Livestock breeding wastewater treatment device and method
By combining a floating defoaming structure and folded aeration components in the livestock breeding wastewater treatment device, on-demand aeration and simultaneous defoaming are achieved, solving the problems of inflexible aeration control and poor defoaming effect in traditional equipment, and improving treatment efficiency and equipment stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANYIN COUNTY XINGLONG DAIRY BREEDING PROFESSIONAL COOP
- Filing Date
- 2026-06-12
- Publication Date
- 2026-07-14
AI Technical Summary
Existing livestock wastewater treatment equipment suffers from problems such as the aeration system failing to automatically match the aeration pipeline according to the real-time water inflow, resulting in high or insufficient energy consumption, and the inability of aeration and defoaming to work in tandem, leading to poor defoaming effect.
A livestock breeding wastewater treatment device was designed, which combines a floating defoaming structure with a folded aeration component. The aeration volume and defoaming are dynamically matched by driving the rotating shaft. The defoaming operation is completed simultaneously by mechanical defoaming, avoiding the use of chemical defoamers.
It achieves automatic adjustment of aeration volume based on wastewater volume, reducing energy consumption, improving defoaming efficiency, enhancing gas-liquid mixing effect, extending equipment life, and avoiding the impact of chemical agents on biochemical bacteria and membrane fouling.
Smart Images
Figure CN122380554A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of wastewater treatment technology, specifically to a device and method for treating livestock breeding wastewater. Background Technology
[0002] With the rapid development of large-scale and intensive livestock and poultry farming, the discharge of livestock and poultry wastewater continues to rise. This type of wastewater is composed of a mixture of livestock and poultry excrement, residual feed, and washing wastewater. It has typical characteristics such as high suspended solids content, high concentrations of non-protein nitrogen and ammonia nitrogen, complex organic composition, and large fluctuations in water quality and quantity. The large amount of surface-active substances such as proteins, polysaccharides, and fatty acids in the wastewater can easily generate a large amount of stable foam during the aerobic aeration treatment stage. This foam can easily overflow the tank, causing on-site environmental pollution and sludge loss. It can also block atmospheric reoxygenation, disrupt the dissolved oxygen balance in the tank, inhibit the activity of aerobic microorganisms, and significantly reduce the degradation efficiency of pollutants such as COD and ammonia nitrogen. At the same time, the fine flocs carried by the foam can also aggravate the clogging and loss of subsequent membrane treatment units. Currently, several patents related to livestock wastewater treatment equipment have been published in China, such as patents CN112047458A, CN114262063A, and CN220131933U, which propose corresponding wastewater treatment, aeration, and defoaming solutions. However, these existing devices generally suffer from common defects: the aeration system mostly adopts a fixed operation mode, which cannot automatically match and deploy an appropriate number of aeration pipelines according to the real-time influent flow, easily leading to problems such as excessive aeration resulting in high energy consumption or insufficient aeration causing substandard treatment; at the same time, the aeration mechanism and the defoaming mechanism are independent of each other, making it difficult to achieve synchronous operation, failing to suppress foam generation at the source, and exhibiting poor stability in defoaming effect, making it difficult to adapt to the actual operating conditions of variable water volume and high foaming in livestock farms. Therefore, a livestock wastewater treatment device and method are proposed, which can automatically select and deploy the corresponding number of aeration pipelines according to the influent flow rate, achieving on-demand aeration and energy-saving operation, and can complete the defoaming operation simultaneously with the aeration operation, effectively solving the problems of inflexible aeration control, lack of coordination between aeration and defoaming, and poor foam control effect of traditional equipment. Summary of the Invention
[0003] To address the problems in existing technologies, this invention provides a livestock breeding wastewater treatment device and method that can automatically select and deploy the corresponding number of aeration pipelines based on the influent flow rate, achieving on-demand aeration and energy-saving operation. Furthermore, it can simultaneously perform defoaming operations during aeration, effectively solving problems such as inflexible aeration control, lack of coordination between aeration and defoaming, and poor foam control in traditional equipment.
[0004] The technical solution adopted by this invention to solve its technical problem is a livestock breeding wastewater treatment device, including a shell, an aeration reaction tank in the middle of the inner side of the shell, a raw liquid conditioning tank and an MBR membrane filtration tank on both sides of the aeration reaction tank, and an overflow pipe connecting the raw liquid conditioning tank and the aeration reaction tank; a drive shaft is vertically installed inside the aeration reaction tank, and a through air inlet channel is opened inside the drive shaft. Multiple sets of horizontally arranged fixed aeration pipes are fixedly connected to the lower end of the drive shaft, and the fixed aeration pipes are connected to the air inlet channel; several sets of folding aeration components are hinged on the drive shaft, and a floating defoaming structure that rises and falls with the liquid level is slidably sleeved on the drive shaft. The floating defoaming structure is in transmission cooperation with the folding aeration components. When the liquid level rises, the floating defoaming structure floats upward with the liquid surface and drives the corresponding folding aeration components to swing and unfold. After unfolding, the folding aeration components are connected to the air inlet channel.
[0005] Specifically, the folding aeration assembly includes a folding aeration pipe. The outer wall of the drive shaft has several sets of storage slots that cooperate with the folding aeration pipe. Both sides of the storage slots are provided with gear mounting slots. The upper ends of the folding aeration pipe are fixedly connected to hinge shafts on both sides. The ends of the hinge shafts pass through the gear mounting slots and are connected to driven gears. The driven gears are driven by the floating defoaming structure through transmission components. The upper end face of the folding aeration pipe is provided with a connecting joint. The top of the inner side of the storage slot is fixed with an elastic docking nozzle that communicates with the air inlet channel. When the folding aeration pipe swings to a horizontal state, the elastic docking nozzle docks with the connecting joint.
[0006] Specifically, the floating defoaming structure includes a sleeve that is slidably sleeved on the outside of the drive shaft; a limiting groove is opened on the outer wall of the drive shaft, and a limiting slider that slides in cooperation with the limiting groove is provided on the inner side of the sleeve; multiple defoaming rods are fixed circumferentially on the outer side of the sleeve, and a floating ring is provided below the defoaming rods, with a first spring fixedly connected between the floating ring and the end of the defoaming rod.
[0007] Specifically, the transmission components include a sliding rack fixedly connected to both sides of the limiting slider, and a drive gear rotatably connected in the gear mounting slot. The drive gear meshes with the driven gear for transmission, and the drive gear is located on the moving path of the sliding rack.
[0008] Specifically, a drive motor is fixedly installed at the top of the housing, the upper end of the drive shaft passes through the housing and is rotatably connected to the housing, and the output shaft of the drive motor is fixedly connected to the upper end of the drive shaft; a second spring is vertically arranged inside the limiting slide groove, the upper end of the second spring is fixedly connected to the top wall of the limiting slide groove, and the lower end of the second spring is fixedly connected to the upper surface of the limiting slider.
[0009] Specifically, a rotating collar is rotatably mounted on the outer side of the upper end of the drive shaft, and an external connector is provided on the outer side of the rotating collar for connecting to an external air supply device; the inner cavity of the rotating collar is connected to the air intake channel inside the drive shaft.
[0010] Specifically, a drain pipe is installed on the wall of the MBR membrane filtration tank. One end of the drain pipe is connected to the inside of the MBR membrane filtration tank, and the other end extends outward to the outside of the shell.
[0011] A method for treating livestock breeding wastewater, using the aforementioned livestock breeding wastewater treatment device, includes the following steps: S1: Livestock breeding wastewater first enters the raw liquid conditioning tank inside the shell for temporary storage. After the liquid level rises, the wastewater flows into the aeration reaction tank through the overflow pipe. S2: Drive the rotating shaft to rotate, drive the aeration pipe at the lower end of the rotating shaft to continuously ventilate and aerate, and at the same time, the floating defoaming structure rises and falls synchronously with the liquid level inside the aeration reaction tank. S3: During the liquid level rise, the floating defoaming structure drives the corresponding folding aeration component to swing and unfold. After unfolding, the folding aeration component is connected to the air intake channel in the drive shaft, increasing the aeration points and aeration volume. S4: The floating defoaming structure rotates synchronously with the drive shaft to perform real-time defoaming of the foam generated during the aeration process. S5: After aeration and defoaming treatment, the wastewater continues to flow into the MBR membrane filtration tank, and is discharged after completing precision filtration.
[0012] The beneficial effects of this invention are: (1) The livestock breeding wastewater treatment device and method of the present invention can automatically expand or retract the aeration components according to the real-time liquid level in the aeration reaction tank, realize the adaptive matching between the aeration volume and the wastewater treatment load, abandon the traditional fixed aeration mode, effectively reduce the energy consumption of equipment operation, and at the same time ensure the aeration effect under different water volume conditions, adapting to the characteristics of large day and night fluctuations in the water volume of livestock breeding wastewater.
[0013] (2) The livestock breeding wastewater treatment device and method of the present invention can dynamically adjust the working position of the defoaming component according to the liquid level, eliminating the blind spot of the fixed defoaming equipment; at the same time, relying on the second spring and the first spring to form a double elastic adjustment structure, when the liquid level is higher, the aeration volume is greater, and the amount of foam is more, the depth of the defoaming rod immersed in the foam layer increases synchronously, automatically strengthening the defoaming ability, and can effectively suppress foam accumulation and overflow.
[0014] (3) The livestock breeding wastewater treatment device and method of the present invention, the whole set of aeration components rotates synchronously with the drive shaft. Compared with the traditional static aeration structure, it can enhance the gas-liquid two-phase mixing effect, improve oxygen utilization and pollutant degradation efficiency, and reduce sludge and impurities adhering and clogging at the aeration port, thereby improving the stability and service life of the equipment. At the same time, through mechanical physical defoaming, there is no need to add chemical defoamers, which avoids the problem of agents inhibiting the activity of biochemical bacteria and reducing wastewater treatment efficiency, and also prevents agents from entering the downstream MBR membrane unit and causing membrane fouling, thus extending the service life of the membrane components and reducing operation and maintenance costs. Attached Figure Description
[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0016] Figure 1 This is an isometric view of the present invention; Figure 2 This is a schematic cross-sectional view of the housing structure of the present invention; Figure 3 This is a schematic diagram of the drive shaft connection structure of the present invention; Figure 4 for Figure 3 Enlarged view of region A in the image; Figure 5 This is a schematic diagram of the cross-sectional structure of the sleeve of the present invention; Figure 6 This is a schematic diagram of the meshing transmission structure of the driven gear and the driving gear of the present invention; Figure 7 This is a partial structural diagram of the drive shaft of the present invention; Figure 8 This is a schematic cross-sectional view of the drive shaft structure of the present invention; In the diagram: 1. Shell; 2. Aeration reaction tank; 3. Raw liquid conditioning tank; 4. MBR membrane filter tank; 5. Overflow pipe; 6. Drive shaft; 7. Air inlet channel; 8. Fixed aeration pipe; 9. Folded aeration pipe; 10. Collection tank; 11. Gear mounting slot; 12. Hinge shaft; 13. Driven gear; 14. Connecting joint; 15. Flexible connecting nozzle; 16. Sleeve; 17. Limiting slide groove; 18. Limiting slider; 19. Defoaming rod; 20. Floating ring; 21. First spring; 22. Sliding rack; 23. Drive gear; 24. Drive motor; 25. Second spring; 26. Rotating collar; 27. External connector; 28. Drain pipe. Detailed Implementation
[0017] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.
[0018] To automatically select and deploy the corresponding number of aeration pipes based on the influent flow rate, achieving on-demand aeration and energy-saving operation, and to simultaneously complete defoaming operations during aeration, as an embodiment of the present invention, such as... Figure 1 , Figure 2 , Figure 3 As shown, the livestock wastewater treatment device of the present invention includes a shell 1, an aeration reaction tank 2 located in the middle of the inner side of the shell 1, a raw liquid conditioning tank 3 and an MBR membrane filter tank 4 on both sides of the aeration reaction tank 2, and an overflow pipe 5 connecting the raw liquid conditioning tank 3 and the aeration reaction tank 2; a drive shaft 6 is vertically installed inside the aeration reaction tank 2, and an air inlet channel 7 is opened inside the drive shaft 6; multiple sets of horizontally arranged fixed aeration pipes 8 are fixedly connected to the lower end of the drive shaft 6, and the fixed aeration pipes 8 are connected to the air inlet channel 7; several sets of folding aeration components are hinged on the drive shaft 6, and a floating defoaming structure that rises and falls with the liquid level is slidably sleeved on the drive shaft 6. The floating defoaming structure is in transmission cooperation with the folding aeration components. When the liquid level rises, the floating defoaming structure floats upward with the liquid surface and drives the corresponding folding aeration components to swing and unfold. After unfolding, the folding aeration components are connected to the air inlet channel 7.
[0019] When in use, livestock breeding wastewater is first passed into the original liquid conditioning tank 3 inside the shell 1 for temporary storage, homogenization and equalization, which alleviates the problem of large fluctuations in the amount and quality of livestock breeding wastewater from day to night. After the liquid level in the tank gradually rises, the wastewater flows into the aeration reaction tank 2 by gravity through the connected overflow pipe 5 to complete the process flow. After the equipment is started, the drive shaft 6 rotates, the air intake channel 7 continuously supplies air, and the fixed aeration pipe 8 simultaneously carries out aeration operations to aerobically degrade pollutants such as organic matter and ammonia nitrogen in the wastewater. The aquaculture wastewater is rich in surface-active substances such as proteins and fatty acids, and a large amount of stable foam will be continuously generated during the aeration process. As the influent continues to flow in, the liquid level in the aeration reaction tank 2 rises continuously, and the floating defoaming structure floats up synchronously with the liquid surface. During the floating defoaming structure's upward movement, the folding aeration components are driven to swing outward and unfold step by step. The unfolded aeration components are connected to the air intake channel 7, automatically increasing the aeration points and the total aeration volume. During the day, when aquaculture operations are concentrated, wastewater discharge is large, and the liquid level in the pond is high, more aeration components can be automatically turned on to match the high-load treatment needs. At night, when wastewater discharge decreases and the liquid level drops, the folding aeration components are retracted, leaving only the bottom fixed aeration pipe 8 in operation, achieving aeration on demand and effectively avoiding the defects of excessive energy consumption or insufficient oxygen supply in constant aeration mode. Meanwhile, the floating defoaming structure always moves with the liquid level and can fit the foam layer throughout the process to suppress foam diffusion. The floating defoaming structure rotates synchronously with the drive shaft 6 and breaks the foam generated by aeration in real time by mechanical shearing and impact. It uses physical defoaming method to avoid many drawbacks of adding chemical defoamers. After aeration and defoaming, the wastewater flows by gravity into the MBR membrane filtration tank 4, where the membrane module performs precision filtration, intercepting the remaining suspended solids, colloids and other impurities in the water. Finally, the purified water is discharged. The entire purification process operates continuously and automatically.
[0020] To automatically match the wastewater treatment load and avoid energy waste caused by traditional equipment aeration at full load throughout the entire process, for example, such as Figure 3 , Figure 6 , Figure 7 , Figure 8 As shown, the present invention also includes a folding aeration assembly comprising a folding aeration pipe 9, and a plurality of sets of receiving grooves 10 that cooperate with the folding aeration pipe 9 on the outer wall of the drive shaft 6. Gear mounting grooves 11 are provided on both sides of the receiving grooves 10. Hinges 12 are fixedly connected to both sides of the upper end of the folding aeration pipe 9. The ends of the hinges 12 pass through the gear mounting grooves 11 and are connected to driven gears 13. The driven gears 13 are driven by the floating defoaming structure through a transmission component. A connecting joint 14 is provided on the upper end face of the folding aeration pipe 9. An elastic docking nozzle 15 that communicates with the air inlet channel 7 is fixed on the top of the inner side of the receiving groove 10. When the folding aeration pipe 9 swings to a horizontal state, the elastic docking nozzle 15 docks with the connecting joint 14.
[0021] During use, as the liquid level in the aeration reaction tank 2 gradually rises, the floating defoaming structure moves upward synchronously with the liquid surface. During the movement, it meshes with the driven gear 13 through the transmission component. The transmission component drives the driven gear 13 to rotate, which in turn drives the hinge shaft 12 to rotate synchronously. The hinge shaft 12 drives the folded aeration pipe 9 to swing outward until it swings to a horizontal working state. At this time, the elastic docking nozzle 15 docks with the connecting connector 14 on the folded aeration pipe 9, and the gas in the air inlet channel 7 inside the driving shaft 6 is smoothly introduced into the folded aeration pipe 9. The newly added aeration point participates in the water aeration operation. The aeration components can be automatically put into operation according to the liquid level. The higher the liquid level, the more folded aeration pipes 9 are put into operation, automatically matching the wastewater treatment load and avoiding the energy waste caused by the full-load aeration of traditional equipment. When the liquid level in the aeration reaction tank 2 drops, the floating defoaming structure moves down synchronously with the liquid level. The transmission component drives the driven gear 13 and the hinge shaft 12 to rotate in the opposite direction, causing the folded aeration pipe 9 to swing in the opposite direction and retract into the receiving tank 10. The side wall of the folded aeration pipe 9 will squeeze the elastic docking nozzle 15, causing the elastic docking nozzle 15 to separate from the connecting joint 14 and be compacted and sealed, blocking the air path and stopping the air supply. This avoids the problem of continuous air leakage and ineffective aeration after the air path is separated, further reducing energy consumption. Under low liquid level conditions, only the basic aeration unit is kept working, further reducing the energy consumption caused by ineffective aeration. At the same time, the receiving tank 10 can protect the retracted components, reducing water debris scouring and collision damage, and extending the service life of the components. Meanwhile, both the fixed aeration pipe 8 and the folded aeration pipe 9 rotate synchronously with the drive shaft 6. Compared with the traditional static aeration pipes, the rotating aeration can continuously stir the water, expand the contact range between the gas and the sewage, improve the oxygen utilization rate, and enhance the degradation effect on organic matter and ammonia nitrogen. At the same time, the rotating airflow can reduce the adhesion and blockage of sludge and impurities at the pipe opening, and improve the stability of equipment operation.
[0022] To improve defoaming efficiency, for example, such as Figure 3 , Figure 4 , Figure 5 As shown, the present invention also includes a floating defoaming structure comprising a sleeve 16 slidably sleeved on the outside of the drive shaft 6; a limiting groove 17 is provided on the outer wall of the drive shaft 6, and a limiting slider 18 is provided on the inner side of the sleeve 16 to slide in cooperation with the limiting groove 17; multiple defoaming rods 19 are fixed circumferentially on the outer side of the sleeve 16, and a floating ring 20 is provided below the defoaming rods 19, and a first spring 21 is fixedly connected between the floating ring 20 and the end of the defoaming rod 19.
[0023] When in use, as the liquid level in the aeration reaction tank 2 rises, the floating ring 20 moves upward due to the buoyancy of the water. This movement is simultaneously driven by the first spring 21 to lift multiple defoaming rods 19, which in turn drives the sleeve 16 to slide upward along the outside of the drive shaft 6. The higher the liquid level, the greater the upward stroke of the floating ring 20, and the lifting height of the sleeve 16 and the defoaming rods 19 increases synchronously. This allows for dynamic adjustment of the working height based on the liquid level and the position of the foam layer, avoiding the blind spots present in traditional fixed defoaming structures. The limiting slider 18 on the inner side of the sleeve 16 cooperates with the limiting groove 17 on the outer wall of the drive shaft 6 to ensure that the sleeve 16 can slide smoothly up and down along the drive shaft 6, and to form a circumferential limit on the sleeve 16. This ensures that when the drive shaft 6 is running, it can stably drive the sleeve 16 and the defoaming rod 19 to rotate synchronously. The defoaming rod 19 rotates continuously with the shaft and relies on the impact and shearing force generated by the rotation to quickly break up the foam on the liquid surface, resulting in a wider defoaming coverage and higher defoaming efficiency. When the liquid level in the aeration reaction tank 2 drops, the buoyancy of the floating ring 20 decreases. Under the action of its own weight and the pulling force of the first spring 21, it drives the defoaming rod 19 and the sleeve 16 to reset downwards and return to the low-position working state. The structure resets smoothly and can adapt to the working conditions of repeated fluctuations in liquid level.
[0024] To facilitate driving the folded aeration pipe 9 to complete the swinging motion, for example, as shown... Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the present invention also includes a transmission component comprising a sliding rack 22 fixedly connected to both sides of the limiting slider 18, and a drive gear 23 rotatably connected in the gear mounting groove 11. The drive gear 23 meshes with the driven gear 13 for transmission, and the drive gear 23 is located on the movement path of the sliding rack 22.
[0025] During use, when the floating defoaming structure moves the sleeve 16 as the liquid level rises and falls, the sliding racks 22 on both sides of the limiting slider 18 move upward synchronously. When the sliding racks 22 move to a certain position, they mesh with the drive gear 23, driving the drive gear 23 to rotate. The rotation of the drive gear 23 drives the hinge shaft 12 and the folded aeration pipe 9 to complete the swinging action, which can ensure that the liquid level change and the start and stop of the aeration pipe are synchronized in real time. No additional transmission components are required, the structure is simple and reliable, and the pure mechanical transmission is not affected by water quality or humid environment. Compared with the electric control transmission, it has stronger anti-interference ability, is suitable for the complex operating conditions of aquaculture wastewater, and greatly reduces the probability of failure and the workload of later operation and maintenance.
[0026] To achieve adaptive adjustment of defoaming strength, for example, such as Figure 1 , Figure 3 , Figure 4 As shown, the present invention also includes a drive motor 24 fixedly installed at the top of the housing 1, the upper end of the drive shaft 6 passing through the housing 1 and rotatably connected to the housing 1, and the output shaft of the drive motor 24 fixedly connected to the upper end of the drive shaft 6; a second spring 25 is vertically arranged inside the limiting slide groove 17, the upper end of the second spring 25 is fixedly connected to the top wall of the limiting slide groove 17, and the lower end of the second spring 25 is fixedly connected to the upper surface of the limiting slider 18.
[0027] When the equipment is in use, the output shaft of the drive motor 24 drives the drive shaft 6 to rotate continuously, providing unified rotational power for the entire aeration assembly and floating defoaming structure, which can ensure that rotational aeration and mechanical defoaming are carried out synchronously and continuously. As the liquid level in the aeration reaction tank 2 gradually rises, the floating ring 20 is driven by buoyancy to move the sleeve 16 and the limiting slider 18 upward together. During the upward movement, the limiting slider 18 continuously squeezes the second spring 25 in the limiting groove 17, causing the second spring 25 to continuously compress and store energy, and generating a gradually increasing reverse resistance. The higher the liquid level, the greater the compression of the second spring 25, and the greater the overall upward resistance of the sleeve 16, effectively limiting the floating defoaming structure from floating upward without restriction with buoyancy. As the liquid level rises, more folded aeration pipes 9 will be opened in stages, increasing the overall aeration volume and intensifying water agitation. As a result, the foam in the pool increases significantly. Due to the resistance of the second spring 25, the sleeve 16 cannot float freely with the liquid surface. At this time, the buoyancy will further compress the floating ring 20, causing the floating ring 20 to compress the first spring 21 upward. After the first spring 21 is compressed, the defoaming rod 19 sinks relatively and cuts deeper into the foam layer, greatly increasing the contact area between the defoaming rod 19 and the foam. This enhances the effect of mechanical shearing and impact defoaming, achieving adaptive adjustment that automatically increases the defoaming intensity as the more foam there is. This specifically solves the problem of foam accumulation and poor defoaming effect under high aeration conditions. When the liquid level in the aeration reaction tank 2 drops, the overall aeration volume decreases accordingly, and the amount of foam generated decreases simultaneously. The second spring 25 releases its elastic potential energy, pushing the limit slider 18 and the sleeve 16 to reset downwards. At the same time, the first spring 21 rebounds, the floating ring 20 resets, and the defoaming rod 19 rises back to its normal working position, reducing excessive agitation of the water and avoiding the generation of secondary foam. The entire structure can reciprocate stably with the repeated fluctuations of the liquid level, without the need for manual adjustment throughout the process.
[0028] For example, such as Figure 3 As shown, the present invention also includes a rotating collar 26 rotatably mounted on the outer side of the upper end of the drive shaft 6, and an external connector 27 provided on the outer side of the rotating collar 26 for connecting to an external air supply device; the inner cavity of the rotating collar 26 is connected to the air intake channel 7 inside the drive shaft 6.
[0029] In use, the external air supply device is connected to the air source through the external connector 27 on the outside of the rotating collar 26. The gas is introduced into the air intake channel 7 of the drive shaft 6 through the internal cavity of the rotating collar 26 to complete the continuous air supply. The rotating collar 26 is rotatably mounted on the outer side of the upper end of the drive shaft 6. When the drive shaft 6 is continuously rotating, the rotating collar 26 remains stationary, which can prevent the air supply pipeline from twisting and tangling synchronously with the shaft, thus ensuring the safety of the air supply pipeline.
[0030] For example, such as Figure 1 , Figure 2 As shown, the present invention also includes a drain pipe 28 connected to the wall of the MBR membrane filter tank 4, one end of the drain pipe 28 being connected to the inside of the MBR membrane filter tank 4, and the other end extending outward to the outside of the shell 1.
[0031] During use, wastewater undergoes aeration degradation and defoaming treatment before flowing by gravity into the MBR membrane filtration tank 4. The membrane module performs deep interception and filtration of residual suspended solids and colloidal impurities in the water, further purifying the water quality. The clean water after filtration is discharged to the outside through the drain pipe 28 connected to the tank wall.
[0032] A method for treating livestock breeding wastewater, using the aforementioned livestock breeding wastewater treatment device, includes the following steps: S1: Livestock breeding wastewater first enters the raw liquid conditioning tank 3 inside the shell 1 for temporary storage. After the liquid level rises, the wastewater flows into the aeration reaction tank 2 through the overflow pipe 5. S2: Drive the rotating shaft 6 to rotate, drive the aeration pipe at the lower end of the rotating shaft 6 to continuously ventilate and aerate, and at the same time, the floating defoaming structure rises and falls synchronously with the liquid level inside the aeration reaction tank 2. S3: During the liquid level rise, the floating defoaming structure drives the corresponding folding aeration component to swing and unfold. After unfolding, the folding aeration component is connected to the air inlet channel 7 in the drive shaft 6, increasing the aeration points and aeration volume. S4: The floating defoaming structure rotates synchronously with the drive shaft 6 to perform real-time defoaming of the foam generated during the aeration process. S5: After aeration and defoaming treatment, the wastewater continues to flow into the MBR membrane filtration tank 4, and is discharged after completing precision filtration.
[0033] When this invention is in use, livestock breeding wastewater is first passed into the original liquid conditioning tank 3 inside the shell 1 for temporary storage, homogenization and equalization, which effectively alleviates the problem of large fluctuations in the amount and quality of livestock breeding wastewater between day and night. After the liquid level in the original liquid conditioning tank 3 gradually rises, the wastewater flows into the aeration reaction tank 2 by gravity through the connected overflow pipe 5, completing the wastewater process flow. The drive motor 24 at the top of the housing 1 starts, and the output shaft of the drive motor 24 drives the drive shaft 6 to rotate continuously, providing unified rotational power for the entire aeration assembly and floating defoaming structure, ensuring that rotational aeration and mechanical defoaming are carried out synchronously and continuously; the external air supply equipment is connected to the air source through the external connector 27 on the outside of the rotating collar 26 at the upper end of the drive shaft 6, and the gas is introduced into the air intake channel 7 that runs through the inside of the drive shaft 6 through the internal cavity of the rotating collar 26; the rotating collar 26 is rotatably mounted on the outside of the upper end of the drive shaft 6, and the rotating collar 26 remains stationary when the drive shaft 6 is rotating, which can prevent the air supply pipeline from twisting and tangling synchronously with the shaft, ensuring continuous air supply and reliable sealing; The gas in the air intake channel 7 is introduced into the fixed aeration pipe 8, which is horizontally arranged at the lower end of the drive shaft 6. The fixed aeration pipe 8 performs continuous aeration to aerobically degrade pollutants such as organic matter and ammonia nitrogen in the wastewater. The aquaculture wastewater is rich in surface-active substances such as proteins, polysaccharides, and fatty acids, which continuously generate a large amount of stable foam during the aeration process. As wastewater continues to flow in, the liquid level in the aeration reaction tank 2 continues to rise. The floating defoaming structure, which is slidably sleeved on the outside of the drive shaft 6, moves upward synchronously with the liquid level. The limiting slider 18 on the inside of the sleeve 16 slides upward along the limiting groove 17 on the outer wall of the drive shaft 6. The sliding racks 22 fixed on both sides of the limiting slider 18 move upward synchronously and mesh with the drive gear 23 inside the gear mounting groove 11. The drive gear 23 further drives the driven gear 13 to rotate. The driven gear 13 drives the folded aeration pipe 9 to swing outward from the collection tank 10 through the hinge shaft 12 until it swings to a horizontal state. At this time, the connecting joint 14 on the upper end of the folded aeration pipe 9 connects with the elastic docking nozzle 15 on the top of the inner side of the receiving tank 10, and the gas in the air inlet channel 7 is introduced into the folded aeration pipe 9, automatically increasing the aeration points and the total aeration volume; the folded aeration pipe 9 can be automatically used according to the liquid level. The higher the liquid level, the more aeration pipes are activated. During the daytime, when the discharge of aquaculture wastewater is large and the liquid level is high, it automatically matches the high treatment load, abandoning the traditional fixed aeration mode and effectively reducing the energy consumption of equipment operation; At the same time, both the fixed aeration pipe 8 and the folded aeration pipe 9 rotate synchronously with the drive shaft 6. Compared with the traditional static aeration structure, it can continuously stir the water, expand the gas-liquid contact range, improve oxygen utilization and pollutant degradation efficiency, and reduce sludge and impurities from adhering and clogging the aeration port, thereby improving the stability of equipment operation. During the upward movement, the limiting slider 18 continuously squeezes the second spring 25 vertically set inside the limiting groove 17. The second spring 25 continuously compresses and stores force and generates reverse resistance. The higher the liquid level, the greater the compression of the second spring 25, and the greater the overall upward resistance of the sleeve 16, effectively limiting the floating defoaming structure from floating upward without restriction with buoyancy. As the liquid level rises, the aeration rate increases, the water agitation intensifies, and the foam in the pool increases significantly. Due to the resistance of the second spring 25, the floating ring 20 is further compressed upward by the buoyancy of the water, thus compressing the first spring 21. After the first spring 21 is compressed, the defoaming rod 19 sinks relatively and cuts deeper into the foam layer, greatly increasing the contact area between the defoaming rod 19 and the foam. This enhances the defoaming effect of mechanical shearing and impact, achieving adaptive adjustment where the more foam there is, the stronger the defoaming intensity automatically increases, effectively solving the problem of foam accumulation and overflow under high aeration conditions. The limiting slider 18 and the limiting groove 17 on the inner side of the sleeve 16 cooperate with each other to achieve circumferential limiting while sliding up and down, ensuring that the drive shaft 6 can stably drive the sleeve 16 and the defoaming rod 19 to rotate synchronously when it is running. The defoaming rod 19 rotates, with a wide defoaming coverage and high operating efficiency. The mechanical physical defoaming method eliminates the need to add chemical defoamers, which avoids the problem of chemical agents inhibiting the activity of biological bacteria and reducing wastewater treatment efficiency. It also prevents the agents from entering the downstream membrane and causing pollution, thus extending the service life of the equipment. As the discharge of aquaculture wastewater decreases, the liquid level in the aeration reaction tank 2 gradually drops. The second spring 25 releases its elastic potential energy, pushing the limit slider 18 and the sleeve 16 downward as a whole. The sliding rack 22 moves downward simultaneously, driving the drive gear 23 and the driven gear 13 to rotate in the opposite direction, causing the folded aeration pipe 9 to swing in the opposite direction and retract into the receiving tank 10. The side wall of the folded aeration pipe 9 presses against the elastic connecting nozzle 15, causing the elastic connecting nozzle 15 to separate from the connecting joint 14 and be compacted and sealed, blocking the air path and stopping the air supply, eliminating the ineffective aeration caused by continuous air leakage after the air path is separated, and further saving energy. At the same time, the receiving tank 10 can protect the folded aeration pipe 9 after it is retracted, reducing the scouring and collision of water flow and debris, and extending the service life of the components. As the liquid level drops, the amount of foam generated decreases simultaneously. The first spring 21 rebounds, and the floating ring 20 and the defoaming rod 19 are lifted and reset, reducing excessive agitation of the water and avoiding the generation of secondary foam. The entire mechanism can repeatedly fluctuate with the liquid level and operate without manual adjustment throughout the process.
[0034] After aeration degradation and simultaneous defoaming treatment, the wastewater flows by gravity into the MBR membrane filter tank 4 on the other side of the aeration reaction tank 2. The membrane module performs deep interception and filtration of residual suspended solids and colloidal impurities in the water, further purifying the water quality. Finally, the purified water is discharged outward through the drain pipe 28 connected to the wall of the MBR membrane filter tank 4. The drain pipe 28 is reasonably laid out, and the water flow is smooth, ensuring the continuous closed-loop operation of the entire water treatment process.
[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.
Claims
1. A livestock breeding wastewater treatment device, characterized in that, The device includes a shell (1), an aeration reaction tank (2) is provided in the middle of the inner side of the shell (1), and the two sides of the aeration reaction tank (2) are a raw liquid conditioning tank (3) and an MBR membrane filter tank (4), respectively. An overflow pipe (5) is provided between the raw liquid conditioning tank (3) and the aeration reaction tank (2). A drive shaft (6) is vertically installed inside the aeration reaction tank (2). An air inlet channel (7) is opened inside the drive shaft (6). Multiple sets of horizontally arranged fixed aeration pipes (8) are fixedly connected to the lower end of the drive shaft (6). The fixed aeration pipes (8) are connected to the air inlet channel (7). Several sets of folding aeration components are hinged on the drive shaft (6). A floating defoaming structure that rises and falls with the liquid level is slidably sleeved on the drive shaft (6). The floating defoaming structure is driven and cooperates with the folding aeration components. When the liquid level rises, the floating defoaming structure floats upward with the liquid surface and drives the corresponding folding aeration components to swing and unfold. After unfolding, the folding aeration components are connected to the air inlet channel (7).
2. The livestock breeding wastewater treatment device according to claim 1, characterized in that, The folding aeration assembly includes a folding aeration pipe (9). The outer wall of the drive shaft (6) is provided with several sets of storage grooves (10) that cooperate with the folding aeration pipe (9). Both sides of the storage groove (10) are provided with gear mounting grooves (11). Both sides of the upper end of the folding aeration pipe (9) are fixedly connected with hinge shafts (12). The end of the hinge shaft (12) passes through the gear mounting groove (11) and is connected with a driven gear (13). The driven gear (13) is driven by the floating defoaming structure through the transmission component. The upper end face of the folding aeration pipe (9) is provided with a connecting joint (14). The top of the inner side of the storage groove (10) is fixed with an elastic docking nozzle (15) that communicates with the air inlet channel (7). When the folding aeration pipe (9) swings to the horizontal state, the elastic docking nozzle (15) docks with the connecting joint (14).
3. The livestock breeding wastewater treatment device according to claim 2, characterized in that, The floating defoaming structure includes a sleeve (16) that is slidably sleeved on the outside of the drive shaft (6); a limiting groove (17) is provided on the outer wall of the drive shaft (6), and a limiting slider (18) that slides with the limiting groove (17) is provided on the inner side of the sleeve (16); multiple defoaming rods (19) are fixed circumferentially on the outer side of the sleeve (16), and a floating ring (20) is provided below the defoaming rods (19). A first spring (21) is fixedly connected between the floating ring (20) and the end of the defoaming rod (19).
4. The livestock breeding wastewater treatment device according to claim 3, characterized in that, The transmission components include a sliding rack (22) fixedly connected to both sides of the limiting slider (18) and a drive gear (23) rotatably connected in the gear mounting groove (11). The drive gear (23) meshes with the driven gear (13) for transmission, and the drive gear (23) is located on the moving path of the sliding rack (22).
5. The livestock breeding wastewater treatment device according to claim 4, characterized in that, A drive motor (24) is fixedly installed at the top of the housing (1). The upper end of the drive shaft (6) passes through the housing (1) and is rotatably connected to the housing (1). The output shaft of the drive motor (24) is fixedly connected to the upper end of the drive shaft (6). A second spring (25) is vertically installed inside the limiting slide (17). The upper end of the second spring (25) is fixedly connected to the top wall of the limiting slide (17), and the lower end of the second spring (25) is fixedly connected to the upper surface of the limiting slider (18).
6. The livestock breeding wastewater treatment device according to claim 5, characterized in that, A rotating collar (26) is rotatably mounted on the outer side of the upper end of the drive shaft (6). An external connector (27) is provided on the outer side of the rotating collar (26). The external connector (27) is used to connect to an external air supply device. The inner cavity of the rotating collar (26) is connected to the air intake channel (7) inside the drive shaft (6).
7. The livestock breeding wastewater treatment device according to claim 6, characterized in that, The wall of the MBR membrane filter tank (4) is connected to a drain pipe (28). One end of the drain pipe (28) is connected to the inside of the MBR membrane filter tank (4), and the other end extends outward to the outside of the shell (1).
8. A method for treating livestock breeding wastewater according to claims 1-7, characterized in that, Includes the following steps; S1: Livestock breeding wastewater first enters the original liquid conditioning tank (3) inside the shell (1) for temporary storage. After the liquid level rises, the wastewater flows into the aeration reaction tank (2) through the overflow pipe (5). S2: Drive the rotating shaft (6) to rotate, drive the aeration pipe at the lower end of the rotating shaft (6) to continuously ventilate and aerate, and at the same time, the floating defoaming structure rises and falls synchronously with the liquid level inside the aeration reaction tank (2). S3: During the liquid level rise, the floating defoaming structure drives the corresponding folding aeration component to swing and unfold. After unfolding, the folding aeration component is connected to the air inlet channel (7) inside the drive shaft (6), increasing the aeration points and aeration volume. S4: The floating defoaming structure rotates synchronously with the drive shaft (6) to perform real-time defoaming of the foam generated during the aeration process; S5: After aeration and defoaming treatment, the wastewater continues to flow into the MBR membrane filtration tank (4) and is discharged after precision filtration.