Integrated anaerobic vibrating membrane bioreactor device

Abstract

The utility model discloses an integrated anaerobic vibrating membrane bioreactor device which comprises an anaerobic vibrating membrane bioreactor body, the reactor body comprises an anaerobic biological reaction area and a three-phase separator from bottom to top, a membrane assembly is arranged in the three-phase separator, a water inlet is formed in the bottom of the anaerobic biological reaction area, a Y-shaped connector is arranged at the bottom of the water inlet, and a water outlet is formed in the bottom of the Y-shaped connector. A motor and an eccentric wheel are arranged above the membrane assembly, an online pH detector and an exhaust port are arranged on a top cover plate of the three-phase separator, a biogas collecting device is arranged above the exhaust port, one end of a water outlet pipe is connected with the membrane assembly, and the other end of the water outlet pipe is connected with a water outlet barrel. And a transmembrane pressure difference on-line monitoring system is arranged, and effluent of the clarification area of the three-phase separator returns to the bottom of the reactor through a return pipe. The anaerobic vibrating membrane bioreactor can effectively reduce membrane pollution, reduce membrane cleaning frequency, prolong the service life of the membrane, reduce occupied area and reduce energy consumption.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to an integrated anaerobic vibrating membrane bioreactor device. Background Art

[0002] The anaerobic membrane bioreactor (AnMBR) is a novel water treatment technology that combines anaerobic biotechnology with high-efficiency membrane separation technology. It utilizes the membrane's filtration and interception effect to completely separate the HRT and SRT. While effectively removing pollutants, it also retains large organic molecules within the reactor, overcoming the biomass loss problem associated with traditional biological treatment technologies. Compared to other anaerobic biological treatment technologies, AnMBR exhibits excellent system stability, superior COD removal (average COD removal efficiency exceeding 90%), and high methane conversion rates (typically between 70-90%).

[0003] However, membrane fouling is an inevitable problem in membrane bioreactor operation. The three-phase separator of the expanded granular sludge blanket (EGSB) reactor can achieve gas-liquid-solid separation. Combining AnMBR with EGSB can retain sludge within the EGSB reactor, resulting in a lower sludge concentration in the membrane unit and mitigating membrane fouling.

[0004] AnMBR can be divided into split AnMBR and integrated AnMBR. The membrane components and reactors of the split AnMBR operate independently without interfering with each other, which is conducive to the cleaning, replacement and expansion of equipment, but it occupies a large area and has high energy consumption. The integrated AnMBR installs the membrane components and reactors together, which can reduce the floor space and energy consumption. At the same time, there are also problems such as serious membrane fouling and difficulty in membrane cleaning. Therefore, an improved technology is urgently needed to solve the serious membrane fouling problem of the integrated AnMBR. Utility Model Content

[0005] The purpose of the utility model is to provide an integrated anaerobic vibrating membrane bioreactor device to solve the above problems.

[0006] The utility model provides the following technical solution: an integrated anaerobic vibrating membrane bioreactor device, comprising a reactor body, a water inlet bucket, a water inlet pump, a reflux pump, a water outlet pump, a water outlet bucket, a constant temperature heating system, a biogas collection device, an online pH detector, and an online transmembrane pressure differential monitoring system. The reactor body is provided with a water inlet, a water outlet, an exhaust port, and a clarification zone outlet. The interior of the reactor body comprises, from bottom to top, an anaerobic bioreactor zone and a three-phase separator, which is internally provided with a membrane assembly.

[0007] The membrane assembly, the motor and the eccentric wheel constitute a vibrating membrane device.

[0008] Preferably, a water inlet is provided at the bottom of the anaerobic biological reaction zone, a Y-shaped joint is provided at the bottom of the water inlet, one side of the Y-shaped joint is connected to the water inlet pipe, a water inlet pump is provided between the water inlet pipe and the water inlet bucket, the other side of the Y-shaped joint is connected to the return pipe, a return pump is provided on the return pipe, and the water outlet from the clarification zone outlet flows back to the bottom of the reactor through the return pipe.

[0009] Preferably, an online pH detector, a water outlet, and an exhaust port are provided on the top cover plate of the three-phase separator, and a biogas collecting device is provided above the exhaust port.

[0010] Preferably, the membrane assembly is connected to the water outlet bucket via a water outlet pipe, a water outlet pump is provided on the water outlet pipe, and an online monitoring system for transmembrane pressure difference is provided between the water outlet pump and the membrane assembly.

[0011] Preferably, the membrane assembly is a hollow fiber membrane or a flat membrane.

[0012] Preferably, a constant temperature heating system is provided outside the anaerobic biological reaction zone, one end of the constant temperature heating system is connected to the upper part of the anaerobic biological reaction zone, and the other end of the constant temperature heating system is connected to the lower part of the anaerobic biological reaction zone.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The anaerobic vibrating membrane bioreactor can effectively reduce membrane pollution, reduce the frequency of membrane cleaning, and extend the service life of the membrane, while reducing floor space and energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the anaerobic vibrating membrane bioreactor of the utility model;

[0016] Figure 2 This is a schematic diagram of the membrane component structure of the utility model.

[0017] In the figure: 1. Anaerobic vibrating membrane bioreactor; 2. Water inlet bucket; 3. Water inlet pump; 4. Water inlet; 5. Anaerobic bioreactor zone; 6. Constant temperature heating system; 7. Three-phase separator; 8. Water outlet; 9. Exhaust port; 10. Clarification zone outlet; 11. Membrane assembly; 12. Motor; 13. Biogas collection device; 14. Online pH detector; 15. Transmembrane pressure difference online monitoring system; 16. Water outlet pump; 17. Water outlet bucket; 18. Reflux pump; 19. Reactor body; 20. Eccentric wheel. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-2 The utility model provides a technical solution: an integrated anaerobic vibrating membrane bioreactor device, the anaerobic vibrating membrane bioreactor device 1 consists of a reactor body 19, a water inlet bucket 2, a water inlet pump 3, a reflux pump 18, a water outlet pump 16, a water outlet bucket 17, a constant temperature heating system 6, a biogas collection device 13, an online pH detector 14 and a transmembrane pressure difference online monitoring system 15. The reactor body 19 is provided with a water inlet 4, a water outlet 8, an exhaust port 9, and a clarification zone outlet 10. The interior of the reactor body includes an anaerobic biological reaction zone 5 and a three-phase separator 7 from bottom to top, and a membrane assembly 11 is provided inside the three-phase separator.

[0020] The membrane assembly 11, the motor 12 and the eccentric wheel 20 constitute a vibrating membrane device.

[0021] A water inlet 4 is provided at the bottom of the anaerobic biological reaction zone 5, and a Y-shaped joint is provided at the bottom of the water inlet 4. One side of the Y-shaped joint is connected to the water inlet pipe, and a water inlet pump 3 is provided between the water inlet pipe and the water inlet bucket 2. The other side of the Y-shaped joint is connected to the reflux pipe, and a reflux pump 18 is provided on the reflux pipe. The water out of the clarification zone outlet 10 is returned to the bottom of the reactor through the reflux pump and the reflux pipe.

[0022] The expanded granular sludge bed has a large aspect ratio, and the three-phase separator 7 can achieve gas-liquid-solid three-phase separation, intercepting the sewage containing a large amount of granular sludge at the bottom, while the clearer effluent from the upper layer that has been biologically treated with anaerobic granular sludge enters the membrane assembly 11, thereby effectively reducing membrane pollution.

[0023] The membrane assembly 11 is connected to a motor 12. An eccentric 20 rotates the membrane assembly 11 slightly in the water, creating vibrations and forming a vibrating membrane device. This creates relative motion between the membrane filaments and the water, increasing the shear force of the membrane device. This reduces the deposition of contaminants on the membrane surface / pores and promptly vibrates any deposited contaminants off the membrane surface / pores, ultimately mitigating membrane fouling. The amplitude of membrane vibration can be adjusted by adjusting the size of the eccentric 20, while the frequency can be adjusted by adjusting the speed of the motor 12.

[0024] The membrane assembly 11 can be a flat membrane or a hollow fiber membrane. The present invention takes the hollow fiber membrane as an example.

[0025] The membrane assembly 11 is connected to a water outlet bucket 17 via a water outlet pipe. A water outlet pump 18 is provided on the water outlet pipe. An online transmembrane pressure difference monitoring system 15 is provided between the water outlet pump 18 and the membrane assembly 11 .

[0026] The transmembrane pressure difference online monitoring system 15 is used to monitor the membrane fouling condition. When the transmembrane pressure difference is less than 15KPa, the vibration frequency is set to 0.25Hz; when the transmembrane pressure difference is 15-30KPa, the vibration frequency is set to 0.50Hz; when the transmembrane pressure difference is greater than 30KPa, the vibration frequency is set to 0.75Hz. The vibration frequency is adjusted according to the transmembrane pressure difference to timely and effectively control membrane fouling, reduce the frequency of membrane cleaning, and extend the service life of the membrane.

[0027] A constant temperature heating device 6 is provided, one end of which is connected to the upper part of the anaerobic biological reaction zone 5, and the other end is connected to the lower part of the anaerobic biological reaction zone 5 to maintain the temperature of the reactor during anaerobic digestion. The temperature can be adjusted according to the requirements of the sewage treatment process and is suitable for high temperature anaerobic (50±2℃), medium temperature anaerobic (35±2℃) and low temperature anaerobic (15±2℃).

[0028] An online pH detector 14 and an exhaust port 9 are further provided on the top cover of the three-phase separator 7 , and a biogas collecting device 13 is provided above the exhaust port 9 .

[0029] The online pH detector 14 is located at the top of the reactor and is used to detect pH in real time and monitor the stability of the system.

[0030] The biogas collecting device 13 is provided at the top of the three-phase separator 7 and is used to collect the biogas generated during the anaerobic biological treatment of sewage.

[0031] A reflux pump is provided after the outlet of the clarification zone to return the effluent to the anaerobic biological reaction zone 5 for further treatment to improve the effluent quality.

[0032] Working process: When the anaerobic vibrating membrane bioreactor device is started, the motor 12 is turned on, and the sewage is pumped into the reactor from the water inlet 4, passing through from bottom to top, first through anaerobic sludge biodegradation in the anaerobic biological reaction zone 5, and then reaches the three-phase separator 7 at the top together with the generated gas for gas-liquid-solid three-phase separation. The mixed liquid after anaerobic biological treatment is further treated by the reflux pump 18 from the clarification zone outlet 10 to the anaerobic biological reaction zone 5. The treated water in the clarification zone is further filtered and purified by the membrane assembly 11, and the generated biogas is collected by the biogas collection device 13. The treated sewage is pumped out and collected by the outlet pump 16.

[0033] During the operation of the reactor, the transmembrane pressure difference is monitored online 15 and the pH is detected online 14 in real time to maintain the stability of the reactor. When the transmembrane pressure difference is less than 15KPa, the motor vibration frequency is 0.25Hz; when the transmembrane pressure difference is 15-30KPa, the motor vibration frequency is 0.50Hz; when the transmembrane pressure difference is greater than 30KPa, the motor vibration frequency is 0.75Hz. The vibration frequency is adjusted according to the transmembrane pressure difference. In this way, the pollutants deposited in the membrane pores of the membrane bioreactor can be vibrated off in a timely and effective manner, thereby controlling membrane fouling and extending the service life of the membrane components.

[0034] The anaerobic vibrating membrane bioreactor device can effectively reduce membrane pollution, reduce the frequency of membrane cleaning, and extend the service life of the membrane, while reducing the floor space and lowering energy consumption.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated anaerobic vibrating membrane bioreactor device, characterized by: The anaerobic vibrating membrane bioreactor device (1) is composed of a reactor body (19), a water inlet bucket (2), a water inlet pump (3), a reflux pump (18), a water outlet pump (16), a water outlet bucket (17), a biogas collection device (13), a constant temperature heating system (6), an online pH detector (14), and a transmembrane pressure difference online monitoring system (15); the reactor body (19) is provided with a water inlet (4), a water outlet (8), an exhaust port (9), and a clarification zone outlet (10); the interior of the reactor body comprises, from bottom to top, an anaerobic biological reaction zone (5) and a three-phase separator (7); and the interior of the three-phase separator is provided with a membrane assembly (11); The membrane assembly (11), the motor (12) and the eccentric wheel (20) constitute a vibrating membrane device.

2. The integrated anaerobic vibrating membrane bioreactor device according to claim 1, characterized in that: The bottom of the anaerobic biological reaction zone (5) is provided with a water inlet (4), the bottom of the water inlet (4) is provided with a Y-shaped joint, one side of the Y-shaped joint is connected to the water inlet pipe, a water inlet pump (3) is provided between the water inlet pipe and the water inlet bucket (2), the other side of the Y-shaped joint is connected to the return pipe, the return pipe is provided with a return pump (18), and the water out of the clarification zone water outlet (10) is returned to the bottom of the reactor through the return pump and the return pipe.

3. The integrated anaerobic vibrating membrane bioreactor device according to claim 1, characterized in that: An online pH detector (14), a water outlet (8), and an exhaust port (9) are provided on the top cover plate of the three-phase separator (7), and a biogas collecting device (13) is provided above the exhaust port (9).

4. The integrated anaerobic vibrating membrane bioreactor device according to claim 1, characterized in that: The membrane assembly (11) is connected to a water outlet bucket (17) via a water outlet pipe, a water outlet pump (16) is provided on the water outlet pipe, and a transmembrane pressure difference online monitoring system (15) is provided between the water outlet pump and the membrane assembly.

5. The integrated anaerobic vibrating membrane bioreactor device according to claim 1, characterized in that: The membrane assembly (11) is a hollow fiber membrane or a flat membrane.

6. The integrated anaerobic vibrating membrane bioreactor device according to claim 1, characterized in that: A constant temperature heating system (6) is provided outside the anaerobic biological reaction zone (5), one end of the constant temperature heating system (6) is connected to the upper part of the anaerobic biological reaction zone (5), and the other end of the constant temperature heating system (6) is connected to the lower part of the anaerobic biological reaction zone (5).

Images