Improved biological membrane method MABR sewage treatment device

Abstract

The application belongs to the technical field of sewage treatment, and particularly relates to a modified biological membrane method MABR sewage treatment device, which comprises a MABR biological membrane, a sedimentation tank, a discharge port, a cleaning assembly and a power assembly, the MABR biological membrane is arranged in the sedimentation tank, the discharge port is arranged at the bottom end of the sedimentation tank, the cleaning assembly comprises a moving plate and a filter barrel, the moving plate is slidingly installed in the inside of the sedimentation tank, the outer wall of the moving plate is attached to the inner wall of the sedimentation tank, the filter barrel is provided with an opening, and the filter barrel is arranged on the opening; the filter barrel is driven to slide by the moving plate, so that the sediments can be pushed to one side of the sedimentation tank; the sliding of the cleaning assembly is controlled by the power assembly; the end of the moving plate, which is away from the filter barrel, is slidingly installed with a first baffle and a second baffle; the first baffle and the second baffle are controlled to slide relative to each other; and the above structure can effectively improve the efficiency of sewage treatment.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically a modified biofilm bioreactor (MABR) wastewater treatment device. Background Technology

[0002] MABR (Membrane Aerated Biofilm Reactor) wastewater treatment is a novel wastewater treatment technology that integrates gas separation membrane technology and MABR biofilm water treatment technology. In this technology, a microbial membrane is attached and grows on the surface of an oxygen-permeable hollow fiber membrane. When wastewater flows around the hollow fiber membrane, pollutants in the water enter the MABR biofilm under the influence of concentration gradient and microbial adsorption. Through biological metabolism and proliferation, these pollutants are utilized by microorganisms, assimilated into microbial cells, fixed on the MABR biofilm, or decomposed into inorganic metabolites, thereby achieving water purification and recycling.

[0003] Chinese Patent Publication CN212102165: An improved biofilm wastewater treatment system, comprising a frame and a linear screw motor. The frame houses a sedimentation tank with a guide rod inside. A discharge port is installed on one side of the sedimentation tank. A stainless steel mesh plate is installed in the middle of the sedimentation tank, and a connecting sleeve is installed above the mesh plate. A screw rod passes through the middle of the connecting sleeve, and a feeding frame is installed above the screw rod. An adjusting hydraulic cylinder is installed inside the feeding frame, and a baffle is installed on one side of the adjusting hydraulic cylinder. This improved biofilm wastewater treatment system, equipped with a linear screw motor and a screw rod, effectively moves the sediment accumulated on the inner wall of the sedimentation tank through the screw rod, pushing the sediment out of the sedimentation tank through the discharge port, thus effectively improving the efficiency of sediment removal.

[0004] However, the aforementioned technologies often have the following drawbacks: As biofilm fouling intensifies, the performance of the entire wastewater treatment system will be severely affected, treatment capacity will decrease, effluent quality may fail to meet standards, and the system may even malfunction. While adjusting the displacement of the stainless steel mesh plate within the sedimentation tank towards the discharge outlet can indeed achieve sediment discharge, in practical applications, the stainless steel mesh plate is mostly stationary, only moving when necessary. Therefore, sediment easily adheres to the mesh plate and gradually clogs the mesh openings. This significantly reduces the filtration efficiency of the mesh plate during movement. If wastewater at the other end of the mesh plate cannot pass through, the wastewater level in the sedimentation tank will rise, posing a risk of overflow.

[0005] Therefore, the present invention provides an improved biofilm-based MABR wastewater treatment device. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides an improved biofilm-based MABR wastewater treatment device, which includes a MABR biofilm, a sedimentation tank, an outlet, a cleaning component, and a power component. The MABR biofilm is installed in the sedimentation tank, and the outlet is located at the bottom of the sedimentation tank.

[0008] The cleaning assembly includes a movable plate and a filter barrel. The movable plate is slidably installed inside the sedimentation tank, and the outer wall of the movable plate is in contact with the inner wall of the sedimentation tank. The filter barrel has an opening and is set on the opening. The movable plate drives the filter barrel to slide, which can push the sediment to one side of the sedimentation tank. The sliding of the cleaning assembly is controlled by a power assembly.

[0009] The filter bucket is positioned near the outlet of the moving plate. When the moving plate is controlled to move the filter bucket toward the outlet, the sewage on the right side of the moving plate can pass through the holes on the filter bucket and flow to the left side of the moving plate. At this time, the sediment in the sewage will be filtered by the holes on the filter bucket and placed on the right side of the moving plate. As the moving plate moves toward the right, the sediment can be collected and finally discharged through the outlet.

[0010] The first baffle and the second baffle are slidably installed at the end of the movable plate away from the filter tank. By controlling the relative sliding of the first baffle and the second baffle, the opening on the movable plate can be blocked. At this time, the movable plate can divide the interior of the sedimentation tank.

[0011] When the moving plate pushes the sediment to the outlet, the first and second baffles slide relative to each other to block the opening on the filter bucket. At this time, the outlet is opened, and the sewage and sediment located on the right side of the moving plate can be discharged. Furthermore, the cooperation of the first and second baffles can prevent sewage leakage from the left side of the moving plate, further improving the sediment discharge effect.

[0012] The power assembly includes a drive motor and a threaded rod. The drive motor is fixedly installed on the side wall of the sedimentation tank, and the threaded rod is installed on the top of the sedimentation tank through a mounting bracket. The moving plate is connected to the threaded rod through threads.

[0013] By controlling the rotation of the drive motor to rotate the threaded rod, the sliding of the moving plate in the sedimentation tank can be controlled.

[0014] The movable plate has a sliding groove, and a slider is fixedly installed at one end of the first baffle and the second baffle, extending into the interior of the sliding groove.

[0015] The sliding trajectory of the first baffle and the second baffle can be limited by the cooperation of the slider and the sliding groove, so as to avoid the first baffle and the second baffle from deviating when sliding.

[0016] A first tension spring is fixedly installed at the top of the slider on the first baffle, and a second tension spring is fixedly connected to the bottom of the slider on the second baffle.

[0017] When the first baffle and the second baffle are in contact, both the first tension spring and the second tension spring are in a stretched state.

[0018] The first tension spring ensures that the first baffle is always at the top of the moving plate, and the second tension spring ensures that the second baffle is always at the bottom of the moving plate, thus maintaining a tendency for the first and second baffles to separate.

[0019] Guide blocks are slidably installed on both sides of the first and second baffles, and a third tension spring is fixedly connected to the end of the guide block away from the sedimentation tank.

[0020] When the guide block is inside the first baffle or the second baffle, the third tension spring is in a compressed state.

[0021] The inner wall of the sedimentation tank is provided with guide grooves that cooperate with the guide blocks. The number of guide grooves is the same as that of the guide blocks. By having the first baffle and the second baffle simultaneously drive the guide blocks to slide inside the guide grooves toward the discharge outlet, the first baffle and the second baffle can slide relative to each other.

[0022] Two guide blocks are provided on both sides of the first baffle, and two guide blocks are provided on both sides of the second baffle. The two guide grooves that fit with the first baffle are inclined, with the lowest end facing the outlet. The guide grooves that cooperate with the guide blocks on the second baffle are also inclined, with the highest end facing the outlet.

[0023] When the guide blocks on the first and second baffles slide to the right in their corresponding guide grooves, the first and second baffles can slide relative to each other on the outer wall of the moving plate. Conversely, sliding to the left will cause them to move away from each other.

[0024] The third tension spring always controls the guide block to be inside the first baffle or the second baffle. When the guide block is inside the first baffle or the second baffle, the first tension spring can place the first baffle at the top, and the second tension spring can place the second baffle at the bottom.

[0025] The outer wall of the sedimentation tank is fixedly connected with magnetic strips, and the magnetic strips are positioned to correspond to the guide grooves, so that the guide blocks can be attracted by magnetic force.

[0026] The length of the magnetic strip is shorter than the length of the guide groove. When the first and second baffles move to the corresponding guide grooves, the magnetic strips can attract the guide block, causing it to extend into the guide groove. When the moving plate slides to the left, the first and second baffles will drive the guide block to slide to the left within the guide groove. When it slides to the end, the shorter magnetic strip can no longer attract the guide block, and the guide block will retract back into the first and second baffles under the action of the third tension spring, without affecting the normal leftward sliding of the moving plate.

[0027] The sedimentation tank is equipped with fixed flow guide blocks.

[0028] The guide blocks facilitate the discharge of wastewater and sediment from the outlet.

[0029] An installation ring is provided in the opening of the movable plate. One end of the filter barrel extends into the interior of the installation ring and is rotatably connected. A water turbine blade is fixedly installed inside the installation ring. A connecting rod is fixedly connected to the water turbine blade. The other end of the connecting rod is fixedly connected to the interior of the filter barrel.

[0030] By controlling the sliding plate within the sedimentation tank, the water flow through the mounting ring drives the water turbine blades to rotate, which in turn drives the filter barrel to rotate under the action of the connecting rod.

[0031] When the moving plate moves to the right, the water flow impacts the water impeller blades through the filter barrel, causing it to rotate. This, in turn, drives the filter barrel connected to the connecting rod to rotate. The same principle applies when the moving plate moves to the left. The rotating filter barrel can shake off the sediment attached to the outer wall, reducing the risk of filter barrel clogging.

[0032] A scraper is fixedly connected to the end of the movable plate away from the first baffle, and one end of the scraper is in contact with the outer wall of the filter barrel.

[0033] When the filter barrel rotates, the outer wall of the barrel comes into contact with the scraper strips. The scraper strips can then be used to scrape off the sediment adhering to the outer wall of the barrel.

[0034] The beneficial effects of this invention are as follows:

[0035] 1. The improved biofilm bioreactor (MABR) wastewater treatment device of the present invention uses a drive motor to control the movement of a moving plate. Guide blocks set on the first and second baffles enter the interior of the guide groove and slide under the action of magnetic strips. As the moving plate moves to the right, the first and second baffles slide relative to each other, blocking the opening on the filter tank. Finally, the wastewater is discharged by opening the outlet, which can effectively improve the discharge effect of wastewater and sediment.

[0036] 2. The improved MABR wastewater treatment device of the present invention uses a moving plate to cause water flow to impact the impeller blades, causing them to rotate. This rotation drives the filter barrel connected to the connecting rod to rotate. The scraper strips can scrape off the sediment attached to the outer wall of the barrel, thus cleaning the filter barrel and improving its service life and filtration efficiency. Attached Figure Description

[0037] The invention will now be further described with reference to the accompanying drawings.

[0038] Figure 1 This is a perspective view of the present invention;

[0039] Figure 2 This is a schematic diagram of the sedimentation tank in this invention;

[0040] Figure 3 This is a cross-sectional view of the sedimentation tank in this invention;

[0041] Figure 4 This is a schematic diagram of the first baffle and the second baffle being attached in this invention;

[0042] Figure 5 In this invention Figure 4 Enlarged view of point A in the image;

[0043] Figure 6 This is a schematic diagram of the filter barrel in this invention;

[0044] Figure 7 In this invention Figure 6 Enlarged view of section B in the middle.

[0045] In the diagram: 1. Sedimentation tank; 2. Drive motor; 3. Threaded rod; 4. Guide block; 5. Guide groove; 6. Magnetic strip; 7. Moving plate; 8. First baffle; 9. Filter barrel; 10. Discharge port; 11. Second baffle; 12. Water impeller; 13. Mounting ring; 14. Guide block; 15. Sliding groove; 16. First tension spring; 17. Sliding block; 18. Connecting rod; 19. Scraper; 20. Third tension spring; 21. MABR biofilm. Detailed Implementation

[0046] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0047] Example 1: As Figures 1 to 5As shown in the figure, an improved biofilm-based MABR wastewater treatment device according to an embodiment of the present invention includes a MABR biofilm 21, a sedimentation tank 1, an outlet 10, a cleaning component, and a power component. The MABR biofilm 21 is disposed in the sedimentation tank 1, and the outlet 10 is located at the bottom of the sedimentation tank 1.

[0048] Wastewater entering sedimentation tank 1 passes through the MABR biofilm 21, where microorganisms attach to its surface. As the wastewater flows through the MABR biofilm 21, pollutants are decomposed through the adsorption of organic nutrients, the diffusion of oxygen into the MABR biofilm 21, and biological oxidation that occurs within the membrane, thereby achieving the effect of wastewater purification.

[0049] Suspended solids, particles, and colloidal substances in the feed water will be trapped on the membrane surface and within the membrane pores. In particular, macromolecules such as proteins will be adsorbed on the membrane surface and within the membrane pores to form MABR biofilm 21. As MABR biofilm 21 ages, decomposed proteins, nucleic acids, polysaccharides, lipids, and other macromolecules may be released into the water. These substances may react with other components in the water to form precipitates (the steel structure frame of MABR biofilm 21 in this scheme is made of SS304 square tubing).

[0050] Pollutants in the water enter the MABR biofilm 21 under the influence of concentration gradient and microbial adsorption. Through biological metabolism and proliferation, they are utilized by microorganisms, which assimilate the pollutants in the water into microbial cells that are fixed on the MABR biofilm 21 or decompose them into inorganic metabolites, thereby purifying the water. This is an artificially enhanced ecological water treatment technology.

[0051] Due to the attachment and growth of microorganisms, the hydraulic retention time and biological retention time can be independently controlled. The microorganisms on the MABR biofilm 21 will not be lost with the water flow, and the sludge retention time can theoretically be considered infinitely long. This provides the possibility for the growth and enrichment of microorganisms with long generation times and slow proliferation rates, such as nitrifying bacteria, denitrifying bacteria, polyphosphate-accumulating bacteria, and anaerobic ammonia-oxidizing bacteria. At the same time, the layered structure of the MABR biofilm 21 can create the simultaneous occurrence of aerobic and anaerobic processes, making it possible to achieve simultaneous nitrification and denitrification processes in a single reactor.

[0052] The cleaning assembly includes a movable plate 7 and a filter barrel 9. The movable plate 7 is slidably installed inside the sedimentation tank 1, and the outer wall of the movable plate 7 is in contact with the inner wall of the sedimentation tank 1. The filter barrel 9 has an opening and is set on the opening. The movable plate 7 drives the filter barrel 9 to slide, which can push the sediment to one side of the sedimentation tank 1. The sliding of the cleaning assembly is controlled by the power assembly.

[0053] As membrane fouling intensifies, the performance of the entire wastewater treatment system will be severely affected, treatment capacity will decrease, effluent quality may fail to meet standards, and the system may even malfunction. Therefore, the cleaning components installed inside the sedimentation tank 1 can remove sediment from the wastewater, thereby improving the wastewater treatment effect.

[0054] The filter bucket 9 is positioned near the outlet 10 of the movable plate 7. When the movable plate 7 moves the filter bucket 9 toward the outlet 10 (to the right), the sewage on the right side of the movable plate 7 can pass through the holes on the filter bucket 9 and flow to the left side of the movable plate 7. At this time, the sediment in the sewage will be filtered by the holes on the filter bucket 9 and placed on the right side of the movable plate 7. As the movable plate 7 moves to the right, the sediment can be collected and finally discharged through the outlet 10.

[0055] The first baffle 8 and the second baffle 11 are slidably installed on the end of the movable plate 7 away from the filter tank 9. By controlling the relative sliding of the first baffle 8 and the second baffle 11, the opening on the movable plate 7 can be blocked. At this time, the movable plate 7 can divide the interior of the sedimentation tank 1.

[0056] When the moving plate 7 pushes the sediment to the outlet 10, the first baffle 8 and the second baffle 11 are controlled to slide relative to each other, blocking the opening on the filter bucket 9. At this time, the outlet 10 is opened, and the sewage and sediment located on the right side of the moving plate 7 can be discharged. Furthermore, through the cooperation of the first baffle 8 and the second baffle 11, the leakage of sewage on the left side of the moving plate 7 can be prevented, further improving the effect of sediment discharge.

[0057] The power assembly includes a drive motor 2 and a threaded rod 3. The drive motor 2 is fixedly installed on the side wall of the sedimentation tank 1, and the threaded rod 3 is installed on the top of the sedimentation tank 1 through a mounting base. The moving plate 7 is connected to the threaded rod 3 through threads.

[0058] By controlling the rotation of the drive motor 2 to drive the threaded rod 3 to rotate, the sliding of the moving plate 7 in the sedimentation tank 1 can be controlled.

[0059] The movable plate 7 has a sliding groove 15, and a slider 17 is fixedly installed at one end of the first baffle 8 and the second baffle 11 and extends into the sliding groove 15.

[0060] The sliding trajectory of the first baffle 8 and the second baffle 11 can be limited by the cooperation of the slider 17 and the sliding groove 15, so as to avoid the first baffle 8 and the second baffle 11 from deviating when sliding.

[0061] A first tension spring 16 is fixedly installed at the top of the slider 17 on the first baffle 8, and a second tension spring is fixedly connected to the bottom of the slider 17 on the second baffle 11.

[0062] When the first baffle 8 and the second baffle 11 are in contact, both the first tension spring 16 and the second tension spring are in a stretched state.

[0063] The first tension spring 16 ensures that the first baffle 8 is always at the top of the moving plate 7, and the second tension spring ensures that the second baffle 11 is always at the bottom of the moving plate 7, so that the first baffle 8 and the second baffle 11 always tend to be separated.

[0064] Guide blocks 14 are slidably installed on both sides of the first baffle 8 and the second baffle 11. A third tension spring 20 is fixedly connected to the end of the guide block 14 away from the sedimentation tank 1.

[0065] When the guide block 14 is located inside the first baffle 8 or the second baffle 11, the third tension spring 20 is in a compressed state.

[0066] The inner wall of the sedimentation tank 1 is provided with guide grooves 5 that cooperate with guide blocks 14. The number of guide grooves 5 is the same as that of guide blocks 14. By having the first baffle 8 and the second baffle 11 simultaneously drive the guide blocks 14 to slide inside the guide grooves 5 toward the outlet 10, the first baffle 8 and the second baffle 11 can slide relative to each other.

[0067] Two guide blocks 14 are provided on both sides of the first baffle 8, and two guide blocks 14 are provided on both sides of the second baffle 11. The two guide grooves 5 that are adapted to the first baffle 8 are inclined, with the lowest end facing the outlet 10. The guide grooves 5 that cooperate with the guide blocks 14 on the second baffle 11 are also inclined, with the highest end facing the outlet 10.

[0068] When the guide blocks 14 on the first baffle 8 and the second baffle 11 slide to the right in the corresponding guide grooves 5, the first baffle 8 and the second baffle 11 can slide relative to each other on the outer wall of the moving plate 7. Conversely, sliding to the left will cause them to move away from each other.

[0069] The third tension spring 20 always controls the guide block 14 to be located inside the first baffle 8 or the second baffle 11. When the guide block 14 is located inside the first baffle 8 or the second baffle 11, the first baffle 8 can be placed at the top by the first tension spring 16, and the second tension spring can place the second baffle 11 at the bottom.

[0070] A magnetic strip 6 is fixedly connected to the outer wall of the sedimentation tank 1. The magnetic strip 6 is positioned to correspond to the guide groove 5, and the guide block 14 can be attracted by magnetic force.

[0071] The length of the magnetic strip 6 is shorter than the length of the guide groove 5. When the first baffle 8 and the second baffle 11 move to the corresponding guide groove 5, the magnetic strip 6 can attract the guide block 14, causing the guide block 14 to extend into the interior of the guide groove 5 (the magnetic force is greater than the elastic force of the third tension spring 20). When the moving plate 7 slides to the left, the first baffle 8 and the second baffle 11 will drive the guide block 14 to slide to the left in the guide groove 5. When it slides to the end, the shorter magnetic strip 6 can no longer attract the guide block 14, and the guide block 14 will retract back into the interior of the first baffle 8 and the second baffle 11 under the action of the third tension spring 20, without affecting the normal sliding of the moving plate 7 to the left.

[0072] A flow guide block 4 is fixedly installed inside the sedimentation tank 1.

[0073] The guide block 4 facilitates the discharge of sewage and sediment from the outlet 10.

[0074] Example 2: Figures 6 to 7 As shown in Example 1, another embodiment of the present invention is as follows:

[0075] An installation ring 13 is provided in the opening of the movable plate 7. One end of the filter barrel 9 extends into the interior of the installation ring 13 and is rotatably connected. A water turbine blade 12 is fixedly installed inside the installation ring 13. A connecting rod 18 is fixedly connected to the water turbine blade 12. The other end of the connecting rod 18 is fixedly connected to the interior of the filter barrel 9.

[0076] By controlling the sliding plate 7 within the sedimentation tank 1, the water flow through the mounting ring 13 drives the water turbine blade 12 to rotate, and under the action of the connecting rod 18, it drives the filter barrel 9 to rotate.

[0077] When the moving plate 7 moves to the right, the water flow impacts the water wheel blade 12 through the filter barrel 9, causing it to rotate. At the same time, it drives the filter barrel 9 connected to the connecting rod 18 to rotate. The same applies when the moving plate 7 moves to the left. The rotating filter barrel 9 can shake off the sediment attached to the outer wall, reducing the risk of filter barrel 9 clogging.

[0078] A scraper 19 is fixedly connected to the end of the movable plate 7 away from the first baffle 8, and one end of the scraper 19 is in contact with the outer wall of the filter barrel 9.

[0079] When the filter barrel 9 rotates, the outer wall of the barrel will come into contact with the scraper 19. The scraper 19 can scrape off the sediment attached to the outer wall of the barrel.

[0080] Working principle: The drive motor 2 controls the moving plate 7 to move the filter barrel 9 to the right. The sewage located on the right side of the moving plate 7 can penetrate the holes on the filter barrel 9 and flow to the left side of the moving plate 7. At this time, the guide block 14 set on the first baffle 8 and the second baffle 11 enters the interior of the guide groove 5 and slides under the action of the magnetic strip 6. As the moving plate 7 moves to the right, the first baffle 8 and the second baffle 11 slide relative to each other, blocking the opening on the filter barrel 9, and finally discharged through the outlet 10.

[0081] When the moving plate 7 moves, the water flow impacts the water wheel blade 12, causing it to rotate. At the same time, it drives the filter barrel 9 connected to the connecting rod 18 to rotate. The scraper 19 can scrape off the sediment attached to the outer wall of the barrel, thus cleaning the filter barrel 9.

[0082] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0083] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0084] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modified biological membrane process (MABR) wastewater treatment device, characterized in that: Including MABR biofilm (21), sedimentation tank (1), discharge port (10), cleaning assembly and power assembly, the MABR biofilm (21) is arranged in the sedimentation tank (1), the discharge port (10) is opened in the bottom end of the sedimentation tank (1); The cleaning assembly includes a moving plate (7) and a filter bucket (9), the moving plate (7) is slidably installed in the interior of the sedimentation tank (1), the outer wall of the moving plate (7) is attached to the inner wall of the sedimentation tank (1), the filter bucket (9) is provided with a through opening, the filter bucket (9) is arranged on the through opening, the filter bucket (9) is slidably driven by the moving plate (7), so that the sediment can be pushed to one side of the sedimentation tank (1), the sliding of the cleaning assembly is controlled by the power assembly; The end of the moving plate (7) away from the filter bucket (9) is slidably provided with a first baffle (8) and a second baffle (11), the through opening on the moving plate (7) can be blocked by controlling the relative sliding of the first baffle (8) and the second baffle (11), at this time, the moving plate (7) can separate the interior of the sedimentation tank (1); The power assembly includes a driving motor (2) and a threaded rod (3), the driving motor (2) is fixedly installed on the side wall of the sedimentation tank (1), the threaded rod (3) is installed on the top end of the sedimentation tank (1) through a mounting seat, and the moving plate (7) is connected with the threaded rod (3) through threads; The moving plate (7) is provided with a sliding groove (15), and one end of the first baffle (8) and the second baffle (11) is fixedly installed with a sliding block (17) and extends into the interior of the sliding groove (15); The top end of the sliding block (17) on the first baffle (8) is fixedly installed with a first extension spring (16), and the bottom end of the sliding block (17) on the second baffle (11) is fixedly connected with a second extension spring; When the first baffle (8) and the second baffle (11) are attached, the first extension spring (16) and the second extension spring are in a stretched state at this time; The two sides of the first baffle (8) and the second baffle (11) are slidably provided with guide blocks (14), and one end of the guide block (14) away from the sedimentation tank (1) is fixedly connected with a third extension spring (20); When the guide block (14) is located in the interior of the first baffle (8) or the second baffle (11), the third extension spring (20) is in a compressed state at this time; The inner wall of the sedimentation tank (1) is provided with guide grooves (5) matched with the guide blocks (14), the number of the guide grooves (5) is consistent with the guide blocks (14), the guide blocks (14) are slid in the interior of the guide grooves (5) towards the discharge port (10) by simultaneously driving the first baffle (8) and the second baffle (11), so that the first baffle (8) and the second baffle (11) can slide relative to each other; The outer wall of the sedimentation tank (1) is fixedly connected with a magnetic strip (6), the magnetic strip (6) is arranged at a position corresponding to the guide grooves (5), and the guide blocks (14) can be attracted by magnetic force; The through hole of the moving plate (7) is provided with a mounting ring (13), one end of the filter barrel (9) extends to the inside of the mounting ring (13) and is rotationally connected, the inside of the mounting ring (13) is fixedly provided with a water wheel blade (12), the water wheel blade (12) is fixedly connected with a connecting rod (18), and the other end of the connecting rod (18) is fixedly connected with the inside of the filter barrel (9). By controlling the sliding of the moving plate (7) in the sedimentation tank (1), the water flow can drive the water wheel blade (12) to rotate through the mounting ring (13), and the filter barrel (9) is driven to rotate under the action of the connecting rod (18). The end, away from the first baffle (8), of the moving plate (7) is fixedly connected with a scraping strip (19), and one end of the scraping strip (19) is attached to the outer wall of the filter barrel (9).

2. The modified biological membrane process MABR sewage treatment device according to claim 1, characterized in that: The inside of the sedimentation tank (1) is fixedly provided with a flow guide block (4).

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