Integrated anaerobic digestion membrane bioreactor

Abstract

The application discloses an integrated anaerobic digestion membrane bioreactor which effectively achieves the purpose of conveniently backwashing the filter membrane, comprising an anaerobic digestion reactor for storing anaerobic microorganisms, a batching tank connected to the feeding end of the anaerobic digestion reactor, and a filtering mechanism for solid-liquid separation connected to the discharging end of the anaerobic digestion reactor, wherein the filtering mechanism comprises, from bottom to top, a feeding part, a filtering part and a discharging part which are communicated with each other, the filtering part is detachably connected with a filter box in the inside, and the filter box is detachably connected with a plurality of filter assemblies in the inside, the application has novel structure, ingenious design and simple and convenient operation, can effectively facilitate the staff to disassemble, assemble and overhaul, facilitate the staff to completely clean the inside of the filter box, facilitate the pipeline connection of different reaction processes, can automatically clean the filter membrane, facilitate the disassembly and assembly of the whole device, and facilitate the discharge of the reaction substance after backwashing.

Description

Technical Field

[0001] This invention belongs to the field of anaerobic reaction technology and relates to an integrated anaerobic digestion membrane bioreactor. Background Technology

[0002] Anaerobic digestion can simultaneously recover resources and energy, and has low operating costs, making it an ideal treatment technology. However, traditional anaerobic digestion systems suffer from problems such as long start-up times, unstable treatment effects, low methanation efficiency, and severe sludge loss. Anaerobic membrane bioreactors (AnMBRs) combine anaerobic technology with membrane separation technology, efficiently retaining pollutants, ensuring excellent effluent quality, significantly improving methanation efficiency, and achieving efficient energy recovery. In AnMBRs, ultrafiltration membranes completely separate water retention time and solid-state retention time, allowing for excellent control of biomass within the digester. This promotes the enrichment of long-generation-cycle functional bacteria (such as methanogens) in the reactor, thereby improving system stability and methane production. Furthermore, it produces high-quality effluent free of suspended solids and pathogens, eliminating the need for subsequent nitrogen and phosphorus extraction pretreatment.

[0003] However, while the high-quality water delivery of existing ultrafiltration membranes is a more competitive factor than traditional anaerobic digestion systems, they are prone to clogging during use, requiring frequent cleaning, which is very inconvenient. Therefore, there is a need for a digestive anaerobic bioreactor that allows for easy cleaning of ultrafiltration membranes to solve the above problems. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes an integrated anaerobic digestion membrane bioreactor, which effectively solves the problems in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] An integrated anaerobic digestion membrane bioreactor includes an anaerobic digestion reactor for storing anaerobic microorganisms. The feed end of the anaerobic digestion reactor is connected to a feed tank, and the discharge end of the anaerobic digestion reactor is connected to a filtration mechanism for solid-liquid separation. The filtration mechanism includes, from bottom to top, an interconnected feed section, a filtration section, and a discharge section. A filter box is detachably connected inside the filtration section, and multiple filter components are detachably connected inside the filter box. Each filter component includes a mounting frame, a filter frame, and a cleaning brush for cleaning the bottom of the filter frame. The filter frame and the cleaning brush are detachably connected inside the mounting frame.

[0007] Preferably, a first disassembly plate is provided on the rear side of the filter section, and the first disassembly plate is connected to the filter section by bolts. A first fixing plate is fixedly connected to the lower side of the filter section, and a second fixing plate is fixedly connected to the upper side of the feed section. The first fixing plate and the second fixing plate are detachably connected.

[0008] Preferably, the filter box has multiple disassembly slots on both the left and right sides, and a second disassembly plate can be detachably connected inside each disassembly slot. A box cover is detachably connected to the rear side of the filter box. The rear side of each second disassembly plate is fixedly connected to the front side of the box cover. A snap-fit ​​block is fixedly connected to the side of each second disassembly plate near the disassembly slot. A snap-fit ​​groove is provided inside each disassembly slot. The snap-fit ​​block and the snap-fit ​​groove cooperate to form a structure in which the first disassembly plate and the filter box can be detachably connected.

[0009] Preferably, a third fixing plate is fixedly connected to the upper side of the filter section, and a fourth fixing plate is fixedly connected to the lower side of the discharge section, wherein the third fixing plate and the fourth fixing plate are detachably connected.

[0010] Preferably, a filter membrane is fixedly connected to the bottom of the filter frame, and the upper side of the cleaning brush abuts against the lower side of the filter membrane.

[0011] Preferably, the lower side of the filter frame is provided with a cleaning frame that is detachably connected to the mounting frame. The cleaning frame has two sliding grooves inside, and a sliding block is slidably connected inside each sliding groove. A power plate is fixedly connected to the lower side of the cleaning brush, and the left and right sides of the power plate are respectively fixedly connected to the corresponding sliding blocks.

[0012] Preferably, the upper side of the filter frame is provided with multiple fixing bolts, and the lower side of each fixing bolt passes through the filter frame and is threadedly connected to the mounting bracket.

[0013] Preferably, the filter box is fixedly connected to an installation block, and the rear side of the installation block is provided with an installation slot corresponding to the installation frame. The front side of each installation frame is fixedly connected to a connecting block that matches the installation slot.

[0014] Preferably, the filter box is internally fixedly connected with a plurality of sliding strips for longitudinally limiting the mounting frame. Each sliding strip is inclined, such that the angle between the mounting frame and the horizontal plane is 5°-15°, and the angle between the power plate and the mounting frame is 40°-50°.

[0015] Preferably, the number of filter components is three, and the three filter components divide the interior of the filter into a first filter chamber, a second filter chamber, a third filter chamber and a fourth filter chamber from top to bottom. The mounting block has a first through groove connecting the second filter chamber and the third filter chamber, and a second through groove connecting the third filter chamber and the fourth filter chamber.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention has a cleaning rack, which can perform solid-liquid separation of reactants by setting a filter membrane on its lower side, thereby facilitating anaerobic decomposition by anaerobic microorganisms.

[0018] 2. The present invention has a discharge section connected to the biogas collector. By backwashing the biogas collected inside the biogas collector, the filter membrane on the lower side of the filter frame can be cleaned, thereby reducing the frequency of manual cleaning and making it convenient for staff to operate and use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the filtration mechanism in this invention.

[0020] Figure 2 This is a schematic diagram of the exploded structure of the present invention.

[0021] Figure 3 This is a schematic diagram showing the location of the mounting block in this invention.

[0022] Figure 4 This is a schematic diagram of the structure of the first through groove in this invention.

[0023] Figure 5 This is a schematic diagram of the structure of the filter component in this invention.

[0024] Figure 6 This is a schematic diagram of the power plate in this invention.

[0025] Figure 7 For the present invention Figure 3 A magnified view of a portion of region A in the middle.

[0026] Figure 8 This is a schematic diagram of the overall workflow of the present invention.

[0027] In the diagram: 1. Feeding section; 2. Filtering section; 3. Discharge section; 4. Filter box; 5. Filter assembly; 6. Mounting frame; 7. Filter rack; 8. Cleaning brush; 9. First disassembly plate; 10. First fixing plate; 11. Second fixing plate; 12. Disassembly groove; 13. Second disassembly plate; 14. Box cover; 15. Snap-fit ​​block; 16. Snap-fit ​​groove; 17. Third fixing plate; 18. Fourth fixing plate; 19. Filter membrane; 20. Cleaning rack; 21. Sliding groove; 22. Sliding block; 23. Power plate; 24. Fixing bolt; 25. Mounting block; 26. Mounting groove; 27. Connecting block; 28. Sliding strip; 33. First passage groove; 34. Second passage groove. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The following is in conjunction with the appendix Figures 1 to 8 The specific embodiments of the present invention will be described in further detail below.

[0030] Depend on Figures 1 to 8 As shown, the present invention includes an anaerobic digestion reactor for storing anaerobic microorganisms. The feed end of the anaerobic digestion reactor is connected to a mixing tank, and the discharge end of the anaerobic digestion reactor is connected to a filtration mechanism for solid-liquid separation. In order to facilitate backwashing of the filter frame 7, the filtration mechanism includes, from bottom to top, an interconnected feed section 1, a filter section 2, and a discharge section 3. A filter box 4 is detachably connected inside the filter section 2. Multiple filter components 5 are detachably connected inside the filter box 4. Each filter component 5 includes a mounting frame 6, a filter frame 7, and a cleaning brush 8 for cleaning the bottom of the filter frame 7. The filter frame 7 and the cleaning brush 8 are detachably connected inside the mounting frame 6. A filter membrane 19 is fixedly connected to the bottom of the filter frame 7, and the upper side of the cleaning brush 8 abuts against the lower side of the filter membrane 19.

[0031] It should be noted that the present invention also includes:

[0032] The biogas collector is connected to the upper part of the anaerobic digester to collect the biogas produced during the anaerobic digestion process. In addition, the biogas collector is also connected to an output pipe, the other end of which is connected to the upper side of the discharge section 3. A gas flow meter and a solenoid valve are installed in the middle of the output pipe to control and measure the gas output from the biogas collector to the filter section 2. A biogas circulation pipe is also connected to the side of the feed section 1, the other end of which is connected to the biogas collector as a biogas return pipe to collect the biogas after backwashing.

[0033] A membrane pressure gauge is connected to the upper side of the discharge section 3 and is used to detect the filtration pressure of the filter frame 7.

[0034] In addition, the mixing tank is equipped with a magnetic stirrer for stirring the reactants and a cooling water pipe for cooling the reactants. The reactants are transported between the mixing tank and the anaerobic digester via a feed pump.

[0035] The anaerobic digester is equipped with an agitator inside. The agitator is driven by a motor and uses an auger or discharge pump to transport the reactants upward to the lower side of the feed section 1 and continuously apply pressure upward to filter the solid-liquid separation through the filter membrane 19.

[0036] It should be noted that in this embodiment, the anaerobic digestion reactor, the filtration mechanism and the feed tank are designed as an integrated unit, forming an integrated anaerobic digestion membrane bioreactor. That is, the three are integrated into the same device, which can effectively increase the integration of the device and facilitate the assembly and movement of the integrated anaerobic digestion membrane bioreactor.

[0037] Specifically, in this embodiment, the mixing tank is 50L, and the cooling water pipe is used to maintain the mixture in the mixing tank at 3-5℃. The TS concentration of the mixture is kept constant (approximately 50 g / L), and the ratio of kitchen waste to sludge is 1:0, 3:1, 2:1, 1:1, and 0:1. After mixing in the mixing tank, the mixture enters the anaerobic digester via a feed pump. The anaerobic digester is 50L with an effective volume of 45L. It has a built-in stirrer, and the outer wall of the reactor is equipped with a heating system to maintain the temperature inside the reactor at 40-50℃. The solid retention time (SRT) is 30, 40, and 50 days, and the water retention time (HRT) is 8, 10, and 12 hours. The mixed digestate enters the feed section 1 via a lift pump. The filter membrane 19 is an ultrafiltration membrane made of PVDF, with a membrane area of ​​0.2 m² and a pore size of approximately 0.1 μm. The membrane flux is 7 L / m²·h. The mixed digestate passing through filtration section 2 enters the effluent outlet through discharge section 3, while the digestate that does not pass through the membrane module is returned to the anaerobic digester. The biogas produced by the anaerobic digester is collected in a biogas collector. A membrane pressure gauge monitors the membrane module pressure in real time. When the pressure reaches 30 kPa, the biogas output switch is activated, allowing air to enter from the top of the membrane module for backwashing. The backwashed biogas returns to the biogas collector. The backwash biogas injection rate is 74 m / h, and the time is 3 minutes.

[0038] Furthermore, by Figures 1 to 8 As shown, in order to facilitate disassembly and maintenance by staff, a first disassembly plate 9 is provided on the rear side of the filter section 2. The first disassembly plate 9 is connected to the filter section 2 by bolts. A first fixing plate 10 is fixedly connected to the lower side of the filter section 2, and a second fixing plate 11 is fixedly connected to the upper side of the feed section 1. The first fixing plate 10 and the second fixing plate 11 are detachably connected.

[0039] In use, the first disassembly plate 9 is used to seal the rear side of the filter section 2. A sealing ring is provided between the first disassembly plate 9 and the filter section 2. Fixing holes are provided on both the first fixing plate 10 and the second fixing plate 11. The first fixing plate 10 and the second fixing plate 11 are detachably connected by bolts to connect the feed section 1 and the filter section 2.

[0040] Furthermore, by Figures 1 to 8 As shown, in order to facilitate the thorough cleaning of the inside of the filter box 4 by the staff, multiple disassembly slots 12 are provided on the left and right sides of the filter box 4. A second disassembly plate 13 can be detachably connected inside each disassembly slot 12. A box cover 14 is detachably connected to the rear side of the filter box 4. The rear side of each second disassembly plate 13 is fixedly connected to the front side of the box cover 14. A snap-fit ​​block 15 is fixedly connected to the side of each second disassembly plate 13 near the disassembly slot 12. A snap-fit ​​groove 16 is provided inside each disassembly slot 12. The snap-fit ​​block 15 and the snap-fit ​​groove 16 cooperate to form a structure in which the second disassembly plate 13 and the filter box 4 can be detachably connected.

[0041] In use, the interlocking block 15 and the interlocking groove 16 enable the cover 14 to be detachably connected to the rear side of the filter box 4. It should be understood that the second detachment plate 13 is made of plastic and has a certain degree of elasticity, allowing it to undergo a certain degree of elastic deformation.

[0042] Furthermore, by Figures 1 to 8 As shown, in order to facilitate the connection of pipelines to different reaction processes, a third fixing plate 17 is fixedly connected to the upper side of the filter section 2, and a fourth fixing plate 18 is fixedly connected to the lower side of the discharge section 3. The third fixing plate 17 and the fourth fixing plate 18 are detachably connected.

[0043] It should be noted that the upper side of the discharge section 3 is provided with a backflush pipe for connecting to the gas outlet of the biogas collector, and a water outlet pipe for discharging the mixed digestate.

[0044] In use, the filter section 2 and the discharge section 3 are connected by the third fixing plate 17 and the fourth fixing plate 18. Both the third fixing plate 17 and the fourth fixing plate 18 are provided with bolt holes, and the two are detachably connected by bolts.

[0045] Furthermore, by Figures 1 to 8 As shown, in order to automatically clean the filter membrane 19, a cleaning frame 20 is provided on the lower side of the filter frame 7 and is detachably connected to the mounting frame 6. The cleaning frame 20 has two sliding grooves 21 inside, and a sliding block 22 is slidably connected inside each sliding groove 21. A power plate 23 is fixedly connected to the lower side of the cleaning brush 8, and the left and right sides of the power plate 23 are fixedly connected to the corresponding sliding blocks 22 respectively.

[0046] The filter box 4 has multiple sliding bars 28 fixedly connected inside for longitudinally limiting the mounting frame 6. Each sliding bar 28 is inclined, so that the angle between the mounting frame 6 and the horizontal plane is 5°-15°, and the angle between the power plate 23 and the mounting frame 6 is 40°-50°. Specifically, the power plate 23 is inclined forward, so that when the lower side of the filter membrane 19 is under high pressure to filter the reactants, the reactants move upward, which pushes the power plate 23 to move backward, so that the power plate 23 drives the cleaning brush to the rear side of the mounting frame 6. When biogas backflushing is performed, the gas moves downward, which pushes the power plate 23 to move forward, and then drives the cleaning brush to move forward to wipe the lower side of the filter membrane 19 and initially clean the accumulated reactants.

[0047] In use, because the power plate 23 is inclined between the mounting bracket 6, it can drive the power plate 23 to move backward or forward when the material (reactant or biogas) moves upward or downward, thereby driving the cleaning brush to move back and forth, and cleaning the lower side of the filter membrane 19 through the cleaning brush.

[0048] Furthermore, by Figures 1 to 8 As shown, in order to facilitate the assembly and disassembly of the device as a whole, the upper side of the filter frame 7 is provided with multiple fixing bolts 24, and the lower side of each fixing bolt 24 passes through the filter frame 7 and is threadedly connected to the mounting frame 6.

[0049] In use, the mounting bracket 6 and the filter bracket 7 can be fixedly connected by fixing bolts 24.

[0050] Furthermore, by Figures 1 to 8 As shown, in order to facilitate the connection of multiple mounting brackets 6, a mounting block 25 is fixedly connected inside the filter box 4. The rear side of the mounting block 25 is provided with mounting slots 26 that correspond one-to-one with the mounting brackets 6. A connecting block 27 that matches the mounting slot 26 is fixedly connected to the front side of each mounting bracket 6.

[0051] In use, each mounting bracket 6 is positioned between the corresponding sliding bars 28. When the mounting bracket 6 moves forward into place, the connecting block 27 and the mounting groove 26 will cooperate with each other, thereby fixing the position of the mounting bracket 6.

[0052] Furthermore, by Figures 1 to 8 As shown, in order to facilitate the discharge of reactants after backwashing, there are three filter components 5. The three filter components 5 divide the interior of the filter into a first filter chamber, a second filter chamber, a third filter chamber and a fourth filter chamber from top to bottom. The mounting block 25 has a first through groove 33 connecting the second filter chamber and the third filter chamber, and a second through groove 34 connecting the third filter chamber and the fourth filter chamber. Both the first through groove 33 and the second through groove 34 are equipped with one-way valves, so that biogas and reactants can only move downward through the first through groove 33 and the second through groove 34. That is, biogas and reactants can only enter the third filter chamber from the second filter chamber and enter the fourth filter chamber from the third filter chamber.

[0053] It should be understood that during high-pressure backflushing of biogas, the inner diameters of the first passage trough 33 and the second passage trough 34 are small and are only used to transport the reactants blocked on the lower side of the filter membrane 19 downward. The loss of biogas pressure is small and can still bring a suitable gas pressure difference between the upper and lower sides of each filter membrane 19, thereby clearing the blockage caused by the filter membrane 19 with backflushing gas.

[0054] In use, by setting the first passage groove 33 and the second passage groove 34, the deposits on the underside of different filter membranes 19 can be discharged in sequence, thereby extending the cleaning time.

[0055] This invention features a novel structure, ingenious design, and simple and convenient operation. Through this design, it effectively achieves the purpose of facilitating backwashing of the filter frame 7, making it convenient for staff to disassemble and repair, thoroughly clean the interior of the filter box 4, connect pipelines for different reaction processes, automatically clean the filter membrane 19, facilitate the disassembly and assembly of the entire device, and facilitate the discharge of reactants after backwashing.

[0056] Furthermore, this application integrates anaerobic digestion membrane bioreactor technology, membrane bioreactor technology, and intelligent control system into a highly integrated system for novel wastewater treatment and resource recovery. By incorporating high-pressure biogas backflushing, the carbon source in the gas re-enters the anaerobic digestion reactor during backflushing. This cleans the filter membrane 19, increases sludge breakage, accelerates organic matter degradation, and effectively improves carbon source utilization and methane production, thus achieving extremely high carbon source utilization and maximizing carbon utilization, thereby enhancing digestion rate and treatment efficiency. Additionally, this invention includes a control system. A membrane pressure gauge connected to the control system allows for real-time monitoring of the reactor status via online sensors. The control system optimizes the timing and intensity of backflushing and chemical cleaning based on changes in transmembrane pressure difference (TMP), ensuring membrane flux while reducing energy consumption and membrane loss, and guaranteeing the continuity of the treatment rate. A comparison with traditional processes is as follows:

[0057] Carbon source utilization rate The carbon content is low, and some carbon sources are lost with the effluent. Extremely high, carbon source is maximized to be converted into biogas High energy recovery rate and low operating cost Digestion rate / stability Slow, susceptible to impact, unstable Fast and extremely stable, with strong resistance to impact loads. High treatment efficiency, excellent and stable effluent quality Integration / Automation Many units, large footprint, and reliance on manual labor Highly integrated, small footprint, fully automated intelligent operation Saves space and labor, easy to deploy in a modular fashion Final output biogas, unstable effluent, large amount of sludge High-quality biogas, reusable effluent, and reduced-volume stabilized sludge A true resource-efficient factory, achieving a win-win situation for both the environment and the economy.

[0058] Therefore, this invention represents the core direction of the transformation of wastewater treatment from "energy-consuming" to "productive" and "resource-recovery" types. It is particularly suitable for the co-anaerobic digestion of high-concentration organic industrial wastewater (food, brewing, pharmaceutical, etc.), kitchen waste leachate, and urban sludge, and has huge market potential and environmental benefits.

[0059] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated anaerobic digestion membrane bioreactor, comprising an anaerobic digestion reactor for storing anaerobic microorganisms, a feed tank connected to the feed end of the anaerobic digestion reactor, and a filtration mechanism for solid-liquid separation connected to the discharge end of the anaerobic digestion reactor, characterized in that: The filtration mechanism includes, from bottom to top, a feeding section (1), a filtering section (2), and a discharging section (3) that are interconnected. The filtering section (2) has a filter box (4) that is detachably connected inside. The filter box (4) has multiple filter components (5) that are detachably connected inside. Each filter component (5) includes a mounting frame (6), a filter frame (7), and a cleaning brush (8) for cleaning the bottom of the filter frame (7). The filter frame (7) and the cleaning brush (8) are detachably connected inside the mounting frame (6). It also includes: a biogas collector, with a backflush pipe on the upper side of the discharge section (3) for connecting the gas outlet of the biogas collector; The filter frame (7) has a cleaning frame (20) that is detachably connected to the mounting frame (6) on its lower side. The cleaning frame (20) has two sliding grooves (21) inside, and each sliding groove (21) has a sliding block (22) slidably connected inside. The cleaning brush (8) has a power plate (23) fixedly connected to its lower side. The left and right sides of the power plate (23) are fixedly connected to the corresponding sliding blocks (22) respectively. The filter box (4) is internally fixedly connected with multiple sliding bars (28) for longitudinally limiting the mounting frame (6). Each sliding bar (28) is inclined so that the angle between the mounting frame (6) and the horizontal plane is 5°-15° and the angle between the power plate (23) and the mounting frame (6) is 40°-50°.

2. The integrated anaerobic digestion membrane bioreactor according to claim 1, characterized in that: The filter section (2) has a first disassembly plate (9) on its rear side. The first disassembly plate (9) is connected to the filter section (2) by bolts. The filter section (2) has a first fixing plate (10) fixedly connected to its lower side. The feed section (1) has a second fixing plate (11) fixedly connected to its upper side. The first fixing plate (10) and the second fixing plate (11) are detachably connected.

3. The integrated anaerobic digestion membrane bioreactor according to claim 1, characterized in that: The filter box (4) has multiple disassembly slots (12) on its left and right sides. Each disassembly slot (12) has a second disassembly plate (13) that can be detachably connected inside. The filter box (4) has a cover (14) that can be detachably connected to its rear side. The rear side of each second disassembly plate (13) is fixedly connected to the front side of the cover (14). Each second disassembly plate (13) has a snap-fit ​​block (15) fixedly connected to the side of the disassembly slot (12). Each disassembly slot (12) has a snap-fit ​​groove (16) inside. The snap-fit ​​block (15) and the snap-fit ​​groove (16) cooperate to form a structure in which the second disassembly plate (13) and the filter box (4) can be detachably connected.

4. The integrated anaerobic digestion membrane bioreactor according to claim 1, characterized in that: The upper side of the filter section (2) is fixedly connected to a third fixing plate (17), and the lower side of the discharge section (3) is fixedly connected to a fourth fixing plate (18). The third fixing plate (17) and the fourth fixing plate (18) are detachably connected.

5. The integrated anaerobic digestion membrane bioreactor according to claim 1, characterized in that: The bottom of the filter frame (7) is fixedly connected to a filter membrane (19), and the upper side of the cleaning brush (8) abuts against the lower side of the filter membrane (19).

6. The integrated anaerobic digestion membrane bioreactor according to claim 1, characterized in that: The filter frame (7) is provided with a plurality of fixing bolts (24) on its upper side, and the lower side of each fixing bolt (24) passes through the filter frame (7) and is threadedly connected to the mounting frame (6).

7. The integrated anaerobic digestion membrane bioreactor according to claim 1, characterized in that: The filter box (4) is fixedly connected to the interior of the filter box (4). The rear side of the filter box (25) is provided with a mounting groove (26) that corresponds to the mounting frame (6). The front side of each mounting frame (6) is fixedly connected with a connecting block (27) that is compatible with the mounting groove (26).

8. The integrated anaerobic digestion membrane bioreactor according to claim 7, characterized in that: The number of filter components (5) is three. The three filter components (5) divide the interior of the filter into a first filter chamber, a second filter chamber, a third filter chamber and a fourth filter chamber from top to bottom. The mounting block (25) has a first through groove (33) connecting the second filter chamber and the third filter chamber. The mounting block (25) has a second through groove (34) connecting the third filter chamber and the fourth filter chamber.

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