Sewage treatment device based on MBR (Membrane Bioreactor) process

Abstract

The utility model relates to the technical field of water treatment, and provides a sewage treatment device based on an MBR (membrane bioreactor) process, which comprises an AAO (anaerobic-anoxic-oxic) biochemical treatment component, a pre-sedimentation tank and an MBR membrane tank, the AAO biochemical treatment component comprises an anaerobic tank, an anoxic tank and an aerobic tank, and the anaerobic tank, the anoxic tank and the aerobic tank are sequentially communicated; the pre-sedimentation tank is communicated with the aerobic tank, and the pre-sedimentation tank is used for adjusting the sludge concentration of sewage; and the MBR membrane tank is communicated with the pre-sedimentation tank. According to the sewage treatment device based on the MBR process, sewage treated by the AAO biochemical treatment assembly is subjected to preliminary sedimentation through the pre-sedimentation tank so as to adjust the sludge concentration of the sewage, and by controlling the sludge concentration of the sewage, the influence of the sludge concentration on an MBR membrane is reduced, the membrane flux is prevented from being reduced, and the treatment efficiency of the MBR membrane is improved; meanwhile, the sufficient sludge concentration in the AAO biochemical treatment assembly is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of water treatment, and in particular to a wastewater treatment device based on MBR process. Background Technology

[0002] AAO method, also known as A 2 The AAO (Anoxic-Oxic) process is a commonly used wastewater treatment technology suitable for secondary or tertiary wastewater treatment, as well as reclaimed water reuse. It offers excellent nitrogen and phosphorus removal. The AAO activated sludge treatment process requires a separate sludge-water separation facility, a secondary sedimentation tank. Due to the influence of sludge settling, the sludge concentration in the biological reaction tank is generally maintained at 3000-4000 mg / L. MBR (Membrane Bio-Reactor) is a novel water treatment technology that combines the activated sludge process with membrane separation technology. AAO-MBR is a wastewater treatment process that organically combines traditional AAO activated sludge treatment technology with membrane separation technology. This process combines the advantages of both traditional AAO and MBR processes. Due to the efficient retention of the membrane module, effective separation of HRT and SRT (HRT is the average residence time of wastewater in the reactor, i.e., the average reaction time between wastewater and microorganisms in the bioreactor; SRT is the average residence time of activated sludge in the entire system) is achieved. This allows the process to operate under conditions of longer SRT and shorter HRT, while maintaining a high sludge concentration in the bioreactor (exceeding 10,000 mg / L). This provides sufficient growth and reproduction time for slow-growing microorganisms, ensuring a sufficient number of slow-growing bacteria within the process, thus resulting in better pollutant removal.

[0003] Currently, technical issues such as membrane fouling in MBR reactors limit the further promotion and application of the MBR process. Membrane fouling refers to the adsorption and deposition of microorganisms and their metabolites, solid particles, suspended particles, colloidal particles, or dissolved macromolecular organic matter in the mixed liquor within the bioreactor on the membrane surface or within the membrane pores, resulting in reduced membrane pore size or blockage. Sludge concentration is one of the most fundamental biological phase properties in a bioreactor. Studies have shown that at lower sludge concentrations (MLSS < 6000 mg / L), the membrane fouling rate decreases with increasing sludge concentration; at higher sludge concentrations (MLSS > 15000 mg / L, MLSS is short for mixed liquid suspended solids, also known as mixed liquor sludge concentration, measured in milligrams per liter), the membrane fouling rate increases with increasing sludge concentration; while at 8000-12000 mg / L, sludge concentration has little effect on membrane fouling. Of course, the optimal sludge concentration varies depending on the manufacturer and the material of the membrane bioreactor. Therefore, to ensure the efficient operation of the membrane bioreactor, the sludge concentration needs to be maintained at a reasonable level.

[0004] Existing AAO-MBR processes often suffer from problems such as accelerated MBR membrane fouling and a rapid decline in membrane flux due to unsuitable sludge concentration within the bioreactor. Conversely, maintaining a consistently low sludge concentration fails to fully realize the advantages of the MBR process. Furthermore, the lack of a separate sedimentation unit necessitates the staged recirculation of large volumes of mixed liquor from the MBR membrane tank to the aerobic zone, from the aerobic zone to the anoxic zone, and from the anoxic zone to the anaerobic zone to ensure sufficient sludge concentration in the upstream bioreactor, significantly increasing energy consumption. Accelerated membrane fouling, rapid decline in membrane flux, high energy consumption, and high operating costs are the main limiting factors for the MBR process. Utility Model Content

[0005] This invention provides a wastewater treatment device based on MBR technology to address the defects of membrane fouling in existing MBR reactors, prevent excessively rapid decline in membrane flux, improve the treatment efficiency of MBR membranes, and increase water production rate.

[0006] This utility model provides a wastewater treatment device based on MBR technology, comprising:

[0007] The AAO biochemical treatment component includes an anaerobic tank, an anoxic tank, and an aerobic tank, which are connected in sequence.

[0008] A pre-sedimentation tank, connected to the aerobic tank, is used to adjust the sludge concentration of the wastewater;

[0009] The MBR membrane tank is connected to the pre-precipitation tank.

[0010] According to the present invention, a wastewater treatment device based on MBR process is provided, wherein a water distribution wall is provided between the pre-sedimentation tank and the aerobic tank.

[0011] According to the present invention, a wastewater treatment device based on MBR process is provided, wherein a first return pipe is provided between the pre-sedimentation tank and the anoxic tank, and the sludge from the pre-sedimentation tank flows into the anoxic tank through the first return pipe.

[0012] According to the present invention, a wastewater treatment device based on MBR process is provided, wherein a sludge collection tank is provided at the bottom of the pre-sedimentation tank, and the first return pipe is connected to the sludge collection tank.

[0013] According to the present invention, a wastewater treatment device based on MBR process is provided, wherein the sludge collection trough extends from the perimeter of the bottom of the tank to the center of the bottom of the tank.

[0014] According to the present invention, a wastewater treatment device based on MBR process is provided, wherein the pre-sedimentation tank is an anoxic zone.

[0015] According to the wastewater treatment device based on MBR process provided by this utility model, the pre-sedimentation tank further includes a tank body, a sedimentation component, and a sludge scraping component. The tank body includes a settling zone and a sludge scraping zone, with the settling zone located above the sludge scraping zone. The sedimentation component is disposed in the settling zone, and the sludge scraping component is disposed in the sludge scraping zone. The sludge scraping component includes a shaft, a rotating frame connected to the shaft, and a scraper plate disposed on the rotating frame. An outlet is provided on the pre-sedimentation tank, and the outlet is located above the rotating frame.

[0016] According to the present invention, a wastewater treatment device based on MBR process is provided, wherein the cross-sectional shape of the settling zone is rectangular and the cross-sectional shape of the sludge scraping zone is circular.

[0017] According to the present invention, a wastewater treatment device based on MBR process is provided, wherein the sedimentation component includes a large number of densely packed inclined plates, inclined tubes or hydraulic corrugated plates.

[0018] According to the wastewater treatment device based on MBR process provided by this utility model, there are several sludge scrapers, which are distributed along the length of the rotating frame, and each sludge scraper is inclinedly arranged on the rotating frame.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0020] The wastewater treatment device based on MBR technology includes an AAO biological treatment component, a pre-sedimentation tank, and an MBR membrane tank. The AAO biological treatment component includes an anaerobic tank, an anoxic tank, and an aerobic tank, which are connected in sequence. The pre-sedimentation tank is connected to the aerobic tank and is used to adjust the sludge concentration of the wastewater. The MBR membrane tank is connected to the pre-sedimentation tank.

[0021] This wastewater treatment device based on MBR technology includes a pre-sedimentation tank between the AAO biological treatment module and the MBR membrane tank. Wastewater treated by the AAO biological treatment module undergoes preliminary sedimentation in the pre-sedimentation tank to adjust the sludge concentration. Once the sludge concentration in the pre-sedimentation tank reaches a set concentration, the effluent from the pre-sedimentation tank enters the MBR membrane tank. By controlling the sludge concentration of the wastewater, the impact of sludge concentration on the MBR membrane is reduced, preventing a decrease in membrane flux, improving the treatment efficiency of the MBR membrane, increasing the permeate production rate, and ensuring sufficient sludge concentration in the AAO biological treatment module. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a wastewater treatment device based on the MBR process provided in an embodiment of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the pre-sedimentation tank of the wastewater treatment device based on the MBR process provided in this embodiment of the utility model;

[0025] Figure 3 This is another structural schematic diagram of the pre-sedimentation tank of the wastewater treatment device based on the MBR process provided in this embodiment of the utility model.

[0026] Figure label:

[0027] 100. AAO biological treatment components; 110. Anaerobic tank; 120. Anoxic tank; 130. Aerobic tank;

[0028] 200. Pre-sedimentation tank; 210. Sedimentation assembly; 220. Sludge scraping assembly; 221. Shaft; 222. Rotating frame; 223. Sludge scraper; 230. Sludge collection trough; 240. First return pipe;

[0029] 300, MBR membrane tank. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] The first aspect of this utility model provides a wastewater treatment device based on MBR technology, such as... Figure 1 As shown, the system includes an AAO biological treatment component 100, a pre-sedimentation tank 200, and an MBR membrane tank 300. The AAO biological treatment component 100 includes an anaerobic tank 110, an anoxic tank 120, and an aerobic tank 130, which are connected in sequence. The pre-sedimentation tank 200 is connected to the aerobic tank 130 and is used to adjust the sludge concentration of the wastewater. The MBR membrane tank 300 contains an MBR membrane and is connected to the pre-sedimentation tank 200.

[0032] In the prior art, to ensure sufficient sludge concentration in the AAO biological treatment component 100 for AAO biological treatment, the wastewater after AAO biological treatment contains a large amount of sludge. To avoid excessive sludge concentration affecting the membrane flux of the MBR membrane, this embodiment of the invention sets up a pre-sedimentation tank 200 between the AAO biological treatment component 100 and the MBR membrane tank 300. The wastewater treated by the AAO biological treatment component 100 undergoes preliminary sedimentation in the pre-sedimentation tank 200 to adjust the sludge concentration of the wastewater. When the sludge concentration in the pre-sedimentation tank 200 reaches the set sludge concentration, the effluent from the pre-sedimentation tank 200 enters the MBR membrane tank 300. By controlling the sludge concentration of the wastewater, the impact of sludge concentration on the MBR membrane is reduced. The appropriate reduction in sludge concentration slows down the rate of decrease in the membrane flux of the MBR membrane, alleviates membrane fouling, improves the treatment efficiency of the MBR membrane, increases the permeate rate, extends the service life of the MBR membrane, and thereby reduces operating costs, while ensuring sufficient sludge concentration in the AAO biological treatment component 100.

[0033] Generally, the sludge concentration is set between 8000-12000 mg / L to maximize the working efficiency of the MBR membrane, enabling the MBR membrane tank 300 to operate efficiently and improve the water production rate. Of course, the optimal sludge concentration varies depending on the manufacturer and the material of the membrane bioreactor, and the sludge concentration can be set according to specific circumstances.

[0034] In one embodiment, a water distribution wall is provided between the pre-sedimentation tank 200 and the aerobic tank 130, so that the water inlet to the pre-sedimentation tank 200 enters from the water distribution wall in a lateral flow direction, making the water inlet direction of the pre-sedimentation tank 200 perpendicular to the sedimentation direction of the pre-sedimentation tank 200, thereby reducing the impact of the inlet water flow on the sedimentation effect; the water distribution wall is a porous wall, which makes the flow rate evenly distributed on the inlet cross section, thereby reducing the disturbance to the pre-sedimentation tank 200.

[0035] In one embodiment, a first return pipe 240 is provided between the pre-sedimentation tank 200 and the anoxic tank 120. The sludge from the pre-sedimentation tank 200 flows into the anoxic tank 120 through the first return pipe 240 to increase the sludge concentration in the anoxic tank 120, thereby achieving denitrification and improving water treatment efficiency. Since the first return pipe 240 returns the settled sludge, the concentration of the sludge after preliminary sedimentation increases, reducing the return flow and thus saving energy.

[0036] Specifically, such as Figures 2 to 3 As shown, the pre-sedimentation tank 200 includes a tank body, a sedimentation assembly 210, a sludge scraping assembly 220, and a drive assembly. The sludge scraping assembly 220 includes a shaft 221, a rotating frame 222 connected to the shaft 221, and a sludge scraper 223 disposed on the rotating frame 222.

[0037] The tank includes a settling zone and a sludge scraping zone, with the settling zone located above the sludge scraping zone. A sedimentation assembly 210 is disposed in the settling zone, and a sludge scraping assembly 220 is disposed in the sludge scraping zone. The sedimentation assembly 210 includes numerous densely packed inclined plates, inclined tubes, or hydraulic corrugated plates. Suspended solids in the water settle within these plates, tubes, or plates, and the separated suspended solids displace downwards along these plates, tubes, or plates under gravity. The inclined plates, tubes, or plates are existing technologies and will not be described further here.

[0038] In this embodiment of the present invention, the sludge scraping assembly 220 is disposed in the sludge scraping area. The shaft 221 of the sludge scraping assembly 220 is suspended from the top of the tank body via a bearing device, and the drive assembly is disposed at the top of the tank body. The drive assembly may specifically include a motor and a reducer. The motor is connected to the shaft 221 of the sludge scraping assembly 220 via the reducer. The motor can drive the shaft 221 to rotate, thereby driving the rotating frame 222 to rotate, realizing the sludge scraping function of the sludge scraping assembly 220. The drive assembly is used to drive the rotating frame 222 to rotate. A sludge collection trough 230 is provided at the bottom of the tank body, and the sludge scraper 223 is used to scrape the sludge at the bottom of the tank into the sludge collection trough 230. The sludge scraping assembly 220 provided in this embodiment of the present invention adopts a rotating sludge scraping method, which can realize continuous sludge discharge, achieve efficient sludge discharge, and facilitate sludge return to the anoxic tank 120.

[0039] The sedimentation zone has a rectangular cross-section, while the sludge scraping zone has a circular cross-section. In this embodiment, the tank body is designed with a rectangular upper section for easy placement of the sedimentation assembly 210, and a circular lower section to accommodate the rotation area of ​​the sludge scraping assembly 220. This allows the sludge scraping assembly 220 to scrape all the sludge from the bottom of the pre-sedimentation tank 200 into the sludge collection trough 230. To further facilitate the scraping of sludge into the sludge collection trough 230 by the sludge scraping assembly 220, in a further embodiment, the height of the sludge collection trough 230 gradually decreases from the periphery to the center of the tank bottom, forming a funnel-shaped structure. The sludge collection trough 230 is positioned at the center of the tank bottom, allowing the sludge to slide along the bottom under gravity, thus facilitating sludge collection. The sludge scraping assembly 220, with the sludge collection trough 230 as its rotation center, gradually scrapes the sludge from the outer periphery to the center into the sludge collection trough 230. Specifically, multiple scraper blades 223 are provided and distributed along the length of the rotating frame 222, with each scraper blade 223 inclined on the rotating frame 222. When the scraper assembly 220 rotates, since the scraper blades 223 are inclined on the rotating frame 222, the specific inclination angle can be set according to the actual situation. By setting the inclination angle of the scraper blades 223, when the rotating frame 222 rotates, the scraper blades 223 can cause the sludge to tend to move towards the center when scraping the sludge, thereby causing the sludge to gather towards the center.

[0040] In a further embodiment, an outlet is provided on the side wall of the pre-sedimentation tank 200, positioned above the rotating frame 222. This facilitates the flow of supernatant from the tank into the MBR membrane tank 300, reducing the sludge concentration in the MBR membrane tank 300. An inlet is provided on the side wall of the tank, also positioned above the rotating frame 222. This prevents the incoming water flow from carrying the sludge upwards, thus avoiding the turbulence of flocculent particles.

[0041] To facilitate the flow of sludge through the first return pipe 240 to the anoxic tank 120, the first return pipe 240 is connected to the bottom of the sludge collection trough 230. A water pump is installed on the first return pipe 240 to discharge the sludge in the sludge collection trough 230 to the anoxic tank 120. Two water pumps are installed on the first return pipe 240 as backups to avoid affecting the sludge discharge work due to water pump failure.

[0042] In a further embodiment, a sludge discharge pipe is also included. One end of the sludge discharge pipe is connected to the first return pipe 240, that is, the sludge discharge pipe constitutes a branch pipe of the first return pipe 240. The other end of the sludge discharge pipe is connected to an external sludge storage tank so as to discharge excess sludge to the outside.

[0043] In order to prevent the sludge returned by the first return pipe 240 from damaging the anoxic environment of the anoxic tank 120, the pre-sedimentation tank 200 is an anoxic zone, which further reduces the dissolved oxygen in the returned sludge, thus not damaging the anoxic environment of the anoxic tank 120 and making it more conducive to denitrification in the anoxic tank 120.

[0044] The MBR membrane tank 300 serves as a filter, and the clean water flowing through the MBR membrane tank 300 flows to an external clean water tank. A second return pipe connects the MBR membrane tank 300 and the aerobic tank 130 to return the sludge from the MBR membrane tank 300 to the aerobic tank 130, thereby increasing the sludge concentration in the aerobic tank 130. A third return pipe connects the anoxic tank 120 and the anaerobic tank 110 to return the sludge from the anoxic tank 120 to the anaerobic tank 110, thereby increasing the sludge concentration in the anaerobic tank 110. Water pumps are installed on the second and third return pipes respectively to provide the power for the return flow.

[0045] This utility model embodiment also includes a first water inlet pipe and a second water inlet pipe. The first water inlet pipe is connected to the anaerobic tank 110 and is used for the water intake of the anaerobic tank 110. The second water inlet pipe is connected to the anoxic tank 120 so as to add a carbon source in the second water inlet pipe to meet the denitrification needs of the anoxic tank 120.

[0046] First, wastewater enters the anaerobic tank 110 directly through the first inlet pipe. The influent mixes with the sludge in the anaerobic tank 110 to form a mixed liquid. After passing through the anaerobic tank 110, the wastewater enters the anoxic tank 120. Alternatively, wastewater can enter the anoxic tank 120 through the second inlet pipe. If the carbon source in the first inlet pipe is sufficient, the ratio of the influent to the second inlet pipe can be adjusted according to actual needs to meet the requirements of biological phosphorus removal and nitrogen removal, respectively. If the carbon source is insufficient, carbon source is added to the second inlet pipe to meet the nitrogen removal requirements of the anoxic tank 120. Carbon source can also be added to the anoxic tank 120 as needed. Under the action of microorganisms, the wastewater undergoes different reactions in the anaerobic tank 110, the anoxic tank 120, and the aerobic tank 130, respectively, to remove organic matter, nitrogen, phosphorus, and other substances.

[0047] After being treated by AAO biochemical processes, the wastewater enters the pre-sedimentation tank 200 through a water distribution wall. This ensures that the influent to the pre-sedimentation tank 200 enters from the water distribution wall in a lateral flow direction, making the influent direction perpendicular to the sedimentation direction of the pre-sedimentation tank 200, thereby reducing the impact of the influent flow on the sedimentation effect. The water distribution wall is a porous wall, which ensures that the flow rate is evenly distributed on the influent cross section, thereby reducing disturbance to the pre-sedimentation tank 200.

[0048] The mixed liquor flows laterally into the pre-sedimentation tank 200, where it undergoes a short pre-sedimentation period of 30 minutes. Dissolved oxygen is further consumed by microorganisms during this process, and initial separation of sludge and water occurs. The sedimentation time can be selected appropriately based on actual conditions. The pre-sedimentation tank 200 is an anoxic zone, so oxygenation is unnecessary to avoid affecting the sedimentation effect. Furthermore, the dissolved oxygen is further consumed by microorganisms during sedimentation, resulting in low dissolved oxygen levels returning to the anoxic tank 120, thus preventing disruption of the anoxic environment. Simultaneously, the sludge in the anoxic tank 120 is returned to the anaerobic tank 110 through a third return pipe to maintain the sludge concentration in the anaerobic tank 110.

[0049] The sludge from the wastewater in the pre-sedimentation tank 200, after being settled by inclined plates, inclined pipes or hydraulic corrugated plates, quickly falls to the sludge scraping zone. Under the action of the scraper 223, the settled sludge is scraped to the sludge collection tank 230. The sludge in the sludge collection tank 230 is returned to the anoxic zone through the first return pipe 240. As needed, some sludge can be directly discharged to the external sludge storage tank through the sludge discharge pipe. In the pre-sedimentation tank 200, the upper layer is a mixed liquor that has undergone preliminary sludge-water separation. Pre-sedimentation reduces the sludge concentration in the upper mixed liquor, effectively lowering the sludge concentration entering the MBR membrane tank 300. This appropriate reduction in sludge concentration slows the decline in MBR membrane flux, alleviates membrane fouling, extends the lifespan of the MBR membrane, and consequently reduces operating costs. The preliminary sedimentation of sludge here increases its concentration, appropriately reducing the amount of sludge returned to the anoxic tank 120, thus saving energy. Furthermore, the preliminary sedimentation further reduces the dissolved oxygen content in the returned sludge, preventing disruption of the anoxic environment in the anoxic tank 120 and facilitating denitrification within it. The MBR membrane tank 300 filters the wastewater treated in the pre-sedimentation tank 200. The sludge in the MBR membrane tank 300 is then returned to the aerobic tank 130 via a second return pipe.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A wastewater treatment device based on MBR technology, characterized in that, include: The AAO biochemical treatment component includes an anaerobic tank, an anoxic tank, and an aerobic tank, which are connected in sequence. A pre-sedimentation tank, connected to the aerobic tank, is used to adjust the sludge concentration of the wastewater. The pre-sedimentation tank further includes a tank body, a sedimentation assembly, and a sludge scraping assembly. The tank body includes a settling zone and a sludge scraping zone, with the settling zone located above the sludge scraping zone. The sedimentation assembly is disposed in the settling zone, and the sludge scraping assembly is disposed in the sludge scraping zone. The sludge scraping assembly includes a shaft, a rotating frame connected to the shaft, and a scraper plate disposed on the rotating frame. The MBR membrane tank is connected to the pre-precipitation tank.

2. The wastewater treatment device based on MBR process according to claim 1, characterized in that, A water distribution wall is provided between the pre-sedimentation tank and the aerobic tank.

3. The wastewater treatment device based on MBR process according to claim 1, characterized in that, A first return pipe is provided between the pre-sedimentation tank and the anoxic tank, and the sludge from the pre-sedimentation tank flows into the anoxic tank through the first return pipe.

4. The wastewater treatment device based on MBR process according to claim 3, characterized in that, The bottom of the pre-sedimentation tank is provided with a sludge collection trough, and the first return pipe is connected to the sludge collection trough.

5. The wastewater treatment device based on MBR process according to claim 4, characterized in that, The sludge collection trough runs from the perimeter of the pool bottom to the center of the pool bottom.

6. The wastewater treatment device based on MBR process according to any one of claims 1 to 5, characterized in that, The pre-sedimentation tank is an oxygen-deficient zone.

7. The wastewater treatment device based on MBR process according to any one of claims 1 to 5, characterized in that, The pre-sedimentation tank is provided with an outlet, which is located above the rotating frame.

8. The wastewater treatment device based on MBR process according to claim 7, characterized in that, The settling zone has a rectangular cross-sectional shape, and the sludge scraping zone has a circular cross-sectional shape.

9. The wastewater treatment device based on MBR process according to claim 7, characterized in that, Sedimentation components include a large number of densely packed inclined plates, inclined tubes, or hydraulic corrugated plates.

10. The wastewater treatment device based on MBR process according to claim 7, characterized in that, Several scraper blades are provided and distributed along the length of the rotating frame, with each scraper blade set at an angle on the rotating frame.

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