous in preventing membrane contamination.
The volume of the osmotic pond is 1L, the front end is connected with the osmotic membrane component through a water inlet pipe and a bidirectional peristaltic pump, the water outlet of the osmotic membrane component is received, the bidirectional peristaltic pump can adjust the water flow direction so as to realize back flushing of the membrane, the back flushing frequency is 7min, the back flushing time is 30s, and the back flushing strength is 1.75.
The gas condensation tank is connected with the upper end of the downflow anaerobic bioreactor through a pipeline provided with a gas flowmeter, one part of condensed methane gas is used for back flushing of the membrane assembly through a flushing gas compressor, and the other part of condensed methane gas is sprayed into the upflow membrane filtration device through a gas lift compressor, so that the circulating work of the whole device is realized through a gas lift effect. The front end of the sludge recovery tank is connected with a dehydrator, sediment at the bottoms of the sedimentation tank and the downflow anaerobic bioreactor is conveyed to the dehydrator through a pipeline, compressed effluent flows back to the sedimentation tank through a pipeline for reprocessing, and compressed solid residues are recovered through the sludge recovery tank and returned to the field for use.
In the sewage treatment process by using the device, the COD concentration change in the wastewater is monitored, and a COD removal effect curve graph of the sewage with the initial COD concentration of 5818mg/L in each stage of the reactor operation is obtained as shown in figure 7. As can be seen from fig. 7, after the slaughterhouse wastewater is treated by the device, the COD concentration is reduced to a lower level on day 18 and gradually approaches complete degradation. Therefore, the device is used for treating sewage with higher concentration of organic pollutants, and can achieve better purifying effect.
As can be seen from the specific description of the embodiment, the jet circulation type membrane bioreactor based on the gas lift effect provided by the application realizes the power circulation of the device by efficiently utilizing methane gas generated in the treatment process, is beneficial to reducing the operation energy consumption, and is beneficial to improving the membrane hanging efficiency by carrier filler; through aeration cavity and aeration pipe's setting, promote the water velocity, slow down rivers disturbance in order to improve back flush efficiency, and then slow down the membrane internal pollution, effectively improve quality of water, increase membrane module life guarantees the low energy consumption operation simultaneously, reaches green, reduce cost's effect.
The application has been described in detail in connection with the specific embodiments and exemplary examples thereof, but such description is not to be construed as limiting the application. It will be understood by those skilled in the art that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present application and its embodiments without departing from the spirit and scope of the present application, and these fall within the scope of the present application. The scope of the application is defined by the appended claims.
Claims (9)
1. The jet circulation type membrane bioreactor based on the gas lift effect is characterized by comprising a sedimentation tank, a downflow anaerobic bioreactor communicated with the upper end of the sedimentation tank, an up-flow membrane filtering device which is respectively communicated with the upper and lower parts of the downflow anaerobic bioreactor to form a loop structure, a permeation water tank communicated with a permeation membrane component in the up-flow membrane filtering device, a gas condensation tank communicated with the top end of the downflow anaerobic bioreactor, and a sludge recovery tank communicated with the bottom of the sedimentation tank and the bottom of the downflow anaerobic bioreactor;
the top surface of the down-flow anaerobic bioreactor is closed, and a biological adhesion carrier component is arranged in the down-flow anaerobic bioreactor;
the up-flow membrane filter device also comprises an aeration cavity arranged along the periphery of the tube wall; the side wall and the bottom of the aeration cavity are provided with jet pipes, and the aeration cavity is communicated with the inside of the upflow membrane filtration device through the jet pipes;
the gas condensation tank is communicated with the upper end of the permeable membrane component of the upflow membrane filtering device through a flushing gas compressor, and is communicated with the bottom end of the aeration cavity through a gas lift compressor;
the downflow anaerobic bioreactor is a cylindrical barrel, and the internal biological adhesion carrier component comprises a first inner pipe with biological adhesion carriers arranged on the pipe wall, a second inner pipe with a first spiral adhesion carrier arranged on the outer side of the pipe wall and a plurality of layers of biological adhesion carrier plates arranged on the inner side of the pipe wall, and a second spiral adhesion carrier arranged on the inner side of the outer pipe wall of the downflow anaerobic bioreactor; the biological attachment carrier is of a regular hexagon snow-like hollow structure; the wall of the first inner pipe is a grid type permeable pipe wall, and the wall of the second inner pipe is an overflow type pipe wall which cannot be penetrated by water flow transversely;
the outer pipe and the second inner pipe of the downflow anaerobic bioreactor are connected at the bottom end through a bottom annular plate; the bottom end of the first inner tube is fixedly connected to the bottom surface annular plate, the top end of the first inner tube is connected with the top surface annular plate, and the top surface annular plate surrounds the outer tube of the down-flow anaerobic bioreactor for one circle and is fixedly connected;
the water outlet at the upper end of the sedimentation tank is connected with the water inlet of the downflow anaerobic bioreactor through a second peristaltic pump, and the water inlet is arranged on the side surface of the bottom of the downflow anaerobic bioreactor and is positioned above the bottom annular plate.
2. The spray circulation type membrane bioreactor according to claim 1, wherein in the regular hexagonal snowflake-shaped hollowed-out structure of the biological attachment carrier, rod-shaped carriers with rough surfaces are arranged on each side of the regular hexagon; the multi-layer biological adhesion carrier plate is formed by splicing the biological adhesion carriers; the first spiral attaching carrier and the second spiral attaching carrier comprise cylindrical supporting carriers and spiral biological cotton carriers connected to the supporting carriers.
3. The spray circulation type membrane bioreactor according to claim 1, wherein the upper part of the up-flow type membrane filtration device is cylindrical, the lower part of the up-flow type membrane filtration device is a funnel-shaped shrinkage tube, and the lower end of the shrinkage tube is communicated with the lower end of the down-flow type anaerobic bioreactor through an elbow tube.
4. The spray circulation type membrane bioreactor according to claim 3, wherein the spray pipes comprise horizontal spray pipes arranged on the side wall of the aeration cavity, inclined spray pipes arranged on the inner wall of the shrinkage pipe of the aeration cavity, and crisscross ventilation pipes arranged in the cross section direction of the bottom of the aeration cavity, the crisscross ventilation pipes are communicated with the bottom of the aeration cavity, and vertical spray pipes are arranged on the crisscross ventilation pipes.
5. The spray circulation type membrane bioreactor according to claim 1, wherein aeration pipes distributed along the wall of the inner arc corner are arranged at the corner formed by the connection of the lower end of the downflow anaerobic bioreactor and the lower end of the upflow membrane filtration device, and the gas condensation tank is connected with the aeration pipes through a flushing gas compressor.
6. The spray circulation type membrane bioreactor according to claim 1, wherein a grid is arranged at the upper part of the sedimentation tank, and an activated carbon filter device is arranged between the sedimentation tank and the downflow anaerobic bioreactor;
the front end of the sludge recycling tank in the sludge feeding direction is provided with a dehydrator, a compression water outlet of the dehydrator is connected with the top end of the sedimentation tank, and a compression residue outlet of the dehydrator is communicated with the sludge recycling tank.
7. The spray circulation type membrane bioreactor according to claim 1, wherein the permeate water tank is communicated with the downflow anaerobic bioreactor for refluxing a portion of permeate water.
8. The spray circulation type membrane bioreactor according to claim 4, wherein the inclined spray pipe has an angle of 30 ° with respect to the horizontal.
9. A method for water treatment by using the jet circulating type membrane bioreactor as claimed in any one of claims 1 to 8, characterized in that a gas lift compressor uses methane gas generated in the jet circulating type membrane bioreactor as water body flowing power inside the device to enable the water body to be in a circulating flow state, so that trapped water body in an up-flow type membrane filter device further enters a down-flow type anaerobic bioreactor to start the next circulating treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210848845.0A CN115321748B (en) | 2022-07-19 | 2022-07-19 | Jet circulation type membrane bioreactor based on gas lift effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210848845.0A CN115321748B (en) | 2022-07-19 | 2022-07-19 | Jet circulation type membrane bioreactor based on gas lift effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115321748A CN115321748A (en) | 2022-11-11 |
| CN115321748B true CN115321748B (en) | 2023-10-24 |
Family
ID=83917547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210848845.0A Active CN115321748B (en) | 2022-07-19 | 2022-07-19 | Jet circulation type membrane bioreactor based on gas lift effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115321748B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557250A (en) * | 2012-01-18 | 2012-07-11 | 湘潭大学 | Biogas circulating electromagnetic anaerobic membrane bio-reactor for wastewater treatment |
| CN114314828A (en) * | 2021-12-31 | 2022-04-12 | 西南交通大学 | Anaerobic fluidized bed membrane bioreactor |
-
2022
- 2022-07-19 CN CN202210848845.0A patent/CN115321748B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557250A (en) * | 2012-01-18 | 2012-07-11 | 湘潭大学 | Biogas circulating electromagnetic anaerobic membrane bio-reactor for wastewater treatment |
| CN114314828A (en) * | 2021-12-31 | 2022-04-12 | 西南交通大学 | Anaerobic fluidized bed membrane bioreactor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115321748A (en) | 2022-11-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101759324B (en) | Biological filter-ceramic membrane biological reactor device and water purifying application method thereof | |
| CN102107988B (en) | Phenol-amine wastewater treatment and recycling method and device | |
| CN1232453C (en) | Mehtod and apparatus for treating waste water | |
| CN1931749A (en) | Paper-making effluent purifying treatment process | |
| CN1182052C (en) | Process and apparatus for wastewater by batched membrane-bioreactor | |
| CN101643269A (en) | Biological aerated filter and process | |
| CN101781058A (en) | AO-MBR sewage treatment process and device | |
| CN105000666A (en) | Wastewater biological membrane reactor based on filler and folding plates | |
| CN1208262C (en) | High concentration oxganic effluent treatment composite process and its equipment | |
| CN201598221U (en) | Biofilter-ceramic membrane bioreactor | |
| CN114262052A (en) | Anaerobic membrane bioreactor and organic sewage treatment method | |
| CN106007267A (en) | Large integrated sewage treatment device and sewage treatment technology | |
| CN101037282A (en) | Water treatment new combined technique with high purification function | |
| CN102190397A (en) | Integrated reclaimed water reuse equipment | |
| CN101618907A (en) | Self-cleaning biological filter and self-cleaning technology of filter | |
| CN115321748B (en) | Jet circulation type membrane bioreactor based on gas lift effect | |
| CN101391833A (en) | Filter tank type membrane bioreactor | |
| CN114735821B (en) | Sewage treatment method and system based on continuous flow aerobic granular sludge | |
| CN1803675A (en) | Method and apparatus for advanced treatment and reclamation of industrial wastewater | |
| CN112744915B (en) | Mechanical scrubbing membrane biological reaction system and method | |
| KR20200000056A (en) | The method and apparatus for treatment of livestock manure, livestock wastewater or livestock washing water using ceramic membrane | |
| CN1935689A (en) | Apparatus and method for treating sewage by air-lift internal circulating membrane bioreactor | |
| KR100822292B1 (en) | High-concentration waste-water and livestockwastewater treatment device | |
| CN104355493B (en) | A kind of integrated aerobic advanced treatment apparatus | |
| CN114436472A (en) | Movable advanced sewage treatment system based on embedded microorganism construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |