A purification membrane system for high-altitude aquaculture wastewater treatment

Abstract

This application provides a purification membrane system for high-altitude aquaculture wastewater treatment, comprising an anaerobic digester, a collection tank, a filter cartridge, and a treatment tank. The anaerobic digester has an open top and a transparent protective cover. The collection tank has a pipe connected to the bottom of the anaerobic digester's inner cavity on its side, and a pump unit connected to its inner cavity is installed on the side of the collection tank. This purification membrane system for high-altitude aquaculture wastewater treatment reduces the content of solid waste, feed residue, and animal hair in the wastewater through multiple filtrations, thereby extending the single-use cycle of the membrane reactor, reducing the frequency of cleaning or replacement, and improving wastewater treatment efficiency. In addition, the temperature in this purification membrane system is controllable, which facilitates the survival and reproduction of anaerobic and aerobic microorganisms, and facilitates the treatment of organic matter, nitrogen, phosphorus, and other nutrients in the wastewater, thus improving the quality of aquaculture wastewater treatment.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a purification membrane system for treating aquaculture wastewater at high altitudes. Background Technology

[0002] The rapid development of intensive and large-scale livestock and poultry farming has driven economic growth, but it has also brought increasingly serious environmental pollution problems. During the farming process, livestock and poultry excrement, feed residue, and flushing water generate large amounts of wastewater. This wastewater contains high levels of organic matter, nitrogen, phosphorus, and other nutrients. If discharged directly without treatment, it will lead to eutrophication of water bodies, causing water quality deterioration. This not only affects the safety of water for humans and other organisms but also disrupts the ecological balance. Furthermore, heavy metals and harmful substances in livestock and poultry wastewater can seep into the soil, affecting crop growth. Moreover, livestock and poultry wastewater may carry large numbers of pathogenic microorganisms, such as bacteria and viruses, posing a threat to public health and safety.

[0003] High-altitude regions have unique climates, characterized by low temperatures and large diurnal temperature variations, making it difficult for microorganisms to survive and reproduce. Currently, membrane reactors are commonly used to purify livestock wastewater in high-altitude areas. However, the presence of livestock excrement and feed residue in the wastewater can easily affect the use of membrane reactors, requiring frequent cleaning or replacement, thus making the treatment of livestock wastewater quite challenging. Summary of the Invention

[0004] The technical problem to be solved by this invention is to overcome the existing defects and provide a purification membrane system for high-altitude aquaculture wastewater treatment. By filtering the aquaculture wastewater multiple times, the content of solid excrement, feed residue, animal hair, etc. in the wastewater is reduced, thereby extending the single-use cycle of the membrane reactor, reducing the frequency of cleaning or replacement, and improving wastewater treatment efficiency. In addition, the temperature in this purification membrane system is controllable, which facilitates the survival and reproduction of anaerobic and aerobic microorganisms, and facilitates the treatment of organic matter, nitrogen, phosphorus and other nutrients in the wastewater, thereby improving the quality of aquaculture wastewater treatment and effectively solving the problems in the background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a purification membrane system for high-altitude aquaculture wastewater treatment, comprising an anaerobic fermenter, a collection box, a filter cartridge, and a treatment box. The anaerobic fermenter has an open top and a transparent protective cover. The collection box has a pipe connected to the bottom of the anaerobic fermenter's inner cavity on its side, and a pump unit connected to its inner cavity is installed on the side of the collection box. A downflow pipe connected to the inner cavity of the filter cartridge is installed on the lower side of the collection box. The filter cartridge is inclined and has an open top. A solid conveying component is installed inside the filter cartridge. A squeezing component is installed at the open end of the filter cartridge. A filtration component is installed on the lower side of the filter cartridge, and a connecting pipe connected to the inner cavity of the treatment box is installed on the side of the filtration component. The treatment box contains an aeration component and several sets of membrane reactors, and a cleaning component is installed on the inner side of the treatment box near the membrane reactors.

[0006] As a preferred embodiment of the present invention, a sludge injection pipe communicating with the inner cavity of the anaerobic fermenter is installed on the side of the anaerobic fermenter. The protective cover includes a positioning frame, and several transparent plates are installed inside the positioning frame. An annular chute is provided on the upper part of the inner side of the anaerobic fermenter. A water supply pipe communicating with the bottom of the inner cavity of the chute is installed on the side of the anaerobic fermenter. The other end of the water supply pipe is fixed to the side of the collection box and communicates with the inner cavity of the collection box.

[0007] As a preferred embodiment of the present invention, a plurality of protective frames are provided on the inner edge of the anaerobic fermenter, and an installation port is provided on the side of the protective frame, and a protective net is installed in the installation port. A guide pipe communicating with the bottom of the inner cavity is provided between two adjacent protective frames, and the pipe is located in one of the protective frames.

[0008] As a preferred embodiment of the present invention, the pipeline includes an extraction pipe, and the portion of the extraction pipe located inside the anaerobic digester is vertically arranged. A movable pipe is slidably arranged inside the extraction pipe. A positioning rod is fixed inside the extraction pipe. A cone located inside the movable pipe is fixed at the bottom of the positioning rod. A retaining ring is fixed inside the anaerobic digester and is sleeved on the outside of the movable pipe. A protrusion is provided in the middle of the side of the movable pipe, and the protrusion is located above the retaining ring.

[0009] As a preferred embodiment of the present invention, the filtration assembly includes a collection box installed on the side of the filter cylinder, the side of the filter cylinder having a communication port communicating with the inner cavity of the collection box, a filter screen installed in the communication port, a communication pipe installed on the side of the collection box and communicating with the inner cavity of the collection box, a one-way valve installed on the communication pipe, the solid conveying assembly including a motor unit installed outside the filter cylinder, an installation shaft located inside the filter cylinder being installed on the output shaft of the motor unit, and a spiral blade being installed on the installation shaft, and a bracket for positioning the filter cylinder being installed on the side of the processing box.

[0010] As a preferred embodiment of the present invention, a guide rod is rotatably mounted on the end of the mounting shaft, the extrusion assembly includes a positioning plate slidably disposed on the guide rod, a circular plate is fixed to the end of the guide rod, and a spring is sleeved on the outside of the guide rod, with the spring located between the positioning plate and the circular plate.

[0011] As a preferred embodiment of the present invention, a partition is fixed inside the treatment tank, and the partition divides the inner cavity of the treatment tank into a reaction chamber and a treatment chamber. The aeration assembly is located in the reaction chamber, and several sets of membrane reactors are located in the treatment chamber. An inlet pipe communicating with the inner cavity of several sets of membrane reactors is installed on the lower side of the partition, and an outlet pipe communicating with the inner cavity of several sets of membrane reactors is installed on the upper side of the treatment tank. A drain pipe is provided between two adjacent membrane reactors, and a purified water pipe communicating with the inner cavity of several drain pipes is installed on the side of the treatment tank.

[0012] As a preferred embodiment of the present invention, the aeration assembly includes an aeration pipe installed on the lower side of the treatment tank. A plurality of air nozzles communicating with the inner cavity of the aeration pipe are installed on the side of the aeration pipe, and the plurality of air nozzles are all located inside the reaction chamber. A temperature sensor is installed on the side of the aeration pipe, and the detection end of the temperature sensor is located inside the aeration pipe. A temperature control box is installed on the outside of the aeration pipe, and an electric heating element is installed on the side of the temperature control box. The heating end of the electric heating element is in contact with the side of the aeration pipe. The temperature sensor and the temperature control box are both located outside the treatment tank.

[0013] As a preferred embodiment of the present invention, the cleaning assembly includes a mounting frame slidably disposed on the top of the processing chamber, a plurality of mounting brackets fixed on the side of the mounting frame, and the mounting brackets being staggered with the membrane reactor, and a plurality of cleaning strips fixed on the side of the mounting brackets.

[0014] As a preferred embodiment of the present invention, mounting boxes are installed on both sides of the processing box, and air vents communicating with the inner cavity of the processing box are opened on the side of the mounting box. The air vents are located at the center of the side of the mounting frame. A piston is slidably installed inside the mounting box, and a push rod is fixed to the side of the piston. The push rod extends into the processing cavity through the air vent. An elastic element located inside the mounting box is provided on the side of the piston away from the air vent. A limiting plate for limiting the piston is provided inside the mounting box. An exhaust pipe communicating with the top of the reaction chamber is installed on the side of the processing box. A pressure relief valve is installed on the exhaust pipe. The end of the exhaust pipe away from the reaction chamber communicates with the inner cavity of the mounting box. A first magnetic component is installed on both sides of the processing box near the mounting frame. A second magnetic component is installed on the side of the mounting frame at the position corresponding to the first magnetic component. The first magnetic component and the second magnetic component attract each other.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The purification membrane system for treating wastewater from aquaculture at high altitudes, as exemplified by this invention, injects wastewater generated during the aquaculture process into an anaerobic digester through a wastewater injection pipe. On sunny days, sunlight enters the anaerobic digester through a transparent plate, raising the temperature inside the digester and facilitating the reproduction of anaerobic microorganisms. These microorganisms decompose the organic matter in the wastewater to form biogas, which can be used for heating or power generation in the farm. On dark or cloudy days, an insulation layer, such as straw mats or insulating cotton, is laid on the protective cover to reduce the leakage of heat from the anaerobic digester and prevent the anaerobic microorganisms from losing their activity and failing to decompose organic matter due to the low temperature at high altitudes.

[0017] 2. In the purification membrane system for high-altitude aquaculture wastewater treatment exemplified by the present invention, during the process of extracting wastewater through the pipeline, solid pollutants such as livestock and poultry excrement, feed or hay residue, etc., accumulated at the bottom of the anaerobic fermentation tank cavity enter the pipeline along with the wastewater. If the solid pollutants accumulate and block the moving pipe, causing a decrease in the pumping capacity of the moving pipe, the moving pipe moves within the extraction pipe under the influence of the suction force of the pump group on the side of the collection box. During the relative movement of the extraction pipe and the moving pipe, the positioning rod installed in the extraction pipe applies force to the pollutants accumulated in the moving pipe through the cone installed at its end, which facilitates the unblocking of the moving pipe, prevents solid pollutants from accumulating and blocking the narrower moving pipe, and ensures that the moving pipe effectively extracts wastewater.

[0018] 3. The purification membrane system for high-altitude aquaculture wastewater treatment exemplified by the present invention includes multiple protective frames for filtering wastewater from sludge. Wastewater seeps through the protective net into the protective frames, while the protective net filters and blocks larger solid pollutants, reducing the content of solid pollutants in the extracted wastewater. Wastewater within the multiple protective frames flows through guide pipes, facilitating the extraction of wastewater from the anaerobic digester via pipelines.

[0019] 4. The purification membrane system for high-altitude aquaculture wastewater treatment exemplified by the present invention connects the aeration pipe to an external pump. By controlling the operation of the external pump, the aeration pipe aerates the reaction chamber through the air nozzle. When the aeration pipe is in use, a temperature sensor monitors the gas temperature inside the aeration pipe. When the temperature is low, the electric heating group on the temperature control box heats the aeration pipe to increase the gas temperature inside the aeration pipe, thus avoiding the impact of low gas temperature on the microorganisms in the reaction chamber.

[0020] 5. The purification membrane system for high-altitude aquaculture wastewater treatment exemplified by the present invention uses airflow to push the installation frame to move repeatedly on both sides of the treatment box. During the movement of the installation frame, the cleaning strips set on the installation frame clean the membrane reactor, preventing solid pollutants in the wastewater from clogging the membrane reactor and affecting the wastewater treatment efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the anaerobic fermenter in this invention;

[0023] Figure 3 This is a cross-sectional view of the extraction tube in this invention;

[0024] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0025] Figure 5 This is a schematic diagram of the structure of the filter cartridge and the treatment box in this invention;

[0026] Figure 6 This is a cross-sectional view of the filter cartridge in this invention;

[0027] Figure 7 for Figure 6 Enlarged structural diagram at point B;

[0028] Figure 8 for Figure 6 A schematic diagram of the structure after the conveyor components have been removed;

[0029] Figure 9 This is a schematic diagram of the side cross-sectional structure of the processing box in this invention;

[0030] Figure 10 This is a schematic cross-sectional view of the top of the processing box in this invention;

[0031] Figure 11 This is a schematic diagram of the processing box from another perspective in this invention;

[0032] Figure 12 for Figure 11 Enlarged structural diagram at point C;

[0033] Figure 13 A schematic diagram of the treatment box after the cleaning components have been removed;

[0034] Figure 14 This is a schematic diagram of the cleaning component in this invention.

[0035] In the diagram: 1 Anaerobic fermenter, 11 Waste injection pipe, 12 Positioning frame, 13 Transparent plate, 14 Protective frame, 15 Protective net, 16 Guide pipe, 17 Sluice, 18 Water supply pipe, 2 Collection box, 21 Pump set, 22 Extraction pipe, 23 Moving pipe, 24 Positioning rod, 25 Cone, 26 Snap ring, 27 Downflow pipe, 3 Filter cartridge, 31 Mounting shaft, 32 Spiral blade, 33 Motor set, 34 Collection box, 35 Filter screen, 36 Connecting pipe, 37 Check valve, 38 Bracket, 4 Guide rod 41 Positioning plate, 42 Circular plate, 43 Spring, 5 Processing box, 51 Partition plate, 52 Membrane reactor, 53 Inlet pipe, 54 Outlet pipe, 55 Drainage pipe, 56 Clean water pipe, 57 First magnetic component, 6 Aeration pipe, 61 Air nozzle, 62 Temperature sensor, 63 Temperature control box, 64 Electric heating group, 7 Mounting frame, 71 Mounting bracket, 72 Cleaning strip, 73 Second magnetic component, 8 Exhaust pipe, 81 Pressure relief valve, 82 Mounting box, 83 Piston, 84 Push rod, 85 Elastic element. Detailed Implementation

[0036] 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.

[0037] Please see Figure 1-14 This invention provides a technical solution: a purification membrane system for treating aquaculture wastewater at high altitudes, comprising an anaerobic digester 1, a collection box 2, a filter cartridge 3, and a treatment box 5. The top of the anaerobic digester 1 is open, and a transparent protective cover is provided on the top of the anaerobic digester 1. The protective cover includes a positioning frame 12, and several transparent plates 13 are installed inside the positioning frame 12. The transparent plates 13 are preferably glass plates. A waste inlet pipe 11 communicating with the inner cavity of the anaerobic digester 1 is installed on the side of the anaerobic digester 1. The waste inlet pipe 11 is used to treat aquaculture wastewater. Wastewater generated in the process is injected into anaerobic digester 1. On sunny days, sunlight enters anaerobic digester 1 through transparent plate 13, raising the temperature inside anaerobic digester 1 and facilitating the reproduction of anaerobic microorganisms. The anaerobic microorganisms decompose the organic matter in the wastewater to form biogas, which can be used for heating or power generation in the farm. On dark or cloudy days, an insulation layer, such as straw mats or insulation cotton, is laid on the protective cover to reduce the heat loss from anaerobic digester 1 and prevent the anaerobic microorganisms from losing their activity and failing to decompose organic matter due to the low temperature in high-altitude areas.

[0038] An annular chute 17 is provided on the upper inner side of the anaerobic digester 1. A water supply pipe 18 is installed on the side of the anaerobic digester 1, which is connected to the bottom of the inner cavity of the chute 17. The other end of the water supply pipe 18 is fixed to the side of the collection box 2 and is connected to the inner cavity of the collection box 2. Under the influence of light and the decomposition of organic matter by microorganisms, the temperature inside the anaerobic digester 1 rises, causing some water molecules in the sewage to evaporate and condense on the protective cover. The protective cover has an inverted conical structure, which facilitates the accumulation of condensed water and its downward flow. The chute 17 is used to collect the accumulated water flow, and the water flow collected in the chute 17 flows into the collection box 2 through the water supply pipe 18. This process can assist in the treatment of sewage in the anaerobic digester 1.

[0039] The side of the collection box 2 is provided with a pipe that communicates with the bottom of the inner cavity of the anaerobic digester 1, and a pump set 21 that communicates with the inner cavity is installed on the side of the collection box 2. The pump set 21 is controlled to work and can be used to extract gas from the collection box 2, thereby reducing the pressure inside the collection box 2 and making it easier for the collection box 2 to extract sewage from the anaerobic digester 1 through the pipe.

[0040] The pipeline includes an extraction pipe 22, which is installed on the collection box 2 and communicates with the upper part of the inner cavity of the collection box 2 to prevent the sewage drawn into the collection box 2 from flowing back. The portion of the extraction pipe 22 inside the anaerobic digester 1 is vertically arranged. A movable pipe 23 is slidably installed inside the extraction pipe 22, with its bottom end located at the bottom of the inner cavity of the anaerobic digester 1 for extracting sewage from the anaerobic digester 1. A positioning rod 24 is fixed inside the extraction pipe 22, and a cone 25 located inside the movable pipe 23 is fixed at the bottom of the positioning rod 24. During the process of extracting sewage through the pipeline, livestock and poultry excrement accumulated at the bottom of the inner cavity of the anaerobic digester 1 is extracted. Solid pollutants such as feed or hay residue enter the pipe along with the sewage. If the solid pollutants accumulate and block the moving pipe 23, causing the moving pipe 23 to reduce its sewage suction capacity, the moving pipe 23 moves within the extraction pipe 22 under the influence of the suction force of the pump unit 21 on the side of the collection box 2. During the relative movement of the extraction pipe 22 and the moving pipe 23, the positioning rod 24 installed in the extraction pipe 22 applies force to the pollutants accumulated in the moving pipe 23 through the cone 25 installed at its end, which facilitates the unblocking of the moving pipe 23, prevents solid pollutants from accumulating and blocking the narrower moving pipe 23, and ensures that the moving pipe 23 can effectively extract sewage.

[0041] A retaining ring 26 is fixed inside the anaerobic digester 1 and is sleeved on the outside of the moving pipe 23. A protrusion is provided in the middle of the side of the moving pipe 23 and is located above the retaining ring 26. The retaining ring 26 is used to position the moving pipe 23. When the moving pipe 23 is blocked and moves upward under the suction force, the retaining ring 26 limits and guides the movement of the moving pipe 23, improving the stability of the moving pipe 23 when it moves. After the cone 25 clears the blockage in the moving pipe 23, the moving pipe 23 is no longer under the suction force and falls down automatically. The retaining ring 26 restricts the protrusion of the moving pipe 23 to prevent the moving pipe 23 from falling out of the extraction pipe 22 due to excessive downward movement. At the same time, it prevents the bottom of the moving pipe 23 from sticking to the bottom of the anaerobic digester 1 and failing to effectively extract sewage.

[0042] Several protective frames 14 are provided along the inner edge of the anaerobic digester 1. The protective frames 14 have installation ports on their sides, and protective nets 15 are installed in the installation ports. A guide pipe 16 is provided between two adjacent protective frames 14 and communicates with the bottom of their inner cavity. The pipe is located inside one of the protective frames 14. The multiple protective frames 14 are used to filter sewage in the sludge. Sewage seeps into the protective frames 14 through the protective nets 15. The protective nets 15 filter and block larger solid pollutants, reducing the content of solid pollutants in the extracted sewage. The sewage in the multiple protective frames 14 flows through the guide pipe 16, which facilitates the extraction of sewage from the anaerobic digester 1 through the pipe.

[0043] A downpipe 27 connected to the inner cavity of the filter cylinder 3 is installed on the lower side of the collection box 2. When the collection box 2 draws out the sewage in the anaerobic fermenter 1, some sewage flows into the filter cylinder 3 through the downpipe 27. When the sewage in the collection box 2 is drawn to a certain amount, the pump set 21 can be turned off, so that the sewage in the collection box 2 will automatically flow down into the filter cylinder 3 by gravity, which is convenient for secondary filtration treatment of sewage.

[0044] The filter cylinder 3 is inclined and has an open top. A solid conveying component is installed inside the filter cylinder 3, and a squeezing component is installed at the open end of the filter cylinder 3. A filter component is installed on the lower side of the filter cylinder 3, and a connecting pipe 36 is installed on the side of the filter component to connect to the inner cavity of the treatment tank 5. After the sewage enters the filter cylinder 3, the filter component filters the solid pollutants in the sewage, and the filtered solid pollutants are conveyed obliquely upward by the solid conveying component. After being conveyed to the squeezing component, the squeezing component squeezes the sewage in the solid pollutants. A bracket 38 for positioning the filter cylinder 3 is installed on the side of the treatment tank 5. The bracket 38 installed on the side of the treatment tank 5 positions and supports the filter cylinder 3, which facilitates the installation and use of the filter cylinder 3.

[0045] The filtration assembly includes a collection box 34 installed on the side of the filter cartridge 3. The side of the filter cartridge 3 has a communication port that communicates with the inner cavity of the collection box 34. A filter screen 35 is installed in the communication port. After sewage flows into the filter cartridge 3 through the downpipe 27, the filter screen 35 filters the solid pollutants in the sewage. The filtered sewage enters the collection box 34 through the filter screen 35. A connecting pipe 36 is installed on the side of the collection box 34 and communicates with the inner cavity of the collection box 34. A one-way valve 37 is installed on the connecting pipe 36. The sewage in the collection box 34 enters the treatment tank 5 through the connecting pipe 36. The one-way valve 37 prevents the sewage in the connecting pipe 36 from flowing back.

[0046] The solid conveying assembly includes a motor unit 33 installed outside the filter cartridge 3. The output shaft of the motor unit 33 is equipped with an installation shaft 31 located inside the filter cartridge 3, and a spiral blade 32 is installed on the installation shaft 31. The motor unit 33 controls the operation of the motor unit 33, drives the installation shaft 31 to rotate the spiral blade 32, and the spiral blade 32 pushes the solid pollutants filtered at the filter screen 35 to move obliquely upward.

[0047] The end of the mounting shaft 31 is rotatably mounted with a guide rod 4 via a sleeve. The guide rod 4 is not affected by the speed of the motor unit 33, which facilitates the use of the extrusion assembly. The extrusion assembly includes a positioning plate 41 slidably mounted on the guide rod 4, a circular plate 42 fixed at the end of the guide rod 4, and a spring 43 sleeved on the outside of the guide rod 4. The spring 43 is located between the positioning plate 41 and the circular plate 42. The spring 43 positions the positioning plate 41 by its elastic action. As solid pollutants accumulate at the upper end of the filter cylinder 3, the spiral blade 32 and the positioning plate 41 extrude wastewater from the solid pollutants. The extruded wastewater flows downward along the inclined filter cylinder 3 into the collection box 34. The pollutants after dehydration and drying exert a force on the positioning plate 41 under the action of the spiral blade 32. When this force is greater than the elastic support force of the spring 43, the positioning plate 41 compresses the spring 43, deforms it, and moves along the guide rod 4, which facilitates the discharge of the dehydrated solid pollutants from the filter cylinder 3 for unified treatment.

[0048] The treatment tank 5 is equipped with an aeration assembly and several sets of membrane reactors 52. A cleaning assembly is installed on the inner side of the treatment tank 5 near the membrane reactors 52. A partition 51 is fixed inside the treatment tank 5, which divides the inner cavity of the treatment tank 5 into a reaction chamber and a treatment chamber. The aeration assembly is located in the reaction chamber, and the several sets of membrane reactors 52 are located in the treatment chamber. An inlet pipe 53 communicating with the inner cavity of the several sets of membrane reactors 52 is installed on the lower side of the partition 51. An outlet pipe 54 communicating with the inner cavity of the several sets of membrane reactors 52 is installed on the upper side of the treatment tank 5. A drain pipe 55 is provided between two adjacent membrane reactors 52. A purified water pipe 56 communicating with the inner cavity of the several drain pipes 55 is installed on the side of the treatment tank 5.

[0049] After the wastewater flows into the reaction chamber, under the oxygen supply of the aeration components, aerobic microorganisms use oxygen to decompose the organic matter in the wastewater into harmless substances such as carbon dioxide and water. At the same time, nitrifying bacteria remove ammonia nitrogen from the wastewater, and polyphosphate-accumulating microorganisms in the aerobic environment take up excess phosphorus and store it in the form of polyphosphate in their cells, thus achieving the effect of phosphorus removal. After being acted upon by aerobic bacteria, the wastewater enters the membrane reactor 52 through the inlet pipe 53. The wastewater is filtered using a bottom-inlet and top-outlet method. The filtered clean water is discharged through the membrane reactor 52 and accumulates in the treatment chamber. It is then drained through the drainage pipe 55 into the clean water pipe 56 for discharge and can be used for green plant irrigation, etc. After being filtered by the membrane reactor 52, the wastewater is discharged through the outlet pipe 54 and can be drained into the anaerobic fermentation tank 1 for re-filtration. It should be noted that a solenoid valve is installed at the end of the inlet pipe 53 near the partition 51. By controlling the opening and closing of the solenoid valve, it is easy to control the water flow rate and water flow time in the membrane reactor 52.

[0050] The aeration assembly includes an aeration pipe 6 installed on the lower side of the treatment tank 5. Several air nozzles 61 connected to the inner cavity of the aeration pipe 6 are installed on the side of the aeration pipe 6, and all air nozzles 61 are located inside the reaction chamber. After connecting the aeration pipe 6 to an external pump, the operation of the external pump is controlled to aerate the aeration pipe 6 into the reaction chamber through the air nozzles 61. Because the oxygen concentration is low in high-altitude areas, an oxygen tank can be set up to assist aeration, which facilitates the treatment of sewage by aerobic microorganisms.

[0051] A temperature sensor 62 is installed on the side of the aeration pipe 6, and the detection end of the temperature sensor 62 is located inside the aeration pipe 6. A temperature control box 63 is installed on the outside of the aeration pipe 6, and an electric heating group 64 is installed on the side of the temperature control box 63. The heating end of the electric heating group 64 is in contact with the side of the aeration pipe 6. Both the temperature sensor 62 and the temperature control box 63 are located outside the processing box 5. When the aeration pipe 6 is in use, the temperature sensor 62 monitors the gas temperature inside the aeration pipe 6. When the temperature is low, the electric heating group 64 on the temperature control box 63 works to heat the aeration pipe 6, thereby increasing the gas temperature inside the aeration pipe 6 and preventing the low gas temperature from affecting the microorganisms in the reaction chamber.

[0052] The cleaning assembly includes a mounting frame 7 that slides on the top of the treatment chamber. Several mounting brackets 71 are fixed to the side of the mounting frame 7, and the mounting brackets 71 are staggered with the membrane reactor 52. Several cleaning strips 72 are fixed to the side of the mounting brackets 71. By controlling the mounting frame 7 to move repeatedly on the top of the treatment chamber, the cleaning strips 72 installed on the mounting brackets 71 clean the membrane reactor 52, preventing solid pollutants in the sewage from clogging the membrane reactor 52 and affecting the sewage treatment efficiency. Before the membrane reactor 52 filters the aquaculture sewage, the protective net 15 and filter screen 35 set up first play a filtering role, extending the service life of the membrane reactor 52.

[0053] Both sides of the processing box 5 are equipped with mounting boxes 82, and the sides of the mounting boxes 82 are provided with air vents that communicate with the inner cavity of the processing box 5. The air vents are located in the middle of the side of the mounting frame 7. A piston 83 is slidably installed in the mounting box 82. A push rod 84 is fixed to the side of the piston 83. The push rod 84 extends into the processing cavity through the air vent. An elastic element 85 is provided on the side of the piston 83 away from the air vent, located in the mounting box 82. A limiting plate is provided in the mounting box 82 to limit the piston 83. The limiting plate prevents the elastic element 85 from pushing the piston 83 out of the mounting box 82. An exhaust pipe 8 is installed on the side of the processing box 5 and communicates with the top of the reaction chamber. A pressure relief valve 81 is installed on the exhaust pipe 8. The end of the exhaust pipe 8 away from the reaction chamber communicates with the inner cavity of the mounting box 82. A first magnetic component 57 is installed on both sides of the processing box 5 near the mounting frame 7. A second magnetic component 73 is installed on the side of the mounting frame 7 at the position corresponding to the first magnetic component 57. The first magnetic component 57 and the second magnetic component 73 attract each other.

[0054] In use, the mounting frame 7 is first moved to one side of the treatment box 5. During the movement, the first magnetic component 57 on that side attracts the second magnetic component 73, effectively fitting the mounting frame 7 to that side of the treatment box 5. After the mounting frame 7 and that side of the treatment box 5 are fitted together, the mounting frame 7 drives the piston 83 to move within the mounting box 82 via the push rod 84. This causes the piston 83 to move to the rear of the connection between the exhaust pipe 8 and the mounting box 82, where the mounting box 82 and the exhaust pipe 8 are in communication. The use of the aeration component and the decomposition of organic matter by aerobic microorganisms to produce carbon dioxide will cause the gas pressure in the reaction chamber to rise. When the gas pressure reaches a certain value, the gas pressure opens the pressure relief valve 81 and delivers airflow along the exhaust pipe 8 to the mounting box 82. The airflow entering the mounting box 82 is ejected through the blower, and the ejected airflow pushes the mounting... The frame 7 moves and separates from the side of the treatment box 5, and the mounting frame 7 moves towards the other side of the treatment box 5 under the push of the airflow. When the second magnetic component 73 on the side of the mounting frame 7 approaches the first magnetic component 57 on the other side of the treatment box 5, the first magnetic component 57 attracts the second magnetic component 73, making the mounting frame 7 fit against the other side of the treatment box 5. After the mounting frame 7 moves away from the side of the treatment box 5, the elastic element 85 pushes the piston 83 to move and block the connection between the mounting box 82 and the exhaust pipe 8. When the exhaust pipe 8 exhausts next time, the airflow can only be discharged through the mounting box 82 on the other side, which makes it easy to push the mounting frame 7 to move repeatedly on both sides of the treatment box 5 by the airflow. During the movement of the mounting frame 7, the cleaning strip 72 set on the mounting frame 71 cleans the membrane reactor 52, which facilitates the use of the cleaning component.

[0055] The pump group 21, motor group 33, temperature sensor 62, electric heating group 64, etc. used in this invention are all commonly used electronic components in the prior art. Their working methods and circuit structures are all known technologies. The operation of the pump group 21, motor group 33, temperature sensor 62, electric heating group 64, etc. is controlled by setting a switch group or PLC controller. This method is a common technical solution used by technicians and will not be described in detail here. It should be noted that each group structure in this invention is made of heat-insulating material or wrapped with a heat-insulating layer on the structure in contact with the external environment to ensure the activity of various microorganisms.

[0056] This invention reduces the content of solid waste, feed residue, and animal hair in aquaculture wastewater by filtering it multiple times, thereby extending the single-use cycle of the membrane reactor, reducing the frequency of cleaning or replacement, and improving wastewater treatment efficiency. In addition, the temperature in this purification membrane system is controllable, which facilitates the survival and reproduction of anaerobic and aerobic microorganisms, and facilitates the treatment of organic matter, nitrogen, phosphorus and other nutrients in the wastewater, thus improving the quality of aquaculture wastewater treatment.

[0057] All parts not disclosed in this invention are prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A purification membrane system for treating aquaculture wastewater at high altitudes, comprising an anaerobic digester (1), a collection tank (2), a filter cartridge (3), and a treatment tank (5), characterized in that: The anaerobic fermenter (1) is open at the top and has a transparent protective cover. The collection box (2) has a pipe connected to the bottom of the inner cavity of the anaerobic fermenter (1) on its side and a pump group (21) connected to its inner cavity on its side. The collection box (2) has a downflow pipe (27) connected to the inner cavity of the filter cylinder (3) on its lower side. The filter cylinder (3) is inclined and has an open top. The filter cylinder (3) has a solid conveying component inside and a squeezing component at the open part of the filter cylinder (3). The filter cylinder (3) has a filter component at the lower side and a connecting pipe (36) connected to the inner cavity of the treatment box (5) on its side. The treatment box (5) has an aeration component and several membrane reactors (52) inside and a cleaning component is located near the membrane reactors (52) on the inner side of the treatment box (5). The pipeline includes an extraction pipe (22), and the portion of the extraction pipe (22) located inside the anaerobic fermenter (1) is vertically arranged. A movable pipe (23) is slidably arranged inside the extraction pipe (22). A positioning rod (24) is fixed inside the extraction pipe (22). A cone (25) located inside the movable pipe (23) is fixed at the bottom of the positioning rod (24). A retaining ring (26) is fixed inside the anaerobic fermenter (1), and the retaining ring (26) is sleeved on the outside of the movable pipe (23). A protrusion is provided in the middle of the side of the movable pipe (23), and the protrusion is located above the retaining ring (26).

2. The purification membrane system for high-altitude aquaculture wastewater treatment according to claim 1, characterized in that: The anaerobic fermenter (1) has a sludge injection pipe (11) connected to its inner cavity installed on its side. The protective cover includes a positioning frame (12) with several transparent plates (13) installed inside the positioning frame (12). An annular chute (17) is provided on the upper part of the inner side of the anaerobic fermenter (1). A water supply pipe (18) connected to the bottom of the inner cavity of the chute (17) is installed on the side of the anaerobic fermenter (1). The other end of the water supply pipe (18) is fixed to the side of the collection box (2) and connected to the inner cavity of the collection box (2).

3. The purification membrane system for high-altitude aquaculture wastewater treatment according to claim 1, characterized in that: The anaerobic fermenter (1) has several protective frames (14) on its inner edge. The protective frames (14) have an installation port on their side, and a protective net (15) is installed in the installation port. A guide pipe (16) communicating with the bottom of the inner cavity is provided between two adjacent protective frames (14), and the pipe is located in one of the protective frames (14).

4. The purification membrane system for high-altitude aquaculture wastewater treatment according to claim 1, characterized in that: The filter assembly includes a collection box (34) installed on the side of the filter cylinder (3). The side of the filter cylinder (3) has a communication port that communicates with the inner cavity of the collection box (34). A filter screen (35) is installed in the communication port. A connecting pipe (36) is installed on the side of the collection box (34) and communicates with the inner cavity of the collection box (34). A one-way valve (37) is installed on the connecting pipe (36). The solid conveying assembly includes a motor unit (33) installed outside the filter cylinder (3). An installation shaft (31) located inside the filter cylinder (3) is installed on the output shaft of the motor unit (33), and a spiral blade (32) is installed on the installation shaft (31). A bracket (38) for positioning the filter cylinder (3) is installed on the side of the processing box (5).

5. The purification membrane system for high-altitude aquaculture wastewater treatment according to claim 4, characterized in that: The mounting shaft (31) is rotatably mounted with a guide rod (4). The extrusion assembly includes a positioning plate (41) slidably disposed on the guide rod (4). A circular plate (42) is fixed to the end of the guide rod (4). A spring (43) is sleeved on the outside of the guide rod (4), and the spring (43) is located between the positioning plate (41) and the circular plate (42).

6. The purification membrane system for high-altitude aquaculture wastewater treatment according to claim 1, characterized in that: The treatment box (5) is fixed with a partition (51), which divides the inner cavity of the treatment box (5) into a reaction chamber and a treatment chamber. The aeration component is located in the reaction chamber, and several sets of membrane reactors (52) are located in the treatment chamber. The lower side of the partition (51) is equipped with an inlet pipe (53) that communicates with the inner cavity of several sets of membrane reactors (52). The upper side of the treatment box (5) is equipped with an outlet pipe (54) that communicates with the inner cavity of several sets of membrane reactors (52). A drain pipe (55) is provided between two adjacent membrane reactors (52). The side of the treatment box (5) is equipped with a purified water pipe (56) that communicates with the inner cavity of several drain pipes (55).

7. The purification membrane system for high-altitude aquaculture wastewater treatment according to claim 6, characterized in that: The aeration assembly includes an aeration pipe (6) installed on the lower side of the treatment tank (5). Several air nozzles (61) communicating with its inner cavity are installed on the side of the aeration pipe (6), and the several air nozzles (61) are all located inside the reaction chamber. A temperature sensor (62) is installed on the side of the aeration pipe (6), and the detection end of the temperature sensor (62) is located inside the aeration pipe (6). A temperature control box (63) is installed on the outside of the aeration pipe (6), and an electric heating group (64) is installed on the side of the temperature control box (63). The heating end of the electric heating group (64) is in contact with the side of the aeration pipe (6). The temperature sensor (62) and the temperature control box (63) are both located outside the treatment tank (5).

8. The purification membrane system for high-altitude aquaculture wastewater treatment according to claim 6, characterized in that: The cleaning assembly includes a mounting frame (7) slidably disposed on the top of the processing chamber. Several mounting brackets (71) are fixed on the side of the mounting frame (7), and the mounting brackets (71) are staggered with the membrane reactor (52). Several cleaning strips (72) are fixed on the side of the mounting brackets (71).

9. The purification membrane system for high-altitude aquaculture wastewater treatment according to claim 8, characterized in that: The processing box (5) is equipped with mounting boxes (82) on both sides, and the mounting box (82) has an air outlet on its side that communicates with the inner cavity of the processing box (5). The air outlet is located in the middle of the side of the mounting frame (7). A piston (83) is slidably installed in the mounting box (82). A push rod (84) is fixed on the side of the piston (83). The push rod (84) extends into the processing cavity through the air outlet. An elastic element (85) is provided on the side of the piston (83) away from the air outlet, located in the mounting box (82). The mounting box (82) is provided with a counter-piston (83). The processing box (5) is equipped with a limiting plate for limiting the position. An exhaust pipe (8) connected to the top of the reaction chamber is installed on the side of the processing box (5). A pressure relief valve (81) is installed on the exhaust pipe (8). The end of the exhaust pipe (8) away from the reaction chamber is connected to the inner cavity of the mounting box (82). A first magnetic component (57) is installed on both sides of the processing box (5) near the mounting frame (7). A second magnetic component (73) is installed on the side of the mounting frame (7) at the position corresponding to the first magnetic component (57). The first magnetic component (57) and the second magnetic component (73) attract each other.

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