A / O and MBR membrane bioreactor for swine wastewater treatment

Abstract

The invention belongs to the technical field of wastewater treatment, and particularly relates to an A / O and MBR (Membrane Biological Reactor) for swine wastewater treatment, which aims at solving the problems that in the prior art, during wastewater treatment, the growth of aerobic bacteria is easily promoted, and multi-stage filtration is difficult to realize, and comprises a base, and two vertical plates are symmetrically and fixedly mounted on one side of the top of the base; and the tops of the two vertical plates are fixedly provided with the same impurity removal box, an impurity removal plate is arranged in the impurity removal box, a plurality of impurity removal holes are formed in the impurity removal plate at equal intervals, and the top of the impurity removal plate extends to the upper portion of the impurity removal box and is fixedly provided with a hanging plate. According to the present invention, the biological membrane filter plates are arranged so as to perform anaerobic reaction and aerobic reaction on the wastewater, such that the aerobic bacteria and the anaerobic bacteria of the wastewater can be removed in advance, and during the wastewater filtration, the plurality of biological membrane filter plates are arranged so as to perform multi-stage filtration on the wastewater, such that the cleanliness of the treated wastewater is substantially improved.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to an A / O and MBR membrane bioreactor for piggery wastewater treatment. Background Art

[0002] In recent years, with the large-scale and intensive development of pig farming, the problem of water pollution caused by wastewater generated during the breeding process has become increasingly serious. Pig wastewater mainly comes from pig feces, pig urine and pigpen flushing water, which contains a large amount of organic pollutants, ammonia nitrogen, total phosphorus, disease and insect eggs, etc. If it is discharged directly into rivers and lakes without treatment, high concentrations of organic matter will decompose and consume a large amount of oxygen in the water, causing a large number of fish and other aquatic animals in the water to die. At the same time, the random discharge of pig wastewater can easily cause shallow groundwater pollution, seriously affecting the health of people in areas that use groundwater as domestic water, and will cause serious environmental pollution.

[0003] At present, before discharging pig farm wastewater, it is necessary to treat the wastewater first. However, the treatment devices currently used, such as the pig farm wastewater treatment device with announcement number CN208649058U, still have the following deficiencies in actual use:

[0004] 1. The above technical solution promotes the growth of microorganisms by supplementing oxygen when treating wastewater to eliminate sludge in the wastewater. However, wastewater is prone to breed aerobic bacteria in an environment with sufficient oxygen, so it is difficult to completely remove bacteria in the wastewater.

[0005] 2. Furthermore, this technical solution cannot achieve multi-stage filtration of wastewater, so during the wastewater treatment process, the cleanliness of the treated wastewater cannot be guaranteed.

[0006] In view of the above problems, the present invention document proposes an A / O and MBR membrane bioreactor for treating pig wastewater. Summary of the invention

[0007] The invention provides an A / O and MBR membrane bioreactor for treating piggery wastewater, which solves the shortcomings of the prior art that aerobic bacteria are easily grown and multi-stage filtration of wastewater is difficult to achieve when treating wastewater.

[0008] The present invention provides the following technical solutions:

[0009] An A / O and MBR membrane bioreactor for pig wastewater treatment, comprising a base, two vertical plates are symmetrically fixedly installed on one side of the top of the base, and the same impurity removal box is fixedly installed on the top of the two vertical plates, an impurity removal plate is arranged in the impurity removal box, a plurality of impurity removal holes are opened at equal intervals on the impurity removal plate, the top of the impurity removal plate extends to the top of the impurity removal box and is fixedly installed with a hanging plate, the hanging plate is clamped on the top of the impurity removal box, a positioning bar is fixedly installed on one side of the bottom of the impurity removal plate, a limiting bar is fixedly installed on one side of the inner wall of the impurity removal box, and the positioning bar and the limiting bar are clamped, characterized in that the reactor also includes:

[0010] A reaction mechanism, the reaction mechanism is installed on the top of the base, one side of the reaction mechanism extends into the impurity removal box and is connected to the bottom inner wall of the impurity removal box, and the reaction mechanism is used to perform anoxic reaction and aerobic reaction on the wastewater;

[0011] A deoxygenation mechanism is installed on the reaction mechanism and is used to discharge oxygen when the wastewater undergoes an anaerobic reaction;

[0012] The filtering mechanism is installed on the top of the base, the filtering mechanism is connected to the deoxygenation mechanism, and the filtering mechanism is used for biofilm filtration of wastewater after aerobic reaction and anaerobic reaction.

[0013] In a possible design, the reaction mechanism includes a delivery pump and a reaction box respectively fixedly mounted on the top of the base, the delivery pump is located between the impurity removal box and the reaction box, a downpipe is fixedly mounted on the suction end of the delivery pump, the top of the downpipe extends into the impurity removal box and is fixedly connected to the bottom inner wall of the impurity removal box, a delivery pipe is fixedly mounted on the output end of the delivery pump, the top of the delivery pipe extends into the reaction box and is fixedly connected to the inner wall of the top of one side of the reaction box, a one-way valve is fixedly mounted in the delivery pipe, a partition is fixedly mounted in the reaction box, a plurality of vents are evenly spaced on the inner wall of the reaction box, all of which are located below the partition, a flow hole is opened on the partition, a sealing ring connected to the flow hole is fixedly mounted on the bottom of the partition, a dispersion component is mounted on the top of the reaction box, the bottom of the dispersion component extends into the reaction box, the dispersion component respectively penetrates the flow hole and the sealing ring and fits with the inner wall of the sealing ring, the dispersion component is used to centrifugally disperse the wastewater, the deoxygenation mechanism is mounted on the reaction box, one side of the filtering mechanism extends into the reaction box and is connected to the inner wall of the bottom of the other side of the reaction box.

[0014] In one possible design, the dispersion component includes a transmission ring rotatably connected to the top of the reaction box, two slots are symmetrically provided on the top of the transmission ring, a rotating shaft is arranged through the transmission ring, the bottom end of the rotating shaft passes through the flow hole and the sealing ring and extends to the bottom of the sealing ring, clamping plates are fixedly installed on the top of both sides of the rotating shaft, the clamping plates are movably mounted in the corresponding slots, a fixed sleeve on the transmission ring is provided with a driven bevel gear, a driving motor is fixedly installed on one side of the top of the reaction box, an active bevel gear is fixedly installed on the output shaft of the driving motor, the active bevel gear is meshed with the driven bevel gear, a fixed sleeve on the rotating shaft is provided with a sealing disk, the sealing disks pass through the flow hole and the sealing ring respectively and fit tightly with the flow hole and the sealing ring respectively, and two dispersion disks are fixedly provided on the rotating shaft, and the two dispersion disks are respectively located above and below the partition.

[0015] In a possible design, a mounting frame is fixedly installed on the other side of the top of the reaction box, a movable plate is slidably connected inside the mounting frame, one side of the movable plate extends to the outside of the mounting frame, the top of the rotating shaft is rotatably connected to the bottom of the movable plate, and a first electric push rod is fixedly installed on the top of the mounting frame, and the output shaft of the first electric push rod extends into the mounting frame and is fixedly connected to the top of the movable plate.

[0016] In a possible design, the deoxygenation mechanism includes a first support tube and a second support tube respectively fixedly mounted on the top inner walls on both sides of the reaction box, the ends of the first support tube and the second support tube away from each other extend to the outside of both sides of the reaction box respectively, an exhaust hood is fixedly mounted on one end of the second support tube, a first gas supply hood is slidably connected through the first support tube, first gas supply holes are provided on the top inner wall and the bottom inner wall of the first gas supply hood, a second gas supply hood is slidably connected through the second support tube, second gas supply holes are provided on the top inner wall and the bottom inner wall of the second gas supply hood, a mounting ring located in the reaction box is fixedly mounted on the side where the first gas supply hood and the second gas supply hood are close to each other, a positioning assembly is mounted on the top of the reaction box, the positioning assembly is connected to the first gas supply hood, a gas supply assembly is connected to the positioning assembly, and the gas supply assembly is respectively connected to the first gas supply hood and the transmission ring.

[0017] In one possible design, the positioning assembly includes a support frame fixedly mounted on the top of the reaction box, a movable frame is slidably connected to the support frame, a movable hole is opened on the support frame, a mounting plate is fixedly mounted on the bottom of the movable frame, the bottom of the mounting plate passes through the movable hole and extends to the bottom of the support frame, the mounting plate is fixedly sleeved on the first gas supply hood, a second electric push rod is fixedly mounted on one side of the support frame, the output shaft of the second electric push rod passes through the support frame and is fixedly connected to one side of the movable frame, and the gas supply assembly passes through the movable frame and is connected to the movable frame.

[0018] In a possible design, the air delivery assembly includes a power box fixedly mounted on one side of the opening of the first air delivery hood, the power box is connected to the first air delivery hood, an air connecting pipe is fixedly mounted on an inner wall of one side of the power box, one end of the air connecting pipe extends to the outside of the power box, a blade shaft is rotatably connected in the power box, an air suction blade is fixedly mounted on one end of the blade shaft, a driving bevel gear is fixedly mounted on the other end of the blade shaft, a transmission shaft is rotatably connected through the movable frame, the bottom end of the transmission shaft extends into the power box and is fixedly mounted with a connecting bevel gear, the connecting bevel gear is meshed with the driving bevel gear, a driving shaft is rotatably connected on the movable frame, a driven gear is fixedly mounted on the top end of the driving shaft, a driving gear is fixedly mounted on the transmission ring, the driving gear is meshed with the driven gear, both the driving shaft and the transmission shaft are fixedly mounted with synchronous wheels, and the transmission sleeves on the two synchronous wheels are provided with the same synchronous belt.

[0019] In one possible design, the filtering mechanism includes a sewage pipe fixedly installed on the bottom inner wall of one side of the reaction box, one end of the sewage pipe extends to the outside of the reaction box, a booster pump is fixedly installed on the top of the base, one end of the sewage pipe is connected to the suction end of the booster pump, a flow pipe is fixedly installed on the output end of the booster pump, a filter box is fixedly installed on the top of the base, a cover plate is clamped on the top of the filter box, the top of the flow pipe extends into the filter box and is fixedly connected to the top inner wall of one side of the filter box, a grid plate is fixedly installed in the filter box, two mounting rods are symmetrically fixedly installed on one side of the bottom of the cover plate, the bottom ends of the two mounting rods extend into the filter box and are fixedly installed with the same support plate, the support plate contacts the corresponding inner wall of the filter box and one side of the grid plate, an external pipe is fixedly installed on the bottom inner wall of the other side of the filter box, a plurality of biofilm filter plates are fixedly installed at equal intervals on the bottom of the cover plate, a plurality of limit frames are fixedly installed at equal intervals in the filter box, and the biofilm filter plates are engaged with the corresponding limit frames.

[0020] In a possible design, the top of the cover plate is rotatably connected to a fixed shaft, two hooks are fixedly sleeved on the fixed shaft, and clamping rods are fixedly installed on the tops of both sides of the filter box, and the hooks are clamped with the corresponding clamping rods.

[0021] In a possible design, a limit cover is fixedly installed on the fixed shaft, a plug plate is slidably connected inside the limit cover, a locking plate is fixedly installed on the top of the cover plate, a plug hole is provided on the locking plate, one side of the plug plate passes through the plug hole and is clamped with the plug hole, an adjustment hole is provided on the top inner wall of the limit cover, a handle is fixedly installed on the top of the plug plate, the top of the handle passes through the adjustment hole and extends to the top of the limit cover, a compression spring is fixedly installed on the other side of the plug plate, and one end of the compression spring is fixedly connected to one side inner wall of the limit cover.

[0022] It is to be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] In the present invention, by means of the reaction mechanism, wastewater used for pig farming can be put into the impurity removal box, and after the large solid particles contained in the wastewater are filtered by the impurity removal plate, the delivery pump can be started to extract the wastewater in the impurity removal box, and the wastewater is delivered to the reaction box through the delivery pipe. At this time, the flow hole can be blocked, and then the deoxygenation mechanism is started to remove the oxygen above the partition, so that the wastewater can be reacted and purified in an anaerobic environment, and aerobic bacteria in the wastewater can be killed;

[0025] And the flow hole and the sealing ring are blocked by the sealing disk, so that the wastewater can fall on the top of the partition after being transported to the reaction box. At this time, the area above the partition is deoxygenated by the deoxygenation mechanism, so that the wastewater can react in an anaerobic environment, and the driving bevel gear can be driven to rotate by starting the driving motor. At this time, under the meshing transmission action with the driven bevel gear, the transmission ring can be driven to rotate, so that the rotating shaft can be driven to rotate through the clamping connection with the two clamping plates, and the dispersion disk can be driven to rotate. When the dispersion disk rotates, the wastewater can be centrifugally dispersed. At this time, when the oxygen is discharged, the oxygen in the wastewater can be quickly released and discharged by dispersing the wastewater, so that the wastewater can react anaerobicly;

[0026] At the same time, by starting the first electric push rod, the movable plate can be driven to move longitudinally, and at this time, the rotating shaft can be driven to move longitudinally. After the anaerobic reaction of the wastewater is completed, the rotating shaft can drive the sealing plate to move upward when moving upward. At this time, the flow hole and the sealing ring are opened, and the wastewater can flow to the bottom of the partition through the flow hole and the sealing ring, so that the wastewater can undergo aerobic reaction;

[0027] In the present invention, through the deoxygenation mechanism, the gas delivery component can be used to connect with the external nitrogen gas delivery pipeline, and then the positioning component can be started to drive the first gas delivery hood to move. At this time, under the drive of the mounting ring, the second gas delivery hood can be driven to move, so that the two first gas delivery holes are connected to the reaction box, and the two second gas delivery holes are connected to the exhaust hood. Then, under the transmission action of the gas delivery component, nitrogen can be delivered to the reaction box. As the volume of nitrogen increases, and the molecular mass of nitrogen is larger than that of oxygen, the oxygen in the reaction box can be squeezed out, so that the oxygen is discharged through the second gas delivery hood and the two second gas delivery holes, so that the wastewater can react in an oxygen-free environment;

[0028] In the present invention, through the filtering mechanism set up, the wastewater after aerobic reaction can be pumped out of the reaction box by starting the booster pump, and then can be transported to the filter box. At this time, the wastewater is pre-filtered using a grid plate, and then the wastewater keeps flowing, and can be filtered using multiple biofilm filter plates, so that the pig farming wastewater can be purified and filtered.

[0029] The present invention can realize anaerobic reaction and aerobic reaction of the wastewater before biofilm filtration of the pig farming wastewater, so as to remove aerobic bacteria and anaerobic bacteria in the wastewater in advance, and when filtering the wastewater, multiple biofilm filter plates are set up, so that the wastewater can be filtered in multiple stages, so that the cleanliness of the treated wastewater is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A three-dimensional schematic diagram of the first-view structure of an A / O and MBR membrane bioreactor for piggery wastewater treatment provided by an embodiment of the present invention;

[0031] Figure 2 A three-dimensional schematic diagram of the structure of the A / O and MBR membrane bioreactor for piggery wastewater treatment provided by an embodiment of the present invention from a second perspective;

[0032] Figure 3 A three-dimensional schematic diagram of the separation structure of the impurity removal box and impurity removal plate of the A / O and MBR membrane bioreactor for piggery wastewater treatment provided by the embodiment of the present invention;

[0033] Figure 4 A three-dimensional schematic diagram of the cross-sectional structure of the reaction box of the A / O and MBR membrane bioreactor for piggery wastewater treatment provided by the embodiment of the present invention;

[0034] Figure 5 A three-dimensional schematic diagram of the connection structure of the drive motor, active bevel gear, driven bevel gear, transmission ring and rotating shaft of the A / O and MBR membrane bioreactor for piggery wastewater treatment provided by the embodiment of the present invention;

[0035] Figure 6 A three-dimensional schematic diagram of the first electric push rod, the moving plate and the rotating shaft connection structure of the A / O and MBR membrane bioreactor for piggery wastewater treatment provided by an embodiment of the present invention;

[0036] Figure 7 A three-dimensional schematic diagram of the connection structure of the second electric push rod, the moving frame, the first exhaust hood, the transmission ring and the second exhaust hood of the A / O and MBR membrane bioreactor for piggery wastewater treatment provided by the embodiment of the present invention;

[0037] Figure 8 A three-dimensional schematic diagram of the cross-sectional structure of the power box of the A / O and MBR membrane bioreactor for piggery wastewater treatment provided by the embodiment of the present invention;

[0038] Fig. 9 A three-dimensional schematic diagram of the cross-sectional structure of the filter box of the A / O and MBR membrane bioreactor for piggery wastewater treatment provided by the embodiment of the present invention;

[0039] Fig.10 A three-dimensional schematic diagram of the connection structure of the booster pump, flow pipe and filter box of the A / O and MBR membrane bioreactor for piggery wastewater treatment provided by the embodiment of the present invention;

[0040] Fig.11 A three-dimensional schematic diagram of the cover plate, multiple biofilm filter plates and support plate connection structure of the A / O and MBR membrane bioreactor for piggery wastewater treatment provided by the embodiment of the present invention;

[0041] Fig.12 A three-dimensional schematic diagram of a separation structure of multiple biomembrane filter plates and multiple limiting frames of an A / O and MBR membrane bioreactor for pig wastewater treatment provided in an embodiment of the present invention.

[0042] Reference numerals:

[0043] 1. Base; 2. Vertical plate; 3. De-dusting box; 4. De-dusting plate; 401. De-dusting hole; 5. Hanging plate; 6. Limiting strip; 7. Positioning strip; 8. Delivery pump; 9. Drain pipe; 10. Delivery pipe; 1001. One-way valve; 11. Reaction box; 12. Partition plate; 13. Mounting frame; 14. Moving plate; 15. First electric push rod; 16. Rotating shaft; 17. Dispersion disc; 18. Sealing ring; 19. Sealing disc; 20. Transmission ring; 21. Card plate; 22. Driving motor; 23. Active bevel gear; 24. Driven bevel gear; 25. Ventilation hole; 26. First support pipe; 27. Exhaust hood; 28. Second support pipe; 29. ​​First air hood; 30. First air hole; 31. Mounting ring; 32. Second air hood; 33. Second air hole ; 34. Power box; 35. Air pipe; 36. Support frame; 37. Moving frame; 38. Second electric push rod; 39. Mounting plate; 40. Transmission shaft; 41. Connecting bevel gear; 42. Blade shaft; 43. Inhalation blade; 44. Driving bevel gear; 45. Flow pipe; 46. Active shaft; 47. Active gear; 48. Driven gear; 49. Synchronous wheel; 50. Synchronous belt; 51. Drain pipe; 52. Booster pump; 53. Filter box; 54. External pipe; 55. Cover plate; 56. Grid plate; 57. Mounting rod; 58. Support plate; 59. Limiting frame; 60. Biofilm filter plate; 61. Fixed shaft; 62. Hook; 63. Clamping rod; 64. Limiting cover; 65. Insert plate; 66. Locking plate; 67. Handle; 68. Compression spring. DETAILED DESCRIPTION

[0044] The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0045] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "connection" can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed" means that they are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0046] Example 1: Reference Figure 1-Figure 12 , an A / O and MBR membrane bioreactor for treating pig wastewater in this embodiment comprises a base 1, on one side of the top of the base 1 are symmetrically fixedly mounted two vertical plates 2, and a de-dusting box 3 is fixedly mounted on the top of the two vertical plates 2. A de-dusting plate 4 is arranged in the de-dusting box 3, and a plurality of de-dusting holes 401 are evenly spaced on the de-dusting plate 4, which are used to filter out large particles of impurities in the wastewater. The top of the de-dusting plate 4 extends to the top of the de-dusting box 3, and a hanging plate 5 is fixedly mounted thereon, and the hanging plate 5 is clamped on the top of the de-dusting box 3 to facilitate the installation and removal of the de-dusting plate 4. In addition, a positioning bar 7 is fixedly mounted on one side of the bottom of the de-dusting plate 4, and a limiting bar 6 is fixedly mounted on the inner wall of one side of the de-dusting box 3, and the positioning bar 7 is clamped with the limiting bar 6 to ensure the stable position of the de-dusting plate 4 in the de-dusting box 3.

[0047] Next, the reaction mechanism is installed on the top of the base 1. The reaction mechanism includes a delivery pump 8 and a reaction box 11 fixedly installed on the top of the base 1, and the delivery pump 8 is located between the impurity removal box 3 and the reaction box 11. A downpipe 9 is fixedly installed on the suction end of the delivery pump 8, and the top end of the downpipe 9 extends into the impurity removal box 3 and is fixedly connected to the bottom inner wall of the impurity removal box 3. A delivery pipe 10 is fixedly installed on the output end of the delivery pump 8, and the top end of the delivery pipe 10 extends into the reaction box 11 and is fixedly connected to the top inner wall of one side of the reaction box 11, and a one-way valve 1001 is fixedly installed in the delivery pipe 10 to prevent wastewater from flowing back.

[0048] A partition 12 is fixedly installed in the reaction box 11, dividing the reaction box 11 into two upper and lower areas. A plurality of vent holes 25 are evenly spaced on the inner wall of the reaction box 11, all located below the partition 12, for ventilating the area below the partition 12 when needed. A flow hole is opened on the partition 12, and a sealing ring 18 connected to the flow hole is fixedly installed at the bottom thereof. A dispersion component is installed on the top of the reaction box 11, and the bottom of the dispersion component extends into the reaction box 11, and passes through the flow hole and the sealing ring 18 respectively and fits with the inner wall of the sealing ring 18. The dispersion component includes a transmission ring 20 rotatably connected to the top of the reaction box 11, and a rotating shaft 16 is penetrated in the transmission ring 20, and the bottom end of the rotating shaft 16 passes through the flow hole and the sealing ring 18. A clamping plate 21 is fixedly installed on the top of both sides of the rotating shaft 16, and is movably clamped in two clamping grooves symmetrically opened on the top of the transmission ring 20. A driven bevel gear 24 is fixedly sleeved on the transmission ring 20, and a driving motor 22 is fixedly installed on one side of the top of the reaction box 11, and a driving bevel gear 23 is fixedly installed on its output shaft, which meshes with the driven bevel gear 24. A sealing disc 19 and two dispersion discs 17 are fixedly sleeved on the rotating shaft 16. The sealing disc 19 passes through the flow hole and the sealing ring 18 respectively and fits them tightly respectively. The two dispersion discs 17 are respectively located above and below the partition 12.

[0049] The deoxygenation mechanism is installed in the reaction box 11, and is used to discharge oxygen when the wastewater undergoes an anaerobic reaction. The filtering mechanism is installed on the top of the base 1 and is connected to the deoxygenation mechanism, and is used to perform biofilm filtration on the wastewater after aerobic and anaerobic reactions. One side of the filtering mechanism extends into the reaction box 11 and is connected to the bottom inner wall of the other side of the reaction box 11.

[0050] When in use, the wastewater used for pig farming is put into the impurity removal box 3, and the large granular solid particles contained in the wastewater are filtered by the impurity removal plate 4. Then the delivery pump 8 is started to extract the wastewater in the impurity removal box 3, and the wastewater is transported to the reaction box 11 through the delivery pipe 10. At this time, the flow hole is blocked by the sealing disk 19, and the wastewater falls on the top of the partition 12. Then the deoxygenation mechanism is started to remove the oxygen above the partition 12, so that the wastewater is reacted and purified in an anaerobic environment, killing aerobic bacteria in the wastewater. At the same time, the drive motor 22 is started to drive the active bevel gear 23 to rotate, and the transmission ring 20 is driven to rotate through the meshing transmission with the driven bevel gear 24. The transmission ring 20 drives the rotating shaft 16 to rotate through two clamping plates 21, and then drives the dispersion disk 17 to rotate. When the dispersion disk 17 rotates, the wastewater is centrifugally dispersed, which helps to quickly release and discharge the oxygen in the wastewater so that the wastewater can enter the other side of the top of the reaction box 11. We fixedly installed a mounting frame 13. In this mounting frame 13, we designed a sliding moving plate 14, one side of which extends to the outside of the mounting frame 13. The top of the rotating shaft 16 is rotatably connected to the bottom of the moving plate 14. In order to ensure that the moving plate 14 can move longitudinally stably and accurately, we installed a first electric push rod 15 on the top of the mounting frame 13, whose output shaft extends into the mounting frame 13 and is fixedly connected to the top of the moving plate 14.

[0051] When the wastewater undergoes an anaerobic reaction in the reaction box 11, the first electric push rod 15 will keep the moving plate 14 and its connected rotating shaft 16, sealing disk 19 and other components in the initial position. At this time, the flow hole and the sealing ring 18 are tightly sealed by the sealing disk 19, and the wastewater is confined above the partition 12 for an anaerobic reaction. Once the anaerobic reaction is completed, we can start the first electric push rod 15, which will drive the moving plate 14 and its connected components to move upward as a whole. In this process, the sealing disk 19 will also move upward, thereby opening the flow hole and the sealing ring 18, so that the wastewater can smoothly pass through these openings and flow to the bottom of the partition 12.

[0052] Then, we can start the first electric push rod 15 again to drive the moving plate 14 and its connected parts to move downward until the two clamping plates 21 are tightly engaged with the corresponding clamping slots. At this time, if we start the driving motor 22, it will drive the dispersion plate 17 to rotate through the transmission assembly, thereby effectively dispersing the wastewater falling under the partition 12. This dispersion effect can make the wastewater fully contact with oxygen, so as to carry out further biological reactions in an aerobic environment and kill anaerobic microorganisms.

[0053] In addition to the above-mentioned reaction mechanism, we have also designed a deoxygenation mechanism to ensure that the wastewater reacts in an oxygen-free environment. This deoxygenation mechanism is mainly composed of a first support tube 26, a second support tube 28, an exhaust hood 27, a first gas supply hood 29, a second gas supply hood 32, and a mounting ring 31. Among them, the first support tube 26 and the second support tube 28 are respectively fixedly mounted on the top inner walls of both sides of the reaction box 11, and extend to the outside of both sides of the reaction box 11. An exhaust hood 27 is also fixedly mounted at one end of the second support tube 28 for discharging the squeezed oxygen in the reaction box 11.

[0054] The first gas delivery hood 29 and the second gas delivery hood 32 are slidably connected in the first support tube 26 and the second support tube 28, respectively. Gas delivery holes are provided on the top inner wall and the bottom inner wall of the first gas delivery hood 29 and the second gas delivery hood 32 for inputting nitrogen and discharging oxygen. The two gas delivery hoods are connected together by the mounting ring 31 to form an integral structure.

[0055] In order to ensure that the deoxygenation mechanism can work properly, we also designed a position adjustment component and a gas delivery component. The position adjustment component is mainly composed of a support frame 36, a mobile frame 37, a second electric push rod 38 and a mounting plate 39. Among them, the support frame 36 is fixedly installed on the top of the reaction box 11, and the mobile frame 37 is slidably connected thereon. The mounting plate 39 is fixedly sleeved on the first gas delivery hood 29 and is connected to the support frame 36 through the mobile frame 37. The output shaft of the second electric push rod 38 passes through the support frame 36 and is fixedly connected to one side of the mobile frame 37, which is used to drive the mobile frame 37 and its connected components to move horizontally.

[0056] The gas delivery assembly passes through the mobile frame 37 and is connected to the mobile frame 37. It can be connected to an external nitrogen gas delivery pipeline. When we need to inject nitrogen into the reaction box 11, we can start the second electric push rod 38 in the positioning assembly to drive the mobile frame 37 and its connected parts to move horizontally, so that the first gas delivery hood 29 and the second gas delivery hood 32 move to the appropriate position. At this time, the two first gas delivery holes 30 will be connected to the reaction box 11, and the two second gas delivery holes 33 will be connected to the exhaust hood 27. Then we can deliver nitrogen to the reaction box 11 through the gas delivery assembly.

[0057] As the nitrogen gradually increases, and because the molecular mass of nitrogen is larger than that of oxygen, the oxygen in the reaction box 11 will be gradually squeezed out and discharged into the exhaust hood 27 through the second gas supply hood 32 and the two second gas supply holes 33. In this way, we can ensure that the wastewater reacts in an oxygen-free environment. After the nitrogen is injected, we only need to start the second electric push rod 38 again to drive the moving frame 37 to move in the opposite direction to make the first gas supply hood 29 and the second gas supply hood 32 move in the opposite direction back to the initial position and use the first support tube 26 and the second support tube 28 to block them to ensure the closed nature of the reaction box 11 for an oxygen-free reaction.

[0058] Example 2: Reference Figure 1 , Figure 9-12 This embodiment is based on the first embodiment. Regarding the A / O and MBR membrane bioreactor for pig wastewater treatment proposed in the first embodiment, when constructing the A / O and MBR membrane bioreactor for pig wastewater treatment, we specially designed a gas delivery component to ensure that nitrogen can be smoothly delivered to the reaction box. Specifically, we fixedly installed a power box 34 on the opening side of the first gas delivery hood 29. The power box 34 is connected to the first gas delivery hood 29 and is used to provide power for nitrogen delivery. On the inner wall of one side of the power box 34, we fixedly installed an air connection pipe 35, one end of which extends to the outside of the power box 34 for connecting to an external nitrogen gas delivery pipeline.

[0059] In the power box 34, we rotatably connect a blade shaft 42, and a suction blade 43 is fixedly installed at one end of the blade shaft 42, which is used to form suction during rotation to suck nitrogen into the power box 34. A driving bevel gear 44 is fixedly installed at the other end of the blade shaft 42 for meshing transmission with the transmission component.

[0060] In order to realize transmission, a transmission shaft 40 is rotatably connected to the mobile frame 37, the bottom end of which extends into the power box 34 and is fixed with a connecting bevel gear 41, which meshes with the driving bevel gear 44. In this way, when the transmission shaft 40 rotates, the blade shaft 42 can be driven to rotate through the meshing transmission of the connecting bevel gear 41 and the driving bevel gear 44.

[0061] At the same time, a driving shaft 46 is rotatably connected to the moving frame 37, and a driven gear 48 is fixedly installed on the top of the driving shaft 46. A driving gear 47 is fixedly sleeved on the transmission ring 20, and the driving gear 47 is meshed with the driven gear 48. In this way, when the transmission ring 20 rotates, the driving shaft 46 can be driven to rotate.

[0062] For synchronous transmission, a synchronous wheel 49 is fixedly mounted on both the driving shaft 46 and the transmission shaft 40, and a synchronous belt 50 is transmission-mounted on the two synchronous wheels 49. In this way, when the driving shaft 46 rotates, the transmission shaft 40 can be driven to rotate through the coordinated transmission of the two synchronous wheels 49 and the synchronous belt 50.

[0063] After connecting the air connection pipe 35 to the external nitrogen gas delivery pipeline, we can start the nitrogen gas delivery pipeline to deliver nitrogen to the power box 34. At this time, the suction force formed by the suction blade 43 during the rotation process will suck the nitrogen into the first gas delivery hood 29, and deliver the nitrogen to the reaction box 11 through the two first gas delivery holes 30, thereby ensuring that the wastewater reacts in an oxygen-free environment.

[0064] After treating the wastewater, we need to filter and purify the wastewater. To this end, we fixedly install a sewage pipe 51 on the inner wall of the bottom of one side of the reaction box 11, and one end of the sewage pipe 51 extends to the outside of the reaction box 11 and is connected to the suction end of the booster pump 52. A flow pipe 45 is fixedly installed on the output end of the booster pump 52 to transport the wastewater to the filter box 53.

[0065] A cover plate 55 is mounted on the top of the filter box 53 to close the filter box 53. The top end of the flow tube 45 extends into the filter box 53 and is fixedly connected to the top inner wall of one side of the filter box 53. A mesh plate 56 is fixedly installed in the filter box 53 to perform preliminary filtering on the wastewater.

[0066] At the same time, two mounting rods 57 are symmetrically fixedly installed on one side of the bottom of the cover plate 55, and the bottom ends of the two mounting rods 57 extend into the filter box 53, and a support plate 58 is fixedly installed. The support plate 58 contacts the inner wall corresponding to the filter box 53 and one side of the mesh plate 56, and is used to support the mesh plate 56.

[0067] On the inner wall of the bottom of the other side of the filter box 53, we fixedly installed an external pipe 54 for discharging the filtered wastewater. On the bottom of the cover plate 55, we fixedly installed multiple biofilm filter plates 60 at equal intervals, which can further filter and purify the wastewater. At the same time, multiple limit racks 59 are also fixedly installed at equal intervals in the filter box 53, and the biofilm filter plates 60 are engaged with the corresponding limit racks 59 to ensure the stable installation of the biofilm filter plates 60.

[0068] When the cover plate 55 is mounted on the filter box 53, we can rotate the fixed shaft 61 to drive the two hooks 62 to rotate, so that the hooks 62 are mounted with the corresponding clamping rods 63, thereby clamping and limiting the cover plate 55. In order to ensure the stable clamping of the hooks 62 and the clamping rods 63, we fixedly installed a limit cover 64 on the fixed shaft 61, and slidably connected a plug plate 65 in the limit cover 64. On the top of the cover plate 55, we fixedly installed a locking plate 66, which has a plug hole, and one side of the plug plate 65 can pass through the plug hole and be clamped with the plug hole.

[0069] At the same time, we have opened an adjustment hole on the top inner wall of the limit cover 64, and a handle 67 is fixedly installed on the top of the plug plate 65. The top of the handle 67 can pass through the adjustment hole and extend to the top of the limit cover 64. A compression spring 68 is fixedly installed on the other side of the plug plate 65, and one end of the compression spring 68 is fixedly connected to the inner wall of one side of the limit cover 64. After the two hooks 62 are clamped with the corresponding clamping rod 63, we can release the handle 67. At this time, the compression spring 68 in a stressed state will push the plug plate 65 to move, so that the plug plate 65 passes through the insertion hole and is clamped with the locking plate 66, thereby realizing the limitation of the two hooks 62 and ensuring that the two hooks 62 and the corresponding clamping rod 63 can be stably clamped together.

[0070] Working principle: the wastewater to be treated is put into the impurity removal box 3, and the large solid particles contained in the wastewater are filtered by the impurity removal plate 4, and then the delivery pump 8 is started to extract the wastewater in the impurity removal box 3, and the wastewater is delivered to the reaction box 11 through the delivery pipe 10, and then the air connection pipe 35 can be connected to the external nitrogen gas pipeline, and then the second electric push rod 38 is started to drive the moving frame 37 to move horizontally, and then the mounting plate 39 can be driven to move, so as to drive the first gas hood 29 to move, and at this time, driven by the mounting ring 31, the second gas hood 32 can be driven to move, so that the two first gas holes 30 are connected to the reaction box 11, and the two second gas holes 33 are connected to the exhaust hood 27, and when moving When the frame 37 moves, the driven gear 48 can be driven to move, so that the driven gear 48 is meshed with the driving gear 47, and then the driving motor 22 can be started to drive the active bevel gear 23 to rotate. At this time, under the meshing transmission action with the driven bevel gear 24, the transmission ring 20 can be driven to rotate, so that the rotating shaft 16 can be driven to rotate through the card connection with the two card plates 21, and the dispersion disk 17 can be driven to rotate. When the dispersion disk 17 rotates, the wastewater can be centrifugally dispersed. At this time, when the oxygen is discharged, the oxygen in the wastewater can be quickly released and discharged by dispersing the wastewater, and when the transmission ring 20 rotates, the active gear 47 can be driven to rotate. At this time, under the meshing transmission action with the driven gear 48 , can drive the driving shaft 46 to rotate, at this time, under the cooperative transmission action of the two synchronous wheels 49 and the synchronous belt 50, the transmission shaft 40 can be driven to rotate, at this time, through the meshing transmission action of the connecting bevel gear 41 and the driving bevel gear 44, the blade shaft 42 can be driven to rotate, and the suction blade 43 can be driven to rotate. When the suction blade 43 rotates, suction can be formed. Therefore, after the air connection pipe 35 is connected to the external nitrogen gas supply pipeline, nitrogen can be transported to the first gas supply hood 29, and then the nitrogen can be transported to the reaction box 11 through the two first gas supply holes 30. As the nitrogen gradually increases, and the molecular mass of nitrogen is larger than that of oxygen, the oxygen in the reaction box 11 can be squeezed out, so that the oxygen The gas is discharged through the second gas delivery hood 32 and the two second gas delivery holes 33, so that the wastewater can react in an anaerobic environment. After the oxygen located above the partition 12 is exhausted, the second electric push rod 38 can be reversely started to drive the first gas delivery hood 29 and the second gas delivery hood 32 to move in the opposite direction, and the first support tube 26 is used to block the two first gas delivery holes 30, and the second support tube 28 is used to block the two second gas delivery holes 33, so that the reaction box 11 can be closed, so that the wastewater is in an anaerobic environment for reaction. After the anaerobic reaction is completed, the first electric push rod 15 can be started to drive the moving plate 14 to move longitudinally, and the rotating shaft 16 can be driven to move longitudinally. After the anaerobic reaction of the wastewater is completed, when the rotating shaft 16 moves upward,The sealing plate 19 can be driven to move upward, and the flow hole and the sealing ring 18 are opened at this time, and the wastewater can flow to the bottom of the partition 12 through the flow hole and the sealing ring 18. Since there is sufficient oxygen under the partition 12, after the wastewater flows to the bottom of the partition 12, the anaerobic bacteria in the wastewater can be killed. After the aerobic reaction is completed, the booster pump 52 is started to extract the wastewater from the reaction box 11, and then it can be transported to the filter box 53. At this time, the grid plate 56 is used to filter the wastewater in advance, and then the wastewater keeps flowing, and multiple biofilm filters can be used. The plate 60 filters the wastewater, so that the pig farm wastewater can be purified and filtered. After the wastewater is filtered, the handle 67 can be pulled to pull the plug plate 65 out of the socket, and then the limit cover 64 can be rotated in the opposite direction to separate the two hooks 62 from the corresponding clamping rods 63. After that, the cover plate 55 can be pulled upward to remove the multiple biofilm filter plates 60 and the support plate 58. When the support plate 58 moves upward, it can scrape the inner wall of the filter box 53 and the mesh plate 56, and can scrape out the impurities filtered by the mesh plate 56, so that the impurities can be easily cleaned.

[0071] However, as is well known to those skilled in the art, the working principles and wiring methods of the delivery pump 8, the first electric push rod 15, the drive motor 22, the second electric push rod 38 and the boost pump 52 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art may make any optional selections according to their needs or convenience.

[0072] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention; the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An A / O and MBR membrane bioreactor for treating pig wastewater, comprising a base (1), two vertical plates (2) are symmetrically fixedly installed on one side of the top of the base (1), and the top of the two vertical plates (2) is fixedly installed with the same impurity removal box (3), an impurity removal plate (4) is arranged in the impurity removal box (3), and a plurality of impurity removal holes (401) are opened at equal intervals on the impurity removal plate (4), the top of the impurity removal plate (4) extends to the top of the impurity removal box (3) and is fixedly installed with a hanging plate (5), the hanging plate (5) is clamped on the top of the impurity removal box (3), a positioning strip (7) is fixedly installed on one side of the bottom of the impurity removal plate (4), a limiting strip (6) is fixedly installed on one side of the inner wall of the impurity removal box (3), and the positioning strip (7) and the limiting strip (6) are clamped together, characterized in that The reactor also includes: A reaction mechanism, the reaction mechanism is installed on the top of the base (1), one side of the reaction mechanism extends into the impurity removal box (3) and is connected to the bottom inner wall of the impurity removal box (3), and the reaction mechanism is used to perform anoxic reaction and aerobic reaction on the wastewater; A deoxygenation mechanism is installed on the reaction mechanism and is used to discharge oxygen when the wastewater undergoes an anaerobic reaction; A filtering mechanism is installed on the top of the base (1), the filtering mechanism is connected to the deoxygenation mechanism, and the filtering mechanism is used to perform biofilm filtration on wastewater after aerobic reaction and anaerobic reaction.

2. The A / O and MBR membrane bioreactor for piggery wastewater treatment according to claim 1, characterized in that: The reaction mechanism comprises a delivery pump (8) and a reaction box (11) respectively fixedly mounted on the top of the base (1); the delivery pump (8) is located between the impurity removal box (3) and the reaction box (11); a downpipe (9) is fixedly mounted on the suction end of the delivery pump (8); the top end of the downpipe (9) extends into the impurity removal box (3) and is fixedly connected to the bottom inner wall of the impurity removal box (3); a delivery pipe (10) is fixedly mounted on the output end of the delivery pump (8); the top end of the delivery pipe (10) extends into the reaction box (11) and is fixedly connected to the top inner wall of one side of the reaction box (11); a one-way valve (1001) is fixedly mounted in the delivery pipe (10); and a partition (1001) is fixedly mounted in the reaction box (11). 2), a plurality of vent holes (25) are provided at equal intervals on the inner wall of the reaction box (11) and are all located below the partition (12); a flow hole is provided on the partition (12); a sealing ring (18) connected to the flow hole is fixedly installed at the bottom of the partition (12); a dispersion component is installed on the top of the reaction box (11); the bottom of the dispersion component extends into the reaction box (11); the dispersion component passes through the flow hole and the sealing ring (18) respectively and fits with the inner wall of the sealing ring (18); the dispersion component is used for centrifugally dispersing wastewater; a deoxygenation mechanism is installed on the reaction box (11); one side of the filtering mechanism extends into the reaction box (11) and is connected to the inner wall of the bottom of the other side of the reaction box (11).

3. The A / O and MBR membrane bioreactor for piggery wastewater treatment according to claim 2, characterized in that: The dispersion assembly comprises a transmission ring (20) rotatably connected to the top of the reaction box (11), two slots are symmetrically provided on the top of the transmission ring (20), a rotating shaft (16) is provided inside the transmission ring (20), the bottom end of the rotating shaft (16) passes through the flow hole and the sealing ring (18) and extends to the bottom of the sealing ring (18), a clamping plate (21) is fixedly installed on the top of both sides of the rotating shaft (16), the clamping plate (21) is movably clamped with the corresponding slot, a driven bevel gear (24) is fixedly sleeved on the transmission ring (20), and the reaction box (11) is provided with a plurality of rotating shafts (16). A driving motor (22) is fixedly mounted on one side of the top, an active bevel gear (23) is fixedly mounted on the output shaft of the driving motor (22), the active bevel gear (23) meshes with a driven bevel gear (24), a sealing disk (19) is fixedly sleeved on the rotating shaft (16), the sealing disk (19) respectively penetrates the flow hole and the sealing ring (18) and is respectively tightly fitted with the flow hole and the sealing ring (18), and two dispersion disks (17) are fixedly sleeved on the rotating shaft (16), and the two dispersion disks (17) are respectively located above and below the partition (12).

4. The A / O and MBR membrane bioreactor for piggery wastewater treatment according to claim 3, characterized in that: A mounting frame (13) is fixedly mounted on the other side of the top of the reaction box (11), a movable plate (14) is slidably connected inside the mounting frame (13), one side of the movable plate (14) extends to the outside of the mounting frame (13), the top of the rotating shaft (16) is rotatably connected to the bottom of the movable plate (14), and a first electric push rod (15) is fixedly mounted on the top of the mounting frame (13), the output shaft of the first electric push rod (15) extends into the mounting frame (13) and is fixedly connected to the top of the movable plate (14).

5. The A / O and MBR membrane bioreactor for piggery wastewater treatment according to claim 3, characterized in that: The deoxygenation mechanism comprises a first support tube (26) and a second support tube (28) respectively fixedly mounted on the top inner walls of both sides of the reaction box (11); the ends of the first support tube (26) and the second support tube (28) which are away from each other respectively extend to the outside of both sides of the reaction box (11); an exhaust hood (27) is fixedly mounted on one end of the second support tube (28); a first gas delivery hood (29) is slidably connected to the first support tube (26); first gas delivery holes (30) are provided on the top inner wall and the bottom inner wall of the first gas delivery hood (29); and the second support tube (26) is provided with a first gas delivery hole (30). A second gas delivery hood (32) is slidably connected to the inside of the reaction box (11), and a second gas delivery hole (33) is provided on the top inner wall and the bottom inner wall of the second gas delivery hood (32). A mounting ring (31) located in the reaction box (11) is fixedly mounted on the side where the first gas delivery hood (29) and the second gas delivery hood (32) are close to each other. A positioning assembly is mounted on the top of the reaction box (11), and the positioning assembly is connected to the first gas delivery hood (29). A gas delivery assembly is connected to the positioning assembly, and the gas delivery assembly is respectively connected to the first gas delivery hood (29) and the transmission ring (20).

6. The A / O and MBR membrane bioreactor for piggery wastewater treatment according to claim 5, characterized in that: The positioning assembly comprises a support frame (36) fixedly mounted on the top of the reaction box (11), a movable frame (37) being slidably connected to the support frame (36), a movable hole being opened on the support frame (36), a mounting plate (39) being fixedly mounted on the bottom of the movable frame (37), the bottom of the mounting plate (39) passing through the movable hole and extending to the bottom of the support frame (36), the mounting plate (39) being fixedly sleeved on the first gas transmission cover (29), a second electric push rod (38) being fixedly mounted on one side of the support frame (36), an output shaft of the second electric push rod (38) passing through the support frame (36) and being fixedly connected to one side of the movable frame (37), and the gas transmission assembly passing through the movable frame (37) and being connected to the movable frame (37).

7. The A / O and MBR membrane bioreactor for piggery wastewater treatment according to claim 6, characterized in that: The gas delivery assembly comprises a power box (34) fixedly mounted on one side of the opening of the first gas delivery hood (29), the power box (34) being connected to the first gas delivery hood (29), an air connection pipe (35) fixedly mounted on one side inner wall of the power box (34), one end of the air connection pipe (35) extending to the outside of the power box (34), a blade shaft (42) rotatably connected in the power box (34), one end of the blade shaft (42) being fixedly mounted with an air suction blade (43), the other end of the blade shaft (42) being fixedly mounted with a driving bevel gear (44), a transmission shaft (40) passing through the movable frame (37) and rotatably connected thereto, and a transmission shaft (40) passing through the movable frame (37) and rotatably connected thereto. The bottom end of the shaft (40) extends into the power box (34) and is fixedly provided with a connecting bevel gear (41), the connecting bevel gear (41) is meshed with the driving bevel gear (44), a driving shaft (46) is rotatably connected to the mobile frame (37), a driven gear (48) is fixedly provided at the top of the driving shaft (46), a driving gear (47) is fixedly provided on the transmission ring (20), the driving gear (47) is meshed with the driven gear (48), a synchronous wheel (49) is fixedly provided on both the driving shaft (46) and the transmission shaft (40), and the transmission sleeves on the two synchronous wheels (49) are provided with the same synchronous belt (50).

8. The A / O and MBR membrane bioreactor for piggery wastewater treatment according to claim 1, characterized in that: The filtering mechanism comprises a sewage discharge pipe (51) fixedly mounted on the inner wall of the bottom of one side of the reaction box (11), one end of the sewage discharge pipe (51) extending to the outside of the reaction box (11), a booster pump (52) fixedly mounted on the top of the base (1), one end of the sewage discharge pipe (51) connected to the suction end of the booster pump (52), a flow pipe (45) fixedly mounted on the output end of the booster pump (52), a filter box (53) fixedly mounted on the top of the base (1), a cover plate (55) clamped on the top of the filter box (53), the top end of the flow pipe (45) extending into the filter box (53) and fixedly connected to the inner wall of the top of one side of the filter box (53), and the filter box (53) is provided with a cover plate (55). A mesh plate (56) is fixedly installed, and two mounting rods (57) are symmetrically fixedly installed on one side of the bottom of the cover plate (55). The bottom ends of the two mounting rods (57) extend into the filter box (53) and are fixedly installed with a same support plate (58). The support plate (58) is in contact with the corresponding inner wall of the filter box (53) and one side of the mesh plate (56). An external pipe (54) is fixedly installed on the inner wall of the bottom of the other side of the filter box (53). A plurality of biofilm filter plates (60) are fixedly installed at equal intervals on the bottom of the cover plate (55). A plurality of limit frames (59) are fixedly installed at equal intervals in the filter box (53), and the biofilm filter plates (60) are engaged with the corresponding limit frames (59).

9. The A / O and MBR membrane bioreactor for piggery wastewater treatment according to claim 8, characterized in that: The top of the cover plate (55) is rotatably connected to a fixed shaft (61), and two hooks (62) are fixedly sleeved on the fixed shaft (61). Clamping rods (63) are fixedly installed on the tops of both sides of the filter box (53), and the hooks (62) are clamped with corresponding clamping rods (63).

10. The A / O and MBR membrane bioreactor for piggery wastewater treatment according to claim 9, characterized in that: A limit cover (64) is fixedly mounted on the fixed shaft (61), a plug plate (65) is slidably connected inside the limit cover (64), a locking plate (66) is fixedly mounted on the top of the cover plate (55), a plug hole is provided on the locking plate (66), one side of the plug plate (65) passes through the plug hole and is clamped with the plug hole, an adjustment hole is provided on the top inner wall of the limit cover (64), a handle (67) is fixedly mounted on the top of the plug plate (65), the top of the handle (67) passes through the adjustment hole and extends to the top of the limit cover (64), a compression spring (68) is fixedly mounted on the other side of the plug plate (65), one end of the compression spring (68) is fixedly connected to the inner wall of one side of the limit cover (64).

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