MBR sewage treatment method

Abstract

The invention discloses an MBR (Membrane Biological Reactor) sewage treatment method. The MBR sewage treatment method comprises the following steps: S1, building a floating MBR sewage treatment device on the water surface; s2, inputting the rural domestic sewage filtered by the grid into an anaerobic cavity through a water inlet pipe to decompose organic matters; s3, the upper-layer water body of the anaerobic cavity enters an MBR treatment cavity to be subjected to aeration treatment, and the aerated water body is subjected to solid-liquid separation through an MBR membrane assembly; and S4, inputting the water body subjected to solid-liquid separation treatment into a disinfection cavity for disinfection treatment, and discharging the upper-layer water body in the disinfection cavity through a water outlet pipe. The MBR sewage treatment method implemented by adopting the MBR sewage treatment device with the prefabricated module design is simple in structure and small in occupied area, can be conveniently applied to water areas such as rural rivers and ponds for floating operation, effectively treats sewage such as rural domestic sewage and aquaculture sewage, and is good in sewage treatment effect and simple in process.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly relates to an MBR sewage treatment method. Background Art

[0002] With the development of rural economy and the improvement of living standards, the discharge of rural domestic sewage has been increasing day by day. There are many problems in the application of traditional sewage treatment methods in rural areas, such as high construction costs, large floor areas, complex maintenance and management, etc. For the special geographical environment of rural rivers and pond waters, conventional sewage treatment devices are difficult to be directly and effectively installed and operated. Most of the existing MBR sewage treatment devices adopt an integral design, and when facing the scattered sewage sources in rural areas and the complex terrain of rivers and ponds, they are inconvenient to install, have poor flexibility, and are difficult to meet the needs of on-site treatment of rural domestic sewage. Summary of the Invention

[0003] The purpose of the present invention is to provide an MBR sewage treatment method implemented by an MBR sewage treatment device with a prefabricated module design, which has a simple structure and a small floor area, can be conveniently applied to float in waters such as rural rivers and ponds, effectively treat sewage such as rural domestic sewage and aquaculture sewage, and well solve the problems mentioned in the above background art.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] The present invention provides an MBR sewage treatment method, including the following steps:

[0006] S1. Build a floating MBR sewage treatment device on the water surface. The MBR sewage treatment device includes guide columns vertically fixed at the bottom of the water and a hollow cylindrical box body slidably connected to the guide columns. A buoyancy box is arranged at the bottom of the box body. The inner cavity of the box body is divided by radially distributed partition plates to form an anaerobic chamber, an MBR treatment chamber, and a disinfection chamber that are sequentially connected. The box body is provided with a water inlet pipe communicating with the middle and lower parts of the anaerobic chamber and a water outlet pipe communicating with the middle and upper parts of the disinfection chamber. An aeration device and an MBR membrane module located above the aeration device are arranged in the MBR treatment chamber;

[0007] S2. Input the rural domestic sewage filtered by the grille into the anaerobic chamber through the water inlet pipe to decompose organic substances;

[0008] S3. The upper-layer water body in the anaerobic chamber enters the MBR treatment chamber for aeration treatment, and the aerated water body passes through the MBR membrane module for solid-liquid separation;

[0009] S4. The water body after solid-liquid separation treatment is input into the disinfection chamber for disinfection treatment, and the upper-layer water body in the disinfection chamber is discharged through the water outlet pipe.

[0010] Furthermore, in step S3, the aeration volume of the aeration device is adjusted according to the sewage quality and quantity, and the dissolved oxygen concentration is controlled at 2 mg / L to 4 mg / L; the filtration pressure of the MBR membrane module is controlled at 0.1 MPa to 0.3 MPa.

[0011] Furthermore, an ultrafiltration membrane and a waterproof ultraviolet lamp tube are installed inside the disinfection chamber. The ultraviolet lamp tubes are distributed at intervals along the inner wall of the disinfection chamber, and the ultrafiltration membrane is horizontally distributed and fixed in the middle of the disinfection chamber.

[0012] Furthermore, the aeration device includes an aeration coil pipe distributed in a serpentine shape. Aeration nozzles are arranged on the side wall of the aeration coil pipe. An aeration pump is provided at the top of the box body. The aeration pump is communicated with the aeration coil pipe through a gas guide pipe; a first water guide pipe is arranged on the partition between the anaerobic chamber and the MBR treatment chamber. One end of the first water guide pipe extends into the upper part of the anaerobic chamber, and the other end of the first water guide pipe extends into the lower part of the MBR treatment chamber; a second water guide pipe is arranged between the MBR treatment chamber and the disinfection chamber. One end of the second water guide pipe is connected to the top water outlet end of the MBR membrane module, and the other end of the second water guide pipe extends into the lower part of the disinfection chamber. A first water pump is installed on the second water guide pipe; a backwash pipe is arranged between the MBR treatment chamber and the disinfection chamber. One end of the backwash pipe extends into the upper part of the disinfection chamber, and the other end of the backwash pipe is connected to the top water outlet end of the MBR membrane module. A second water pump is installed on the backwash pipe.

[0013] Furthermore, a solar power generation panel and a control device located below the solar power generation panel are installed at the top of the guide post. The solar power generation panel, the aeration pump, the ultraviolet lamp tube, the first water pump, and the second water pump are respectively electrically connected to the control device.

[0014] Furthermore, the box body and the buoyancy tank are respectively prefabricated with fiberglass. The guide post is a stainless steel rod, and a concrete pile is connected to the bottom of the guide post.

[0015] Furthermore, a plurality of manholes and covers covering the manholes are provided at the top of the box body. Each manhole is respectively communicated with the anaerobic chamber, the MBR treatment chamber, and the disinfection chamber.

[0016] Furthermore, the top side wall of the buoyancy tank is connected to the bottom side wall of the box body through a locking assembly. The locking assembly includes a fixing plate and a screw. A lower limit block is arranged on the top side wall of the buoyancy tank, and an upper limit block corresponding to the lower limit block is arranged on the bottom side wall of the box body. Limit grooves for embedding the fixing plate are respectively opened on the upper limit block and the lower limit block, and assembly holes for fitting and installing the screw are correspondingly opened on the limit grooves and the fixing plate.

[0017] Furthermore, a guiding channel is provided through the middle of the box body, and an avoidance channel coaxial with the guiding channel is provided through the middle of the buoyancy box. The guiding channel is provided with a guiding component slidably connected to the guiding column. The guiding component includes at least two guiding frames. Each guiding frame includes an inner frame body and an outer frame body distributed coaxially. A support rod is connected between the inner frame body and the outer frame body. The outer frame body is fixedly connected to the side wall of the guiding channel, and the inner frame body is slidably connected to the guiding column.

[0018] Furthermore, the cross-sectional shape of the inner frame body and the cross-sectional shape of the guiding column are rectangular.

[0019] Compared with the prior art, the present invention provides an MBR sewage treatment method, which has the following beneficial effects:

[0020] The MBR sewage treatment method implemented by the MBR sewage treatment device adopting the prefabricated module design of the present invention has a simple structure and a small floor area, and can be conveniently applied to waters such as rural rivers and ponds for floating operation, effectively treating sewage such as rural domestic sewage and aquaculture sewage, with good sewage treatment effect and simple process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 is a schematic diagram of the use of the present invention;

[0023] Figure 2 is a three-dimensional structure schematic diagram of the present invention;

[0024] Figure 3 is an assembly schematic diagram of the box body and the buoyancy box;

[0025] Figure 4 is a schematic diagram of connecting the box body and the buoyancy box by using the locking component;

[0026] Figure 5 is a three-dimensional structure schematic diagram of the guiding frame;

[0027] Figure 6 is a schematic diagram of the internal structure distribution of the box body;

[0028] Figure 7 is a schematic diagram of sewage flowing through the anaerobic chamber, the MBR treatment chamber, and the disinfection chamber in sequence.

[0029] Reference numerals: 100, MBR sewage treatment device; 1, guide post; 11, concrete pile; 2, box body; 21, partition board; 22, anaerobic chamber; 221, water inlet pipe; 23, MBR treatment chamber; 231, aeration device; 2311, aeration coil; 2312, aeration head; 2313, aeration pump; 2314, air duct; 232, MBR membrane module; 2321, water collecting pipe; 2322, resin block; 2323, PVDF hollow fiber membrane; 24, disinfection chamber; 241, water outlet pipe; 242, ultrafiltration membrane; 243, ultraviolet lamp tube; 25, first water conduit; 26, second water conduit; 261, first water pump; 27, backwash pipe; 271, second water pump; 28, manhole; 281, cover body; 29, guide channel; 3, buoyancy tank; 31, avoidance channel; 4, solar panel; 5, control device; 6, locking assembly; 61, fixing plate; 62, screw; 63, upper limit block; 64, lower limit block; 65, limit groove; 66, assembly hole; 7, guide assembly; 71, guide frame; 711, inner frame body; 712, outer frame body; 713, support rod; 200, water surface; 300, water bottom. Detailed implementation manners

[0030] The technical solutions of the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment 1

[0032] Referring to Figures 1 to 7 , this embodiment provides an MBR sewage treatment device 100, which can be built on the water surface 200 such as rivers and ponds and operate in a floating manner. Among them, the MBR sewage treatment device 100 includes a guide post 1 vertically fixed to the water bottom 300 and a box body 2 with a hollow cylindrical shape that is slidably connected to the guide post 1. A hollow buoyancy tank 3 is provided at the bottom of the box body 2. The inner cavity of the box body 2 is divided by a radially distributed partition board 21 into an anaerobic chamber 22, an MBR treatment chamber 23, and a disinfection chamber 24 that are sequentially connected. The box body 2 is provided with a water inlet pipe 221 communicating with the middle and lower parts of the anaerobic chamber 22 and a water outlet pipe 241 communicating with the middle and upper parts of the disinfection chamber 24. An aeration device 231 for supplying oxygen to the water body and an MBR membrane module 232 located above the aeration device 231 are provided in the MBR treatment chamber 23.

[0033] Specifically, referring to Figures 1 to 3 , Figure 6 and Figure 7, the aeration device 231 includes an aeration coiled pipe 2311 distributed in a serpentine bend, the side wall of the aeration coiled pipe 2311 is provided with aeration heads 2312 that jet air upward, the top of the box body 2 is provided with an aeration pump 2313, and the aeration pump 2313 is communicated with the aeration coiled pipe 2311 through a gas guide pipe 2314. A first water guide pipe 25 is arranged on the partition plate 21 between the anaerobic chamber 22 and the MBR treatment chamber 23. One end of the first water guide pipe 25 extends into the upper part of the anaerobic chamber 22, and the other end of the first water guide pipe 25 extends into the lower part of the MBR treatment chamber 23. A second water guide pipe 26 is arranged between the MBR treatment chamber 23 and the disinfection chamber 24. One end of the second water guide pipe 26 is connected to the top water outlet end of the MBR membrane module 232, and the other end of the second water guide pipe 26 extends into the lower part of the disinfection chamber 24. A first water pump 261 is installed on the second water guide pipe 26. A backwash pipe 27 is arranged between the MBR treatment chamber 23 and the disinfection chamber 24. One end of the backwash pipe 27 extends into the upper part of the disinfection chamber 24, and the other end of the backwash pipe 27 is connected to the top water outlet end of the MBR membrane module 232. A second water pump 271 is installed on the backwash pipe 27. Membrane filtration is carried out by means of water pump suction, and at the same time, the MBR membrane module is maintained by means of regular backwashing and chemical cleaning. The backwashing period is 2 to 4 hours, and the chemical cleaning period is 2 to 3 months.

[0034] As an example, such as Figure 6 and Figure 7 shown, the MBR membrane module 232 includes a water collecting pipe 2321 located above, a resin block 2322 located below, and a plurality of vertically arranged PVDF hollow fiber membranes 2323. The top of the water collecting pipe 2321 has a water outlet end. The pore diameter of the PVDF hollow fiber membrane 2323 is 0.05μm to 0.2μm, and the membrane flux is 15 to 20L / (m 2 ·h). The upper end of the PVDF hollow fiber membrane 2323 is communicated with the water collecting pipe 2321, and the lower end of the PVDF hollow fiber membrane 2323 is embedded in the resin block 2322. The use of PVDF hollow fiber membranes can effectively reduce the occurrence of membrane fouling and improve the membrane flux and service life.

[0035] Refer to Figure 6 and Figure 7 , inside the disinfection chamber 24, an ultrafiltration membrane 242 and a plurality of waterproof ultraviolet lamp tubes 243 are installed. The ultraviolet lamp tubes 243 are spaced along the inner wall of the disinfection chamber 24, and the ultrafiltration membrane 242 is horizontally distributed and fixed in the middle of the disinfection chamber 24. By irradiating with ultraviolet rays, pathogenic microorganisms such as bacteria and viruses in the water body can be killed; at the same time, the effluent quality can be further improved through ultrafiltration treatment.

[0036] In this embodiment, refer toFigures 1 to 3 , three manholes 28 are formed in the top of the box body 2, and a cover body 281 is provided to cover the manholes 28. Each manhole 28 is respectively communicated with the anaerobic chamber 22, the MBR treatment chamber 23 and the disinfection chamber 24, so as to facilitate the installation of internal structures, maintenance, and the addition of bacterial agents such as anaerobic bacteria.

[0037] In this embodiment, referring to Figure 1 and Figure 2 , a solar panel 4 and a control device 5 located below the solar panel 4 are installed at the top of the guiding column 1. The solar panel 4, the aeration pump 2313, the ultraviolet lamp tube 243, the first water pump 261, and the second water pump 271 are respectively electrically connected to the control device 5. As an example, the control device 5 includes a waterproof control box and a control unit located inside the waterproof control box. The control unit can adopt a PLC control module with programming function. In addition, the control device 5 is installed below the solar panel 4, which can avoid being exposed to sunlight and rain.

[0038] In some specific embodiments, referring to Figure 1 and Figure 2 , the box body 2 and the buoyancy tank 3 are respectively prefabricated with fiberglass. The guiding column 1 is a stainless steel rod, and a concrete pile 11 is connected to the bottom of the guiding column 1, which has good corrosion resistance and strength. Preferably, the volume ratio of the box body 2 to the buoyancy tank 3 is (0.5 - 3):1, so as to ensure sufficient buoyancy.

[0039] In some specific embodiments, referring to Figures 1 to 4 , the top side wall of the buoyancy tank 3 is connected to the bottom side wall of the box body 2 through six locking components 6. Specifically, as shown in Figure 4 , the locking component 6 includes a fixing plate 61 and a screw 62. Six lower limit blocks 64 distributed in a circumferential array are arranged on the top side wall of the buoyancy tank 3, and six upper limit blocks 63 corresponding to the lower limit blocks 64 are arranged on the bottom side wall of the box body 2. Limiting grooves 65 for installing the fixing plate 61 are respectively formed in the upper limit blocks 63 and the lower limit blocks 64, and assembly holes 66 for fitting and installing the screw 62 are correspondingly formed in the limiting grooves 65 and the fixing plate 61. Through the matching of the fixing plate and the limiting groove and the locking of the screw, the box body and the buoyancy tank can be quickly assembled and connected.

[0040] In some specific embodiments, referring to Figures 1 to 3 , Figure 5 and Figure 6, a guiding channel 29 runs through the middle of the box body 2, and an avoidance channel 31 coaxial with the guiding channel 29 runs through the middle of the buoyancy box 3. The guiding channel 29 is provided with a guiding assembly 7 slidably connected to the guiding column 1. Specifically, as Figure 5 shown, the guiding assembly 7 includes at least two guiding frames 71. Each guiding frame 71 includes an inner frame body 711 and an outer frame body 712 distributed coaxially. Four support rods 713 are connected between the inner frame body 711 and the outer frame body 712. The outer frame body 712 is fixedly connected to the side wall of the guiding channel 29. The inner frame body 711 has a sliding assembly opening slidably connected to the guiding column 1. By providing at least two guiding frames, the MBR sewage treatment device can be smoothly and stably adjusted in position in a timely manner as the water level rises and falls. At the same time, by centrally arranging the guiding channel and the avoidance channel, the stability and smoothness of the automatic lifting and position adjustment are further increased.

[0041] Preferably, as Figure 5 and Figure 6 shown, the cross-sectional shape of the inner frame body 711 and the cross-sectional shape of the guiding column 1 are rectangular.

[0042] As an improved embodiment, a sludge collection chamber (not shown in the figure) is provided at the bottom of the MBR treatment chamber 23. A sludge return pipeline (not shown in the figure) is connected between the sludge collection chamber and the anaerobic chamber 22. A sludge return pump (not shown in the figure) is installed on the sludge return pipeline. In this way, the sludge in the MBR treatment chamber can be returned to the anaerobic chamber by periodically turning on the sludge return pump to maintain the balance of sludge concentration.

[0043] Embodiment 2

[0044] This embodiment further provides an MBR sewage treatment method, which is realized by adopting the MBR sewage treatment device 100 in Embodiment 1, and includes the following steps:

[0045] S1. Referring to Figures 1 to 4 , build the floating MBR sewage treatment device 100 on the water surface 200 of rivers, ponds, etc. First, vertically fix the guiding column 1 at the bottom 300 of the water, and then hoist and float the assembled box body 2 and the buoyancy box 3 along the guiding column 1 on the water surface 200. The corrugated hoses are respectively connected to the water inlet pipe 221 and the water outlet pipe 241 on the box body 2 to realize the discharge of sewage and the discharge of the purified water body, and it can operate by automatically adjusting the position as the water level rises and falls.

[0046] S2. The rural domestic sewage first passes through facilities such as a grille to remove large-particle suspended solids and debris, and then is input into the anaerobic chamber 22 through the water inlet pipe 221 by the corrugated hose to decompose organic matter through the action of anaerobic bacteria. The dosage of the bacterial agent in the anaerobic chamber is 5 g / m3 ~10 g / m 3 。

[0047] S3. Reference Figure 6 and Figure 7 In S3, the upper water body in the anaerobic chamber 22 enters the MBR treatment chamber 23 through the first water conduit 25 for aeration treatment. Under aerobic conditions, aerobic microorganisms use oxygen to completely decompose the organic matter in the sewage into carbon dioxide and water, oxidize ammonia nitrogen into nitrate nitrogen, and absorb phosphorus at the same time. The aeration volume of the aeration device can be adjusted according to the sewage quality and quantity (for example, 50 m 3 / d, COD ≤ 8000 mg / L), so that the dissolved oxygen concentration in the MBR treatment chamber is controlled at 2 mg / L to 4 mg / L, and the pH value is 6.5 to 7.5. The aerated water body undergoes solid-liquid separation through the MBR membrane module 232, separating the mud-water mixture into clear water and concentrated sludge. Among them, the filtration pressure of the MBR membrane module should be controlled at 0.1 MPa to 0.3 MPa.

[0048] S4. The water body after solid-liquid separation is discharged from the top water outlet end of the collecting pipe 2321 through the second water conduit 26 into the lower part of the disinfection chamber 24 for disinfection treatment to kill pathogenic microorganisms such as bacteria and viruses in the water, ensuring that the effluent quality meets the conventional discharge standards or reuse requirements. The upper water body in the disinfection chamber is discharged through the water outlet pipe.

[0049] The above embodiments only exemplarily illustrate the concept and technical solutions of the present invention, rather than being used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

[0050] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A MBR sewage treatment method, characterized in that: The following steps are involved: S1. A floating MBR sewage treatment device is built on the water surface, wherein the MBR sewage treatment device comprises a guide column vertically fixed to the bottom of the water and a hollow cylindrical box body slidably connected to the guide column, a buoyancy box is arranged at the bottom of the box body, and the inner cavity of the box body is divided by radially distributed partitions to form an anaerobic chamber, an MBR treatment chamber and a disinfection chamber which are connected in sequence, the box body is provided with an inlet pipe connected to the middle and lower part of the anaerobic chamber and an outlet pipe connected to the middle and upper part of the disinfection chamber, and an aeration device and an MBR membrane assembly located above the aeration device are arranged in the MBR treatment chamber; S2, the rural domestic sewage filtered by the grille is input into the anaerobic chamber through the water inlet pipe to decompose organic matter; S3, the upper water of the anaerobic chamber enters the MBR treatment chamber for aeration treatment, and the aerated water passes through the MBR membrane assembly for solid-liquid separation; S4. The water after solid-liquid separation is input into the disinfection chamber for disinfection, and the upper layer of water in the disinfection chamber is discharged through the outlet pipe.

2. The MBR sewage treatment method according to claim 1, characterized in that: In step S3, the aeration volume of the aeration device is adjusted according to the sewage quality and water volume, and the dissolved oxygen concentration is controlled at 2 mg / L to 4 mg / L; the filtration pressure of the MBR membrane assembly is controlled at 0.1 MPa to 0.3 MPa.

3. The MBR sewage treatment method according to claim 2, characterized in that: An ultrafiltration membrane and a waterproof ultraviolet lamp are installed inside the disinfection chamber. The ultraviolet lamp is distributed at intervals along the inner wall of the disinfection chamber, and the ultrafiltration membrane is horizontally distributed and fixed in the middle of the disinfection chamber.

4. The MBR sewage treatment method according to claim 3, characterized in that: The aeration device comprises an aeration coil distributed in a serpentine shape, an aeration head is arranged on the side wall of the aeration coil, an aeration pump is arranged on the top of the box body, and the aeration pump is connected to the aeration coil through an air guide pipe; a first water guide pipe is arranged on the partition between the anaerobic chamber and the MBR treatment chamber, one end of the first water guide pipe extends into the upper part of the anaerobic chamber, and the other end of the first water guide pipe extends into the lower part of the MBR treatment chamber; a second water guide pipe is arranged between the MBR treatment chamber and the disinfection chamber, one end of the second water guide pipe is connected to the top water outlet end of the MBR membrane assembly, the other end of the second water guide pipe extends into the lower part of the disinfection chamber, and a first water pump is installed on the second water guide pipe; a backwash pipe is arranged between the MBR treatment chamber and the disinfection chamber, one end of the backwash pipe extends into the upper part of the disinfection chamber, the other end of the backwash pipe is connected to the top water outlet end of the MBR membrane assembly, and the backwash pipe is installed with a second water pump.

5. The MBR sewage treatment method according to claim 4, characterized in that: A solar panel and a control device located below the solar panel are installed on the top of the guide column. The solar panel, the aeration pump, the ultraviolet lamp, the first water pump and the second water pump are electrically connected to the control device respectively.

6. The MBR sewage treatment method according to claim 1, characterized in that: The box body and the buoyancy box are respectively prefabricated with glass fiber reinforced plastics, the guide column is a stainless steel rod, and the bottom of the guide column is connected with a concrete pile.

7. The MBR sewage treatment method according to claim 6, characterized in that: The top of the box body is provided with a plurality of manholes and covers covering the manholes, and each manhole is connected to the anaerobic chamber, the MBR treatment chamber and the disinfection chamber respectively.

8. The MBR sewage treatment method according to claim 1, characterized in that: The top side wall of the buoyancy box is connected to the bottom side wall of the box body through a locking assembly, and the locking assembly includes a fixing plate and a screw. The top side wall of the buoyancy box is provided with a lower limit block, and the bottom side wall of the box body is provided with an upper limit block corresponding to the lower limit block. The upper limit block and the lower limit block are respectively provided with limit grooves for embedding the fixing plate, and the limit grooves and the fixing plate are provided with assembly holes for adapting to the installation of the screws.

9. The MBR sewage treatment method according to claim 1, characterized in that: A guide channel is penetrated through the middle of the box body, an avoidance channel coaxially distributed with the guide channel is penetrated through the middle of the buoyancy box, and the guide channel is provided with a guide assembly slidably connected to the guide column; the guide assembly includes at least two guide frames, each guide frame includes an inner frame and an outer frame coaxially distributed, a support rod is connected between the inner frame and the outer frame, the outer frame is fixedly connected to the side wall of the guide channel, and the inner frame is slidably connected to the guide column.

10. The MBR sewage treatment method according to claim 9, characterized in that: The cross-sectional shapes of the inner frame and the guide post are rectangular.

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