Treatment system for purifying and circulating breeding wastewater by adopting myriophyllum spicatum

Abstract

The invention discloses a treatment system for purifying and circulating breeding wastewater by adopting myriophyllum spicatum, and relates to the technical field of wastewater treatment.The treatment system comprises a plurality of wastewater treatment ponds, the wastewater treatment ponds comprise microfiltration ponds, microfiltration assemblies are fixed to the upper end faces of the microfiltration ponds, sedimentation ponds are fixed to one sides of the microfiltration ponds, brush ponds are fixed to one sides of the sedimentation ponds, and the brush ponds are fixed to the other sides of the sedimentation ponds; a plurality of brushes are placed in the brush tank, an aeration tank is fixed to one side of the brush tank, a plant purification tank is fixed to one side of the aeration tank, a floating assembly is arranged in the plant purification tank, a rattan cotton tank is fixed to one side of the plant purification tank, and a plurality of rattan cotton is detachably installed in the rattan cotton tank. A water purification tank is fixed on one side of the rattan cotton tank, a sewage discharge tank is fixed on one side of the water purification tank, the sewage discharge tank is communicated with the microfiltration assembly, and the plurality of wastewater treatment tanks are communicated through pipelines.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a treatment system for purifying and circulating aquaculture wastewater by using Myriophyllum splendens. Background Art

[0002] Currently, recirculating aquaculture systems consist of a water storage system, aquaculture ponds, a water circulation system, a sewage treatment system (filtration and sterilization system, biosorption system), a myriophyllum treatment system, and a power system. Myriophyllum is a perennial submerged herb with good tolerance to high concentrations of nitrogen and phosphorus in sewage, and is often used as a pioneer plant in treating polluted water. Myriophyllum absorbs and adsorbs heavy metals (such as cadmium, lead, chromium, and copper) in sewage, further enhancing its purification effectiveness.

[0003] At present, the foxtail algae in the foxtail algae treatment system is planted in a fixed floating bed, which causes the roots to be immersed in the anaerobic sludge layer for a long time and cause decay. In addition, microfiltration equipment is used for filtering during the initial treatment of wastewater. However, the microfiltration equipment will become clogged after long-term use, requiring frequent shutdown and backwashing operations, which affects the treatment efficiency of the wastewater. In addition, the impurities after filtration by the microfiltration equipment have a high water content, which affects the recycling and purification of the wastewater.

[0004] In view of the above problems, the present invention provides a treatment system for purifying and circulating aquaculture wastewater using Myriophyllum splendens to solve the above problems. Summary of the Invention

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a treatment system for purifying and circulating aquaculture wastewater using foxtail algae, comprising multiple wastewater treatment tanks, wherein the multiple wastewater treatment tanks include a microfiltration tank, a microfiltration component is fixed on the upper end face of the microfiltration tank, a sedimentation tank is fixed on one side of the sedimentation tank, a brush tank is fixed on one side of the sedimentation tank, a plurality of brushes are placed in the brush tank, an aeration tank is fixed on one side of the brush tank, a plant purification tank is fixed on one side of the aeration tank, a floating component is arranged in the plant purification tank, a rattan cotton tank is fixed on one side of the plant purification tank, a plurality of rattan cottons are detachably installed in the rattan cotton tank, a clean water tank is fixed on one side of the rattan cotton tank, a sewage tank is fixed on one side of the clean water tank, the sewage tank is connected to the microfiltration component, and the multiple wastewater treatment tanks are connected by pipelines.

[0006] Furthermore, preferably, a vibration bin is swingably provided in the sedimentation tank, a vibration motor is fixed to the outer wall of the sedimentation tank, the output end of the vibration motor is connected to the vibration bin, and the sewage treated by the microfiltration tank is discharged into the vibration bin, and a plurality of drainage holes are opened in the vibration bin, and the working state of the vibration motor is intermittent.

[0007] Further, preferably, the microfiltration component includes:

[0008] The shell has a sewage inlet on one side connected to the breeding pond;

[0009] a rotating motor fixed in the housing;

[0010] A rotating disc is rotatably disposed in the housing, is coaxially arranged with the sewage inlet, and is driven by the rotating motor;

[0011] A microfiltration cartridge is fixed in the housing and is rotatably connected to the rotating disk, wherein a plurality of filter holes are evenly spaced on the outer wall of the microfiltration cartridge;

[0012] A sewage outlet is provided on a side of the housing away from the sewage inlet, with one end being connected to the microfiltration cartridge and the other end being connected to the sewage tank;

[0013] An inner cleaning rod is fixed on the rotating disk and is located in the microfiltration cartridge. The inner cleaning rod is a shaftless screw rod, and an extrusion assembly is fixed to one end of the inner cleaning rod away from the rotating disk.

[0014] A drain outlet is provided at the bottom of the shell and is located above the microfiltration tank;

[0015] an external cleaning assembly, mounted in the housing;

[0016] The water squeezing bin is fixed in the shell and is communicated with the microfiltration cartridge and the sewage outlet. The inner wall of the water squeezing bin is provided with a guide surface inclined toward the microfiltration cartridge.

[0017] Furthermore, preferably, the extrusion assembly includes:

[0018] A fixed disc, fixed on the inner cleaning rod and in contact with the inner wall of the microfiltration cartridge;

[0019] a rotating shaft, rotatably disposed within the fixed disk;

[0020] The pressing shaft is installed in the rotating shaft using multiple hinged rods, and the hinged rods include a first column and a second column, the first column is hinged to the inner wall of the rotating shaft, the second column is hinged to the outer wall of the pressing shaft, and the first column and the second column are slidably connected, and a compression spring is installed at the sliding position;

[0021] A connecting shaft, fixed on the pressing shaft;

[0022] The extrusion roller is fixed on the outer wall of the connecting shaft, and the outer wall of the extrusion roller is provided with an extrusion surface, and the extrusion surface and the guide surface are arranged in close contact and have the same inclination angle.

[0023] Further, preferably, the external cleaning component includes:

[0024] A linear motor is fixed in the telescopic housing;

[0025] A cleaning ring is slidably sleeved on the outer wall of the microfiltration cartridge and driven by the linear motor;

[0026] A gas chamber is provided in the cleaning ring and is connected to an external gas source device;

[0027] The cleaning components are configured as a plurality of components, which are circumferentially arranged on the inner wall of the cleaning ring and correspond to the filter holes of the microfiltration cartridge.

[0028] Further, preferably, the cleaning component includes:

[0029] a sliding column, slidably disposed in the cleaning ring and driven by the gas pressure in the gas chamber;

[0030] a hinge ball hinged on the sliding post;

[0031] a cleaning column fixed to the hinged ball;

[0032] The auxiliary cleaning columns are configured as a plurality of columns, all of which are arranged on the outer wall of the cleaning column in an inclined circle, and the inclined direction is away from the sliding column.

[0033] Furthermore, preferably, the cleaning column and the auxiliary cleaning column are both made of flexible materials.

[0034] Furthermore, preferably, the floating assembly includes:

[0035] A floating plate is slidably arranged in the plant purification pool and has a plurality of water storage ports therein;

[0036] The planting bins are configured as a plurality of bins, fixed at equal intervals on the lower end surface of the floating plate, and each bin is provided with a plurality of water holes;

[0037] A driving member is mounted on the floating plate.

[0038] Further, preferably, the driving member is a pumping pump or a telescopic motor. When the driving member is a pumping pump, the pumping pump is connected to multiple water storage ports.

[0039] Compared with the prior art, the present invention provides a treatment system for purifying and recycling aquaculture wastewater using Myriophyllum truncatum, which has the following beneficial effects:

[0040] The present invention forms a complete physical-biological purification chain by connecting multiple wastewater treatment pools in series, thereby performing multi-stage purification of aquaculture wastewater and improving the purification effect. An inner cleaning rod is arranged inside the microfiltration cartridge and a cleaning ring is arranged outside to realize a two-way cleaning mechanism. When the inner cleaning rod rotates, it pushes large particles of impurities to move toward the sewage outlet to prevent blockage. The large particles of impurities can be squeezed by the extrusion component, thereby reducing the water content of the impurities, performing dry-wet separation, and promoting the recycling of wastewater. The cleaning ring is accurately inserted into the filter hole through a flexible cleaning column (air pressure drive + articulated ball adaptive angle), completely removing attachments, significantly improving filtration efficiency, and reducing shutdown backwashing time. The floating component can adapt to the water level so that the foxtail algae roots are always immersed in the optimal water depth and adapt to water flow fluctuations. The water hole promotes water circulation and improves the nitrogen and phosphorus absorption efficiency of the root system. The extraction pump adjusts the water volume of the water storage outlet to achieve precise control of buoyancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 The figure is a schematic cross-sectional view of the overall structure of a treatment system for purifying and recycling aquaculture wastewater using Myriophyllum truncatum;

[0042] Figure 2 A schematic diagram of the structure of a microfiltration component of a treatment system for purifying and recycling aquaculture wastewater using Myriophyllum truncatum;

[0043] Figure 3 A schematic diagram of the internal cleaning rod structure of a treatment system using foxtail algae to purify and recycle aquaculture wastewater;

[0044] Figure 4 A schematic diagram of the extruded component structure of a treatment system for purifying and recycling aquaculture wastewater using Myriophyllum truncatum;

[0045] Figure 5 This is a schematic diagram of the structure of the external cleaning component of a treatment system that uses foxtail algae to purify and circulate aquaculture wastewater;

[0046] Figure 6 A schematic diagram of the cleaning component structure of a treatment system that uses foxtail algae to purify and circulate aquaculture wastewater;

[0047] Figure 7 A schematic diagram of the floating component structure of a treatment system that uses foxtail algae to purify and circulate aquaculture wastewater;

[0048] Figure: 1. Microfiltration tank; 2. Microfiltration assembly; 3. Sedimentation tank; 31. Vibration motor; 32. Vibration chamber; 4. Brush tank; 41. Brush; 5. Aeration tank; 6. Plant purification tank; 7. Floating assembly; 8. Rattan cotton tank; 81. Rattan cotton; 9. Water purification tank; 10. Sewage tank; 21. Housing; 22. Sewage inlet; 23. Rotating disc; 24. Microfiltration cartridge; 25. Sewage outlet; 26. Internal cleaning rod; 27. Drain; 28. External cleaning assembly; 29. ​​Squeeze chamber ; 261. Extrusion assembly; 262. Fixed disk; 263. Rotating shaft; 264. Pressing shaft; 265. Articulated rod; 266. Connecting shaft; 267. Extrusion roller; 268. Extrusion surface; 281. Cleaning ring; 282. Gas chamber; 283. Cleaning assembly; 284. Sliding column; 285. Articulated ball; 286. Cleaning column; 286. Auxiliary cleaning column; 291. Guide surface; 71. Floating plate; 72. Water storage port; 73. Planting chamber; 74. Driving part. DETAILED DESCRIPTION

[0049] Reference Figure 1-Figure 7 The present invention provides a technical solution: a treatment system for purifying and circulating aquaculture wastewater using foxtail algae, comprising a plurality of wastewater treatment pools, wherein the plurality of wastewater treatment pools include a microfiltration pool 1, a microfiltration component 2 being fixed on the upper end face of the plurality of wastewater treatment pools, a sedimentation pool 3 being fixed on one side of the microfiltration pool 1, a brush pool 4 being fixed on one side of the sedimentation pool 3, a plurality of brushes 41 being placed in the brush pool 4, an aeration pool 5 being fixed on one side of the brush pool 4, a plant purification pool 6 being fixed on one side of the aeration pool 5, a floating component 7 being arranged in the plant purification pool 6, a rattan cotton pool 8 being fixed on one side of the plant purification pool 6, a plurality of rattan cottons 81 being detachably installed in the rattan cotton pool 8, a clean water pool 9 being fixed on one side of the clean water pool 9, a sewage pool 10 being fixed on one side of the sewage pool 10, the sewage pool 10 being connected to the microfiltration component 2, and the plurality of wastewater treatment pools being connected by pipelines.

[0050] Among them, by connecting multiple wastewater treatment tanks in series, microfiltration tank 1 → sedimentation tank 3 → brush tank 4 → aeration tank 5 → plant purification tank 6 (foxtail algae) → vine cotton tank 8 → water purification tank 9, a complete physical-biological purification chain is formed, thereby performing multi-stage purification of aquaculture wastewater and improving the purification effect, and ultraviolet lamps are installed in the water purification tank 9 to improve the purification effect.

[0051] In this embodiment, a vibration bin 32 is swingably provided in the sedimentation tank 3, a vibration motor 31 is fixed to the outer wall of the sedimentation tank 3, the output end of the vibration motor 31 is connected to the vibration bin 32, and the sewage treated by the microfiltration tank 1 is discharged into the vibration bin 32, and a plurality of drainage holes are opened in the vibration bin 32, and the working state of the vibration motor 31 is intermittent operation.

[0052] That is to say, the intermittent vibration motor 31 can intermittently vibrate the vibration chamber 32, thereby preventing the sediment from compacting and increasing the settling speed of the flocculants. In addition, by collecting the sediment in the vibration chamber 32, the sediment can be easily cleaned, avoiding the sediment from adhering to the bottom of the sedimentation tank 3 and being difficult to clean.

[0053] In this embodiment, the microfiltration component 2 includes:

[0054] The housing 21 has a sewage inlet 22 on one side that is connected to the breeding pond;

[0055] A rotating motor is fixed in the housing 21;

[0056] A rotating disc 23 is rotatably disposed in the housing 21 and coaxially arranged with the sewage inlet 22 and driven by the rotating motor;

[0057] The microfiltration cartridge 24 is fixed in the housing 21 and is rotatably connected to the rotating disk 23. The outer wall of the microfiltration cartridge 24 is provided with a plurality of filter holes at equal intervals.

[0058] The sewage outlet 25 is provided on a side of the housing 21 away from the sewage inlet 22 , and one end of the sewage outlet 25 is connected to the microfiltration cartridge 24 and the other end of the sewage outlet 25 is connected to the sewage tank 10 ;

[0059] An inner cleaning rod 26 is fixed to the rotating disk 23 and is located in the microfiltration cartridge 24. The inner cleaning rod 26 is a shaftless screw. An extrusion assembly 261 is fixed to one end of the inner cleaning rod 26 away from the rotating disk 23.

[0060] A drain outlet 27 is provided at the bottom of the housing 21 and is located above the microfiltration tank 1;

[0061] An external cleaning assembly 28 is installed in the housing 21;

[0062] The water squeezing chamber 29 is fixed in the housing 21 and is in communication with the microfiltration cartridge 24 and the sewage outlet 25 . The inner wall of the water squeezing chamber 29 is provided with a guide surface 291 inclined toward the microfiltration cartridge 24 .

[0063] As a preferred embodiment, the extrusion assembly 261 includes:

[0064] A fixed plate 262 is fixed to the inner cleaning rod 26 and is in contact with the inner wall of the microfiltration cartridge 24;

[0065] A rotating shaft 263 is rotatably disposed within the fixed disk 262;

[0066] The pressing shaft 264 is installed in the rotating shaft 263 using a plurality of hinged rods 265, and the hinged rods 265 include a first column and a second column. The first column is hinged to the inner wall of the rotating shaft 263, and the second column is hinged to the outer wall of the pressing shaft 264. The first column and the second column are slidably connected, and a compression spring is installed at the sliding position.

[0067] A connecting shaft 266 is fixed on the pressing shaft 264;

[0068] The squeezing roller 267 is fixed to the outer wall of the connecting shaft 266 , and an squeezing surface 268 is formed on the outer wall of the squeezing roller 267 . The squeezing surface 268 and the guide surface 291 are arranged in close contact and have the same inclination angle.

[0069] That is to say, when the inner cleaning rod 26 rotates, it can push large particles of impurities to move toward the sewage outlet 25 to prevent blockage, and the outer cleaning component 28 can clean the filter holes of the microfilter cartridge 24, thereby improving the cleaning effect through double cleaning.

[0070] In addition, when the inner cleaning rod 26 rotates, it drives the extrusion assembly to rotate along the inner wall of the microfilter cartridge 24, so that the extrusion roller 267 squeezes the impurities transported to the extrusion bin 29 to control the water, and when the extrusion roller 267 contacts the guide surface 291, when there are impurities between the extrusion roller 267 and the guide surface 291, the extrusion roller 267 slides through the extrusion spring in the hinged rod 265, thereby avoiding damage to the inner cleaning rod 26, and the extrusion spring can squeeze impurities of different sizes, improve the extrusion effect, and reduce the water content of the impurities. The squeezed wastewater can flow back to the microfilter cartridge 24 along the guide surface 291 and be discharged from the drain port 27 to participate in the purification cycle, so that more wastewater can be purified and circulated, thereby improving the utilization rate.

[0071] As a preferred embodiment, the external cleaning assembly 28 includes:

[0072] A linear motor is fixed in the telescopic housing 21;

[0073] The cleaning ring 281 is slidably sleeved on the outer wall of the microfiltration cartridge 24 and driven by the linear motor;

[0074] The gas chamber 282 is provided in the cleaning ring 281 and is connected to an external gas source device;

[0075] The cleaning components 283 are configured as a plurality and are circumferentially arranged on the inner wall of the cleaning ring 281 and correspond to the filter holes of the microfiltration cartridge 24 .

[0076] As a preferred embodiment, the cleaning component 283 includes:

[0077] A sliding post 284 is slidably disposed in the cleaning ring 281 and driven by the gas pressure in the gas chamber 282;

[0078] A hinge ball 285 hinged on the sliding post 284;

[0079] a cleaning post 286 fixed to the hinge ball 285;

[0080] The auxiliary cleaning posts 287 are configured as a plurality of them, all of which are arranged in an inclined circle on the outer wall of the cleaning post 286 , and the inclined direction is away from the sliding post 284 .

[0081] It should be noted that the inner cleaning rod 26 is always in a rotating state, so that large particles of impurities can be cleaned all the time to avoid being trapped in the microfiltration cartridge 24.

[0082] In addition, the external cleaning component 28 is intermittent cleaning. When not cleaning, the cleaning component 283 is located in the cleaning ring 281, and during cleaning, it is intermittently moved by the linear motor. The distance of each movement is the same as the filter hole interval of the microfilter cartridge 24. When the movement is completed, the sliding column 284 is pressed out by the external air source, so that the cleaning column 286 is inserted into the filter hole. When entering the filter hole, the inclined auxiliary cleaning column 287 is forced to bend in the direction away from the filter hole, and then rebounds and resets after passing through the filter hole, thereby swinging the cleaned impurities and causing the impurities to separate from the auxiliary cleaning column 287. And when the cleaning column 286 and the auxiliary cleaning column 287 are located inside the microfiltration cartridge 24, the rotating inner cleaning rod 26 can drive the water flow to further clean it to prevent impurities from adhering, and the hinged ball 285 can adaptively adjust the angle, so that the inner cleaning rod 26 deflects when it contacts the cleaning column 286 and the auxiliary cleaning column 287 to avoid damage. After the cleaning column 286 and the auxiliary cleaning column 287 are deflected, the tilted auxiliary cleaning column 287 can guide and reset them when the cleaning column 286 exits, thereby shrinking into the cleaning ring 281 to complete the cleaning.

[0083] As a preferred embodiment, the cleaning column 286 and the auxiliary cleaning column 287 are both made of flexible materials.

[0084] As a preferred embodiment, the floating assembly 7 includes:

[0085] A floating plate 71 is slidably disposed in the plant purification pool 6 and has a plurality of water storage ports 72 formed therein;

[0086] The planting bins 73 are configured in multiples and fixed at equal intervals on the lower end surface of the floating plate 71, and the planting bins 73 are provided with multiple water holes;

[0087] The driving member 74 is mounted on the floating plate 71 .

[0088] As a preferred embodiment, the driving member 74 is a pumping pump or a telescopic motor. When the driving member 74 is a pumping pump, the pumping pump is connected to multiple water storage ports 72.

[0089] Among them, the floating component 7 can adapt to the water level so that the roots of foxtail algae are always immersed in the optimal water depth, adapt to water flow fluctuations, promote water circulation through the water holes, improve the efficiency of nitrogen and phosphorus absorption by the roots, and the extraction pump adjusts the water volume at the water storage outlet to achieve precise control of buoyancy.

[0090] During specific implementation, multiple wastewater treatment tanks are first connected in series, and then the microfiltration component 2 is connected to the breeding tank to perform preliminary treatment on the wastewater. The wastewater after preliminary treatment is precipitated through the sedimentation tank 3, and then the fine suspended matter in the wastewater is removed by the brush 41. The wastewater then enters the aeration tank 5 for aeration treatment to increase the dissolved oxygen concentration. The foxtail algae in the plant purification tank 6 deeply denitrifies and removes phosphorus, absorbs heavy metals, and then the residual suspended matter is physically intercepted by the vine cotton tank 8. Finally, it is purified by the ultraviolet lamp tube of the water purification tank 9 to complete the multi-stage treatment of the wastewater.

[0091] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A treatment system for purifying and recycling aquaculture wastewater using Myriophyllum truncatum, characterized in that: The invention comprises a plurality of wastewater treatment pools, wherein the plurality of wastewater treatment pools comprise a microfiltration pool (1), the upper end surface of which is fixed with a microfiltration assembly (2), a sedimentation pool (3) being fixed on one side of the microfiltration pool (1), a brush pool (4) being fixed on one side of the sedimentation pool (3), a plurality of brushes (41) being placed in the brush pool (4), an aeration pool (5) being fixed on one side of the brush pool (4), a plant purification pool (6) being fixed on one side of the aeration pool (5), a floating assembly (7) being arranged in the plant purification pool (6), a rattan cotton pool (8) being fixed on one side of the plant purification pool (6), a plurality of rattan cottons (81) being detachably installed in the rattan cotton pool (8), a clean water pool (9) being fixed on one side of the clean water pool (9), a sewage pool (10) being fixed on one side of the sewage pool (10), the sewage pool (10) being connected to the microfiltration assembly (2), and the plurality of wastewater treatment pools being connected by pipelines.

2. A treatment system for purifying and recycling aquaculture wastewater using Myriophyllum according to claim 1, characterized in that: A vibration bin (32) is swingably provided in the sedimentation tank (3), a vibration motor (31) is fixed to the outer wall of the sedimentation tank (3), an output end of the vibration motor (31) is connected to the vibration bin (32), and sewage treated by the microfiltration tank (1) is discharged into the vibration bin (32), and a plurality of drainage holes are provided in the vibration bin (32), and the working state of the vibration motor (31) is intermittent operation.

3. The treatment system for purifying and recycling aquaculture wastewater using Myriophyllum as claimed in claim 1, characterized in that: The microfiltration component (2) comprises: The housing (21) has a sewage inlet (22) on one side connected to the breeding pond; A rotating motor fixed in the housing (21); A rotating disc (23) is rotatably disposed in the housing (21), is coaxially arranged with the sewage inlet (22), and is driven by the rotating motor; A microfiltration cartridge (24) is fixed in the housing (21) and is rotatably connected to the rotating disk (23); a plurality of filter holes are evenly spaced on the outer wall of the microfiltration cartridge (24); A sewage outlet (25) is provided on a side of the housing (21) away from the sewage inlet (22), with one end being in communication with the microfiltration cartridge (24) and the other end being in communication with the sewage tank (10); An inner cleaning rod (26) is fixed on the rotating disk (23) and is located in the microfiltration cartridge (24). The inner cleaning rod (26) is a shaftless screw. An extrusion assembly (261) is fixed to one end of the inner cleaning rod (26) away from the rotating disk (23). A drain outlet (27) is provided at the bottom of the housing (21) and is located above the microfiltration tank (1); An external cleaning assembly (28) mounted in the housing (21); The water squeezing chamber (29) is fixed in the housing (21) and is in communication with the microfiltration cartridge (24) and the sewage outlet (25). The inner wall of the water squeezing chamber (29) is provided with a guide surface (291) inclined toward the microfiltration cartridge (24).

4. A treatment system for purifying and recycling aquaculture wastewater using Myriophyllum as claimed in claim 3, characterized in that: The extrusion assembly (261) comprises: A fixed plate (262) is fixed on the inner cleaning rod (26) and is in contact with the inner wall of the microfiltration cartridge (24); a rotating shaft (263) rotatably disposed within the fixed disk (262); The pressing shaft (264) is installed in the rotating shaft (263) using a plurality of hinged rods (265), and the hinged rods (265) include a first column and a second column, the first column is hinged to the inner wall of the rotating shaft (263), the second column is hinged to the outer wall of the pressing shaft (264), and the first column and the second column are slidably connected, and a compression spring is installed at the sliding position; A connecting shaft (266) fixed on the pressing shaft (264); The squeezing roller (267) is fixed to the outer wall of the connecting shaft (266), and the outer wall of the squeezing roller (267) is provided with an squeezing surface (268). The squeezing surface (268) and the guide surface (291) are arranged in close contact and have the same inclination angle.

5. The treatment system for purifying and recycling aquaculture wastewater using Myriophyllum as claimed in claim 3, characterized in that: The external cleaning assembly (28) comprises: A linear motor fixed in the telescopic housing (21); A cleaning ring (281) is slidably sleeved on the outer wall of the microfiltration cartridge (24) and driven by the linear motor; A gas chamber (282) is provided in the cleaning ring (281) and is connected to an external gas source device; The cleaning components (283) are configured as a plurality of components, which are circumferentially arranged on the inner wall of the cleaning ring (281) and correspond to the filter holes of the microfiltration cartridge (24).

6. A treatment system for purifying and circulating aquaculture wastewater using Myriophyllum as claimed in claim 5, characterized in that: The cleaning component (283) includes: a sliding post (284) slidably disposed in the cleaning ring (281) and driven by the gas pressure in the gas chamber (282); A hinge ball (285) hinged on the sliding post (284); a cleaning post (286) fixed to the hinge ball (285); The auxiliary cleaning columns (287) are configured as a plurality of columns, all of which are arranged in an inclined circle on the outer wall of the cleaning column (286), and the inclined direction is away from the sliding column (284).

7. A treatment system for purifying and circulating aquaculture wastewater using Myriophyllum as claimed in claim 6, characterized in that: The cleaning column (286) and the auxiliary cleaning column (287) are both made of flexible materials.

8. The treatment system for purifying and recycling aquaculture wastewater using Myriophyllum as claimed in claim 1, characterized in that: The floating assembly (7) comprises: A floating plate (71) is slidably disposed in the plant purification pool (6) and has a plurality of water storage ports (72) formed therein; The planting bins (73) are configured as a plurality of bins, fixed at equal intervals on the lower end surface of the floating plate (71), and the planting bins (73) are provided with a plurality of water holes; A driving member (74) is mounted on the floating plate (71).

9. A treatment system for purifying and recycling aquaculture wastewater using Myriophyllum as claimed in claim 8, characterized in that: The driving member (74) is a pumping pump or a telescopic motor. When the driving member (74) is a pumping pump, the pumping pump is connected to a plurality of water storage ports (72).

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