A system and method for recycling and purifying wastewater produced by fermentation of stink catfish

Abstract

The present application relates to wastewater purification technical field, specifically to a kind of waste water of stink mandarin fish fermentation production circulation purification system and method thereof, including treatment pond, the treatment pond has the cavity with opening upwards, fixed mounting is installed in the cavity of the treatment pond, the cavity is divided into upper and lower two parts by partition, the surface of the partition is coaxially fixed and installed with microfiltration membrane, the surface of the treatment pond is rotatably connected with rotating shaft, the rotating shaft is coaxially movably penetrated microfiltration membrane, the surface of the rotating shaft is coaxially fixed and connected with shear blade, the gap between the shear blade and microfiltration membrane, the surface of the rotating shaft is coaxially fixed and connected with centrifugal flapper, the centrifugal flapper and shear blade are located in the upper part of the treatment pond cavity, the purpose of the present application is to solve the problem that traditional filter equipment handles colloid and is easy to gather on the surface of filter membrane and form filter cake layer, cause membrane flux to rapidly decline.

Description

Technical Field

[0001] This invention relates to the field of wastewater purification technology, specifically to a wastewater recycling and purification system and method for the production of fermented mandarin fish. Background Technology

[0002] Fermentation is a crucial step in the preparation of stinky mandarin fish, and the choice of fermentation container directly affects the quality of the fish. A special type of fermentation vessel, the earthenware jar, has become the ideal choice for fermenting stinky mandarin fish due to its superior characteristics. Earthenware jars are containers made through high-temperature firing, possessing unique physical properties. Their good air permeability and absorbency promote air circulation within the food, absorbing some odors and ensuring the pure taste of the ingredients. They also feature even heat transfer and slow heat dissipation, maintaining a suitable temperature during the simmering process, thus ensuring the deliciousness of the ingredients and facilitating the fermentation of the stinky mandarin fish, effectively improving its quality.

[0003] Wastewater generated during the fermentation of stinky mandarin fish in earthenware pots is a characteristic wastewater of the stinky mandarin fish production process. When the stinky mandarin fish ferments in earthenware pots, it relies on microorganisms to decompose the proteins, fats, and carbohydrates in the fish meat. The wastewater from the fermentation of earthenware pots is rich in a large number of submicron colloids. These submicron colloids mainly originate from extracellular polymers produced during the metabolism of microorganisms, as well as colloidal dispersion systems formed by incompletely decomposed protein and fat particles. They are in a stable suspended state in water. They not only make the wastewater appear turbid, but also adsorb a large amount of organic matter and odor substances, exacerbating the fishy smell of the wastewater and increasing the difficulty of treatment. Pretreatment to remove colloids is the key to ensuring the efficient operation of subsequent conventional sewage treatment units.

[0004] Because submicron colloids have small particle size and strong viscosity, in traditional wastewater treatment, filter membranes directly bear the high load of filtration, resulting in rapid wear and low efficiency. They also tend to quickly accumulate on the surface of the filter membrane to form a filter cake layer, leading to a sharp drop in membrane flux and the need for frequent shutdowns for cleaning. Summary of the Invention

[0005] The purpose of this invention is to provide a wastewater recycling and purification system and method for fermentation of mandarin fish, in order to solve the problem that traditional filtration equipment easily causes colloids to accumulate on the surface of the filter membrane to form a filter cake layer, resulting in a rapid decline in membrane flux.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A wastewater recycling and purification system for fermented mandarin fish includes a treatment tank with an upward-facing cavity. A partition plate is fixedly installed inside the cavity, dividing it into upper and lower parts. A microfiltration membrane is coaxially and fixedly installed on the surface of the partition plate. A rotating shaft is rotatably connected to the surface of the treatment tank, coaxially and movably penetrating the microfiltration membrane. Shear blades are coaxially and fixedly connected to the surface of the rotating shaft, with a gap between the shear blades and the microfiltration membrane. A centrifugal spade is coaxially and fixedly connected to the surface of the rotating shaft. Both the centrifugal spade and the shear blades are located in the upper part of the cavity of the treatment tank. A sedimentation tank is provided inside the cavity of the treatment tank, and an outlet pipe communicating with the cavity is installed at the bottom of the treatment tank.

[0008] Preferably, a receiving plate is placed on the bottom wall of the sedimentation tank, and a second screw is rotatably connected to the surface of the receiving plate. The bottom end of the second screw movably passes through the receiving plate and is coaxially fixedly connected to a support block. A limit cover that can slide up and down is installed on the surface of the second screw, and the width of the limit cover is the same as that of the receiving plate.

[0009] Preferably, the limiting cover includes a compression plate and a wall plate, the compression plate is installed between the inner walls of the wall plate, the second screw movably penetrates the surface of the compression plate, and the second screw and the compression plate are threaded together.

[0010] Preferably, the compression plate is slidably connected to the inner wall of the wall panel, a T-shaped slider is fixedly connected to the side of the compression plate, and a T-shaped groove is provided on the inner wall of the wall panel for the T-shaped slider to slide up and down.

[0011] Preferably, the second screw is driven by a motor assembly, which includes a drive motor and a mounting bracket. One end of the mounting bracket is fixedly connected to the drive motor, and the other end is detachably connected to the treatment tank. The output end of the drive motor is coaxially and fixedly connected to the top end of the second screw.

[0012] Preferably, a cleaning platform is installed above the treatment tank via a bracket, a connecting seat is installed at the front end of the cleaning platform, a clamping assembly is rotatably connected to the front end of the connecting seat, and a flow guide is provided at the bottom end of the cleaning platform.

[0013] Preferably, the clamping assembly includes a square frame and two symmetrically arranged clamping sleeves, the two clamping sleeves are slidably connected to the square frame, and each of the two clamping sleeves is fixedly connected to a jaw, the two jaws being arranged symmetrically.

[0014] A method for recycling and purifying wastewater from the fermentation of stinky mandarin fish, using the aforementioned wastewater recycling and purification system, comprises the following steps:

[0015] A. After the wastewater enters the treatment tank cavity, the drive shaft rotates, which in turn causes the centrifugal spatter and shear blades to rotate. The centrifugal force generated by the rotation of the centrifugal spatter throws the submicron colloids toward the inner wall of the treatment tank, and the resulting sediment falls into the sedimentation tank by gravity. The shear force generated by the rotation of the shear blades peels off the colloidal particles attached to the surface of the microfiltration membrane.

[0016] B. Slide the limiting cover downwards to cover the upper surface of the receiving plate, sealing the sediment. Then pull the second screw upwards to lift the receiving plate and the limiting cover, bringing the sediment out of the cavity as a whole.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This fermented mandarin fish wastewater recycling and purification system achieves efficient linkage between wastewater treatment, sedimentation and cleaning, and tank cleaning through structural optimization and functional synergistic design. The centrifugal spatula throws submicron colloids toward the tank wall by centrifugal force, reducing the filtration load on the microfiltration membrane. The microfiltration membrane retains colloidal particles. At the same time, the shear blades maintain a gap with the microfiltration membrane, and the shearing force generated by the rotation can peel off the colloids attached to the membrane surface in real time, avoiding the formation of filter cake layer and continuously maintaining the effective retention capacity of the membrane, which significantly improves the treatment efficiency and stability of wastewater containing submicron colloids.

[0019] 2. The receiving tray of the sedimentation tank can collect colloidal sediment in a concentrated manner. With the limiting cover, the sediment can be sealed and dehydrated, effectively reducing the water content in the sediment, reducing the volume, and facilitating subsequent processing. In addition, the receiving tray and limiting cover can be lifted as a whole by the second screw and the support block to prevent the sediment from scattering during cleaning. The operation is convenient and reduces human contact contamination.

[0020] 3. The clamping components of the cleaning platform replace manual lifting of the clay pots, avoiding the physical exertion of continuous manual lifting and reducing the risk of the pots slipping. Wastewater flows directly into the treatment pool through the diversion port to prevent spillage, achieving seamless connection between cleaning, water collection and treatment, and improving operational standardization. Attached Figure Description

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

[0022] Figure 2 This is a schematic diagram of the internal structure of the treatment tank of the present invention;

[0023] Figure 3 This is a schematic diagram of the vertical section of the treatment tank of the present invention;

[0024] Figure 4 This is a schematic diagram of the vertical section of the wall panel of the present invention;

[0025] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0026] Figure 6 This is a partial structural schematic diagram of the vertical section of the receiving plate of the present invention;

[0027] Figure 7 This is a schematic diagram of the gripper structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the vertical section of the clamping sleeve of the present invention.

[0029] In the diagram: 1. Treatment tank; 2. Cleaning platform; 3. Connecting seat; 4. Drive shaft; 5. Square frame; 6. First screw; 7. Clamping sleeve; 8. Gripper; 9. Guide port; 10. Divider plate; 11. Microfiltration membrane; 12. Rotating shaft; 13. Shear blade; 14. Centrifugal spatter; 15. Sedimentation tank; 16. Receiving plate; 17. Support block; 18. Second screw; 19. Compression plate; 20. T-shaped slider; 21. T-shaped chute; 22. Wall panel; 23. Drive motor; 24. Discharge pipe; 25. Mounting frame. Detailed Implementation

[0030] 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.

[0031] Please see Figures 1 to 8 The present invention provides a technical solution.

[0032] A wastewater recycling and purification system for fermented mandarin fish includes a treatment tank 1 with an upward-opening cavity. A partition plate 10 is fixedly installed inside the cavity, dividing it into upper and lower parts. A microfiltration membrane 11, such as a 0.2-0.8 μm microfiltration membrane, is coaxially and fixedly installed through the surface of the partition plate 10. A rotating shaft 12 is rotatably connected to the surface of the treatment tank 1, coaxially and movably penetrating the microfiltration membrane 11. The rotating shaft 12 is driven to rotate by a motor. A shearing blade 13 is coaxially and fixedly connected to the surface of the rotating shaft 12, with a gap between the shearing blade 13 and the microfiltration membrane 11, preferably 0.1-0.5 mm. A centrifugal spade 14 is connected to the treatment tank 1. Both the centrifugal spade 14 and the shearing blades 13 are located in the upper part of the treatment tank 1 cavity. A sedimentation tank 15 is provided in the treatment tank 1 cavity. An outlet pipe 24 is installed at the bottom of the treatment tank 1, which connects to the cavity. During operation, the wastewater from cleaning the fermentation tank of stinky mandarin fish enters the treatment tank 1 cavity. The centrifugal force generated by the rotation of the centrifugal spade 14 throws the submicron colloids toward the inner wall of the treatment tank. The precipitate formed falls into the sedimentation tank 15 by gravity. The clear liquid in the central area enters the lower part of the cavity through the microfiltration membrane 11 and enters the next process through the outlet pipe 24. At the same time, the shearing force generated by the rotation of the shearing blades 13 can peel off the colloidal particles attached to the surface of the microfiltration membrane 11, avoid the formation of a filter cake layer, and maintain its effective retention capacity.

[0033] A receiving plate 16 is placed on the bottom wall of the sedimentation tank 15. After the sediment falls into the sedimentation tank 15 by gravity, it will accumulate on the upper surface of the receiving plate 16. A second screw 18 is rotatably connected to the surface of the receiving plate 16. The bottom end of the second screw 18 moves through the receiving plate 16 and is coaxially fixedly connected to a support block 17. A limit cover that can slide up and down is installed on the surface of the second screw 18. The width of the limit cover is the same as that of the receiving plate 16. With the above design, when cleaning the sediment, the limit cover can be slid down first to cover the upper surface of the receiving plate 16 and seal the sediment. At this time, the second screw 18 is pulled up. Since the support block 17 can support the receiving plate 16, the receiving plate 16 and the limit cover are lifted simultaneously, and the sediment is taken out of the cavity as a whole. For this purpose, the diameter of the support block 17 is adaptively designed to be larger than the diameter of the second screw 18 so that the receiving plate 16 can be lifted.

[0034] The limiting cover includes a compression plate 19 and a wall plate 22. The compression plate 19 is installed between the inner walls of the wall plate 22 to form an enclosed structure. The second screw 18 moves through the surface of the compression plate 19 and is threadedly connected to the compression plate 19. When the second screw 18 is driven to rotate, the screw and the compression plate 19 are driven to move along the axial direction of the second screw 18 by the threaded transmission action, thereby driving the wall plate 22 to move synchronously, so as to realize the up and down sliding of the limiting cover as a whole.

[0035] The compression plate 19 is slidably connected to the inner wall of the wall panel 22. A T-shaped slider 20 is fixedly connected to the side of the compression plate 19. The inner wall of the wall panel 22 is provided with a T-shaped groove 21 for the T-shaped slider 20 to slide up and down. With the above configuration, in the initial state, when the wall panel 22 is not in contact with the receiving plate 16, the wall panel 22 tends to move downward under the action of gravity. At this time, the T-shaped slider 20 is located at the uppermost end of the T-shaped groove 21. When the limiting cover moves downward until the wall panel 22 contacts the upper surface of the receiving plate 16... The wall panel 22 stops moving downwards under the support of the receiving plate 16. At this time, the compression plate 19 can continue to move downwards along the T-shaped slide 21 to compress the sediment between it and the receiving plate 16 to discharge excess water. For this purpose, the surface of the compression plate 19 is provided with through holes, and a filter membrane of the same specifications as the microfiltration membrane 11 is installed at the through holes. This design allows water in the sediment to be discharged through the filter membrane, while retaining colloidal particles. This achieves both dehydration and balances the pressure of the compression space, ensuring that the compression plate 19 moves downwards smoothly in a closed state.

[0036] The second screw 18 is driven by a motor assembly, which includes a drive motor 23 and a mounting bracket 25. One end of the mounting bracket 25 is fixedly connected to the drive motor 23, and the other end is detachably connected to the treatment tank 1, for example, by bolts. The output end of the drive motor 23 is coaxially fixedly connected to the top end of the second screw 18 so that the screw can be driven to rotate by the rotation of the motor. When it is necessary to pull the second screw 18 upward to lift the receiving plate 16 and the limiting cover, the mounting bracket 25 can be removed first to release the fixation between the motor assembly and the treatment tank 1, and then the second screw 18 can be operated.

[0037] A cleaning platform 2 is mounted on top of the treatment tank 1 via a bracket. A connecting seat 3 is mounted on the front end of the cleaning platform 2, and a clamping component is rotatably connected to the front end of the connecting seat 3. A guide port 9 is provided at the bottom of the cleaning platform 2. The clamping component is used to clamp the earthenware pot used for fermenting stinky mandarin fish. Considering that the earthenware pot is heavy, traditional manual cleaning requires continuous lifting. The clamping component can replace manual lifting, and the clamping component can rotate to facilitate the overturning of the earthenware pot, so that the wastewater in the earthenware pot can be poured out smoothly during the cleaning process. The poured wastewater flows into the treatment tank 1 through the guide port 9 at the bottom of the cleaning platform 2. Conventionally, the cleaning platform 2 can be connected to a water source through a water pipe, and the end of the water pipe is connected to a nozzle so that the earthenware pot can be cleaned directly on the cleaning platform 2.

[0038] The clamping assembly includes a square frame 5 and two symmetrically arranged clamping sleeves 7. The two clamping sleeves 7 are slidably connected to the square frame 5. Each of the two clamping sleeves 7 is fixedly connected to a jaw 8. The two jaws 8 are arranged symmetrically. The earthenware pot is placed between the two jaws 8, and the earthenware pot is clamped by the relative movement of the two jaws 8.

[0039] A drive shaft 4 is coaxially fixedly connected to the rear side of the square frame 5. The drive shaft 4 is rotatably connected to the connecting seat 3. The drive shaft 4 is driven to rotate by a motor, so as to drive the entire clamping assembly to flip. The motor can be installed on the processing pool 1. The two clamping sleeves 7 are respectively rotatably connected to the opposite sides of the first screw 6. The two first screws 6 are respectively threaded to the two sides of the square frame 5. Each first screw 6 is driven to rotate by a motor installed on the surface of the corresponding clamping sleeve 7. When the motor drives the first screw 6 to rotate, since the position of the square frame 5 is fixed, the first screw 6 will drive the clamping sleeve 7 to move along the axial direction of the square frame 5 through thread transmission, thereby realizing the relative approach or distance of the two grippers 8.

[0040] The system also includes an equalization tank, a reaction tank, and a storage tank connected in sequence. The equalization tank is connected to the effluent pipe 24 of the treatment tank 1 via a pipeline, receiving the wastewater that has been preliminarily filtered by the treatment tank 1. The equalization tank is equipped with a pH adjustment device and a water temperature adjustment device, which can stabilize the pH value of the wastewater at 6-9 and control the water temperature at 20-30℃, creating suitable reaction conditions for the subsequent biological treatment stage. The inlet end of the reaction tank is connected to the outlet end of the equalization tank, receiving the wastewater after pH and water temperature adjustment. The reaction tank is equipped with an aeration device, which uses a microporous aerator to ensure uniform oxygen distribution and a stirring device. Through aeration and mixing, the efficiency of the biological reaction is enhanced. The storage tank is used to store the water that has undergone deep purification treatment in the reaction tank. Its inlet end is connected to the outlet end of the reaction tank, and its volume is designed according to the demand for recycled water. A water quality monitoring sensor is installed at the outlet of the storage tank, which can monitor the pH value, turbidity, COD and other indicators of the recycled water in real time. When the monitored indicators do not meet the recycled water standards, the water is returned to the equalization tank for reprocessing, forming a circulating purification mechanism.

[0041] A method for recycling and purifying wastewater from the fermentation of stinky mandarin fish, based on a wastewater recycling and purification system for the fermentation of stinky mandarin fish, includes the following specific steps:

[0042] A. Place the earthenware jar for fermenting stinky mandarin fish between the two jaws 8 of the cleaning platform 2. Start the motor on the surface of the clamping sleeve 7 to drive the first screw 6 to rotate. Use the threaded transmission to drive the clamping sleeve 7 to move axially along the square frame 5, so that the two jaws 8 are relatively close to each other, thereby clamping and fixing the earthenware jar. Clean the earthenware jar through the water pipe and spray nozzle connected to the cleaning platform 2. During the cleaning process, start the motor that drives the drive shaft 4 to rotate, drive the entire clamping assembly to flip the earthenware jar, so that the wastewater in the earthenware jar can be poured out smoothly. The poured wastewater flows into the treatment tank 1 through the guide port 9 at the bottom of the cleaning platform 2.

[0043] B. After the wastewater enters the treatment tank 1 chamber, the motor driving the rotating shaft 12 is started, which drives the rotating shaft 12 to rotate, thereby causing the centrifugal sling plate 14 and the shear blade 13 to rotate. The centrifugal force generated by the rotation of the centrifugal sling plate 14 throws the submicron colloids toward the inner wall of the treatment tank 1. The resulting sediment falls along gravity into the upper surface of the receiving plate 16 of the sedimentation tank 15. At the same time, the shear force generated by the rotation of the shear blade 13 peels off the colloidal particles attached to the surface of the microfiltration membrane 11, avoiding the formation of a filter cake layer and maintaining the effective retention capacity of the microfiltration membrane 11. The clear liquid in the central area enters the lower part of the chamber through the microfiltration membrane 11 and flows out to the equalization tank through the outlet pipe 24.

[0044] C. After the earthenware pot is cleaned, sedimentation is carried out. The drive motor 23 is started to drive the second screw 18 to rotate. The screw 18 and the compression plate 19 are driven by the thread transmission to move the compression plate 19 downward along the axis of the second screw 18, thereby driving the wall plate 22 to move downward synchronously. When the wall plate 22 contacts the upper surface of the receiving plate 16, the wall plate 22 stops moving downward under the support of the receiving plate 16. The compression plate 19 continues to move downward along the T-shaped slide 21 to compress the sediment between it and the receiving plate 16. The water in the sediment is discharged through the filter membrane installed at the through hole on the surface of the compression plate 19. After the compression is completed, the mounting bracket 25 is removed, the motor assembly is released from the treatment tank 1, and the second screw 18 is pulled upward. Under the action of the support block 17, the receiving plate 16 and the limit cover are lifted simultaneously, and the sediment is taken out of the cavity for treatment.

[0045] D. The wastewater filtered by treatment tank 1 enters the equalization tank through a pipeline. The pH adjustment device in the equalization tank stabilizes the pH value of the wastewater at 6-9, and the water temperature adjustment device controls the water temperature at 20-30℃, creating suitable reaction conditions for the subsequent biological treatment process.

[0046] E. After pH and temperature adjustment, the wastewater enters the reaction tank from the outlet of the equalization tank. The aeration device in the reaction tank provides aeration and oxygen supply, and the stirring device mixes the wastewater. Through aeration, oxygen supply and mixing, the efficiency of biological reaction is enhanced, and the wastewater is deeply purified.

[0047] F. After purification in the reaction tank, the water enters the storage tank. The water quality monitoring sensor at the outlet of the storage tank monitors the pH value, turbidity, COD and other indicators of the recycled water in real time. When the monitoring indicators meet the recycled water standards, the water can be reused. When the monitoring indicators do not meet the recycled water standards, the water is returned to the equalization tank for reprocessing, forming a circulating purification mechanism.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations 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 circulating purification system for wastewater produced by fermentation of stink catfish, comprising a treatment tank (1), characterized in that: The processing pool (1) has an upward opening cavity, a partition plate (10) is fixedly installed in the cavity of the processing pool (1), the partition plate (10) divides the cavity into two parts, a microfiltration membrane (11) is coaxially and fixedly installed on the surface of the partition plate (10), a rotating shaft (12) is rotatably connected to the surface of the processing pool (1), the rotating shaft (12) coaxially and movably penetrates the microfiltration membrane (11), a shearing blade (13) is coaxially and fixedly connected to the surface of the rotating shaft (12), there is a gap between the shearing blade (13) and the microfiltration membrane (11), the shearing force generated by the rotation of the shearing blade (13) can strip the colloidal particles adhered to the surface of the microfiltration membrane (11), a centrifugal flapper (14) is coaxially and fixedly connected to the surface of the rotating shaft (12), the centrifugal flapper (14) and the shearing blade (13) are located in the upper part of the cavity of the processing pool (1), a sedimentation groove (15) is formed in the cavity of the processing pool (1), the sedimentation groove (15) is used for receiving the sediment falling along the gravity after being separated by the centrifugal flapper (14), and a liquid outlet pipe (24) is installed at the bottom end of the processing pool (1) and communicates with the cavity. A receiving disc (16) is arranged on the bottom wall of the sedimentation groove (15), a second screw rod (18) is rotatably connected to the surface of the receiving disc (16), the bottom end of the second screw rod (18) movably penetrates the receiving disc (16) and is coaxially and fixedly connected with a supporting block (17), and a limiting cover capable of sliding up and down is arranged on the surface of the second screw rod (18), and the width of the limiting cover is consistent with that of the receiving disc (16). The limiting cover comprises a compression pressing plate (19) and a wall plate (22), the compression pressing plate (19) is arranged between the inner walls of the wall plate (22), the surface of the second screw rod (18) movably penetrates the compression pressing plate (19), and the second screw rod (18) is threadedly connected with the compression pressing plate (19). The compression pressing plate (19) is slidably connected with the inner walls of the wall plate (22), T-shaped sliding blocks (20) are fixedly connected to the side surface of the compression pressing plate (19), T-shaped sliding grooves (21) are formed in the inner walls of the wall plate (22) and are used for allowing the T-shaped sliding blocks (20) to slide up and down, and through holes are formed in the surface of the compression pressing plate (19) and are used for mounting filter membranes with the same specifications as the microfiltration membrane (11).

2. The system according to claim 1, wherein the system is characterized in that, The second screw rod (18) is driven by a motor assembly, the motor assembly comprises a driving motor (23) and a mounting bracket (25), one end of the mounting bracket (25) is fixedly connected with the driving motor (23), the other end is detachably connected with the processing pool (1), and the output end of the driving motor (23) is coaxially and fixedly connected with the top end of the second screw rod (18).

3. The system according to claim 1, wherein the system is characterized in that, A cleaning table (2) is mounted above the processing pool (1) through a support, a connecting seat (3) is mounted at the front end of the cleaning table (2), a clamping assembly is rotatably connected to the front end of the connecting seat (3), a flow guide opening (9) is formed in the bottom end of the cleaning table (2), and waste water generated in the cleaning process flows into the processing pool (1) through the flow guide opening (9).

4. The system according to claim 3, wherein the system further comprises a waste water recycling and purifying system for the production of fermented stinky carp. The clamping assembly comprises a square frame (5) and two symmetrically arranged clamping sliding sleeves (7), the two clamping sliding sleeves (7) are in sliding connection with the square frame (5), each of the two clamping sliding sleeves (7) is fixedly connected with a clamping jaw (8), the two clamping jaws (8) are symmetrically arranged, and the two clamping jaws (8) are relatively moved to clamp the to-be-cleaned pot.

5. A method for purifying waste water produced in the fermentation of stink catfish, characterized by, The specific steps are as follows: A, after the wastewater enters the cavity of the treatment tank (1), the driving rotating shaft (12) is rotated, and then the centrifugal flapper (14) and the shearing blade (13) are rotated, the centrifugal force generated by the rotation of the centrifugal flapper (14) throws the sub-micron colloidal particles to the inner wall of the treatment tank (1), and the formed sediment falls into the sediment tank (15) along the gravity, and the shearing force generated by the rotation of the shearing blade (13) peels off the colloidal particles attached to the surface of the microfiltration membrane (11); B, slide the limiting cover downward to cover the upper surface of the receiving disc (16), so as to seal the sediment, at this time, pull the second screw rod (18) upward to lift the receiving disc (16) and the limiting cover, and take out the whole sediment from the cavity.

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