CN115417498A - Efficient and green device and method for online maintainable cleaning of MBR (membrane bioreactor) membrane by micro-nano bubbles - Google Patents
Efficient and green device and method for online maintainable cleaning of MBR (membrane bioreactor) membrane by micro-nano bubbles Download PDFInfo
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- CN115417498A CN115417498A CN202211219554.1A CN202211219554A CN115417498A CN 115417498 A CN115417498 A CN 115417498A CN 202211219554 A CN202211219554 A CN 202211219554A CN 115417498 A CN115417498 A CN 115417498A
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- 239000012528 membrane Substances 0.000 title claims abstract description 94
- 239000002101 nanobubble Substances 0.000 title claims abstract description 87
- 238000004140 cleaning Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 92
- 238000012423 maintenance Methods 0.000 claims description 18
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 16
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 239000003814 drug Substances 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract description 2
- 238000003911 water pollution Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 6
- 238000005273 aeration Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- -1 hydroxyl free radical Chemical class 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000011001 backwashing Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
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- 239000012459 cleaning agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 230000004907 flux Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 238000007667 floating Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
- C02F3/1273—Submerged membrane bioreactors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/18—Use of gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/28—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling by soaking or impregnating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Chemical Kinetics & Catalysis (AREA)
- Biodiversity & Conservation Biology (AREA)
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention belongs to the technical field of water pollution prevention and control, and particularly relates to a device and a method for efficiently cleaning an MBR membrane by micro-nano bubbles in an online maintainable manner, wherein the device comprises the following steps: the MBR membrane tank is used for accommodating all parts; the water inlet tank is arranged inside the MBR membrane tank, and the outer wall of the water inlet tank is provided with a water inlet hole for intercepting suspended matters; the micro-nano bubble generating device is arranged inside the water inlet tank and is used for generating micro-nano bubbles; and the MBR membrane module is arranged inside the MBR membrane tank. The invention can reduce the load energy consumption, save the medicament operation cost, take effect quickly, reduce the frequency of off-line cleaning, improve the system treatment efficiency and prolong the whole service life of the MBR membrane system.
Description
Technical Field
The invention belongs to the technical field of water pollution prevention and control, and particularly relates to a device and a method for efficiently cleaning an MBR membrane by micro-nano bubbles in an online maintainable manner.
Background
MBR (Membrane bioreactor) is a new water treatment technology combining a Membrane separation unit and a biological treatment unit. The technology replaces a secondary sedimentation tank with a membrane component, and can carry out high-efficiency solid-liquid separation. In the operation of membrane systems, membrane fouling is a key factor affecting the long-term stable operation of MBR processes. In the process of generating membrane pollution, a mud cake layer consisting of particles, microorganisms and suspended substances deposited on the surface of the membrane is a main factor influencing the membrane pollution and accounts for 60 percent of the total resistance, a gel layer consisting of macromolecular organic matters such as microbial exopolymers, soluble microbial metabolites and the like has the contribution rate of 32 percent to the membrane pollution, and an inorganic scale layer and residual resistance account for 8 percent of the contribution rate to the membrane pollution.
In general, MBR membrane maintenance online cleaning mainly adopts an air aeration cleaning method and a clear water backwashing method to clean sludge and dirt of MBR hollow fiber membranes. The air aeration cleaning is to wash off a mud cake layer on the surface of the membrane by utilizing the circulation and shearing force of water, and the clear water back flushing is to apply back flushing pressure on a water outlet of the membrane so as to enable the treated water or the mixed fluid of the treated water and air to reversely penetrate through the membrane for washing.
Although the method can obviously improve the cleaning of the mud cake layer, the removal effect on the gelled layer is not large, especially for a system with serious organic and biological pollution, the organic pollution is generally concentrated in a boundary layer with the water flow rate basically zero, the gas in the region is not easy to reach, the cleaning effect cannot be further improved, the air aeration energy consumption and the water pump energy consumption are large, the off-line cleaning frequency needs to be improved based on the requirement, and the production is stopped.
A special chemical cleaning agent can be added in the clear water backwashing method for cleaning; the special dispensing workshop is required to be configured, equipment, pipelines and the like are matched, the investment cost is high, and the chemical agents can influence the physical and chemical characteristics of the membrane filaments, so that the membrane aging process is accelerated, and the service life of the membrane is further shortened.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the device and the method for cleaning the MBR membrane in an efficient and green online maintenance manner by using the micro-nano bubbles, and the device and the method have the advantages of improving the productivity and prolonging the service life of the MBR membrane.
The technical purpose of the invention is realized by the following technical scheme, and the device for cleaning the MBR membrane in an efficient and green online maintenance manner by using the micro-nano bubbles comprises:
the MBR membrane tank is used for accommodating all parts;
the water inlet tank is arranged inside the MBR membrane tank, and the outer wall of the water inlet tank is provided with a water inlet hole for intercepting suspended matters;
the micro-nano bubble generating device is arranged inside the water inlet tank and is used for generating micro-nano bubbles;
and the MBR membrane module is arranged inside the MBR membrane tank.
In one embodiment, the micro-nano bubble generating device includes:
the water pump is arranged inside the water inlet tank and is used for conveying water;
the gas inlet pipeline is used for conveying gas;
and the micro-nano bubble generator is communicated with the water outlet end of the water pump and the air outlet end of the air inlet pipeline and used for generating micro-nano bubbles.
In one embodiment, a grid is arranged on the water inlet hole.
In one embodiment, a valve is arranged on the air inlet pipeline and used for controlling the air flow entering the micro-nano bubble generator.
In one embodiment, the inside of the micro-nano bubble generator is in a high vacuum state.
In one embodiment, a vacuum pressure gauge is arranged on the air inlet pipeline and used for monitoring the vacuum pressure value in the micro-nano bubble generator.
In one embodiment, the water inlet hole is arranged in plurality at intervals.
In one embodiment, the water outlet end of the micro-nano bubble generating device is communicated with a water outlet diffuser.
The invention also provides a method for cleaning the MBR membrane in an efficient and green online maintenance manner by using the micro-nano bubbles, which comprises the following steps:
(1) Water in the MBR membrane tank enters the water inlet tank and is conveyed to the micro-nano bubble generating device;
(2) The gas enters the micro-nano bubble generating device through negative pressure self-suction;
(3) The micro-nano bubble generating device fully mixes water and gas to form micro-nano bubbles;
(4) And uniformly mixing the micro-nano bubbles into water in the MBR membrane tank to clean the MBR membrane module.
The device and the method for cleaning the MBR membrane in an efficient and green online maintenance manner by using the micro-nano bubbles have the following beneficial effects:
firstly, the productivity is improved, the frequency of off-line cleaning is reduced, the device can realize in-situ efficient cleaning, stop production and water supply, obviously reduce the transmembrane pressure difference of the MBR membrane in a short time, delay the rising speed of the transmembrane pressure difference and reduce the frequency of off-line cleaning, thereby improving the productivity;
secondly, the overall service life of the MBR membrane system is prolonged, the attenuation speed of the membrane flux is reduced through deep cleaning of the device, the structural stability of the activated sludge is enhanced, flocculent activated sludge flocs become larger, the filtering separation of the MBR membrane is facilitated, and the service life of the MBR membrane is prolonged;
thirdly, energy conservation and consumption reduction are realized, the operation cost is reduced, the energy consumption, the medicament cost and the labor cost of the water pump are saved, the operation cost is controlled, the device has no noise in operation, is flexible to operate, does not generate secondary pollution, and has good promotion effects on improving the post operation environment and improving the enterprise image;
fourthly, improving system treatment efficiency, showing and improving productivity effect, this device can assist MBR membrane system improvement system treatment efficiency, and the hydroxyl free radical that the bubble produced at the in-process that explodes and splits can oxidize the material of difficult degradation, promotes the processing water quality, reduces the mud output of MBR membrane system, is showing the productivity effect that improves sewage treatment plant.
Drawings
FIG. 1 is a schematic view of the structure of the apparatus;
FIG. 2 is a system flow diagram of the present apparatus;
FIG. 3 is a system flow chart of the micro-nano bubble generation device;
FIG. 4 is a flowchart of the steps of the present embodiment;
FIG. 5 is a transmembrane pressure difference change curve diagram of the micro-nano cleaning line and the contrast line of the device.
In the figure: 1. an MBR membrane tank; 2. a water inlet tank; 21. a water inlet hole; 3. a micro-nano bubble generating device; 31. a water pump; 32. an air intake duct; 33. a micro-nano bubble generator; 4. MBR membrane module.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two unless there is an explicit preferred limitation.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
A device for cleaning an MBR membrane in an efficient and green online maintenance manner by micro-nano bubbles is shown in figures 1, 2 and 4 and comprises an MBR membrane pool 1, a water inlet tank 2, a micro-nano bubble generating device 3 and an MBR membrane module 4.
Wherein, the MBR membrane tank 1 is used for accommodating all parts; the water inlet tank 2 is arranged inside the MBR membrane tank 1, the outer wall of the water inlet tank 2 is provided with a water inlet hole 21, water in the MBR membrane tank 1 enters the water inlet tank 2 through the water inlet hole 21, and large-volume particulate matters and suspended matters in the MBR membrane tank 1 are intercepted while water is fed; the micro-nano bubble generating device 3 is arranged inside the water inlet tank 2 and is used for generating micro-nano bubbles; the MBR membrane module 4 is arranged inside the MBR membrane tank 1.
The micro-nano bubble generating device 3 generates gas-liquid mixed water containing micro-nano bubbles and diffuses the gas-liquid mixed water into the MBR membrane tank 1. The micro-nano bubbles have high-efficiency interface activity and super-strong permeation action and micro-explosive force, and through permeation relaxation and air flotation action, the binding force of sediments and the surface of a substrate is weakened, dirt is adsorbed, residues are taken away, and the effect of cleaning the MBR membrane module 4 in the water tank is achieved.
The surface of the micro-nano bubbles is charged, more suspended substances such as colloids can be adsorbed, the micro-nano bubbles can also excite a large number of hydroxyl radicals to be generated at the moment of collapse and rupture, the hydroxyl radicals have strong oxidation effect and have chain breaking effect on organic pollutants which are difficult to degrade and remove, and the cleaning effect of the MBR membrane is obviously improved by the high-speed water flow impact of the micro-space and the strongly oxidized hydroxyl radicals. And the micro-nano bubble generating device 3 can also enhance the microbial activity in the sewage and improve the sewage treatment capacity in the application of the MBR membrane system.
Compare traditional online chemical maintenance nature cleaning mode, the high-efficient washing of normal position just can be realized to micro-nano bubble cleaning technology and adopt the nimble operation of mobile device, resumes the membrane flux of MBR membrane in the short time, and the normal operating of system is guaranteed to the water that does not stop producing. The air-blast aeration and cleaning energy consumption can be saved, chemical cleaning agents and labor cost can be greatly saved, the operation and maintenance cost can be controlled, secondary pollution is not generated by the micro-nano bubble cleaning technology, membrane yarns cannot be damaged at all, the overall service life of the MBR membrane system can be prolonged, sludge can be reduced, the sewage treatment capacity of the MBR membrane process is improved, and the good environment-friendly economic benefit is achieved.
Preferably, as shown in fig. 1 and 3, the micro-nano bubble generating device 3 includes a water pump 31, an air inlet pipe 32, and a micro-nano bubble generator 33.
Wherein, the water pump 31 is arranged inside the water inlet tank 2 and used for conveying water; the gas inlet duct 32 is used for conveying gas; the micro-nano bubble generator 33 is communicated with the water outlet end of the water pump 31 and the air outlet end of the air inlet pipeline 32, and is used for generating micro-nano bubbles.
Preferably, as shown in fig. 1, the water inlet 21 is provided with a grating to further intercept the floating objects in the water.
Preferably, a valve is arranged on the air inlet pipeline 32 and used for controlling the air flow entering the micro-nano bubble generator 33.
Further, the interior of the micro-nano bubble generator 33 is in a high vacuum state, and can suck gas to reduce pressure and accelerate, and high-speed gas flow is formed along with the rotation and backflow. The air inlet pipe 32 is further provided with a vacuum pressure gauge for monitoring a vacuum pressure value in the micro-nano bubble generator 33.
Further, as shown in fig. 1, a plurality of water inlet holes 21 are provided at intervals.
Preferably, the water outlet end of the micro-nano bubble generating device 3 is communicated with a water outlet diffuser. The outlet diffuser sprays the micro-nano bubbles generated by the micro-nano bubble generator 33 into the MBR membrane tank 1, and the outlet end of the outlet diffuser can be designed to be wide-mouthed so that the micro-nano bubbles act on the MBR membrane module 4, so that the spraying effect is better.
A method for efficiently cleaning an MBR membrane by micro-nano bubbles in an online maintenance manner comprises the following steps:
(1) Water in the MBR membrane tank 1 enters the water inlet tank 2 and is conveyed to the micro-nano bubble generating device 3;
(2) The gas enters the micro-nano bubble generating device 3 through negative pressure self-suction;
(3) The micro-nano bubble generating device 3 fully mixes water and gas to form micro-nano bubbles;
(4) The micro-nano bubbles are uniformly mixed into the water in the MBR membrane pool 1 to clean the MBR membrane module 4.
Further, as shown in fig. 1 to 4, in this embodiment, a specific use method of the apparatus is as follows:
(1) Water enters the water inlet tank 2 through the water inlet hole 21 and is conveyed to the micro-nano bubble generator 33 under the action of the water pump 31;
(2) The gas enters the gas inlet pipeline 32 and enters the micro-nano bubble generator 33 through negative pressure self-suction;
(3) The micro-nano bubble generator 33 fully mixes water pumped by the water pump 31 and gas introduced from the gas inlet pipeline 32, the gas rotates and flows back to form high-speed vortex in a high-vacuum state of the micro-nano bubble generator 33, and the high-speed rotation mixing is sprayed in pressurized water to form micro-nano bubbles;
(4) The micro-nano bubbles generated by the micro-nano bubble generator 33 are sprayed into the MBR membrane tank 1 through the water outlet diffuser and are uniformly mixed in water, and the effect of efficiently cleaning the MBR membrane module 4 is achieved by utilizing the characteristics of high-efficiency interfacial activity, super-strong osmosis, hydroxyl radical generation and the like.
As shown in fig. 5, the cleaning effect of the present example was verified by a specific test. After the cleaning device is applied to an MBR membrane process, transmembrane pressure difference change before and after micro-nano bubble cleaning is observed.
After the device for cleaning the MBR membrane in an efficient and green online maintenance manner is installed, the transmembrane pressure difference of the micro-nano lines is obviously reduced, and is stably kept at about 18.30KPa, which is 1-2KPa lower than that of a cleaning contrast line; after the test device runs for half a year, the transmembrane pressure difference of the micro-nano lines is still stably kept at about 18.50KPa under the trend of water quantity increase, the transmembrane pressure difference of the contrast lines is about 27KPa and is about 8.5KPa lower than that of the cleaning contrast lines, and the obvious effect of online maintainability cleaning is verified.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. The utility model provides a device of MBR membrane is washd to high-efficient green micro-nano bubble online maintainability which characterized in that includes:
the MBR membrane tank is used for accommodating all parts;
the water inlet tank is arranged inside the MBR membrane tank, and the outer wall of the water inlet tank is provided with a water inlet hole for intercepting suspended matters;
the micro-nano bubble generating device is arranged inside the water inlet tank and is used for generating micro-nano bubbles;
and the MBR membrane module is arranged inside the MBR membrane tank.
2. The device for the efficient and green online maintenance cleaning of the MBR membrane by the micro-nano bubbles according to claim 1, wherein the micro-nano bubble generating device comprises:
the water pump is arranged inside the water inlet tank and used for conveying water;
a gas inlet duct for conveying gas;
and the micro-nano bubble generator is communicated with the water outlet end of the water pump and the air outlet end of the air inlet pipeline and used for generating micro-nano bubbles.
3. The device of claim 1 for online maintenance cleaning of MBR membranes by efficient green micro-nano bubbles, which is characterized in that: the water inlet hole is provided with a grating.
4. The device of claim 2 for online maintenance cleaning of the MBR membrane by the efficient green micro-nano bubbles, which is characterized in that: and a valve is arranged on the air inlet pipeline and used for controlling the air quantity entering the micro-nano bubble generator.
5. The device of claim 2 for online maintenance cleaning of the MBR membrane by the efficient green micro-nano bubbles, which is characterized in that: the interior of the micro-nano bubble generator is in a high vacuum state.
6. The device of claim 5 for online maintenance cleaning of the MBR membrane by the efficient green micro-nano bubbles, which is characterized in that: and a vacuum pressure gauge is arranged on the air inlet pipeline and used for monitoring the vacuum pressure value in the micro-nano bubble generator.
7. The device for the efficient and green online maintenance cleaning of the MBR membrane by the micro-nano bubbles according to claim 1, is characterized in that: the inlet opening interval is provided with a plurality ofly.
8. The device of claim 1 for online maintenance cleaning of MBR membranes by efficient green micro-nano bubbles, which is characterized in that: and the water outlet end of the micro-nano bubble generating device is communicated with a water outlet diffuser.
9. A method for efficient green micro-nano bubble online maintenance cleaning of MBR (membrane bioreactor) membranes, which is based on the device of any one of claims 1-8, and is characterized by comprising the following steps:
(1) Water in the MBR membrane tank enters the water inlet tank and is conveyed to the micro-nano bubble generating device;
(2) The gas enters the micro-nano bubble generating device through negative pressure self-suction;
(3) The micro-nano bubble generating device fully mixes water and gas to form micro-nano bubbles;
(4) And uniformly mixing the micro-nano bubbles into water in the MBR membrane tank to clean the MBR membrane module.
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| CN202211157554 | 2022-09-22 |
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| CN218561206U (en) * | 2022-09-22 | 2023-03-03 | 广东汇祥环境科技有限公司 | Efficient and green device for online maintenance cleaning of MBR (membrane bioreactor) membrane by micro-nano bubbles |
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2022
- 2022-09-30 CN CN202211219554.1A patent/CN115417498A/en active Pending
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| CN202606043U (en) * | 2012-06-06 | 2012-12-19 | 北京中农天陆微纳米气泡水科技有限公司 | Membrane cleaning device suitable for immersed membrane bioreactor |
| CN203048659U (en) * | 2012-12-14 | 2013-07-10 | 蓝星环境工程有限公司 | Membrane bioreactor |
| PL424148A1 (en) * | 2017-12-31 | 2019-07-01 | Net Spółka Z Ograniczona Odpowiedzialnością Water Technologies Spółka Komandytowa | System of water treatment and the method for cleaning filtering membranes |
| CN210122541U (en) * | 2019-06-04 | 2020-03-03 | 北京中农天陆微纳米气泡水科技有限公司 | Intelligent sewage advanced treatment system based on micro-nano bubble technology |
| CN218561206U (en) * | 2022-09-22 | 2023-03-03 | 广东汇祥环境科技有限公司 | Efficient and green device for online maintenance cleaning of MBR (membrane bioreactor) membrane by micro-nano bubbles |
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