CN219217721U - Membrane bioreactor capable of automatically draining water through perforated aeration pipe - Google Patents
Membrane bioreactor capable of automatically draining water through perforated aeration pipe Download PDFInfo
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- CN219217721U CN219217721U CN202320337650.XU CN202320337650U CN219217721U CN 219217721 U CN219217721 U CN 219217721U CN 202320337650 U CN202320337650 U CN 202320337650U CN 219217721 U CN219217721 U CN 219217721U
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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
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- 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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Abstract
The utility model provides a membrane bioreactor for automatically draining water from a perforated aeration pipe, which comprises a biological reaction tank and a plurality of MBR membrane components; the water outlet pipes of the MBR membrane modules are connected in parallel to a water outlet main pipe, and the water outlet main pipe further comprises a water producing module, a perforation aeration module, a micropore aeration module, a perforation aeration fan and a micropore aeration fan; the water producing assembly is communicated with the water outlet main pipe; the perforation aeration assembly comprises a perforation aeration pipe, a perforation aeration drain pipe and a perforation aeration drain valve; the tail end of the perforated aeration drain pipe extends to the upper part of the water surface of the biological reaction tank. The utility model has the advantages of strong practicability, convenient operation, low energy consumption, uniform perforation aeration and the like, avoids the problems of uneven aeration and the like caused by unsmooth drainage of a perforation aeration pipe after online backwashing of the MBR membrane assembly, reduces the problems of blocking the MBR membrane assembly by sludge, maintains the membrane flux, reduces the transmembrane pressure difference and the water production energy consumption, and prolongs the service life of the MBR membrane assembly.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a membrane bioreactor with a perforated aeration pipe for automatically draining water.
Background
With the development of urban and rural industrial and agricultural construction and civil living facility construction, the consumption of water resources is increased, and the shortage of water resources is caused, so that water conservation and water resource recycling become an important problem. In order to improve the cyclic utilization of water resources and save the water resources, people classify domestic sewage of urban and rural residents and partial industrial wastewater, and then purify and filter the domestic sewage to enable the domestic sewage to be cyclic utilized, improve the utilization rate of the water resources, relieve the shortage condition of the water resources and simultaneously achieve the purposes of preventing water pollution and protecting the environment.
Along with the development and progress of water treatment technology, the continuous development and innovation of sewage technology are promoted. In the current sewage treatment process, the MBR (membrane bioreactor: membrane bioreactor) process has the advantages of small occupied area, high automation degree, high pollutant degradation efficiency, strong impact resistance, no need of additionally constructing a secondary sedimentation tank and the like, so that the MBR process is increasingly researched and applied in the academic field and the engineering field in recent years, and the process is widely applied to the treatment of municipal sewage and various industrial waste water.
In the MBR sewage treatment process, aeration is required to be continuously carried out in the biological reaction tank, so that substances such as activated sludge and impurities are not easy to adhere to the MBR membrane component, the service life of the MBR membrane component can be prolonged, and the sewage treatment efficiency can be improved. According to different aeration intensity and modes, various flow state gas-liquid two-phase flows such as bubble flow, piston flow, tumble flow, annular flow, mist flow and the like can be generated in the biological reaction tank. In the sewage treatment process, when the gas-liquid two-phase flow generated by aeration in the biological reaction tank is a plug flow, the biological reaction tank can generate strong secondary flow, and a larger vortex area is excited, so that the material mixing of a concentration polarization layer can be better promoted, and the mass accumulation of pollutants on the membrane surface of the MBR membrane component and the excessively rapid thickening of a filter cake layer are avoided; in addition, the risk of foaming of the mixture can be reduced. Therefore, when aeration is performed in the biological reaction tank, a plug flow is generated in the biological reaction tank as much as possible. In addition, after the MBR membrane module is used for a period of time, the MBR membrane module is required to be cleaned due to adhesion and hardening of activated sludge, and the cleaning and maintenance procedures of the existing MBR membrane module are complicated, so that the replacement cost of the membrane module is relatively high, and the MBR membrane module becomes an application pain point of an MBR process. In order to prolong the offline cleaning period of the membrane assembly and further prolong the service life of the membrane assembly, an online backwashing and offline cleaning combined mode is generally adopted, and the used medicaments are sodium hypochlorite, sodium hydroxide, citric acid, oxalic acid and the like. In order to save energy consumption, when the online backwashing is started, the perforated pipe aeration fan is suspended. However, after the perforated pipe aeration fan is suspended, the air pressure in the perforated aeration pipe is reduced, and the mixed liquid enters the perforated aeration pipe. When the perforated pipe aeration fan is restarted, uneven water drainage is easy to occur to cause uneven aeration, so that activated sludge is not easy to fall off when being attached to the surface of the membrane wires, membrane pollution is aggravated, and sewage treatment efficiency is reduced.
Disclosure of Invention
The utility model provides the membrane bioreactor with the automatic drainage of the perforated aeration pipe, which has the advantages of strong practicability, convenient operation, low energy consumption and uniform perforation aeration, effectively avoids uneven perforation aeration caused by unsmooth drainage of the perforated aeration pipe after online backwashing of the MBR membrane module, reduces pollution of the MBR membrane module, maintains membrane flux, reduces transmembrane pressure difference and water production energy consumption, and prolongs the service life of the MBR membrane module; in addition, the biological reaction tank is internally provided with the combination of perforation aeration and microporous aeration, so that the gas-liquid two-phase flow in the biological reaction tank is plug flow, the mixing of materials in the biological reaction tank is promoted, the accumulation of a large amount of pollutants on the surface of a membrane and the excessively rapid thickening of a filter cake layer are avoided, and the risk of foaming of the mixed liquid is reduced.
The utility model provides a membrane bioreactor for automatically draining water from a perforated aeration pipe, which comprises a biological reaction tank and a plurality of MBR membrane components arranged in the biological reaction tank; the water producing pipes of the MBR membrane modules are connected in parallel to a water outlet main pipe, and the water producing pipe also comprises a water producing module, a perforation aeration module and a micropore aeration module which are paved below the MBR membrane modules, and a perforation aeration fan and a micropore aeration fan which are respectively communicated with the perforation aeration module and the micropore aeration module; the water producing assembly is communicated with the water outlet main pipe; the perforation aeration assembly comprises a perforation aeration pipe communicated with the perforation aeration fan, a perforation aeration drain pipe communicated with the tail end of the perforation aeration pipe and a perforation aeration drain valve arranged on the perforation aeration drain pipe; the tail end of the perforated aeration drain pipe extends to the upper part of the water surface of the biological reaction tank.
Preferably, the water producing assembly comprises a water producing pipeline communicated with the water outlet header pipe and a water producing pump for discharging water filtered by the MBR membrane assembly; the water producing pump is arranged on a water producing pipeline outside the biological reaction tank.
Preferably, the water producing pump is a centrifugal pump.
Preferably, the perforated aeration drain valve is an electric regulating valve.
Preferably, the perforated aerator pipe adopts a stainless steel pipe with the pipe diameter of DN 65.
Preferably, the perforated aeration drain pipe adopts a stainless steel pipe with the pipe diameter of DN 40.
Preferably, the microporous aeration component comprises a microporous aeration pipe communicated with the microporous aeration fan, a plurality of microporous aeration discs connected in parallel on the microporous aeration pipe and a microporous aeration regulating valve arranged on the microporous aeration pipe and used for controlling the air quantity of the microporous aeration discs.
Preferably, the perforated aeration pipe is provided with aeration holes facing away from the MBR membrane component.
Preferably, a second pressure gauge is connected in series on the perforated aeration drain pipe; the second pressure gauge is arranged in front of the perforated aeration drain valve.
Preferably, a perforated aeration adjusting valve and a first pressure gauge are sequentially connected in series on a perforated aeration pipeline which is communicated with the perforated aeration fan and the perforated aeration pipe; the perforation aeration regulating valve is close to the perforation aeration fan.
Compared with the prior art, the utility model has the advantages of strong practicability, convenient operation, low energy consumption, uniform perforation aeration and the like, and the aeration mode in the biological reaction tank combines perforation aeration and microporous aeration, so that the gas-liquid two-phase flow formed in the biological reaction tank by the gas generated after aeration is a plug flow, and the uniform plug flow generated in the biological reaction tank can generate strong secondary flow in the biological reaction tank and excite a larger vortex area, thereby better promoting the material mixing of a concentration polarization layer, avoiding the mass accumulation of pollutants on the membrane surface of an MBR membrane module and the excessively rapid thickening of a filter cake layer, delaying the membrane surface pollution of the MBR membrane module, reducing the medicine consumption in the online backwashing process of the MBR membrane module, prolonging the offline cleaning period and further prolonging the service life of membrane filaments; on the other hand, the risk of foaming of the mixed solution can be reduced, the membrane flux and the sewage treatment efficiency of the MBR membrane assembly are ensured, and the suction power of the water producing pump is reduced, so that the energy-saving effect is achieved. The tail end of the perforated aeration drain pipe provided with the perforated aeration drain valve extends to the upper part of the water surface of the biological reaction tank, so that when the MBR membrane assembly is backwashed, the perforated aeration fan pauses to work, and mixed liquid in the biological reaction tank can enter the perforated aeration pipe. When the perforated pipe aeration fan is restarted, the mixed liquid in the perforated aeration pipe can discharge water in the perforated aeration pipe through the perforated aeration drain pipe, and the perforated aeration pipe can uniformly perform aeration, so that uneven perforated aeration caused by unsmooth water discharge of the perforated aeration pipe after online backwashing of the MBR membrane module is effectively avoided, the pollution of the MBR membrane module is reduced, the membrane flux is maintained, the transmembrane pressure difference and the water production energy consumption are reduced, the service life of the MBR membrane module is prolonged, and the sewage treatment cost is saved; the aeration holes of the perforated aeration pipe are arranged to be back to the MBR membrane assembly, so that substances such as activated sludge and the like enter the perforated aeration pipe from the aeration holes when the perforated aeration pipe stops aeration, and the aeration holes are blocked to block the pipeline, so that the aeration quality is affected; the perforated aeration drain valve is an electric regulating valve, can be remotely and manually operated and automatically controlled under the condition, reduces labor intensity, is simpler, more convenient and faster to operate, and has the advantages of controllable valve opening of the electric regulating valve, adjustable drainage speed and better effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of plug flow generated by aeration.
Fig. 2 is a schematic structural view of the present utility model.
Wherein, the biological reaction tank 1; an MBR membrane module 2; a water producing component 3; a water producing pipe 31; a water producing pump 32; a perforated aeration assembly 4; perforated aeration tube 41; a perforated aeration adjustment valve 411; a first pressure gauge 412; a perforated aeration drain pipe 42; a second pressure gauge 421; a perforated aeration drain valve 43; a microporous aeration assembly 5; a microporous aerator pipe 51; a microporous aeration disc 52; a microporous aeration adjusting valve 53; a perforated aeration fan 6; and a microporous aeration fan 7.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 to 2, a membrane bioreactor for automatically draining water through a perforated aeration pipe comprises a biological reaction tank 1 and a plurality of MBR membrane components 2; the MBR membrane modules 2 are arranged in the biological reaction tank 1. Wherein, MBR membrane module can adopt the curtain type MBR membrane module of the membrane bioreactor sold in the existing market. The MBR membrane module in this embodiment adopts a curtain type MBR membrane module, wherein the outer diameter of membrane wires used in the MBR membrane module is 1.3mm. The water producing pipes of the MBR membrane modules 2 are connected in parallel, and then connected into the water outlet header pipe.
The membrane bioreactor for automatically draining the perforated aeration pipe also comprises a water production assembly 3, a perforated aeration assembly 4, a microporous aeration assembly 5, a perforated aeration fan 6 and a microporous aeration fan 7, wherein the water production assembly 3, the perforated aeration assembly 4, the microporous aeration assembly 5, the perforated aeration fan 6 and the microporous aeration fan 7 are used for draining water filtered by the MBR membrane assembly 2; the perforated aeration component 4 and the microporous aeration component 5 are paved in the biological reaction tank 1 and are positioned below the MBR membrane component 2. The water producing assembly 3 is communicated with the water outlet main pipe through a pipeline. The perforated aeration fan 6 is communicated with the perforated aeration assembly 4 through a pipeline, and air is blown into the perforated aeration assembly 4 through the perforated aeration fan 6, so that a macroporous bubble flow is formed in the biological reaction tank; the microporous aeration fan 7 is communicated with the microporous aeration assembly 5 through a pipeline, and air is blown into the microporous aeration assembly 5 through the microporous aeration fan 7, so that a microporous bubble flow is formed in the biological reaction tank. Wherein, the aeration mode in the biological reaction tank adopts the combination of perforation aeration and microporous aeration, so that the gas-liquid two-phase flow formed by the gas generated after aeration in the biological reaction tank is plug flow. The gas-liquid two-phase flow generated in the biological reaction tank is uniform plug flow, on one hand, strong secondary flow can be generated in the biological reaction tank, a larger vortex area is excited, the material mixing of a concentration polarization layer can be better promoted, the mass accumulation of pollutants on the membrane surface of an MBR membrane module and the excessively rapid thickening of a filter cake layer are avoided, the membrane surface pollution of the MBR membrane module is delayed, the medicine consumption of backwashing of the MBR membrane module is reduced, the offline cleaning period is prolonged, and the service life of membrane wires is further prolonged; on the other hand, the risk of foaming of the mixed solution can be reduced, the membrane flux and the sewage treatment efficiency of the membrane bioreactor are ensured, and the suction power of the water producing pump is reduced, so that the energy-saving effect is achieved.
The water producing assembly 3 comprises a water producing pipeline 31 communicated with the water outlet header pipe and a water producing pump 32 for discharging water filtered by the MBR membrane assembly 2; the water producing pump 32 is arranged on the water producing pipeline 31 outside the biological reaction tank 1. The water producing pump 32 is a centrifugal pump, so that the water filtered by the MBR membrane module 2 can be pumped out by the water producing pump. When online backwashing is needed after the MBR membrane assembly 2 is used for a period of time, the medicament can be pumped into the MBR membrane assembly 2 by the water pump to carry out online backwashing on the MBR membrane assembly 2, so that the pipeline layout of the membrane bioreactor is optimized, and the maintenance are convenient. The centrifugal pump described above can be used to achieve this function using existing commercially available centrifugal pumps.
Because MBR membrane module is in backwash in-process, need pause perforated pipe aeration fan, and the interior atmospheric pressure of perforation aeration pipe reduces after the perforated pipe aeration fan is paused, and the mixed liquor in the biological reaction tank can enter into perforation aeration pipe, when opening perforated pipe aeration fan again, appears the drainage unsmooth and lead to the inhomogeneous scheduling problem of aeration easily, in order to solve this problem, design and improve perforation aeration module. Wherein, the perforated aeration assembly 4 comprises a perforated aeration pipe 41, a perforated aeration drain pipe 42 and a perforated aeration drain valve 43. One end of the perforated aeration pipe 41 is communicated with the perforated aeration fan 6 through a pipeline; the other end of the perforated aeration pipe 41 communicates with one end of a perforated aeration drain pipe 42. The end of the other end of the perforated aeration drain pipe 42 extends above the water surface of the biological reaction tank so that the mixed liquid entering the perforated aeration pipe 41 can be re-discharged into the biological reaction tank, and the mixed liquid in the biological reaction tank cannot enter the perforated aeration pipe 41 from the end of the perforated aeration drain pipe 42. Wherein, the perforated aerator pipe adopts a stainless steel pipe with the pipe diameter of DN 65; the perforated aeration pipe 41 is provided with an aeration hole facing away from the MBR membrane assembly 2, so that substances such as activated sludge and the like enter the perforated aeration pipe from the aeration hole when the perforated aeration pipe stops aeration, and the aeration hole is blocked to block a pipeline, so that the aeration quality is affected. The perforated aeration drain pipe 42 adopts a stainless steel pipe with the pipe diameter of DN 40; the perforated aeration drain valve 43 is an electric control valve. The perforated aeration drain valve 43 communicates with the control system of the membrane bioreactor.
The end of the perforated aeration pipe 41 is connected with the perforated aeration drain pipe 42, when the MBR membrane module performs online backwashing, the perforated aeration fan pauses to work, mixed liquid in the biological reaction tank enters the perforated aeration pipe, when the perforated pipe aeration fan is restarted, the mixed liquid in the perforated aeration pipe can drain water in the perforated aeration pipe through the perforated aeration drain pipe, the perforated aeration pipe can uniformly perform aeration, and the problems that the perforated aeration pipe is not smoothly drained after online backwashing of the MBR membrane module, the aeration is uneven and the like are effectively avoided.
The microporous aeration assembly 5 comprises a microporous aeration pipe 51, a microporous aeration disc 52 and a microporous aeration regulating valve 53; the number of the microporous aeration discs 52 is a plurality, and the microporous aeration discs 52 are communicated in parallel. One end of the microporous aeration pipe 51 is communicated with the microporous aeration fan 7, and the other end of the microporous aeration pipe 51 is communicated with the main pipeline which is connected with the microporous aeration discs 52 in parallel. Wherein, the microporous aeration regulating valve 53 is arranged on the microporous aeration pipe 51, and the aeration air quantity of the microporous aeration disc 52 is controlled by the microporous aeration regulating valve 53.
In order to better control and regulate the pressure in the perforated aeration pipe, a second pressure gauge 421 is connected in series with the perforated aeration drain pipe 42; the second pressure gauge 421 is disposed in front of the perforated aeration drain valve 43. A perforated aeration adjusting valve 411 and a first pressure gauge 412 are sequentially connected in series on a perforated aeration pipeline which is communicated with the perforated aeration pipe 41 by the perforated aeration fan 6; wherein, the perforated aeration adjusting valve 411 is close to the perforated aeration fan 6.
When the membrane bioreactor with the perforated aeration pipe for automatically draining water works, the perforated aeration fan 6 blows air into the perforated aeration pipe 41, and the microporous aeration fan 7 blows air into the microporous aeration disc 52, so that uniform plug flow is formed in the biological reaction tank, and the water produced by the MBR membrane component 2 is drained by the water pump 32. When the MBR membrane module 2 is used for a period of time, and online backwashing is required to be carried out on the membrane surface of the MBR membrane module 2, the perforated aeration fan 6 is closed, and the medicament is pumped into the MBR membrane module 2 by the water pump to carry out backwashing and decontamination. During membrane surface cleaning of the MBR membrane module, the mixed liquid in the biological reaction tank enters the perforated aeration pipe 41 through the aeration holes due to sudden pressure drop in the perforated aeration pipe 41. When the on-line backwashing is completed and the perforated aeration fan 6 is restarted, the perforated aeration drain valve 43 may be opened to drain the mixed liquid entering the perforated aeration pipe 41 through the perforated aeration drain pipe 42. Wherein, the perforation aeration drain valve 43 adopts an electric regulating valve, and can adopt three modes of manual remote start, time-controlled automatic start and differential pressure automatic start to control the perforation aeration drain valve 43 to drain water. The specific operation of the three modes for controlling the perforated aeration pipe to drain is as follows:
1. and (5) manually and remotely starting. When on-site operators find that aeration is uneven or membrane flux fluctuation is large, the perforated aeration drain valve 43 can be manually and remotely opened, and the perforated aeration drain valve 43 can be closed after the water drainage is completed and the normal operation condition is restored;
2. and (5) time control is automatically started. According to the water production operation period of the membrane assembly, the perforated aeration drain valve 43 is automatically closed after the perforated aeration drain valve 43,5 minutes is automatically opened at intervals, and the time interval is generally 12 hours;
3. the pressure differential is automatically started. When the pressure difference deltap between the first pressure gauge 412 and the second pressure gauge 421 is greater than a certain value, the perforated aeration drain valve 43,5 is automatically opened, the perforated aeration drain valve 43 is automatically closed after the perforated aeration drain valve 43,5 is automatically opened, and when the pressure difference is automatically started twice continuously within 30 minutes, the system sends out a prompt, and manual intervention analysis and fault removal are required. Wherein, a certain numerical value is set according to the pressure value of the actual MBR membrane module, which belongs to the prior art in the field, and is not described in detail herein.
The online backwashing process of the MBR membrane module described in this embodiment may be performed by an online backwashing process commonly used in the existing membrane bioreactor, which is not described in detail herein.
While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (10)
1. The membrane bioreactor with the automatic drainage of the perforated aeration pipe comprises a biological reaction tank (1) and a plurality of MBR membrane components (2) arranged in the biological reaction tank (1); the water producing pipes of the MBR membrane modules (2) are connected in parallel to a water outlet header pipe, and the water producing pipe is characterized by further comprising a water producing module (3) for discharging water filtered by the MBR membrane modules (2), a perforated aeration module (4) and a microporous aeration module (5) which are paved below the MBR membrane modules (2), and a perforated aeration fan (6) and a microporous aeration fan (7) which are respectively communicated with the perforated aeration module (4) and the microporous aeration module (5); the water producing assembly (3) is communicated with the water outlet main pipe; the perforated aeration assembly (4) comprises a perforated aeration pipe (41) communicated with the perforated aeration fan (6), a perforated aeration drain pipe (42) communicated with the tail end of the perforated aeration pipe (41) and a perforated aeration drain valve (43) arranged on the perforated aeration drain pipe (42); the tail end of the perforated aeration drain pipe (42) extends to the upper part of the water surface of the biological reaction tank.
2. The perforated aerator pipe self-draining membrane bioreactor of claim 1, wherein: the water producing assembly (3) comprises a water producing pipeline (31) communicated with the water outlet header pipe and a water producing pump (32) for discharging water filtered by the MBR membrane assembly (2); the water producing pump (32) is arranged on a water producing pipeline (31) outside the biological reaction tank (1).
3. The perforated aerator pipe self-draining membrane bioreactor of claim 2, wherein: the water producing pump (32) is a centrifugal pump.
4. The perforated aerator pipe self-draining membrane bioreactor of claim 1, wherein: the perforated aeration drain valve (43) is an electric regulating valve.
5. The perforated aerator pipe self-draining membrane bioreactor of claim 1, wherein: the perforated aerator pipe (41) adopts a stainless steel pipe with the pipe diameter of DN 65.
6. The perforated aerator pipe self-draining membrane bioreactor of claim 1, wherein: the perforated aeration drain pipe (42) adopts a stainless steel pipe with the pipe diameter of DN 40.
7. The perforated aerator pipe automatic drainage membrane bioreactor according to any one of claims 1 to 6, wherein: the microporous aeration assembly (5) comprises a microporous aeration pipe (51) communicated with the microporous aeration fan (7), a plurality of microporous aeration discs (52) connected in parallel on the microporous aeration pipe (51) and a microporous aeration regulating valve (53) arranged on the microporous aeration pipe (51) and used for controlling the air quantity of the microporous aeration discs (52).
8. The perforated aerator pipe self-draining membrane bioreactor of claim 7, wherein: and the perforated aeration pipe (41) is provided with aeration holes back to the MBR membrane component (2).
9. The perforated aerator-pipe self-draining membrane bioreactor of claim 8, wherein: the perforated aeration drain pipe (42) is connected with a second pressure gauge (421) in series; the second pressure gauge (421) is arranged in front of the perforated aeration drain valve (43).
10. The perforated aerator pipe self-draining membrane bioreactor of claim 9, wherein: a perforated aeration adjusting valve (411) and a first pressure gauge (412) are sequentially connected in series on a perforated aeration pipeline which is communicated with the perforated aeration pipe (41) by a perforated aeration fan (6); the perforation aeration regulating valve (411) is close to the perforation aeration fan (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320337650.XU CN219217721U (en) | 2023-02-28 | 2023-02-28 | Membrane bioreactor capable of automatically draining water through perforated aeration pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320337650.XU CN219217721U (en) | 2023-02-28 | 2023-02-28 | Membrane bioreactor capable of automatically draining water through perforated aeration pipe |
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