Compact integrated sewage treatment equipment based on coupled MBR (Membrane Bioreactor) membrane

Abstract

The invention discloses compact integrated sewage treatment equipment based on a coupled MBR membrane, and belongs to the technical field of sewage treatment.The compact integrated sewage treatment equipment comprises a treatment pond, the bottom in the treatment pond is fixedly connected with an aeration device through a supporting rod, and a plurality of membrane filtering mechanisms are arranged above the aeration device; each group of membrane filtration mechanism is fixedly clamped with the inner wall of the treatment pond through a group of clamping pieces, the plurality of groups of membrane filtration mechanisms are jointly communicated with a water suction pump through a water suction pipe, the water suction pump is fixedly connected with the outer wall of the treatment pond, and a water outlet of the water suction pump is fixedly communicated with a drainage pipe; according to the invention, the membrane filtration mechanism is mounted in a lap joint manner, so that the replacement convenience of a filtration membrane assembly can be effectively improved, the surface cleaning effect of membrane filaments can be effectively improved through ultrasonic oscillation, and the filtration efficiency of the membrane filaments is further improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a compact integrated wastewater treatment device based on a coupled MBR membrane. Background Technology

[0002] The background technology of coupled MBR membrane water treatment stems from breakthroughs in the bottlenecks of traditional wastewater treatment technologies and the increasing demand for high-quality effluent and resource recovery. While the traditional activated sludge process is widely used, it relies on secondary sedimentation tanks for sludge-water separation, which has inherent drawbacks such as large footprint, sludge bulking leading to effluent quality deterioration, and limited efficiency in removing recalcitrant organic matter and nitrogen and phosphorus. To overcome these challenges, membrane bioreactor technology has emerged. Its core is to directly replace the secondary sedimentation tank with a membrane separation unit (usually a microfiltration or ultrafiltration membrane). Through the physical sieving action of the membrane, thorough sludge-water separation is achieved, resulting in significant advantages such as excellent effluent quality, near-zero discharge of suspended solids and bacteria, long sludge age promoting the growth of slow-proliferating nitrifying bacteria for efficient denitrification, and a significantly reduced footprint.

[0003] MBR technology itself also faces challenges such as high operating energy consumption due to membrane fouling, high cost of membrane modules, and periodic cleaning and replacement. Combining MBR technology with other microbial degradation or oxidative degradation technologies can extend the service life of membrane modules to some extent. However, the effect of extending the service life of membrane modules through the above coupling methods is limited and cannot achieve optimal MBR membrane efficiency. Therefore, a device that can extend the service life of membrane modules and improve the filtration efficiency of MBR membranes is needed. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a compact integrated wastewater treatment device based on a coupled MBR membrane.

[0005] The technical solution of this invention is: a compact integrated wastewater treatment device based on coupled MBR membrane, comprising a treatment tank, an aeration device fixedly connected to the bottom of the treatment tank by a support rod, multiple sets of membrane filtration mechanisms above the aeration device, each set of membrane filtration mechanisms being fixedly snapped to the inner wall of the treatment tank by a set of snap-fit ​​components, multiple sets of membrane filtration mechanisms being connected to a water suction pump through a water suction pipe, the water suction pump being fixedly connected to the outer wall of the treatment tank, the outlet of the water suction pump being fixedly connected to a drain pipe, an inlet pipe being fixedly connected to the lower left side of the treatment tank, the left end of the inlet pipe being connected to a sludge mixing chamber, the middle part of the inlet pipe being fixedly connected to an inlet pump, a return mechanism being fixedly connected to the lower right side of the treatment tank, and a PLC controller electrically connected to the aeration device, water suction pump, membrane filtration mechanism, and return mechanism being fixedly connected to the outer wall of the treatment tank.

[0006] Furthermore, the snap-fit ​​component includes two bottom brackets and two top support rods. The upper part of the two bottom brackets abuts against each group of membrane filtration mechanisms, the lower part of the two bottom brackets is fixedly connected to the bottom of the treatment tank, and the two ends of the two top support rods are respectively fixedly connected to the inner walls of the front and rear sides of the treatment tank.

[0007] Note: The above-mentioned snap-fit ​​mechanism allows for quick placement of the membrane filtration unit in the treatment tank and quick removal of the membrane filtration unit from the treatment tank.

[0008] Furthermore, the membrane filtration mechanism includes a fixed frame, and each of the four top corners of the fixed frame is fixedly connected to an outwardly extending overlapping rod, which overlaps above the top support rod. A membrane assembly is fixedly connected inside the fixed frame.

[0009] Note: The membrane module is fixed in the frame by the fixing frame, which facilitates the snap-fit ​​connection with the snap-fit ​​parts and also provides support for the membrane module.

[0010] Furthermore, the membrane assembly includes multiple bottom crossbars and top cross tubes corresponding to the bottom crossbars. The left and right ends of the bottom crossbars are fixedly connected to the fixed frame. The top of the multiple top cross tubes is connected to the water suction pipe. Several filter membranes are provided between each bottom crossbar and the top cross tube.

[0011] Explanation: Wastewater containing activated sludge is filtered by multiple filter membranes. The number of filter membranes can increase the contact area between the filter membranes and the wastewater, thereby improving the filtration efficiency of the membrane module.

[0012] Furthermore, the filter membrane includes membrane fibers, and each end of the membrane fiber is inserted with a connecting tube. The connecting tube at the upper end of the membrane fiber is threadedly connected to the top horizontal tube and is internally connected, while the connecting tube at the lower end of the membrane fiber is threadedly connected to the bottom horizontal bar.

[0013] Note: The connection between the connecting tube and the bottom crossbar and the top crossbar is threaded to improve the convenience of membrane replacement.

[0014] Furthermore, the aeration device includes an air pump fixedly connected to the outer wall of the treatment tank. The air pump is electrically connected to the PLC controller. The air outlet of the air pump is connected to an air supply pipe. The end of the air supply pipe is connected to an aeration main pipe. Aeration branch pipes are fixedly connected to both sides of the aeration main pipe. Multiple aeration heads are fixedly connected to the top of both the aeration main pipe and the aeration branch pipes. Aeration holes are provided on the upper surface of each aeration head.

[0015] Explanation: By increasing the oxygen content in wastewater through aeration heads, the normal metabolism of aerobic microorganisms is ensured, effectively degrading pollutants. The large number of bubbles generated by the aeration heads, during their ascent, will drive the mixed liquid to generate violent turbulence and upward flow velocity. This flow forms shear force on the membrane fiber surface, which has a removal effect on pollutants attached to the membrane fiber surface, significantly slows down the rise rate of transmembrane pressure difference, extends the chemical cleaning cycle of the membrane, and thus reduces operating costs and energy consumption.

[0016] Furthermore, the sludge mixing chamber includes a chamber body and a stirring rod rotatably connected inside the chamber body. A stirring motor for driving the stirring rod to rotate is fixedly connected to the top of the chamber body. The liquid inlet pump and the stirring motor are both electrically connected to the PLC controller. A sludge addition port is provided at the top of the chamber body, and a wastewater inlet is fixedly connected to the left side of the chamber body.

[0017] Note: The sludge inlet facilitates the addition of activated sludge, and the stirring motor drives the stirring rod to rotate, which is beneficial for mixing activated sludge and wastewater.

[0018] Furthermore, the reflux mechanism includes a reflux pump fixedly connected to the outer wall of the treatment tank. The reflux pump is electrically connected to the PLC controller. The inlet of the reflux pump is connected to the interior of the treatment tank, and the outlet of the reflux pump is connected to a reflux pipe. The end of the reflux pipe is fixedly connected to the right side of the tank body.

[0019] Explanation: As the membrane filtration unit filters the wastewater, the activated sludge content in the treatment tank continuously increases. The excessively high concentration of activated sludge makes the membrane fiber surface more susceptible to fouling. By passing the wastewater with high concentration of activated sludge in the treatment tank through the return pipe into the sludge mixing chamber, it is mixed with the wastewater with lower activated sludge content. This not only solves the problem of excessive activated sludge content in the treatment tank, but also enables the recycling of activated sludge and improves the utilization efficiency of activated sludge.

[0020] Furthermore, the inner wall of the treatment pool is provided with multiple ultrasonic transducers, and the outer wall of the treatment pool is fixedly connected with an ultrasonic drive power supply for powering the ultrasonic transducers.

[0021] Explanation: Ultrasonic oscillations are generated by an ultrasonic transducer. The physical effect of ultrasonic oscillations cleans the membrane surface and pores. The ultrasonic transducer can be started intermittently to reduce the energy consumption of this device. Cleaning the membrane surface by ultrasonic oscillation can reduce the frequency of chemical cleaning, thereby extending the service life of the membrane module, increasing membrane flux, and thus improving the membrane filtration efficiency.

[0022] Furthermore, a circulation pump is fixedly connected to both the left and right inner walls of the treatment tank. The inlet and outlet of both circulation pumps are connected to a guide pipe. The inlet of the circulation pump located on the left inner wall of the treatment tank is above the circulation pump, and the outlet is below the circulation pump. The inlet of the circulation pump located on the right inner wall of the treatment tank is below the circulation pump, and the outlet is above the circulation pump.

[0023] Explanation: By circulating water in the treatment tank through a circulation pump, the scouring effect of the water flow on the membrane fiber surface can be improved, thereby increasing the service life of the membrane fiber. It can also increase the residence time of oxygen in the water, thereby reducing the energy consumption of the air pump.

[0024] The beneficial effects of this invention are: This invention improves the ease of membrane module replacement by installing the membrane filtration mechanism through overlapping. Ultrasonic oscillation effectively enhances the surface cleaning effect of the membrane fibers, thereby improving the filtration efficiency of the membrane fibers. The aeration device effectively increases the oxygen content of the wastewater in the treatment tank and enhances the decomposition ability of microorganisms in the activated sludge. The reflux mechanism mixes wastewater containing high concentrations of activated sludge with wastewater containing low concentrations of activated sludge, improving the utilization efficiency of activated sludge and reducing the negative impact of membrane fiber surface fouling. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention.

[0026] Figure 2 This is a schematic diagram of the membrane module structure of the present invention.

[0027] Figure 3 This is a cross-sectional view of the filter membrane of the present invention.

[0028] Figure 4 This is a top view of the connection between the main aeration pipe and the branch aeration pipe of the present invention.

[0029] Figure 5 This is a left view of the guide tube of the present invention.

[0030] Among them, 1-treatment tank, 2-aeration device, 3-membrane filtration mechanism, 31-water suction pipe, 32-water suction pump, 33-drainage pipe, 4-clamping component, 5-inlet pipe, 6-sludge mixing bin, 51-inlet pump, 7-recirculation mechanism, 8-PLC controller, 41-bottom support, 42-top support rod, 34-fixed frame, 35-overlapping rod, 36-membrane module, 361-bottom crossbar, 362-top cross tube, 363-filter Water film, 3631-membrane fiber, 3632-connecting pipe, 21-air pump, 22-air supply pipe, 23-main aeration pipe, 24-aeration branch pipe, 25-aeration head, 26-aeration hole, 61-bin body, 62-stirring rod, 63-stirring motor, 64-sludge addition port, 65-wastewater inlet, 71-return pump, 72-return pipe, 11-ultrasonic transducer, 12-ultrasonic drive power supply, 9-circulation pump, 91-guide pipe. Detailed Implementation

[0031] Example 1: like Figure 1 As shown, a compact integrated wastewater treatment device based on coupled MBR membrane includes a treatment tank 1. An aeration device 2 is fixedly connected to the bottom of the treatment tank 1 by a support rod. Multiple membrane filtration mechanisms 3 are provided above the aeration device 2. Each membrane filtration mechanism 3 is fixedly connected to the inner wall of the treatment tank 1 by a set of snap-fit ​​parts 4. The multiple membrane filtration mechanisms 3 are connected to a suction pump 32 through a suction pipe 31. The suction pump 32 is fixedly connected to the outer wall of the treatment tank 1. The outlet of the suction pump 32 is fixedly connected to a drain pipe 33. An inlet pipe 5 is fixedly connected to the lower left side of the treatment tank 1. The left end of the inlet pipe 5 is connected to a sludge mixing chamber 6. The middle part of the inlet pipe 5 is fixedly connected to an inlet pump 51. A return mechanism 7 is fixedly connected to the lower right side of the treatment tank 1. A PLC controller 8, which is electrically connected to the aeration device 2, the suction pump 32, the membrane filtration mechanism 3, and the return mechanism 7, is fixedly connected to the outer wall of the treatment tank 1. The water suction pump 32, the liquid inlet pump 51, and the PLC controller 8 are all commercially available products. As long as they can achieve the functions of this invention, they are acceptable. Those skilled in the art can choose to use them based on common sense, and no special limitations are made here.

[0032] The snap-fit ​​component 4 includes two bottom supports 41 and two top supports 42. The top of the two bottom supports 41 abuts against each group of membrane filtration mechanisms 3, and the bottom of the two bottom supports 41 is fixedly connected to the bottom of the treatment tank 1. The two ends of the two top supports 42 are fixedly connected to the inner walls of the front and rear sides of the treatment tank 1, respectively.

[0033] The membrane filtration unit 3 can be quickly placed in the treatment tank 1 and quickly removed from the treatment tank 1 using the aforementioned snap-fit ​​component 4.

[0034] The membrane filtration mechanism 3 includes a fixed frame 34, and each of the four top corners of the fixed frame 34 is fixedly connected to an outwardly extending overlapping rod 35. The overlapping rod 35 overlaps above the top support rod 42. The membrane assembly 36 is fixedly connected inside the fixed frame 34.

[0035] The membrane assembly 36 is fixed in the fixed frame 34, which facilitates the snap-fit ​​with the snap-fit ​​part 4 and also provides support for the membrane assembly 36.

[0036] The membrane module 36 includes multiple bottom crossbars 361 and top crossbars 362 corresponding to the bottom crossbars 361. The left and right ends of the bottom crossbars 361 are fixedly connected to the fixed frame 34. The top of the multiple top crossbars 362 are connected to the water suction pipe 31. Several filter membranes 363 are provided between each bottom crossbar 361 and the top crossbar 362.

[0037] Wastewater containing activated sludge is filtered by multiple filter membranes 363. The number of filter membranes 363 can increase the contact area between the filter membrane and the wastewater, thereby improving the filtration efficiency of the membrane module.

[0038] The water filter membrane 363 includes membrane fibers 3631. Both the upper and lower ends of the membrane fibers 3631 are inserted and connected to a connecting tube 3632. The connecting tube 3632 at the upper end of the membrane fibers 3631 is threadedly connected to the top horizontal tube 362 and is internally connected. The connecting tube 3632 at the lower end of the membrane fibers 3631 is threadedly connected to the bottom horizontal bar 361.

[0039] The ease of replacing the membrane filament 3631 is improved by connecting the connecting tube 3632 to the bottom crossbar 361 and the top crossbar 362 via threads.

[0040] The aeration device 2 includes an air pump 21 fixedly connected to the outer wall of the treatment tank 1. The air pump 21 is electrically connected to a PLC controller 8. The air outlet of the air pump 21 is connected to an air supply pipe 22. The end of the air supply pipe 22 is connected to an aeration main pipe 23. Aeration branch pipes 24 are fixedly connected to both sides of the aeration main pipe 23. Multiple aeration heads 25 are fixedly connected to the top of both the aeration main pipe 23 and the aeration branch pipes 24. The upper surface of the aeration head 25 is provided with aeration holes 26. The air pump 21 is a commercially available product. As long as it can achieve the function of this invention, it is acceptable. Those skilled in the art can choose to use it based on common sense, and no special limitations are made here.

[0041] By increasing the oxygen content in the wastewater through aeration head 25, the normal metabolism of aerobic microorganisms is ensured, effectively degrading pollutants. The large number of bubbles generated by aeration head 25 will drive the mixed liquid to generate violent turbulence and upward flow velocity during the rising process. This flow forms shear force on the surface of membrane fiber 3631, which has a removal effect on pollutants attached to the surface of membrane fiber 3631, significantly slows down the rise rate of transmembrane pressure difference, prolongs the chemical cleaning cycle of the membrane, thereby reducing operating costs and energy consumption.

[0042] The sludge mixing chamber 6 includes a chamber body 61 and a stirring rod 62 rotatably connected inside the chamber body 61. A stirring motor 63 for driving the stirring rod 62 to rotate is fixedly connected to the top of the chamber body 61. Both the inlet pump 51 and the stirring motor 63 are electrically connected to the PLC controller 8. A sludge addition port 64 is provided on the top of the chamber body 61, and a wastewater inlet 65 is fixedly connected to the left side of the chamber body 61. The stirring motor 63 is a commercially available product, as long as it can achieve the function of this invention. Those skilled in the art can choose to use it based on common sense, and no special limitations are made here.

[0043] The sludge inlet 64 facilitates the addition of activated sludge, and the stirring motor 63 drives the stirring rod 62 to rotate, which is beneficial for the mixing of activated sludge and sewage.

[0044] The reflux mechanism 7 includes a reflux pump 71 fixedly connected to the outer wall of the treatment tank 1. The reflux pump 71 is electrically connected to the PLC controller 8. The inlet of the reflux pump 71 is connected to the interior of the treatment tank 1, and the outlet of the reflux pump 71 is connected to a reflux pipe 72. The end of the reflux pipe 72 is fixedly connected to the right side of the chamber 61. The reflux pump 71 is a commercially available product. As long as it can achieve the function of this invention, it is acceptable. Those skilled in the art can choose to use it based on common sense, and no special limitations are made here.

[0045] As the membrane filtration unit 3 filters the wastewater, the content of activated sludge in the treatment tank 1 continues to increase. The excessively high concentration of activated sludge makes the surface of the membrane fibers 3631 more susceptible to fouling. By passing the return pipe 71, the wastewater with high concentration of activated sludge in the treatment tank 1 is introduced into the sludge mixing chamber 6 to mix with the wastewater with lower activated sludge content. This not only solves the problem of excessive activated sludge content in the treatment tank, but also enables the recycling of activated sludge and improves the utilization efficiency of activated sludge.

[0046] Example 2: The difference between this embodiment and Embodiment 1 is that, in this embodiment, an additional ultrasonic transducer 11 is provided on the inner wall of the treatment pool 1, and an ultrasonic driving power supply 12 for supplying power to the ultrasonic transducer 11 is fixedly connected to the outer wall of the treatment pool 1. Both the ultrasonic transducer 11 and the ultrasonic driving power supply 12 are commercially available products. As long as they can achieve the function of this invention, they are acceptable. Those skilled in the art can choose to use them based on common sense, and no special limitations are made here.

[0047] Ultrasonic oscillations are generated by ultrasonic transducer 11, and the membrane surface and pores are cleaned by the physical effect of ultrasonic oscillations. Ultrasonic transducer 11 can be started intermittently to reduce the energy consumption of the device. Cleaning the membrane surface by ultrasonic oscillation can reduce the frequency of chemical cleaning, thereby extending the service life of the membrane module, increasing the membrane flux and thus improving the membrane filtration efficiency.

[0048] Example 3: The difference between this embodiment and Embodiment 2 is that, in this embodiment, a circulation pump 9 is fixedly connected to both the left and right inner walls of the treatment tank 1. The inlet and outlet of both circulation pumps 9 are connected to guide pipes 91. The inlet of the circulation pump 9 located on the left inner wall of the treatment tank 1 is above the circulation pump 9, and its outlet is below the circulation pump 9. The inlet of the circulation pump 9 located on the right inner wall of the treatment tank 1 is below the circulation pump 9, and its outlet is above the circulation pump 9. Commercially available products can be used for the circulation pumps 9; any pump that can achieve the function of this invention is acceptable. Those skilled in the art can choose to use any pump based on common sense, and no special limitations are made here.

[0049] The water in the treatment tank 1 is circulated by the circulation pump 9, which can improve the scouring effect of the water flow on the surface of the membrane fiber 3631, improve the service life of the membrane fiber, and increase the residence time of oxygen in the water, thereby reducing the energy consumption of the air pump 21.

[0050] The working method of a compact integrated wastewater treatment device based on a coupled MBR membrane in Embodiment 3 above includes the following steps: S1. Wastewater enters the chamber 61 through the wastewater inlet 65, and activated sludge is added through the sludge addition port 64. The stirring motor 63 drives the stirring rod 62 to rotate, so that the wastewater and activated sludge are mixed evenly. Then, the wastewater is sucked into the inlet pipe 5 by the inlet pump 51 and discharged into the treatment tank 1. The membrane filtration mechanism 3 is placed in the treatment tank 1 and is connected to the top support rod 42 by the overlapping rod 35, so that the bottom of the fixed frame 34 in the membrane filtration mechanism abuts against the bottom support 41. The bottom support 41 provides support for the fixed frame 34. The membrane wire is fixed between the bottom crossbar 361 and the top crossbar 362 by the connecting pipe 3632.

[0051] S2. The mixture of activated sludge and wastewater is filtered through membrane fiber 3631 by the suction pump 32 and then enters the suction pipe 31. The purified water is discharged through the drain pipe 33. As the concentration of activated sludge in the treatment tank 1 increases, the high-concentration mixture of activated sludge and wastewater is pumped to the chamber 61 through the return pipe 72 by the return pump 71 and mixed with the low-concentration activated sludge wastewater. S3. Air pump 21 pumps air into the aeration main pipe 23 and aeration branch pipe 24 through air supply pipe 22, and finally discharges it into the wastewater in the treatment tank through the aeration holes 26 on the aeration head 25 to increase the dissolved oxygen in the wastewater and further promote the decomposition efficiency of microorganisms. Ultrasonic drive power supply 12 supplies power to ultrasonic transducer 11. Ultrasonic transducer 11 generates ultrasonic oscillations to remove the activated sludge attached to the surface of membrane fiber 3631, thereby cleaning the surface of membrane fiber 3631. Circulation pump 9 makes the wastewater in the treatment tank form an internal circulation in the treatment tank. Guide pipe 91 can effectively expand the range of wastewater internal circulation.

Claims

1. A compact integrated wastewater treatment device based on a coupled MBR membrane, characterized in that, The treatment tank (1) includes an aeration device (2) fixedly connected to the bottom of the treatment tank (1) by a support rod. Above the aeration device (2) are multiple sets of membrane filtration mechanisms (3). Each set of membrane filtration mechanisms (3) is fixedly connected to the inner wall of the treatment tank (1) by a set of snap-fit ​​parts (4). The multiple sets of membrane filtration mechanisms (3) are connected to a water pump (32) through a water suction pipe (31). The water pump (32) is fixedly connected to the outer wall of the treatment tank (1). The outlet of the water pump (32) is fixedly connected to the outer wall of the treatment tank (1). A drain pipe (33) is fixedly connected to the lower left side of the treatment tank (1). An inlet pipe (5) is fixedly connected to the lower left side of the treatment tank (1). A sludge mixing chamber (6) is fixedly connected to the left end of the inlet pipe (5). An inlet pump (51) is fixedly connected to the middle of the inlet pipe (5). A return mechanism (7) is fixedly connected to the lower right side of the treatment tank (1). A PLC controller (8) is fixedly connected to the outer wall of the treatment tank (1) and electrically connected to the aeration device (2), the water pump (32), the membrane filtration mechanism (3), and the return mechanism (7).

2. The compact integrated wastewater treatment equipment based on coupled MBR membrane as described in claim 1, characterized in that, The snap-fit ​​component (4) includes two bottom supports (41) and two top supports (42). The top of the two bottom supports (41) abuts against each group of membrane filtration mechanisms (3), the bottom of the two bottom supports (41) is fixedly connected to the bottom of the treatment tank (1), and the two ends of the two top supports (42) are fixedly connected to the inner walls of the front and rear sides of the treatment tank (1).

3. The compact integrated wastewater treatment equipment based on coupled MBR membrane as described in claim 2, characterized in that, The membrane filtration mechanism (3) includes a fixed frame (34), and each of the four top corners of the fixed frame (34) is fixedly connected to an outwardly extending overlapping rod (35). The overlapping rod (35) overlaps above the top support rod (42), and a membrane assembly (36) is fixedly connected inside the fixed frame (34).

4. A compact integrated wastewater treatment device based on a coupled MBR membrane as described in claim 3, characterized in that, The membrane assembly (36) includes multiple bottom crossbars (361) and top crossbars (362) corresponding to the bottom crossbars (361). The left and right ends of the bottom crossbars (361) are fixedly connected to the fixed frame (34). The top of the multiple top crossbars (362) is connected to the water suction pipe (31). A number of filter membranes (363) are provided between each bottom crossbar (361) and the top crossbar (362).

5. A compact integrated wastewater treatment device based on a coupled MBR membrane as described in claim 4, characterized in that, The water filter membrane (363) includes membrane fibers (3631). Both the upper and lower ends of the membrane fibers (3631) are connected to a connecting tube (3632). The connecting tube (3632) at the upper end of the membrane fibers (3631) is threadedly connected to the top horizontal tube (362) and internally communicates with it. The connecting tube (3632) at the lower end of the membrane fibers (3631) is threadedly connected to the bottom horizontal bar (361).

6. A compact integrated wastewater treatment device based on a coupled MBR membrane as described in claim 1, characterized in that, The aeration device (2) includes an air pump (21) fixedly connected to the outer wall of the treatment tank (1). The air pump (21) is electrically connected to the PLC controller (8). The air outlet of the air pump (21) is connected to an air supply pipe (22). The end of the air supply pipe (22) is connected to an aeration main pipe (23). Both sides of the aeration main pipe (23) are fixedly connected to aeration branch pipes (24). The top of the aeration main pipe (23) and the aeration branch pipes (24) are fixedly connected to multiple aeration heads (25). The upper surface of the aeration head (25) is provided with aeration holes (26).

7. A compact integrated wastewater treatment device based on a coupled MBR membrane as described in claim 1, characterized in that, The sludge mixing chamber (6) includes a chamber body (61) and a stirring rod (62) rotatably connected inside the chamber body (61). A stirring motor (63) for driving the stirring rod (62) to rotate is fixedly connected to the top of the chamber body (61). The liquid inlet pump (51) and the stirring motor (63) are both electrically connected to the PLC controller (8). A sludge addition port (64) is provided on the top of the chamber body (61). A wastewater inlet (65) is fixedly connected to the left side of the chamber body (61).

8. A compact integrated wastewater treatment device based on a coupled MBR membrane as described in claim 7, characterized in that, The reflux mechanism (7) includes a reflux pump (71) fixedly connected to the outer wall of the treatment tank (1). The reflux pump (71) is electrically connected to the PLC controller (8). The inlet of the reflux pump (71) is connected to the inside of the treatment tank (1). The outlet of the reflux pump (71) is connected to a reflux pipe (72). The end of the reflux pipe (72) is fixedly connected to the right side of the chamber (61).

9. A compact integrated wastewater treatment device based on a coupled MBR membrane as described in claim 1, characterized in that, The inner wall of the treatment pool (1) is provided with multiple ultrasonic transducers (11), and the outer wall of the treatment pool (1) is fixedly connected with an ultrasonic drive power supply (12) for supplying power to the ultrasonic transducers (11).

10. A compact integrated wastewater treatment device based on a coupled MBR membrane as described in claim 1, characterized in that, The inner wall of the treatment pool (1) is provided with multiple ultrasonic transducers (11), and the outer wall of the treatment pool (1) is fixedly connected with an ultrasonic driving power supply (12) that supplies power to the ultrasonic transducers (11).

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