A new type of high-efficiency marine built-in membrane bioreactor

Abstract

The utility model discloses a novel high-efficiency marine built-in membrane biological synergistic reaction device, which relates to a marine domestic sewage treatment system, including a treatment box, a built-in membrane assembly, a discharge pump, an aeration pipe and an air pump, wherein a sewage inlet and an exhaust port are arranged on the treatment box, the aeration pipe is located below the built-in membrane assembly, and the discharge pump is connected to the water outlet of the built-in membrane assembly through a pipeline; a guide rail is arranged in the treatment box, the built-in membrane assembly includes an outer frame and a filter membrane, and the built-in membrane assembly is installed on the guide rail by sliding a seat so as to slide left and right; a reset compression spring is arranged between the right side of the built-in membrane assembly and the right side wall of the treatment box; a cam driving device which can drive the built-in membrane assembly to slide rightward on the guide rail is arranged in the treatment box on the left side of the built-in membrane assembly, and synergistic particles made of porous materials which can pass between the filter membranes of the built-in membrane assembly are arranged in the treatment box. It has the advantages that the surface of the built-in membrane is not easy to be blocked or hardened, the standard performance is stable, the service life is long, and the use cost is low.

Description

Technical Field

[0001] The utility model relates to a marine domestic sewage treatment system, in particular to a novel high-efficiency marine built-in membrane biological synergistic reaction device. Background Art

[0002] The domestic sewage treatment device of ships mainly uses microbial treatment method, and continues to use land-based pretreatment, biochemical and sedimentation treatment process systems. The system occupies a large space, and its performance is greatly affected by residence time and environmental factors.

[0003] As the requirements of laws and regulations on sewage discharge indicators become more and more stringent, there is an urgent need for a domestic sewage treatment device that meets the standards, has stable performance and occupies a small space. The built-in membrane bioreactor that organically combines membrane separation technology and biological treatment technology has come into being and is very popular. The existing built-in membrane bioreactor includes a treatment box, a built-in membrane assembly, a discharge pump, an aeration pipe and an air pump. The treatment box is provided with a sewage inlet and an exhaust port. The air pump and the discharge pump are arranged on the outside of the treatment box. The built-in membrane assembly and the aeration pipe are arranged in the treatment box. The aeration pipe is located below the built-in membrane assembly. The air pump is connected to the aeration pipe through a pipeline, and the discharge pump is connected to the outlet of the built-in membrane assembly through a pipeline. When in use, the sewage enters the treatment box from the sewage inlet, is filtered by the built-in membrane assembly, and is discharged by the discharge pump; the air pump aerates through the aeration pipe to supplement oxygen in the treatment box and provide aerobic bacteria to decompose the pollutants retained by the built-in membrane assembly. After the existing built-in membrane bioreactor has been running for a period of time, the membrane surface will become clogged or hardened, and the sewage treatment efficiency will gradually decrease, affecting the use effect. To address the above problems, backwashing or drug immersion treatment methods are usually used. The backwashing treatment method has the disadvantages of incomplete cleaning, affecting the service life, and time-consuming and labor-intensive operation; the drug immersion treatment method has the disadvantages of killing bacteria, time-consuming and labor-intensive operation, and high use cost. Summary of the invention

[0004] The purpose of the utility model is to solve the deficiencies of the above-mentioned prior art and to provide a new type of high-efficiency marine built-in membrane biological enhancement reaction device which is not easy to be blocked or hardened on the surface of the built-in membrane during operation, has stable performance, long service life and low use cost.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A novel high-efficiency marine built-in membrane biological enhancement reaction device comprises a treatment box, a built-in membrane assembly, a discharge pump, an aeration pipe and an air pump, wherein the treatment box is provided with a sewage inlet and an exhaust port, the air pump and the discharge pump are arranged outside the treatment box, the built-in membrane assembly and the aeration pipe are arranged inside the treatment box, the aeration pipe is located below the built-in membrane assembly, and the discharge pump is connected to the water outlet of the built-in membrane assembly via a pipeline; the device is characterized in that a guide rail is provided inside the treatment box, the built-in membrane assembly can be slidably installed on the guide rail, and a reset compression spring is provided between the right side of the built-in membrane assembly and the right side wall of the treatment box; a cam driving device which can drive the built-in membrane assembly to slide rightward on the guide rail is provided in the treatment box on the left side of the built-in membrane assembly, and enhancement particles made of porous material which can pass between the filter membranes of the built-in membrane assembly are provided in the treatment box.

[0007] The built-in membrane assembly described in the utility model includes an outer frame and a filter membrane. The filter membrane is fixedly installed in the outer frame. A slide seat is provided at the bottom of the outer frame. The built-in membrane assembly can be slid left and right on the guide rail via the slide seat. The cam driving device is a pneumatic driving device. The air inlet of the pneumatic driving device is connected to the air pump, and the exhaust port of the pneumatic driving device is connected to the air inlet of the aeration pipe.

[0008] The pneumatic drive device described in the utility model includes a cylindrical drive shell sealed at the top and bottom, a power output shaft is provided on the drive shell, a wind wheel is provided on the power output shaft in the drive shell, a reduction box connected to the power output shaft is provided on the outside of the drive shell, a drive cam is installed on the output shaft of the reduction box, and the rotation of the drive cam can press the built-in membrane assembly to slide to the right on the guide rail.

[0009] The pneumatic driving device described in the utility model comprises a cylindrical driving housing sealed at the top and bottom, a power output shaft is installed in the middle of the upper end of the driving housing through a bearing, a horizontal axis wind wheel is arranged on the power output shaft in the driving housing, a driving control port is arranged on the driving housing on the upper side of the horizontal axis wind wheel, and an exhaust port is arranged on the driving housing on the lower side of the horizontal axis wind wheel; a reduction box connected to the power output shaft is arranged on the upper side of the driving housing, a driving cam is installed on the output shaft of the reduction box, and the rotation of the driving cam can press the built-in membrane assembly to slide rightward on the guide rail. The driving control port is connected to the air pump, and the exhaust port is connected to the air inlet of the aeration pipe.

[0010] The outer frame of the built-in membrane assembly described in the utility model is provided with a weight-reducing float. The weight-reducing float can float in water, which can reduce the pressure of the built-in membrane assembly on the guide rail and the friction between the two, making it easier for the built-in membrane assembly to move left and right on the guide rail. A force-bearing plate that contacts and cooperates with the driving cam is provided on the left side of the outer frame.

[0011] A three-way joint is provided on the outlet of the air pump described in the utility model, and an aeration control port is provided on the driving housing on the lower side of the horizontal axis wind wheel; the first end of the three-way joint is connected to the outlet of the air pump, the second end of the three-way joint is connected to the driving control port via a driving control valve, and the third end of the three-way joint is connected to the aeration control port via an aeration control valve.

[0012] The outer side of the driving cam described in the utility model is provided with a roller that cooperates with the force plate and can rotate freely. The roller is cylindrical, and the roller is installed on the roller shaft so as to rotate freely. A plurality of roller installation grooves are provided on the outer side surface of the driving cam, and the roller is installed in the roller installation grooves via the roller shaft. The side surface of the roller protrudes from the outer side surface of the driving cam and can roll on the force plate to reduce friction.

[0013] The built-in membrane assembly described in the utility model is an MBR flat membrane assembly, which includes an outer frame and membranes arranged parallel to each other on the outer frame, and the distance between the membranes is 20-30 mm; the synergistic particles are cylindrical, with a diameter of 3-4 mm, a height of 10-20 mm, and a density of 1.0-1.10 g / cm 3 , with a specific surface area of ​​950-1250 m 2 / g.

[0014] The diameter of the aeration pipe in the utility model gradually decreases from left to right, and the size of the aeration hole is 1.5-2.5 mm. The size of the aeration pipe matches the bottom size of the built-in membrane, and the aeration hole faces the bottom of the treatment box, preferably 50-100 mm away from the built-in membrane and the bottom of the treatment box.

[0015] The processing box described in the utility model is provided with a liquid level sensor. When in use, the liquid level sensor and the discharge pump are respectively connected to the PLC controller, and the liquid level sensor controls the start and stop time of the discharge pump through the PLC feedback signal.

[0016] The synergistic particles described in the utility model are formed by high-temperature sintering of ferric chloride, manganese chloride, nickel chloride and copper oxide.

[0017] The synergistic particles described in the utility model are formed by high-temperature sintering of 33-37 parts of ferric chloride, 10-15 parts of manganese chloride, 0.6-1.1 parts of nickel chloride, 8.2-9.1 parts of copper oxide and 500-600 parts of carbon columns in proportion by weight (the carbon columns have a diameter of 3-4 mm and a height of 10-20 mm).

[0018] The specific preparation steps are as follows:

[0019] Step 1, weigh each component according to the above ratio, dissolve them in 1000 parts of ultrapure water in turn, and mix them thoroughly to form solution 1;

[0020] Step 2: Wash the carbon column with ultrapure water, bake it in an oven at 110-120°C for 6-8 hours, take it out and put it in a desiccator to cool to room temperature for later use;

[0021] Step 3: Place the carbon column obtained in step 2 in a 5% HCl solution, heat in a water bath at 85-90°C for 25-30 min, then soak and rinse with ultrapure water, adjust the pH to 7.8-8.0 with (10% NaOH), and bake in an oven at 100-110°C for 6-8h, take out and place in a desiccator to cool to room temperature for use;

[0022] Step 4: immerse the carbon column obtained in step 3 in solution 1 and stir for 15 h to make the carbon column fully contact with the solution, and then bake in an oven at 110-120°C for 4 h;

[0023] Step 5: Place the carbon column baked in step 4 into a high temperature furnace and calcine for 2.5-4 hours at 600-1000°C in the absence of oxygen to improve the utilization rate of the active components;

[0024] Step 6: Take out the carbon column calcined in step 5 and put it into a dryer to cool to room temperature to obtain enhanced particles. The porous structure on the surface of the enhanced particles has the ability to absorb pollutants, providing more growth space for microorganisms, which can effectively increase the volume load and improve the effluent water quality.

[0025] During the use of the utility model, the air pump conveys air to the aeration pipe below the built-in membrane assembly through the air intake pipe. The aeration pipe aerates and supplements oxygen in the treatment box while driving the synergistic particles to circulate from bottom to top between the diaphragms of the built-in membrane assembly; the wind wheel in the air intake pipe drives the driving cam to rotate through the transmission shaft. In the process of the large diameter side of the driving cam rotating to be opposite to the built-in membrane assembly, the built-in membrane assembly is pressed to move right on the guide rail and the reset spring is compressed. In the process of the small diameter side of the driving cam rotating to be opposite to the built-in membrane assembly, the reset spring drives the built-in membrane assembly to move left on the guide rail. In the process of the built-in membrane assembly moving left and right on the guide rail, the synergistic particles rise between the diaphragms and contact the surface of the diaphragms. Pollutants attached to the surface of the diaphragms can be contained and taken away by the porous structure on the surface of the synergistic particles and be biodegraded, thereby preventing the pollutants from being blocked or hardened on the surface of the diaphragm. During use, pollutants attached to the surface of the membrane can be removed by the efficiency-enhancing particles at any time. The membrane is not easy to be blocked, and the performance is stable and the service life is long. The air input for aeration is used as the power, which eliminates excessive manual operations, saves time and effort, and has low use costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The invention is described in detail below with reference to the accompanying drawings and specific embodiments:

[0027] Figure 1It is a structural schematic diagram of the utility model;

[0028] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the built-in membrane assembly in the utility model installed on the guide rail;

[0030] Figure 4 It is a structural schematic diagram of the cam driving device in the utility model;

[0031] Figure 5 It is a structural schematic diagram of the driving cam in the utility model;

[0032] Figure 6 yes Figure 5 AA cross-sectional view structural diagram;

[0033] Figure 7 It is a partial enlarged view of the synergistic particles of the utility model and their surface. DETAILED DESCRIPTION

[0034] like Figure 1-Figure 6The new type of high-efficiency marine built-in membrane biological enhancement reaction device shown in the figure comprises a treatment box 8, a built-in membrane assembly 10, a discharge pump 14, an aeration pipe 17 and an air pump 1. The treatment box 8 is provided with a sewage inlet 7 and an exhaust port 9. The air pump 1 and the discharge pump 14 are arranged on the outside of the treatment box 8. The built-in membrane assembly 10 and the aeration pipe 17 are arranged in the treatment box 8. The aeration pipe 17 is located below the built-in membrane assembly 10. The discharge pump 14 is connected to the water outlet of the built-in membrane assembly 10 through a pipeline; a guide rail 16 arranged in the left and right directions is arranged in the lower part of the treatment box 8. The built-in membrane assembly 10 is an MBR flat membrane assembly, which includes an outer frame 20 and membranes (filter membranes) arranged parallel to each other on the outer frame, and the distance between the membranes is 20-30 mm; the MBR flat membrane assembly is an existing mature product, and the specific structure is not repeated. A slide seat is provided at the bottom of the outer frame 20, and the built-in membrane assembly 10 can be installed on the guide rail 16 by sliding left and right through the slide seat; a connecting plate is provided on the outer frame on the right side of the built-in membrane assembly 10, and a return compression spring 15 is provided between the connecting plate and the right side wall of the processing box 8; a cam driving device that can drive the built-in membrane assembly to slide rightward on the guide rail 16 is provided in the processing box 8 on the left side of the built-in membrane assembly 10, and the cam driving device includes a cylindrical driving shell 18 sealed at the top and bottom, and a power output shaft 21 is provided on the driving shell 18. The power output shaft 21 in the driving shell 18 A wind wheel 23 is provided on the shaft, a reduction box 5 connected to the power output shaft 21 is provided on the outer side of the driving housing 18, a driving cam 6 is installed on the output shaft of the reduction box 5, and the driving cam 6 is rotated to press the built-in membrane assembly 10 to slide rightward on the guide rail 15; the air inlet of the cam driving device is connected to the air pump 1, and the exhaust port of the cam driving device is connected to the air inlet of the aeration pipe 17; the treatment box 8 is provided with synergistic particles 11 made of porous material that can pass between the filter membranes (membranes or membrane filaments) of the built-in membrane assembly, and the structure of the synergistic particles 11 is as follows Figure 7 As shown, the synergistic particles 11 are cylindrical, with a diameter of 3-4 mm, a height of 10-20 mm, a density of 1.0-1.10 g / cm3, and a specific surface area of ​​950-1250 m2 / g. The filling amount of the synergistic particles in the treatment box is such that the surface area of ​​the synergistic particles is not less than 1 / 2 of the filter membrane area of ​​the built-in membrane assembly.

[0035] The cam drive device described in the utility model comprises a cylindrical drive housing 18 sealed at the top and bottom, a power output shaft 21 is installed in the middle of the upper end of the drive housing 18 through a bearing, a horizontal shaft wind wheel 23 is arranged on the power output shaft 21 in the drive housing 18, a drive control port 22 is arranged on one side of the drive housing on the upper side of the horizontal shaft wind wheel 23, and an exhaust port 26 is arranged on one side of the drive housing on the lower side of the horizontal shaft wind wheel 23; a reduction box 5 connected to the power output shaft 21 is arranged on the upper side of the drive housing 18, a drive cam 6 is installed on the output shaft of the reduction box 5, and the rotation of the drive cam 6 can press the built-in membrane assembly to slide to the right on the guide rail. The drive control port 22 is the air inlet of the cam drive device and is connected to the air pump 1, and the exhaust port 26 is connected to the air inlet of the aeration pipe 17.

[0036] The utility model further improves the outer frame 2 of the built-in membrane assembly by connecting a weight-reducing float 12. The weight-reducing float 12 can float in the water, which can reduce the pressure of the built-in membrane assembly 10 on the guide rail 16 and reduce the friction between the two, making it easier for the built-in membrane assembly 10 to move left and right on the guide rail. A force plate 19 is provided on the left side of the outer frame 20 to contact and cooperate with the driving cam 6. Figure 1 , Figure 3 It can be seen that a limit stopper 24 is provided on the guide rail 16 on the left side of the outer frame 20. The limit stopper 24 can limit the limit position of the built-in membrane assembly sliding to the left to prevent the built-in membrane assembly from colliding or contacting with the cam driving device. The outlet of the air pump 1 is connected to a three-way joint through a one-way valve 2, and an aeration control port 25 is provided on one side of the drive housing 18 on the lower side of the horizontal axis wind wheel 23; the first end of the three-way joint is connected to the outlet of the one-way valve 2, and the one-way valve can prevent water from entering the air pump. The second end of the three-way joint is connected to the drive control port 22 through the drive control valve 4, and the third end of the three-way joint is connected to the aeration control port 25 through the aeration control valve 3; by adjusting the opening of the drive control valve 4 and the aeration control valve 3, the flow ratio of the air-driven airflow and the aeration airflow can be adjusted, and then the rotation speed of the drive cam 6 can be controlled, and the frequency of the left and right movement of the built-in membrane assembly can be controlled, which is suitable for treating sewage with different pollutant contents. The outer side of the drive cam 6 is provided with a roller 27 that cooperates with the force plate 19 and can rotate freely. The roller 27 is cylindrical and is rotatably mounted on the driving cam via a roller shaft. Figure 6 As shown, a plurality of roller mounting grooves are provided on the outer side surface of the driving cam 6, and the roller 27 is installed in the roller mounting groove via the roller shaft. A part of the side surface of the roller 27 protrudes out of the outer side surface of the driving cam 6 and can roll on the force plate 19 to reduce friction.

[0037] Further improvement, the diameter of the aeration pipe 17 gradually decreases from left to right, and the aeration pipe 17 is provided with aeration holes, and the size of the aeration holes is 1.5-2.5 mm. The size of the aeration pipe matches the size of the bottom of the built-in membrane, and the aeration holes face the bottom of the treatment box, preferably 50-100 mm away from the built-in membrane and the bottom of the treatment box. A liquid level sensor 13 is provided in the treatment box. When in use, the liquid level sensor 13 and the discharge pump 14 are respectively connected to the PLC controller, and the liquid level sensor 13 controls the start and stop time of the discharge pump through the PLC feedback signal.

[0038] The synergistic particles 11 described in the utility model are formed by high-temperature sintering of ferric chloride, manganese chloride, nickel chloride and copper oxide. The synergistic particles 11 are formed by high-temperature sintering of 33-37 parts of ferric chloride, 10-15 parts of manganese chloride, 0.6-1.1 parts of nickel chloride, 8.2-9.1 parts of copper oxide and 500-600 parts of carbon columns in proportion by weight (the diameter of the carbon columns is about 3-4 mm and the height is 10-20 mm).

[0039] The specific preparation steps are as follows:

[0040] Step 1, weigh each component according to the above ratio, dissolve them in 1000 parts of ultrapure water in turn, and mix them thoroughly to form solution 1;

[0041] Step 2: Wash the carbon column with ultrapure water, bake it in an oven at 110-120°C for 6-8 hours, take it out and put it in a desiccator to cool to room temperature for later use;

[0042] Step 3: Place the carbon column obtained in step 2 in a 5% HCl solution, heat in a water bath at 85-90°C for 25-30 min, then soak and rinse with ultrapure water, adjust the pH to 7.8-8.0 with (10% NaOH), and bake in an oven at 100-110°C for 6-8h, take out and place in a desiccator to cool to room temperature for use;

[0043] Step 4: immerse the carbon column obtained in step 3 in solution 1 and stir for 15 h to make the carbon column fully contact with the solution, and then bake in an oven at 110-120°C for 4 h;

[0044] Step 5: Place the carbon column baked in step 4 into a high temperature furnace and calcine for 2.5-4 hours at 600-1000°C in the absence of oxygen to improve the utilization rate of the active components;

[0045] Step 6: Take out the carbon column calcined in step 5 and put it into a dryer to cool to room temperature to obtain enhanced particles. The porous structure on the surface of the enhanced particles has the ability to absorb pollutants, providing more growth space for microorganisms, which can effectively increase the volume load and improve the effluent water quality.

[0046] During the use of the utility model, the air pump delivers air to the aeration pipe below the built-in membrane assembly through the air intake pipeline. The aeration pipe aerates and supplements oxygen in the treatment box while driving the synergistic particles to circulate from bottom to top between the diaphragms of the built-in membrane assembly. During the rotation of the large diameter side of the driving cam of the cam driving device to the relative position of the built-in membrane assembly, the built-in membrane assembly is pressed to move rightward on the guide rail and the reset spring is compressed. During the rotation of the small diameter side of the driving cam to the relative position of the built-in membrane assembly, the reset spring drives the built-in membrane assembly to move leftward on the guide rail. During the movement of the built-in membrane assembly left and right on the guide rail, the synergistic particles rise between the diaphragms and contact the surface of the diaphragms. The pollutants attached to the surface of the diaphragms can be carried away by the porous structure on the surface of the synergistic particles and biodegraded, thereby preventing the pollutants from clogging or hardening on the surface of the diaphragms. During use, the pollutants attached to the surface of the diaphragms can be removed by the synergistic particles at any time, and the diaphragms are not easy to clog, and the performance is stable and the service life is long. The air input for aeration is used as the power, and there is no need for excessive manual operation, which saves time and effort and has low cost.

Claims

1. A novel high-efficiency marine built-in membrane biological enhancement reaction device, comprising a treatment box, a built-in membrane module, a discharge pump, an aeration pipe and an air pump, wherein the treatment box is provided with a sewage inlet and an exhaust port, the air pump and the discharge pump are arranged outside the treatment box, the built-in membrane module and the aeration pipe are arranged inside the treatment box, the aeration pipe is located below the built-in membrane module, and the discharge pump is connected to the water outlet of the built-in membrane module via a pipeline; characterized in that: A guide rail is provided in the processing box, and the built-in membrane assembly can be installed on the guide rail so as to slide left and right. A reset compression spring is provided between the right side of the built-in membrane assembly and the right side wall of the processing box; a cam driving device which can drive the built-in membrane assembly to slide right on the guide rail is provided in the processing box on the left side of the built-in membrane assembly, and synergistic particles made of porous material which can pass between the filter membranes of the built-in membrane assembly are provided in the processing box.

2. The novel high-efficiency marine built-in membrane bioreactor according to claim 1 is characterized in that: The built-in membrane assembly includes an outer frame and a filter membrane. The filter membrane is fixedly installed in the outer frame. A slide seat is provided at the bottom of the outer frame. The built-in membrane assembly can be slid left and right on the guide rail via the slide seat. The cam driving device is a pneumatic driving device. The air inlet of the pneumatic driving device is connected to the air pump, and the exhaust port of the pneumatic driving device is connected to the air inlet of the aeration pipe.

3. The novel high-efficiency marine built-in membrane biosynergistic reaction device according to claim 2 is characterized in that: The pneumatic drive device includes a cylindrical drive shell sealed at the top and bottom, a power output shaft is provided on the drive shell, a wind wheel is provided on the power output shaft inside the drive shell, a reduction gear box connected to the power output shaft is provided on the outside of the drive shell, a drive cam is installed on the output shaft of the reduction gear box, and the rotation of the drive cam can press the built-in membrane assembly to slide to the right on the guide rail.

4. The novel high-efficiency marine built-in membrane biosynergistic reaction device according to claim 2 is characterized in that: The pneumatic drive device includes a cylindrical drive shell sealed at the top and bottom, a power output shaft is installed in the middle of the upper end of the drive shell through a bearing, a horizontal axis wind wheel is arranged on the power output shaft in the drive shell, a drive control port is arranged on the drive shell on the upper side of the horizontal axis wind wheel, and an exhaust port is arranged on the drive shell on the lower side of the horizontal axis wind wheel; a reduction box connected to the power output shaft is arranged on the upper side of the drive shell, a drive cam is installed on the output shaft of the reduction box, and the rotation of the drive cam can press the built-in membrane assembly to slide to the right on the guide rail.

5. The novel high-efficiency marine built-in membrane bioreactor according to claim 1 is characterized in that: A weight-reducing floating body is arranged on the outer frame of the built-in membrane assembly.

6. The novel high-efficiency marine built-in membrane biosynergistic reaction device according to claim 1 is characterized in that: A three-way joint is provided on the air pump outlet, and an aeration control port is provided on the drive housing on the lower side of the horizontal axis wind wheel; the first end of the three-way joint is connected to the outlet of the air pump, the second end of the three-way joint is connected to the drive control port via a drive control valve, and the third end of the three-way joint is connected to the aeration control port via an aeration control valve.

7. The novel high-efficiency marine built-in membrane biosynergistic reaction device according to claim 3 or 4 is characterized in that: The outer side of the driving cam is provided with a roller which cooperates with the force-bearing plate and can rotate freely.

8. The novel high-efficiency marine built-in membrane bioreactor according to claim 1 is characterized in that: The built-in membrane assembly is an MBR flat membrane assembly, which includes an outer frame and membranes arranged parallel to each other on the outer frame, and the distance between the membranes is 20-30 mm; the synergistic particles are cylindrical, with a diameter of 3-4 mm, a height of 10-20 mm, and a density of 1.0-1.10 g / cm 3 , with a specific surface area of ​​950-1250 m 2 / g.

9. The novel and highly efficient marine built-in membrane bioreactor according to claim 1 is characterized in that: The diameter of the aeration pipe gradually decreases from left to right, and a liquid level sensor is arranged in the processing box.

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