CN114195254A - Method and device for slowing down membrane pollution in membrane bioreactor - Google Patents
Method and device for slowing down membrane pollution in membrane bioreactor Download PDFInfo
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- CN114195254A CN114195254A CN202210084280.3A CN202210084280A CN114195254A CN 114195254 A CN114195254 A CN 114195254A CN 202210084280 A CN202210084280 A CN 202210084280A CN 114195254 A CN114195254 A CN 114195254A
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- 239000012528 membrane Substances 0.000 title claims abstract description 240
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000004907 flux Effects 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000010865 sewage Substances 0.000 claims abstract description 24
- 239000010802 sludge Substances 0.000 claims abstract description 20
- 238000005273 aeration Methods 0.000 claims description 23
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000009285 membrane fouling Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 6
- 239000012510 hollow fiber Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000108 ultra-filtration Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000005276 aerator Methods 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Activated Sludge Processes (AREA)
Abstract
A method and a device for reducing membrane pollution in a membrane bioreactor are characterized in that a reciprocating swing type stretching device is designed to drive an MBR membrane in an MBR membrane stack to swing left and right in a reciprocating mode, a motor of the stretching device is controlled by a PLC (programmable logic controller) of sewage treatment equipment, the motor speed of the stretching device is related to membrane flux, the membrane flux is fed back to a PLC control system through an electromagnetic flowmeter on the outlet of a water outlet pump, when the membrane flux is reduced, the PLC controls a frequency converter to accelerate the rotating speed of the motor of the stretching device, so that the rapid swing of an MBR membrane component is driven, the self-adaption of the membrane flux is driven, the defect that sludge at two ends of a membrane component of a submerged membrane bioreactor fixed at two ends is easy to agglomerate and block is overcome, and the membrane pollution is reduced PLC controller and sewage treatment device switch board.
Description
Technical Field
The invention relates to a method and a device for slowing down membrane pollutants in a membrane bioreactor in the technical field of membrane water treatment.
Background
In recent years, the application of membrane separation technology has become more widespread. Microfiltration, ultrafiltration, nanofiltration and reverse osmosis membrane technologies have been widely used in the fields of water pollution treatment, sea water desalination, brackish water desalination, pure water (ultrapure water) preparation, special separation and the like. The hollow fiber ultrafiltration membrane is widely used for sludge-water separation and replacing a secondary sedimentation tank, and a large number of Membrane Bioreactors (MBR) integrating biochemical treatment and membrane filtration are widely used for municipal sewage treatment or dispersive sewage treatment. The most widely used MBR is an immersed membrane stack, a curtain type MBR membrane component is immersed in an aerobic biochemical tank, and micropores on the surface of a hollow fiber ultrafiltration membrane only allow water to pass through under the negative pressure suction action of a siphon or a water production pump, so that the water can permeate from outside to inside to realize the separation of activated sludge and water. Activated sludge is intercepted in the biochemical tank, so that the sludge concentration is high, the treatment efficiency is high, the occupied area is small, the effluent quality is good, the automation degree is high, and unattended operation can be realized. However, after long-time operation, a large number of microorganisms are attached to the membrane surface, which causes partial membrane pores to be blocked, and further causes the membrane flux to be reduced. Aeration quantity is increased, and the modes of adding chemicals for back washing, improving membrane hydrophilicity and the like are adopted to slow down membrane pollution. MBR membranes are basically curtain-type membrane modules, and both ends of the modules are fixed on stainless steel membrane supports at certain intervals. The distance between the upper part and the lower part of the membrane frame is shorter than that of the membrane component, and the hollow fiber membrane yarns naturally droop under the action of the gravity of the hollow fiber membrane. The bottom of the membrane stack is provided with an aerator, and the high-speed rising air flow generated by the fan drives the hollow fiber membrane to swing, so that the surface of the MBR membrane is washed by the air flow. In the filtering process of the MBR membrane, under the negative pressure action of a suction pump, a part of sludge can be deposited on the surface of the membrane wire, the air blown into the bottom of the membrane frame through an aerator has a scrubbing effect on the outer surface of the hollow fiber membrane, the sludge adhered to the surface of the membrane is removed, the concentration polarization on the surface of the membrane is reduced, and the sludge is prevented from being deposited on the surface of the membrane so as to delay membrane pollution. According to the MBR assembly with the two ends fixedly installed, the membrane filaments are tightly arranged at the two ends of the MBR assembly, the membrane filament gaps are small, and air flow is difficult to reach. Although many inventors adopt various modes such as intermittent water outlet, combined aeration, staged aeration, embedding of an aeration pipe, a vibration type membrane assembly and regular liquid medicine backwashing in membrane filaments to slow down pollution of the MBR membrane, sludge accumulation can be generated in areas which are difficult to reach by airflow at two ends of membrane filaments of the fixed MBR membrane assembly, sludge deposition on the MBR membrane starts from two ends of the MBR membrane, a large number of membrane filaments are integrated by sludge, and a caking area gradually extends towards the middle of the membrane filaments along with the growth of an operation market, so that the whole MBR membrane assembly is completely caked by sludge and blocked, membrane flux is greatly reduced, and water yield of the membrane is reduced.
To the problem that has the aeration in the middle of the MBR membrane silk and can not reach, when the MBR membrane module encapsulation, with the aeration pipe embedded between the membrane silk (ZL 201020257181.3), the all-round aeration of MBR membrane module is realized to the perforation aeration pipe and the embedded aeration pipe of MBR membrane heap bottom, eliminated the membrane pollution that the inside can not the aeration of membrane silk leads to greatly, the long-pending mud in the middle of the membrane silk has fine alleviating with the caking phenomenon, but still has the problem of mud caking at MBR membrane module both ends. Aiming at the defects of MBR membrane modules with fixed two ends, a method for accelerating the swing frequency of the membrane modules through a frequency converter when the swing frequency is associated with the membrane flux by a swing type membrane bioreactor device adaptive to the membrane flux is urgently needed to be developed.
Disclosure of Invention
The invention aims to provide a method and a device for slowing down membrane pollution in a membrane bioreactor, which overcome the defect that sludge caking is easy to exist at two ends of a membrane component of an original immersed membrane bioreactor.
A method for slowing down membrane pollution in a membrane bioreactor is characterized by comprising the following steps: the reciprocating swing type stretching device is designed to drive an MBR membrane in an MBR membrane stack to swing left and right in a reciprocating mode, a motor of the stretching device is controlled by a PLC (programmable logic controller) of sewage treatment equipment, the motor speed of the stretching device is related to membrane flux, the membrane flux is fed back to a PLC control system through an electromagnetic flowmeter on the outlet of a water outlet pump, when the membrane flux is reduced, the PLC controls the rotating speed of the motor of the stretching device through a frequency converter, so that the MBR membrane component is driven to swing quickly, and the frequency converter is adaptive to the membrane flux, so that the defect that sludge at two ends of a membrane component of a fixed submerged membrane bioreactor at two ends is easy to agglomerate due to the swing of the membrane component with different frequencies is overcome, and membrane pollution is reduced.
The device for realizing the method for slowing down the membrane pollution in the membrane bioreactor comprises the following steps: the method is characterized in that: the device comprises an MBR membrane component, an MBR membrane component bracket, a speed reducing motor, a frequency converter, a cam, a stretching rod, a perforated aeration pipe, an MBR membrane component fixing ring, a fixing rod, a PLC controller and a sewage treatment equipment control cabinet, wherein the MBR membrane component is arranged in an MBR membrane clamping groove of the MBR membrane component bracket, the lower end of the MBR membrane component is not fixed, the MBR membrane component freely droops down, the MBR membrane component fixing ring is arranged on a membrane shell at the top end of each MBR membrane component, a plurality of groups of MBR membrane components are fixed with the fixing rod by the stretching rod, one end of the stretching rod is connected with the cam on the speed reducing motor, the speed reducing motor drives the stretching rod to reciprocate left and right to drive the MBR membrane component to swing left and right in the membrane clamping groove, the perforated aeration pipe is arranged right below the left and right reciprocating swing range of the MBR membrane component, the air inlet of the perforated aeration pipe is connected with an air blower by a PVC air inlet pipe, and the water outlet of the MBR membrane component is connected with a stainless steel hose for water outlet pump, and an outlet of the water outlet pump is connected with an electromagnetic flowmeter for outputting 0-20V signals, and output signals of the electromagnetic flowmeter are connected with a PLC (programmable logic controller) in a sewage treatment equipment control cabinet through signal lines.
Furthermore, a speed reduction motor for drawing the MBR membrane module is controlled by a frequency converter in a sewage treatment equipment control cabinet, the frequency converter is associated with the flux value of the sewage treatment membrane, the flux is output by an electromagnetic flowmeter with 0-20V voltage output, when the membrane flux is reduced, the pollution of the membrane is increased, the numerical value of the membrane flux is input into a PLC (programmable logic controller) in the sewage treatment equipment control cabinet by the signal of the electromagnetic flowmeter, the PLC feeds back to the frequency converter of the stretching device according to a preset program, the rotating speed of the frequency converter is increased, the rotating speed of the MBR membrane stretching motor is increased by the motor, the swinging frequency of the MBR membrane module is further improved, the sludge on the surface of the MBR membrane is shaken off, and the self-adaption of the swinging frequency of the MBR membrane module and the membrane flux is realized.
Furthermore, in order to realize free swing of the MBR membrane assembly, the width of a clamping groove on the bracket of the MBR membrane assembly is 0.5-1 cm larger than the width of an MBR membrane shell, but transverse displacement cannot occur.
The invention has the advantages that: the output water flux of the MBR membrane is output by the signal of an electromagnetic flowmeter and is fed back to a frequency converter in a control cabinet through PLC control, the frequency converter drives an immersed MBR component to do left-right reciprocating swing in an aeration matrix formed by high-speed rising air flow through a speed reduction motor, a stretching rod, a fixed MBR membrane swing driving device and the like, and on one hand, the self-adaptation of the membrane flux and the MBR membrane component swing frequency is realized; on the other hand, the reciprocating swing of the MBR membrane component avoids the defect of aeration dead angles existing in the fixed MBR membrane stack, thereby slowing down membrane pollution caused by sludge deposition at the aeration dead angles in the use process of the MBR membrane. In the invention, the whole membrane is in motion, and the pollution on the surface of the membrane wire is greatly reduced compared with the traditional technology; in the prior art, the upper end and the lower end of a membrane component are fixed, and the root parts of membrane filaments close to the two ends of a membrane shell cannot effectively shake, so that the membrane shell is easy to cause a large amount of sludge to accumulate, further the membrane component is agglomerated, membrane pollution is caused, and membrane water production is reduced; in the invention, the membrane swinging device is related to the water production value of the membrane through a control system, and the membrane runs according to a set frequency when the membrane swinging device runs normally. When the membrane flux is obviously reduced (less than a set initial value), the swing motor accelerates the motor speed through the frequency converter, so that the swing speed of the MBR component is increased, and the sludge deposition on the surface of the MBR membrane is reduced.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
wherein: the device comprises an MBR membrane module support, 2 an MBR membrane clamping groove, 3 a speed reducing motor, 4 a frequency converter, 5 a cam, 6 a stretching rod, 7 a perforated aeration pipe, 8 a sewage treatment equipment shell, 9 an MBR membrane module, 10 an MBR membrane module fixing ring, 11 a fixing rod, 12 a stainless steel hose, 13 an air blower, 14 a water outlet pump, 15 an electromagnetic flow meter, 16 a PLC controller, 17 a sewage treatment equipment control cabinet, 18 a PVC air inlet pipe and 19 a signal line.
Detailed Description
Embodiments of the present invention are described in detail below with reference to the accompanying drawings:
a method for slowing down membrane pollution in a membrane bioreactor is characterized by comprising the following steps: the reciprocating swing type stretching device is designed to drive an MBR membrane in an MBR membrane stack to swing left and right in a reciprocating manner, a motor of the stretching device is controlled by a PLC (programmable logic controller) of sewage treatment equipment, the rotating speed of the motor of the stretching device is related to membrane flux, and the membrane flux is fed back to a PLC control system through 0-20V voltage of an electromagnetic flowmeter on the outlet of a water outlet pump; when the membrane flux reduces, PLC control accelerates the rotational speed of the stretching device motor through the converter to drive the quick swing of MBR membrane module, thereby realize with the self-adaptation of membrane flux: the frequency converter realizes the swing of the membrane component at different frequencies, and overcomes the defect that the sludge at the two ends of the membrane component of the fixed immersed membrane bioreactor is easy to agglomerate and agglomerate, thereby slowing down the membrane pollution.
The device for realizing the method for reducing the membrane pollution in the membrane bioreactor comprises an MBR membrane module bracket 1, an MBR membrane module 9, a speed reducing motor 3, a frequency converter 4, a cam 5, a stretching rod 6, a perforated aeration pipe 7, an MBR membrane module fixing ring 10, a fixing rod 11, a PLC controller 16 and a sewage treatment equipment control cabinet 17, wherein the MBR membrane module 9 is arranged in an MBR membrane clamping groove 2 of the MBR membrane module bracket 1, the MBR membrane module 9 freely droops, the lower end of the MBR membrane module 9 is not fixed, the MBR fixing ring 10 is arranged on a membrane shell at the top end of each MBR membrane module 9, a plurality of groups of MBR membrane modules 9 are fixed with the fixing rod 11 by the stretching rod 6, one end of the stretching rod 6 is connected with the cam 5 on the speed reducing motor 3, the speed reducing motor 3 drives the stretching rod 6 to swing left and right to drive the membrane module 9 to swing left and right in the MBR membrane clamping groove 2, the perforated aeration pipe 7 is arranged right below the left and right reciprocating swing range of the MBR membrane module 9, an air inlet of the perforated aeration pipe 7 is connected with an air blower 13 through a PVC air inlet pipe 18, a water outlet of the MBR membrane assembly 9 is connected with a water outlet pump 14 through a stainless steel hose 12, an outlet of the water outlet pump 14 is connected with an electromagnetic flowmeter 15 with 0-20V signal output, and an output signal of the electromagnetic flowmeter 15 is connected with a PLC (programmable logic controller) 16 in a sewage treatment equipment control cabinet 17 through a signal wire 19. The speed reduction motor 3 for drawing the MBR membrane module 9 is controlled by a frequency converter 4 in a sewage treatment equipment control cabinet 17, the frequency converter 4 is associated with the flux value of the sewage treatment membrane, the flux is output by an electromagnetic flowmeter 15 with 0-20V voltage output, when the membrane flux is reduced, the pollution of the membrane is shown to be increased, the numerical value of the membrane flux is input into a PLC (programmable logic controller) 16 in the sewage treatment equipment control cabinet by a signal of the electromagnetic flowmeter 15, the PLC 16 feeds back to the frequency converter 4 of the stretching device according to a preset program, the rotating speed of the frequency converter is increased, the rotating speed of the MBR membrane stretching motor is increased by the motor, the swinging frequency of the MBR membrane module 9 is further increased, the sludge on the surface of the MBR membrane is shaken off, and the self-adaptation of the swinging frequency of the MBR membrane module 9 and the membrane flux is realized. In order to realize free swing of the MBR membrane module 9, the width 2 of an MBR membrane clamping groove on the MBR membrane module support 1 is 0.5-1 cm larger than the width of an MBR membrane shell, but transverse displacement cannot occur.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several equivalent substitutions or obvious modifications, which are equivalent in performance or use, without departing from the inventive concept, should be considered to fall within the scope of protection determined by the claims as filed.
Claims (5)
1. A method for slowing down membrane pollution in a membrane bioreactor is characterized by comprising the following steps: the reciprocating swing type stretching device is designed to drive an MBR membrane in an MBR membrane stack to swing left and right in a reciprocating mode, a motor of the stretching device is controlled by a PLC (programmable logic controller) of sewage treatment equipment, the motor speed of the stretching device is related to membrane flux, the membrane flux is fed back to a PLC control system through an electromagnetic flowmeter on a water outlet pump, when the membrane flux is reduced, the PLC controls the rotating speed of the motor of the stretching device through a frequency converter, so that the rapid swing of the MBR membrane component is driven, the self-adaption of the membrane flux is achieved, and the frequency converter realizes the swing of the membrane component at different frequencies.
2. The device for realizing the method for slowing down the membrane pollution in the membrane bioreactor as claimed in claim 1, is characterized in that: the device comprises an MBR membrane module support (1), an MBR membrane module (9), a speed reducing motor (3), a frequency converter (4), a cam (5), a stretching rod (6), a perforated aeration pipe (7), an MBR membrane module fixing ring (10), a fixing rod (11), a PLC (programmable logic controller) controller (16) and a sewage treatment equipment control cabinet (17), wherein the MBR membrane module (9) is arranged in an MBR membrane clamping groove (2) on the MBR membrane support (1), and the MBR membrane module (9) is free to droop and unfixed at the lower end.
3. An MBR membrane component fixing ring (10) is arranged on a membrane shell at the top end of each MBR membrane component (9), a plurality of groups of MBR membrane components (9) are fixed with a fixing rod (11) by a stretching rod (6), one end of the stretching rod (6) is connected with a cam (5) on a speed reducing motor (3), the speed reducing motor (3) drives the stretching rod (6) to swing left and right, further the MBR membrane components (9) are driven to swing left and right in a membrane clamping groove (2), a perforated aeration pipe (7) is arranged under the swing range of the MBR membrane components (9), the air inlet of the perforated aeration pipe (7) is connected with an air blower (13) through a PVC air inlet pipe (18), the water outlet of the MBR membrane components (9) is connected with a water outlet pump (14) through a stainless steel hose (12), the outlet of the water outlet pump (14) is connected with an electromagnetic flow meter (15) outputting 0-20V signals, and the output signals of the electromagnetic flow meter (15) are connected with a signal line (19) and a PLC controller (16) in a sewage treatment equipment control cabinet (17) in phase And (4) connecting.
4. The device for reducing membrane pollution in a membrane bioreactor according to claim 2, wherein: a speed reduction motor (3) for drawing an MBR membrane module (9) is controlled by a frequency converter (4) of a sewage treatment equipment control cabinet (17), the frequency converter (4) is associated with the flux value of a sewage treatment membrane, the flux is output through an electromagnetic flowmeter (15) with 0-20V voltage output, when the membrane flux is reduced, the pollution of the membrane is increased, the numerical value of the membrane flux is input into a PLC (programmable logic controller) (16) in the sewage treatment equipment control cabinet by the signal of the electromagnetic flowmeter (15), the PLC (16) feeds back to the frequency converter (4) of a stretching device according to a preset program, the rotating speed of the frequency converter is increased, the rotating speed of the MBR membrane stretching motor is increased through the motor, the swinging frequency of the MBR membrane module (9) is further increased, sludge on the surface of the MBR membrane is shaken off, and the self-adaptation of the swinging frequency of the MBR membrane module (9) and the membrane flux is realized.
5. The device for reducing membrane fouling in a membrane bioreactor according to claim 2 or 3, wherein: in order to realize free swing of the MBR membrane module (9), the width (2) of a clamping groove on the MBR membrane module support (1) is 0.5-1 cm larger than the width of an MBR membrane shell, but the MBR membrane shell cannot generate transverse displacement.
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| CN202210084280.3A CN114195254B (en) | 2022-01-25 | 2022-01-25 | Method and device for slowing down membrane pollution in membrane bioreactor |
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| CN202210084280.3A CN114195254B (en) | 2022-01-25 | 2022-01-25 | Method and device for slowing down membrane pollution in membrane bioreactor |
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| CN114195254A true CN114195254A (en) | 2022-03-18 |
| CN114195254B CN114195254B (en) | 2023-11-17 |
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| CN104710075A (en) * | 2015-02-17 | 2015-06-17 | 浙江工业大学 | Pendulum type hollow fiber membrane biological response water purifying system and application |
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| CN111362400A (en) * | 2019-12-06 | 2020-07-03 | 北京石油化工学院 | Reciprocating type MBR cleaning device and overturning frequency algorithm |
| CN111439842A (en) * | 2020-05-27 | 2020-07-24 | 天津碧水源膜材料有限公司 | Longitudinal vibration's MBR corrugated membrane device |
| JPWO2020240901A1 (en) * | 2019-05-30 | 2020-12-03 | ||
| CA3135230A1 (en) * | 2021-10-20 | 2022-01-03 | Premier Tech Technologies Limitee | Methods and devices for cleaning bioreactor media |
-
2022
- 2022-01-25 CN CN202210084280.3A patent/CN114195254B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104710075A (en) * | 2015-02-17 | 2015-06-17 | 浙江工业大学 | Pendulum type hollow fiber membrane biological response water purifying system and application |
| CN107352642A (en) * | 2017-08-23 | 2017-11-17 | 北京桑德环境工程有限公司 | Energy-efficient integrated MBR devices and its sewage water treatment method |
| JPWO2020240901A1 (en) * | 2019-05-30 | 2020-12-03 | ||
| CN210528572U (en) * | 2019-06-13 | 2020-05-15 | 福州科煌生态环保科技有限公司 | Energy-saving MBR sewage treatment plant |
| CN111362400A (en) * | 2019-12-06 | 2020-07-03 | 北京石油化工学院 | Reciprocating type MBR cleaning device and overturning frequency algorithm |
| CN111439842A (en) * | 2020-05-27 | 2020-07-24 | 天津碧水源膜材料有限公司 | Longitudinal vibration's MBR corrugated membrane device |
| CA3135230A1 (en) * | 2021-10-20 | 2022-01-03 | Premier Tech Technologies Limitee | Methods and devices for cleaning bioreactor media |
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