Aeration method and device based on MABR

Abstract

The present invention provides an aeration method and device based on MABR. The aeration method based on MABR includes: controlling a first pipeline communicated with a gas supply pipeline to supply gas to a membrane module from the bottom of the membrane module; transporting the tail gas discharged from a tail gas outlet located at the top of the membrane module to a tail gas exhaust pipeline; controlling a second pipeline communicated with the tail gas exhaust pipeline to supply oxygen to the membrane module through an aeration disc; wherein, the aeration disc is connected to the second pipeline and is arranged corresponding to the bottom of the membrane module. This aeration method based on MABR can supply oxygen to the membrane module through the tail gas when the oxygen supply capacity to the membrane module is insufficient, effectively improving the utilization rate of the tail gas.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular, to an aeration method and device based on MABR. Background Art

[0002] MABR (Membrane aerated biofilm reactor) is a new type of integrated denitrification device, which has the characteristics of high oxygen transfer efficiency and counter-diffusion mass transfer, can effectively improve the treatment efficiency of biological denitrification, and reduce the aeration energy consumption. However, at present, most MABRs adopt end-open membrane modules, resulting in waste of the direct emission of their tail gas, thus increasing the high operating cost and restricting its popularization and application. Summary of the Invention

[0003] In view of the above technical problems existing in the prior art, the present invention provides an aeration method and device based on MABR, which can supply oxygen to the membrane module through the tail gas when the ability to supply oxygen to the membrane module is insufficient, effectively improving the utilization rate of the tail gas.

[0004] An embodiment of the present invention provides an aeration method based on MABR, and the aeration method includes:

[0005] Controlling a first pipeline communicating with a gas supply pipeline to supply gas to the membrane module from the bottom of the membrane module;

[0006] Transporting the tail gas discharged from the tail gas outlet at the top of the membrane module to a tail gas exhaust pipeline;

[0007] Controlling a second pipeline communicating with the tail gas exhaust pipeline to supply supplementary oxygen to the membrane module through an aeration disk; wherein, the aeration disk is connected to the second pipeline and is arranged corresponding to the bottom of the membrane module.

[0008] In some embodiments, the aeration method further includes: when the membrane module is in a first abnormal state, controlling a third pipeline to supply gas to the membrane module from the top of the membrane module and exhaust gas from the first pipeline, so that the MABR enters an upper air inlet mode for processing the first abnormal state; wherein, the third pipeline is connected in parallel with the first pipeline on the gas supply pipeline, and the third pipeline is connected to the top of the membrane module, and the first pipeline is communicated with the tail gas exhaust pipeline.

[0009] In some embodiments, the aeration method further includes: when the first pipeline communicating with the gas supply pipeline supplies gas to the membrane module from the bottom of the membrane module, enabling the tail gas of the membrane module to be discharged to the tail gas exhaust pipeline through a part of the third pipeline and a fourth pipeline in sequence, so that the MABR enters a lower air inlet mode; wherein, the third pipeline is connected to the tail gas exhaust pipeline through the fourth pipeline.

[0010] In some embodiments, the aeration method further includes: dynamically adjusting the opening degrees of the first valve group and the second valve group according to the oxygen demand of the membrane module, so as to adjust the oxygen supply amount to the membrane module through the aeration disk; wherein, the first valve group is arranged on the tail gas exhaust pipeline, the second valve group is arranged on the second pipeline, and the connection point of the second pipeline and the tail gas exhaust pipeline is located upstream of the first valve group.

[0011] In some embodiments, the aeration method further includes: controlling the third valve group and the fourth valve group to be in a linkage mode of switching between opening and closing to intermittently scour the biofilm of the membrane module; wherein, in the linkage mode, the third valve group and the fourth valve group are in different opening and closing states, the third valve group is an electric control valve group arranged on the tail gas exhaust pipeline, the fourth valve group is an electric control valve group arranged on the first pipeline, and the connection point of the second pipeline and the tail gas exhaust pipeline is located upstream of the third valve group.

[0012] In some embodiments, when the first pipeline communicating with the air supply pipeline supplies air to the membrane module from the bottom of the membrane module, the tail gas of the membrane module is discharged to the tail gas exhaust pipeline through part of the third pipeline and the fourth pipeline in sequence, so that the MABR enters the lower air intake mode. Specifically, it includes:

[0013] Controlling the fifth valve group arranged on the first pipeline to open, the sixth valve group arranged on the third pipeline to close, the seventh valve group arranged on the fourth pipeline to open, and the eighth valve group arranged on the fifth pipeline to close to enter the lower air intake mode; wherein, the connection point of the third pipeline and the fourth pipeline is located downstream of the sixth valve group; one end of the fifth pipeline is connected to the first pipeline and is located downstream of the fifth valve group, and the other end is connected to the fourth pipeline and is located downstream of the seventh valve group, and the first pipeline is communicated with the tail gas exhaust pipeline through the fifth pipeline.

[0014] In some embodiments, when the membrane module is in the first abnormal state, controlling the third pipeline to supply air to the membrane module from the top of the membrane module and exhaust air from the first pipeline, so that the MABR enters the upper air intake mode for processing the first abnormal state. Specifically, it includes: controlling the sixth valve group to open, the fifth valve group and the seventh valve group to close, and the eighth valve group arranged on the fifth pipeline to open, so that the gas discharges the tail gas to the tail gas exhaust pipeline through the first pipeline and the fifth pipeline in sequence to enter the upper air intake mode.

[0015] An embodiment of the present invention provides an aeration device based on MABR. The aeration device based on MABR includes a membrane module, a first pipeline, an aeration disk, and a controller. The tail gas outlet of the membrane module is communicated with a tail gas exhaust pipeline. The first pipeline is communicated with a gas supply pipeline and the bottom of the membrane module for supplying gas to the membrane module. The aeration disk is arranged corresponding to the bottom of the membrane module, and the aeration disk is communicated to the tail gas exhaust pipeline through a second pipeline to supplement oxygen to the membrane module through tail gas. The controller is configured to control the first pipeline to supply gas to the membrane module from the bottom of the membrane module, and control the tail gas to supplement oxygen to the membrane module through the aeration disk via the second pipeline.

[0016] In some embodiments, the aeration device based on MABR further includes a third pipeline connected in parallel with the first pipeline to the gas supply pipeline. The third pipeline is connected to the top of the membrane module. The first pipeline is communicated with the tail gas exhaust pipeline to control, in the case where the membrane module is in a first abnormal state, the third pipeline to supply gas to the membrane module from the top of the membrane module and exhaust gas from the first pipeline, so that MABR enters an upper air inlet mode for treating the first abnormal state.

[0017] In some embodiments, for the aeration device based on MABR, the third pipeline is connected to the tail gas exhaust pipeline through a fourth pipeline, so that in the case of controlling the first pipeline communicated with the gas supply pipeline to supply gas to the membrane module from the bottom of the membrane module, the tail gas of the membrane module is sequentially discharged to the tail gas exhaust pipeline through a part of the third pipeline and the fourth pipeline, so that MABR enters a lower air inlet mode.

[0018] In some embodiments, the aeration device based on MABR further includes a first valve group and a second valve group. The first valve group is arranged on the tail gas exhaust pipeline, and the second valve group is arranged on the second pipeline. The connection part of the second pipeline and the tail gas exhaust pipeline is located upstream of the first valve group to dynamically adjust the opening degrees of the first valve group and the second valve group according to the oxygen demand of the membrane module, so as to adjust the oxygen supplement amount for the membrane module through the aeration disk.

[0019] In some embodiments, the aeration device based on MABR further includes a third valve group and a fourth valve group electrically connected to the controller. The third valve group is an electric control valve group arranged on the tail gas exhaust pipeline, and the fourth valve group is an electric control valve group arranged on the first pipeline. The connection part of the second pipeline and the tail gas exhaust pipeline is located upstream of the third valve group. The controller is configured to control the third valve group and the fourth valve group to be in a linkage mode of switching between opening and closing, so as to intermittently scour the biofilm of the membrane module;

[0020] Wherein, in the linkage mode, the third valve group and the fourth valve group are in different opening and closing states.

[0021] In some embodiments, the controller is further configured to determine the intermittent flushing frequency of the biofilm according to the water quality state of the water treated by the membrane module.

[0022] In some embodiments, the aeration device based on MABR further includes a fifth valve group located on the first pipeline, a sixth valve group located on the third pipeline, a seventh valve group located on the fourth pipeline, and an eighth valve group located on the fifth pipeline. The connection point of the third pipeline and the fourth pipeline is located downstream of the sixth valve group. One end of the fifth pipeline is connected to the first pipeline and is located downstream of the fifth valve group, and the other end is connected to the fourth pipeline and is located downstream of the seventh valve group. The first pipeline is communicated with the tail gas exhaust pipeline through the fifth pipeline, so that the MABR enters the lower air intake mode by controlling the fifth valve group to open, the sixth valve group to close, the seventh valve group to open, and the eighth valve group to close.

[0023] In some embodiments, the aeration device based on MABR enters the upper air intake mode by controlling the sixth valve group and the eighth valve group to open and the fifth valve group and the seventh valve group to close, so that the gas discharges the tail gas to the tail gas exhaust pipeline through the first pipeline and the fifth pipeline in sequence.

[0024] Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows: The present invention supplies gas to the membrane module from the bottom of the membrane module through the first pipeline, and supplements oxygen to the membrane module through the second pipeline communicated with the tail gas exhaust pipeline through the aeration disk, so that the tail gas discharged from the tail gas outlet of the membrane module can be fully utilized. Especially when the ability to supply oxygen to the membrane module is insufficient, the tail gas can be used to supply oxygen to the membrane module, effectively improving the utilization rate of the tail gas. And the tail gas can also be directly discharged through the tail gas exhaust pipeline, so that the MABR has two modes: the tail gas direct discharge mode and the tail gas oxygen supplement mode, which is beneficial to reducing the operation cost of the equipment, making full use of the value of the tail gas, and improving the oxygen utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The same reference numerals with alphabetical suffixes or different alphabetical suffixes may represent different instances of similar components. The drawings generally illustrate various embodiments by way of example and not limitation, and are used together with the description and the claims to explain the disclosed embodiments. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be an exhaustive or exclusive embodiment of the device or method.

[0026] Figure 1 It is a flowchart of the aeration method based on MABR according to the embodiment of the present invention;

[0027] Figure 2 Another flowchart of the aeration method based on MABR according to an embodiment of the present invention;

[0028] Figure 3 Schematic structural diagram of the aeration device based on MABR according to an embodiment of the present invention;

[0029] Figure 4 Schematic diagram of the gas flow direction of the aeration method based on MABR according to an embodiment of the present invention. The MABR shown in the figure is in the lower air inlet mode and the tail gas direct discharge mode;

[0030] Figure 5 Schematic diagram of the gas flow direction of the aeration method based on MABR according to an embodiment of the present invention. The MABR shown in the figure is in the lower air inlet mode and the tail gas oxygen supplementation mode;

[0031] Figure 6 Schematic diagram of the gas flow direction of the aeration method based on MABR according to an embodiment of the present invention. The MABR shown in the figure is in the upper air inlet mode and the tail gas direct discharge mode.

[0032] Components indicated by the reference numerals in the figure:

[0033] 1 - Air supply pipeline; 2 - First pipeline; 201 - Fifth valve group; 3 - Membrane module; 4 - Tail gas exhaust pipeline; 401 - First valve group; 402 - Third valve group; 5 - Second pipeline; 501 - Second valve group; 502 - Fourth valve group; 6 - Aeration disk; 7 - Third pipeline; 701 - Sixth valve group; 8 - Fourth pipeline; 801 - Seventh valve group; 9 - Fifth pipeline; 901 - Eighth valve group; 10 - Recirculation equipment; 11 - Controller; 12 - Water supply pipeline; 13 - Drainage pipeline; 14 - Circulation pipeline. Detailed implementation manners

[0034] Reference is made herein to the various aspects and features of the present invention with reference to the accompanying drawings.

[0035] It should be understood that various modifications can be made to the embodiments of the invention herein. Therefore, the above description should not be regarded as limiting, but merely as an example of the embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the present invention.

[0036] The accompanying drawings, which are included in and constitute a part of this specification, illustrate embodiments of the invention and, together with the general description of the invention given above and the detailed description of the embodiments given below, serve to explain the principles of the invention.

[0037] These and other features of the present invention will become apparent from the following description of the preferred forms of the embodiments given by way of non - limiting example with reference to the accompanying drawings.

[0038] It should also be understood that although the invention has been described with reference to certain specific embodiments, those skilled in the art will readily be able to implement many other equivalent forms of the invention.

[0039] The above and other aspects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0040] Specific embodiments of the present invention will be described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments described are merely examples of the present invention, which may be implemented in a variety of ways. Well-known and / or repetitive functions and structures are not described in detail to avoid obscuring the present invention with unnecessary or redundant detail. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but rather to serve as a basis and representative basis for the claims to teach those skilled in the art to variously employ the present invention with virtually any suitable detailed structure.

[0041] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," each of which may refer to one or more of the same or different embodiments according to the present invention.

[0042] The embodiment of the present invention provides an aeration method based on MABR, such as Figure 1 and Figure 3 As shown, the aeration method includes steps S101 to S103.

[0043] Step S101 : controlling the first pipe 2 communicating with the gas supply pipe 1 to supply gas to the membrane module 3 from the bottom of the membrane module 3 .

[0044] Step S102 : transporting the tail gas discharged from the tail gas outlet located at the top of the membrane module 3 to the tail gas exhaust pipe 4 .

[0045] Step S103 : controlling the second pipe 5 connected to the tail gas exhaust pipe 4 to supply oxygen to the membrane assembly 3 through the aeration plate 6 ; wherein the aeration plate 6 is connected to the second pipe 5 and is arranged corresponding to the bottom of the membrane assembly 3 .

[0046] Specifically, the air supply pipe 1 can be connected to the air supply device to supply air to the MABR, or the air supply pipe 1 can be directly connected to the outside air. An air pump is provided on the air supply pipe 1 to directly draw the outside air into the air supply pipe 1.

[0047] Specifically, Figure 4The arrow direction in [Figure] shows the gas flow direction when the MABR is in the lower air intake mode and the tail gas direct discharge mode. When the MABR is in the lower air intake mode, gas is supplied to the membrane module 3 from the bottom through the first pipeline 2. The waste gas formed by supplying gas to the membrane module 3 can be discharged through the tail gas outlet at the upper part of the membrane module 3. At this time, the MABR is in the lower air intake mode, that is, the MABR adopts the lower air intake mode under normal operating conditions. And the tail gas is directly discharged after being discharged to the tail gas exhaust pipeline 4 through the tail gas outlet, that is, it enters the tail gas direct discharge mode of the MABR. At this time, the tail gas is not utilized.

[0048] Furthermore, the amount of oxygen in the above-mentioned tail gas decreases after aerating the membrane module 3, but the tail gas still contains some oxygen. Figure 5 The arrow direction in [Figure] shows the gas flow direction when the MABR is in the lower air intake mode and the tail gas oxygen supplementation mode. The tail gas is transported to the aeration disk 6 through the second pipeline 5 communicated with the tail gas exhaust pipeline 4. The aeration disk 6 is arranged corresponding to the bottom of the membrane module 3. Aeration is carried out at the bottom of the membrane module 3 through the aeration disk 6, so as to fully supply oxygen to the membrane module 3, that is, it enters the tail gas oxygen supplementation mode of the MABR. At this time, the tail gas is fully utilized.

[0049] Specifically, the number of the above-mentioned aeration disks 6 can be multiple, and multiple aeration disks 6 can be connected in parallel to the second pipeline 5. For example Figure 3 the number of aeration disks 6 shown in [Figure] is two, so as to increase the contact area between the aeration disk 6 and the membrane module 3, thereby further increasing the aeration efficiency of the aeration disk 6.

[0050] Specifically, an air extraction pump can be arranged on the above-mentioned tail gas exhaust pipeline 4 to facilitate the discharge of the gas in the tail gas exhaust pipeline 4 and provide an air path support for the gas flow in the pipeline.

[0051] In the present invention, gas is supplied to the membrane module 3 from the bottom of the membrane module 3 through the first pipeline 2, and oxygen is supplemented to the membrane module 3 through the second pipeline 5 communicated with the tail gas exhaust pipeline 4 through the aeration disk 6, so that the tail gas discharged from the tail gas outlet of the membrane module 3 can be fully utilized. Especially when the ability to supply oxygen to the membrane module 3 is insufficient, oxygen can be supplied to the membrane module 3 through the tail gas, effectively improving the utilization rate of the tail gas. And the tail gas can also be directly discharged through the tail gas exhaust pipeline 4, so that the MABR has two modes: the tail gas direct discharge mode and the tail gas oxygen supplementation mode, which is beneficial to reducing the operation cost of the equipment and fully utilizing the value of the tail gas and improving the oxygen utilization efficiency.

[0052] In some embodiments, such as Figure 2As shown, the aeration method further includes: when the membrane module 3 is in a first abnormal state, controlling the third pipeline 7 to supply gas to the membrane module 3 from the top of the membrane module 3 and exhaust gas from the first pipeline 2, so that the MABR enters the upper air inlet mode for dealing with the first abnormal state; wherein, as Figure 3 As shown, the third pipeline 7 is connected in parallel with the first pipeline 2 to the gas supply pipeline 1, and the third pipeline 7 is connected to the top of the membrane module 3, and the first pipeline 2 communicates with the tail gas exhaust pipeline 4. That is, the aeration method of the embodiment of the present application further includes step S104 to step S105. Step S104: Determine whether the membrane module is in a first abnormal state; Step S105: Control the third pipeline to supply gas to the membrane module from the top of the membrane module and exhaust gas from the first pipeline, so that the MABR enters the upper air inlet mode for dealing with the first abnormal state.

[0053] Specifically, the above-mentioned first abnormal state can be understood as a state in which internal water accumulation occurs in the hollow fiber membrane due to reasons such as membrane pore wetting or filament breakage. In this state, if the MABR is maintained in the lower air inlet mode, it will be difficult to drain the accumulated water in the membrane filaments, resulting in a reduction in the effective membrane area, a decrease in the membrane oxygen supply amount and the nitrogen removal effect.

[0054] Specifically, Figure 6 The arrow directions in show the gas flow directions when the MABR is in the upper air inlet mode and the tail gas direct discharge mode. When the membrane module 3 is in the first abnormal state, the third pipeline 7 connected to the top of the membrane module 3 supplies gas to the membrane module 3. The third pipeline 7 can be connected in parallel with the first pipeline 2 to the gas supply pipeline 1, or can be connected to other pipelines different from the intake pipeline, as long as it can supply gas to the third pipeline 7. By adopting the above-mentioned upper air inlet mode, the accumulated water in the membrane filaments can be drained to improve the system operation stability, and after the accumulated water is drained, that is, after the first abnormal state is eliminated, the upper air inlet mode can be switched back to the lower air inlet mode, thereby increasing the residence time of oxygen in the solution.

[0055] Specifically, as Figure 3 and Figure 6 As shown, in the above-mentioned upper air inlet mode, the tail gas discharged from the membrane module 3 can be discharged to the tail gas exhaust pipeline 4 through part of the first pipeline 2. Among them, the first pipeline 2 has a communication relationship with the tail gas exhaust pipeline 4, so that the pipeline layout can be more reasonable and each pipeline can be fully utilized in different air inlet modes. In some other embodiments, the tail gas discharged from the bottom of the membrane module 3 can also be discharged through other pipelines different from the first pipeline 2, and the other pipelines communicate with the tail gas exhaust pipeline 4.

[0056] In some embodiments, the aeration method further includes: when controlling the first pipeline 2 communicating with the air supply pipeline 1 to supply air to the membrane module 3 from the bottom of the membrane module 3, enabling the tail gas of the membrane module 3 to be discharged to the tail gas exhaust pipeline 4 through part of the third pipeline 7 and the fourth pipeline 8 in sequence, so that the MABR enters the lower air inlet mode; wherein, as Figure 3 shown, the third pipeline 7 is connected to the tail gas exhaust pipeline 4 through the fourth pipeline 8.

[0057] Specifically, as Figure 4 shown, when the MABR is in the lower air inlet mode, its tail gas is discharged from the top of the membrane module 3, that is, discharged through the third pipeline 7 connected to the top of the membrane module 3, and the third pipeline 7 transports the tail gas to the tail gas exhaust pipeline 4 through the fourth pipeline 8. A cut-off valve may be provided on the above-mentioned third pipeline 7 to prevent the tail gas from flowing to the air supply pipeline 1 through the third pipeline 7, and the connection point of the fourth pipeline 8 and the third pipeline 7 is located downstream of the cut-off valve.

[0058] In some embodiments, the aeration method further includes: dynamically adjusting the opening degrees of the first valve group 401 and the second valve group 501 according to the oxygen demand of the membrane module 3, so as to adjust the amount of supplementary oxygen supplied to the membrane module 3 through the aeration disc 6; wherein, as Figure 3 shown, the first valve group 401 is arranged on the tail gas exhaust pipeline 4, the second valve group 501 is arranged on the second pipeline 5, and the connection point of the second pipeline 5 and the tail gas exhaust pipeline 4 is located upstream of the first valve group 401.

[0059] Specifically, the above-mentioned first valve group 401 and second valve group 501 can be valve groups capable of electrically controlling the opening degree, or valves capable of manually controlling the opening degree. The above-mentioned control of the opening degree can be understood as being able to control the gas flow rate through the valve group. By controlling the opening degrees of the first valve group 401 and the second valve group 501, the amount of supplementary oxygen can be regulated, so that when the oxygen supply capacity is insufficient, the opening degrees of the first valve group 401 and the second valve group 501 can be increased to increase the amount of supplementary oxygen, and when the oxygen supply amount is excessive, the opening degrees of the first valve group 401 and the second valve group 501 can be reduced to reduce the amount of supplementary oxygen.

[0060] Specifically, the oxygen demand of the above-mentioned membrane module 3 can be determined by detecting the water quality state after the membrane module 3 processes the water, such as measuring the water quality after the membrane module 3 processes the water through a water quality detector. When it is determined that the water quality still contains more organic matter and does not meet the standard, the oxygen demand of the membrane module 3 can be increased, that is, the opening degrees of the first valve group 401 and the second valve group 501 are increased to provide more oxygen for the membrane module 3.

[0061] During the long-term operation of the MABR, the biofilm in the anaerobic zone is prone to grow too thick, resulting in an increased resistance to the mass transfer of substrates such as ammonia nitrogen in the main solution to the aerobic zone, and thus reducing the removal effects of ammonia nitrogen and total nitrogen. In some embodiments of the present application, the aeration method further includes: controlling the third valve group 402 and the fourth valve group 502 to be in a linkage mode that switches between opening and closing to intermittently scour the biofilm of the membrane module 3; wherein, in the linkage mode, the third valve group 402 and the fourth valve group 502 are in different opening and closing states, the third valve group 402 is an electrically controlled valve group provided on the tail gas exhaust pipe 4, the fourth valve group 502 is an electrically controlled valve group provided on the first pipe 2, and the connection between the second pipe 5 and the tail gas exhaust pipe 4 is located upstream of the third valve group 402 (as Figure 3 shown).

[0062] Specifically, as Figure 3 shown, the aeration device adopting the aeration method based on MABR may include a controller 11. The third valve group 402 and the fourth valve group 502 may be electrically connected to the controller 11. The controller 11 enables the third valve group 402 and the fourth valve group 502 to enter the linkage mode. In the linkage mode, the third valve group 402 is opened and the fourth valve group 502 is closed, or the third valve group 402 is closed and the fourth valve group 502 is opened. By such switching, the purpose of intermittently scouring the membrane module 3 with the tail gas can be achieved, so that the too thick biofilm of the membrane module 3 can be scoured, promoting liquid-phase mass transfer and ensuring continuous and efficient denitrification effects.

[0063] In some embodiments, the aeration method further includes: determining the intermittent scouring frequency of the biofilm according to the water quality state of the water treated by the membrane module 3.

[0064] Specifically, the water quality state of the water treated by the above-mentioned membrane module 3 can be measured by a water quality detector. Of course, the water quality can also be measured by other means. The present application does not make specific limitations thereto. When it is measured that the water quality contains more organic matters, it is determined that there may be a problem of too thick biofilm. Therefore, the intermittent scouring frequency of the biofilm can be increased to improve the denitrification effect.

[0065] In some embodiments, when controlling the first pipe 2 connected to the air supply pipe 1 to supply air to the membrane module 3 from the bottom of the membrane module 3, the tail gas of the membrane module 3 is sequentially discharged to the tail gas exhaust pipe 4 through a part of the third pipe 7 and the fourth pipe 8 to enable the MABR to enter the lower air inlet mode, which specifically includes:

[0066] Controlling the fifth valve group 201 on the first pipe 2 to be opened, the sixth valve group 701 on the third pipe 7 to be closed, the seventh valve group 801 on the fourth pipe 8 to be opened, and the eighth valve group 901 on the fifth pipe 9 to be closed to enter the lower air inlet mode; wherein, asFigure 3 As shown, the connection point of the third pipe 7 and the fourth pipe 8 is located downstream of the sixth valve group 701; one end of the fifth pipe 9 is connected to the first pipe 2 and located downstream of the fifth valve group 201, and the other end is connected to the fourth pipe 8 and located downstream of the seventh valve group 801. The first pipe 2 is communicated with the tail gas exhaust pipe 4 through the fifth pipe 9.

[0067] Specifically, when the fifth valve group 201 is opened and the sixth valve group 701 is closed, the gas provided by the gas supply pipe 1 enters the membrane module 3 through the first pipe 2, and when the seventh valve group 801 on the fourth pipe 8 is opened and the eighth valve group 901 on the fifth pipe 9 is closed, the gas enters the tail gas exhaust pipe 4 through part of the third pipe 7 and the fourth pipe 8, so as to discharge the tail gas.

[0068] In some embodiments, when the membrane module 3 is in the first abnormal state, controlling the third pipe 7 to supply gas to the membrane module 3 from the top of the membrane module 3 and exhaust gas from the first pipe 2, so that the MABR enters the upper air inlet mode for processing the first abnormal state, specifically includes:

[0069] Controlling the sixth valve group 701 to open, the fifth valve group 201 and the seventh valve group 801 to close, and the eighth valve group 901 on the fifth pipe 9 to open, so that the gas discharges the tail gas to the tail gas exhaust pipe 4 through the first pipe 2 and the fifth pipe 9 in sequence to enter the upper air inlet mode.

[0070] Specifically, when the sixth valve group 701 is opened and the fifth valve group 201 is closed, the gas provided by the gas supply pipe 1 enters the membrane module 3 through the third pipe 7, and when the eighth valve group 901 on the fifth pipe 9 is opened, the gas enters the tail gas exhaust pipe 4 through part of the first pipe 2 and the fifth pipe 9, so as to discharge the tail gas.

[0071] An embodiment of the present invention provides an aeration device based on MABR, as Figure 3 shown, the aeration device based on MABR includes a membrane module 3, a first pipe 2, an aeration disc 6 and a controller 11. The tail gas outlet of the membrane module 3 is communicated with a tail gas exhaust pipe 4. The first pipe 2 is communicated with the gas supply pipe 1 and the bottom of the membrane module 3 for supplying gas to the membrane module 3. The aeration disc 6 is arranged corresponding to the bottom of the membrane module 3, and the aeration disc 6 is communicated with the tail gas exhaust pipe 4 through a second pipe 5 to supply oxygen to the membrane module 3 through the tail gas. The controller 11 is configured to control the first pipe 2 to supply gas to the membrane module 3 from the bottom of the membrane module 3, and control the tail gas to supply oxygen to the membrane module 3 through the aeration disc 6 through the second pipe 5.

[0072] Specifically, the above-mentioned air supply pipeline 1 can be connected to an air supply device to supply air to the MABR, or the air supply pipeline 1 is directly connected to the outside air, and an air extraction pump is provided on the air supply pipeline 1 for directly pumping outside air into the air supply pipeline 1.

[0073] Specifically, Figure 4 The arrow direction in Figure 4 shows the gas flow direction when the MABR is in the lower air intake mode and the tail gas direct discharge mode. When the MABR is in the lower air intake mode, gas is supplied to the membrane module 3 from the bottom through the first pipeline 2. The waste gas formed by supplying air to the membrane module 3 can be discharged through the tail gas outlet at the upper part of the membrane module 3. At this time, the MABR is in the lower air intake mode, that is, the MABR adopts the lower air intake mode under normal operating conditions. And the tail gas can be directly discharged after being discharged to the tail gas exhaust pipeline 4 through the tail gas outlet, that is, entering the tail gas direct discharge mode of the MABR. At this time, the tail gas is not utilized.

[0074] Further, the amount of oxygen in the above-mentioned tail gas decreases after aerating the membrane module 3, but the tail gas still contains some oxygen. Figure 5 The arrow direction in Figure 5 shows the gas flow direction when the MABR is in the lower air intake mode and the tail gas oxygen supplementation mode. The tail gas is transported to the aeration disk 6 through the second pipeline 5 connected to the tail gas exhaust pipeline 4. The aeration disk 6 is arranged corresponding to the bottom of the membrane module 3, and aerates the bottom of the membrane module 3 through the aeration disk 6, so as to fully supply oxygen to the membrane module 3, that is, entering the tail gas oxygen supplementation mode of the MABR. At this time, the tail gas is fully utilized.

[0075] Specifically, the number of the above-mentioned aeration disks 6 can be multiple, and multiple aeration disks 6 can be connected in parallel to the second pipeline 5. For example, Figure 3 the number of aeration disks 6 shown in Figure 3 is two, so as to increase the contact area between the aeration disk 6 and the membrane module 3, thereby further increasing the aeration efficiency of the aeration disk 6.

[0076] Specifically, an air extraction pump can be provided on the above-mentioned tail gas exhaust pipeline 4 to facilitate the discharge of the gas in the tail gas exhaust pipeline 4 and provide an air path support for the gas flow in the pipeline.

[0077] Specifically, as Figure 3 shown, the above-mentioned aeration device based on the MABR may further include a water supply pipeline 12, a drainage pipeline 13 connected to the membrane module 3, and a circulation pipeline 14 connecting the water supply pipeline 12 and the drainage pipeline 13. A recirculation device 10 for returning part of the water discharged from the drainage pipeline 13 to the water supply pipeline 12 can be provided on the circulation pipeline 14 to realize the circulation treatment of water.

[0078] The present invention supplies gas to the membrane module 3 from the bottom of the membrane module 3 through the first pipeline 2, and supplies oxygen to the membrane module 3 through the second pipeline 5 communicated with the tail gas exhaust pipeline 4 via the aeration disc 6, so that the tail gas discharged from the tail gas outlet of the membrane module 3 can be fully utilized. Especially when the ability to supply oxygen to the membrane module 3 is insufficient, the tail gas can be used to supply oxygen to the membrane module 3, effectively improving the utilization rate of the tail gas. Moreover, the tail gas can also be directly discharged through the tail gas exhaust pipeline 4, so that the MABR has two modes: the tail gas direct discharge mode and the tail gas oxygen supply mode, which is beneficial to reducing the operation cost of the equipment and making full use of the value of the tail gas to improve the oxygen utilization efficiency.

[0079] In some embodiments, as Figure 3 shown, the aeration device based on the MABR further includes a third pipeline 7 connected in parallel with the first pipeline 2 to the gas supply pipeline 1. The third pipeline 7 is connected to the top of the membrane module 3. The first pipeline 2 is communicated with the tail gas exhaust pipeline 4 to control the third pipeline 7 to supply gas to the membrane module 3 from the top of the membrane module 3 and exhaust gas from the first pipeline 2 when the membrane module 3 is in the first abnormal state, so that the MABR enters the upper air inlet mode for treating the first abnormal state.

[0080] Specifically, the above-mentioned first abnormal state can be understood as a state where internal water accumulation occurs in the hollow fiber membrane due to reasons such as membrane pore wetting or filament breakage. In this state, if the MABR is maintained in the lower air inlet mode, it will be difficult to drain the accumulated water in the membrane filaments, resulting in a reduction in the effective membrane area and a decrease in the membrane oxygen supply amount and nitrogen removal effect.

[0081] Specifically, Figure 6 The arrow directions in

[0082] show the gas flow directions of the MABR in the upper air inlet mode and the tail gas direct discharge mode. When the membrane module 3 is in the first abnormal state, gas is supplied to the membrane module 3 through the third pipeline 7 connected to the top of the membrane module 3. The third pipeline 7 can be connected in parallel with the first pipeline 2 to the gas supply pipeline 1, or can be connected to other pipelines different from the intake pipeline, as long as it can supply gas to the third pipeline 7. By adopting the above-mentioned upper air inlet mode, the accumulated water in the membrane filaments can be drained to improve the system operation stability, and after the accumulated water is drained, it can be switched back to the lower air inlet mode, thereby increasing the residence time of oxygen in the solution. Figure 3 and Figure 6As shown, in the above upper air intake mode, the tail gas discharged from the membrane module 3 can be discharged to the tail gas exhaust pipe 4 through a part of the first pipe 2. Among them, the first pipe 2 has a connection relationship with the tail gas exhaust pipe 4, so that the pipeline layout can be more reasonable, and each pipeline can be fully utilized under different air intake modes. In some other embodiments, the tail gas discharged from the bottom of the membrane module 3 can also be discharged through other pipes, and the other pipes are different from the first pipe 2 and are connected to the tail gas exhaust pipe 4.

[0083] In some embodiments, as Figure 3 shown, for the aeration device based on MABR, the third pipe 7 is connected to the tail gas exhaust pipe 4 through the fourth pipe 8, so that when the first pipe 2 connected to the control and air supply pipe 1 supplies air to the membrane module 3 from the bottom of the membrane module 3, the tail gas of the membrane module 3 can be discharged to the tail gas exhaust pipe 4 through a part of the third pipe 7 and the fourth pipe 8 in sequence, so that MABR enters the lower air intake mode.

[0084] Specifically, as Figure 4 shown, when MABR is in the lower air intake mode, its tail gas is discharged from the top of the membrane module 3, that is, through the third pipe 7 connected to the top of the membrane module 3, and the third pipe 7 transports the tail gas to the tail gas exhaust pipe 4 through the fourth pipe 8. A cut-off valve can be provided on the above-mentioned third pipe 7 to prevent the tail gas from flowing to the air supply pipe 1 through the third pipe 7, and the connection between the fourth pipe 8 and the third pipe 7 is located downstream of the cut-off valve.

[0085] In some embodiments, as Figure 3 shown, the aeration device based on MABR further includes a first valve group 401 and a second valve group 501. The first valve group 401 is arranged on the tail gas exhaust pipe 4, and the second valve group 501 is arranged on the second pipe 5. The connection between the second pipe 5 and the tail gas exhaust pipe 4 is located upstream of the first valve group 401, so as to dynamically adjust the opening degrees of the first valve group 401 and the second valve group 501 according to the oxygen demand of the membrane module 3, thereby adjusting the oxygen supplement amount for the membrane module 3 through the aeration disc 6.

[0086] Specifically, the above-mentioned first valve group 401 and second valve group 501 can be valve groups capable of electrically controlling the opening degree, or valves capable of manually controlling the opening degree. The above-mentioned control of the opening degree can be understood as being able to control the gas flow through the valve group. By controlling the opening degrees of the first valve group 401 and the second valve group 501, the oxygen supplement amount can be adjusted. When the oxygen supply capacity is insufficient, the opening degrees of the first valve group 401 and the second valve group 501 can be increased to increase the oxygen supplement amount, and when the oxygen supply amount is excessive, the opening degrees of the first valve group 401 and the second valve group 501 can be reduced to reduce the oxygen supplement amount.

[0087] Specifically, the oxygen demand of the above-mentioned membrane module 3 can be determined by detecting the water quality state after the treatment of the membrane module 3. For example, the water quality after the treatment of the membrane module 3 is measured by a water quality detector. When it is determined that the water quality still contains a large amount of organic matter and does not meet the standard, the oxygen demand of the membrane module 3 can be increased, that is, the opening degrees of the first valve group 401 and the second valve group 501 are increased to provide more oxygen for the membrane module 3.

[0088] In some embodiments, as Figure 3 shown, the aeration device based on MABR further includes a third valve group 402 and a fourth valve group 502 electrically connected to the controller 11. The third valve group 402 is an electrically controlled valve group provided on the tail gas exhaust pipe 4, and the fourth valve group 502 is an electrically controlled valve group provided on the first pipe 2. The connection point of the second pipe 5 and the tail gas exhaust pipe 4 is located upstream of the third valve group 402. The controller 11 is configured to control the third valve group 402 and the fourth valve group 502 to be in a linkage mode that switches between opening and closing, so as to intermittently flush the biofilm of the membrane module 3; wherein, in the linkage mode, the third valve group 402 and the fourth valve group 502 are in different opening and closing states.

[0089] Specifically, the aeration device adopting the aeration method based on MABR may include a controller 11. The third valve group 402 and the fourth valve group 502 may be electrically connected to the controller 11. The controller 11 enables the third valve group 402 and the fourth valve group 502 to enter the linkage mode. In the linkage mode, the third valve group 402 is opened and the fourth valve group 502 is closed, or the third valve group 402 is closed and the fourth valve group 502 is opened. By such switching, the purpose of intermittently flushing the membrane module 3 with the tail gas can be achieved, so that the too thick biofilm of the membrane module 3 can be flushed, promoting liquid phase mass transfer and ensuring continuous and efficient denitrification effect.

[0090] In some embodiments, as Figure 3 shown, the controller 11 is further configured to: determine the intermittent flushing frequency of the biofilm according to the water quality state of the water treated by the membrane module 3.

[0091] Specifically, the water quality state of the water treated by the above-mentioned membrane module 3 can be measured by a water quality detector. Of course, the water quality can also be measured by other means, and the present application does not make specific limitations thereto. When it is measured that the water quality contains a large amount of ammonia nitrogen and organic matter, it is determined that the biofilm may have a problem of being too thick. Therefore, the intermittent flushing frequency of the biofilm can be increased to improve the denitrification effect.

[0092] In some embodiments, as Figure 3As shown in the figure, the MABR-based aeration device further includes a fifth valve group 201 located on the first pipe 2, a sixth valve group 701 located on the third pipe 7, a seventh valve group 801 located on the fourth pipe 8, and an eighth valve group 901 located on the fifth pipe 9. The connection point of the third pipe 7 and the fourth pipe 8 is located downstream of the sixth valve group 701. One end of the fifth pipe 9 is connected to the first pipe 2 and is located downstream of the fifth valve group 201, and the other end is connected to the fourth pipe 8 and is located downstream of the seventh valve group 801. The first pipe 2 is communicated with the tail gas exhaust pipe 4 through the fifth pipe 9, so that the MABR enters the lower air inlet mode by controlling the fifth valve group 201 to open, the sixth valve group 701 to close, the seventh valve group 801 to open, and the eighth valve group 901 to close.

[0093] Specifically, the opening of the fifth valve group 201 and the closing of the sixth valve group 701 enable the gas provided by the gas supply pipe 1 to enter the membrane module 3 through the first pipe 2, and through the opening of the seventh valve group 801 on the fourth pipe 8 and the closing of the eighth valve group 901 on the fifth pipe 9, the gas enters the tail gas exhaust pipe 4 through part of the third pipe 7 and the fourth pipe 8, thereby discharging the tail gas.

[0094] In some embodiments, the MABR-based aeration device controls the sixth valve group 701 and the eighth valve group 901 to open and the fifth valve group 201 and the seventh valve group 801 to close, so that the gas sequentially discharges the tail gas to the tail gas exhaust pipe 4 through the first pipe 2 and the fifth pipe 9, thereby enabling the MABR to enter the upper air inlet mode.

[0095] Specifically, the opening of the sixth valve group 701 and the closing of the fifth valve group 201 enable the gas provided by the gas supply pipe 1 to enter the membrane module 3 through the third pipe 7, and through the opening of the eighth valve group 901 on the fifth pipe 9, the gas enters the tail gas exhaust pipe 4 through part of the first pipe 2 and the fifth pipe 9, thereby discharging the tail gas.

[0096] Note that, according to various embodiments of the present application, each unit can be implemented as computer-executable instructions stored in a memory, and when executed by a processor, corresponding steps can be implemented; it can also be implemented as hardware with corresponding logical computing capabilities; it can also be implemented as a combination of software and hardware (firmware). In some embodiments, the processor can be implemented as any one of FPGA, ASIC, DSP chip, SOC (system on a chip), MPU (such as but not limited to Cortex), etc. The processor can be communicatively coupled to the memory and configured to execute the computer-executable instructions stored therein. The memory can include read-only memory (ROM), flash memory, random access memory (RAM), dynamic random access memory (DRAM) such as synchronous DRAM (SDRAM) or Rambus DRAM, static memory (e.g., flash memory, static random access memory), etc., on which computer-executable instructions are stored in any format. The computer-executable instructions can be accessed by the processor, read from the ROM or any other suitable storage location, and loaded into the RAM for the processor to execute, so as to implement the wireless communication method according to various embodiments of the present application.

[0097] It should be noted that, among the various components of the system of the present application, the components are logically divided according to the functions to be implemented. However, the present application is not limited thereto, and the components can be re-divided or combined as needed. For example, some components can be combined into a single component, or some components can be further decomposed into more sub-components.

[0098] Each component embodiment of the present application can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) can be used in practice to implement some or all of the functions of some or all of the components in the system according to the embodiments of the present application. The present application can also be implemented as a device or apparatus program (e.g., a computer program and a computer program product) for executing part or all of the methods described herein. Such a program implementing the present application can be stored on a computer-readable medium, or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form. In addition, the present application can be implemented by means of hardware including several different elements and by means of a properly programmed computer. In the unit claims listing several devices, several of these devices can be embodied by the same hardware item. The use of the words first, second, and third, etc. does not denote any order. These words can be interpreted as names.

[0099] Moreover, although exemplary embodiments have been described herein, the scope includes any and all embodiments based on the present application that have equivalent elements, modifications, omissions, combinations (e.g., schemes that cross various embodiments), adaptations, or alterations. The elements in the claims will be broadly interpreted based on the language employed in the claims and are not limited to the examples described in this specification or during the implementation of the present application, and the examples will be construed as non-exclusive. Thus, this specification and the examples are intended to be considered only as examples, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.

[0100] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more of their aspects) can be used in combination with each other. For example, other embodiments can be used by those of ordinary skill in the art upon reading the above description. Additionally, in the above detailed description, various features can be grouped together to simplify the present application. This should not be construed as an intention that any non-claimed disclosed feature is necessary for any claim. On the contrary, the subject matter of the present application can be less than all the features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, where each claim independently serves as a separate embodiment, and it is contemplated that these embodiments can be combined with each other in various combinations or permutations. The scope of the present application should be determined with reference to the appended claims and the full scope of the equivalent forms empowered by these claims.

[0101] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions within the essence and protection scope of the present application, and such modifications or equivalent substitutions should also be regarded as falling within the protection scope of the present application.

Claims

1. An aeration method based on MABR, characterized in that, The aeration method includes: Controlling a first pipe connected to a gas supply pipe to supply gas to a membrane module from the bottom of the membrane module; Transporting the tail gas discharged from the tail gas outlet at the top of the membrane module to a tail gas exhaust pipe; Controlling a second pipe connected to the tail gas exhaust pipe to supply oxygen to the membrane module through an aeration disc; wherein, the aeration disc is connected to the second pipe and is arranged corresponding to the bottom of the membrane module; wherein, The aeration method further includes: Controlling a third valve group and a fourth valve group to be in a linkage mode that switches between opening and closing to intermittently scour the biofilm of the membrane module; Wherein, in the linkage mode, the third valve group and the fourth valve group are in different opening and closing states, the third valve group is an electrically controlled valve group arranged on the tail gas exhaust pipe, the fourth valve group is an electrically controlled valve group arranged on the second pipe, and the connection point of the second pipe and the tail gas exhaust pipe is located upstream of the third valve group; The aeration method further includes: In the case where the membrane module is in a first abnormal state, controlling a third pipe to supply gas to the membrane module from the top of the membrane module and exhaust gas from the first pipe, so that the MABR enters an upper air intake mode for processing the first abnormal state; Wherein, the third pipe and the first pipe are connected in parallel to the gas supply pipe, and the third pipe is connected to the top of the membrane module, and the first pipe is connected to the tail gas exhaust pipe; The aeration method further includes: Dynamically adjusting the opening degrees of a first valve group and a second valve group according to the oxygen demand of the membrane module, so as to adjust the oxygen supply amount to the membrane module through the aeration disc; Wherein, the first valve group is arranged on the tail gas exhaust pipe, the second valve group is arranged on the second pipe, and the connection point of the second pipe and the tail gas exhaust pipe is located upstream of the first valve group.

2. The aeration method based on MABR according to claim 1, wherein The aeration method further includes: When controlling the first pipe connected to the gas supply pipe to supply gas to the membrane module from the bottom of the membrane module, enabling the tail gas of the membrane module to be discharged to the tail gas exhaust pipe through a part of the third pipe and the fourth pipe in sequence, so that the MABR enters a lower air intake mode; Wherein, the third pipe is connected to the tail gas exhaust pipe through the fourth pipe.

3. The aeration method based on MABR according to claim 1, characterized in that, The aeration method further includes: Determining the intermittent scouring frequency of the biofilm according to the water quality state of the water treated by the membrane module.

4. The aeration method based on MABR according to claim 2, characterized in that, When controlling the first pipe connected to the gas supply pipe to supply gas to the membrane module from the bottom of the membrane module, enabling the tail gas of the membrane module to be discharged to the tail gas exhaust pipe through a part of the third pipe and the fourth pipe in sequence, so that the MABR enters a lower air intake mode, specifically includes: Controlling a fifth valve group on the first pipe to open, a sixth valve group on the third pipe to close, a seventh valve group on the fourth pipe to open, and an eighth valve group on the fifth pipe to close to enter the lower air intake mode; Wherein, the connection point of the third pipe and the fourth pipe is located downstream of the sixth valve group; one end of the fifth pipe is connected to the first pipe and is located downstream of the fifth valve group, and the other end is connected to the fourth pipe and is located downstream of the seventh valve group, and the first pipe is connected to the tail gas exhaust pipe through the fifth pipe.

5. The aeration method based on MABR according to claim 4, wherein When the membrane module is in the first abnormal state, control the third pipeline to supply gas to the membrane module from the top of the membrane module and exhaust gas from the first pipeline, so that the MABR enters the upper air inlet mode for handling the first abnormal state, specifically including: Control the sixth valve group to open, the fifth valve group and the seventh valve group to close, and the eighth valve group located on the fifth pipeline to open, so that the gas discharges the tail gas to the tail gas exhaust pipeline through the first pipeline and the fifth pipeline in sequence to enter the upper air inlet mode.

6. An aeration device based on MABR, characterized in that, Including: A membrane module, the tail gas outlet of which is communicated with a tail gas exhaust pipeline; A first pipeline, which is communicated with a gas supply pipeline and the bottom of the membrane module for supplying gas to the membrane module; An aeration disc, which is arranged corresponding to the bottom of the membrane module, and the aeration disc is communicated to the tail gas exhaust pipeline through a second pipeline to supply oxygen to the membrane module through the tail gas; A controller, which is configured to control the first pipeline to supply gas to the membrane module from the bottom of the membrane module, and control the tail gas to supply oxygen to the membrane module through the aeration disc via the second pipeline; Further included are a third valve group and a fourth valve group electrically connected to the controller. The third valve group is an electrically controlled valve group arranged on the tail gas exhaust pipeline, and the fourth valve group is an electrically controlled valve group arranged on the second pipeline. The connection point of the second pipeline and the tail gas exhaust pipeline is located upstream of the third valve group. The controller is configured to control the third valve group and the fourth valve group to be in a linkage mode of switching between opening and closing, so as to intermittently scour the biofilm of the membrane module; Wherein, in the linkage mode, the third valve group and the fourth valve group are in different opening and closing states; Further included is a third pipeline connected in parallel with the first pipeline to the gas supply pipeline. The third pipeline is connected to the top of the membrane module, and the first pipeline is communicated with the tail gas exhaust pipeline. In the case that the membrane module is in the first abnormal state, control the third pipeline to supply gas to the membrane module from the top of the membrane module and exhaust gas from the first pipeline, so that the MABR enters the upper air inlet mode for handling the first abnormal state; Further included are a first valve group and a second valve group. The first valve group is arranged on the tail gas exhaust pipeline, and the second valve group is arranged on the second pipeline. The connection point of the second pipeline and the tail gas exhaust pipeline is located upstream of the first valve group to dynamically adjust the opening degrees of the first valve group and the second valve group according to the oxygen demand of the membrane module, so as to adjust the oxygen supply amount to the membrane module through the aeration disc.

7. The aeration device based on MABR according to claim 6, characterized in that, The third pipeline is connected to the tail gas exhaust pipeline through a fourth pipeline. In the case that the first pipeline connected to the gas supply pipeline supplies gas to the membrane module from the bottom of the membrane module, the tail gas of the membrane module is discharged to the tail gas exhaust pipeline through part of the third pipeline and the fourth pipeline in sequence, so that the MABR enters the lower air inlet mode.

8. The aeration device based on MABR according to claim 6, characterized in that, The controller is further configured to: determine the intermittent scouring frequency of the biofilm according to the water quality state of the water treated by the membrane module.

9. The MABR-based aeration device according to claim 7, characterized in that, It further includes a fifth valve group located on the first pipeline, a sixth valve group located on the third pipeline, a seventh valve group located on the fourth pipeline, and an eighth valve group located on the fifth pipeline. The connection point between the third pipeline and the fourth pipeline is downstream of the sixth valve group. One end of the fifth pipeline is connected to the first pipeline and is downstream of the fifth valve group, and the other end is connected to the fourth pipeline and is downstream of the seventh valve group. The first pipeline is communicated with the tail gas exhaust pipeline through the fifth pipeline, so that the MABR enters the lower air intake mode by controlling the fifth valve group to open, the sixth valve group to close, the seventh valve group to open, and the eighth valve group to close.

10. The aeration device based on MABR according to claim 9, characterized in that, The MABR-based aeration device enters the upper air intake mode by controlling the sixth valve group and the eighth valve group to open and the fifth valve group and the seventh valve group to close, so that the gas discharges the tail gas to the tail gas exhaust pipeline through the first pipeline and the fifth pipeline in sequence.

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