Modified biomass charcoal-based eutrophication water treatment device for livestock and poultry breeding

Abstract

This invention relates to the field of water treatment technology, specifically a water treatment device for eutrophic livestock and poultry farming based on modified biochar. It includes a square treatment box, within which a purification box is supported. A filter plate is installed in the upper cavity of the purification box, and multiple purification components are installed in the lower cavity. A bottom outlet is located at the bottom of the purification box. An inlet pipe and a return pipe are connected to the other side of a collection tank. The other end of the inlet pipe connects to the purification box, and the other end of the return pipe extends into the square treatment box and connects to a connecting pipe. The bottom outlet is connected to the return pipe. The invention also includes a water quality monitoring component for monitoring the water discharged from the purification box. This invention pre-filters the water before it enters the purification box and specifically treats eutrophic livestock and poultry farming water by using modified biochar materials to optimize the treatment and improve the nitrogen and phosphorus treatment performance of the water.

Description

Technical Field

[0001] This invention belongs to the field of water treatment technology, and particularly relates to a water treatment device for eutrophic livestock and poultry farming based on modified biochar. Background Technology

[0002] With the rapid development of the livestock and poultry farming industry, problems in farms and their surrounding environment have become increasingly prominent, becoming one of the main factors restricting the further development of animal husbandry.

[0003] Untreated livestock and poultry excrement, carried by surface runoff (such as rainwater runoff during rainy days), enters ditches and eventually flows into rivers and lakes. This leads to excessive levels of nitrogen and phosphorus in the water, hyperoxidation, and the proliferation of organic matter, polluting the water, causing mass mortality of aquatic organisms, and disrupting the balance of the aquatic ecosystem. Based on treatment principles, treatment measures can generally be divided into three categories: physical, chemical, and biological measures. Chemical treatments can cause irreversible damage to the original ecosystem; while biological measures have a short purification cycle, the loss of beneficial microorganisms is rapid and they lack ideal resilience to environmental shocks. Currently, the main problems with physical water purification technologies are poor adsorption and lack of pretreatment. Summary of the Invention

[0004] The purpose of this invention is to provide a water treatment device for eutrophic livestock and poultry farming based on modified biochar, aiming to solve the problem that existing livestock and poultry farming wastewater treatment processes have poor treatment effects on aquaculture water.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] This invention provides a water treatment device for eutrophic livestock and poultry farming based on modified biochar, comprising: A square processing box, with a purification chamber supported inside; a filter plate is installed in the upper inner cavity of the purification chamber, and multiple purification components are installed in the lower inner cavity of the purification chamber; a bottom outlet is provided at the bottom of the purification chamber. A water collection tank is provided with a water collection pipe on one side; an inlet pipe and a return pipe are respectively connected to the other side of the water collection tank; the other end of the inlet pipe is connected to a purification tank installed inside the square treatment box, and the other end of the return pipe extends into the square treatment box, and the return pipe inside the square treatment box is located below the purification tank, and the other end of the return pipe is connected to a connecting pipe; the bottom outlet is connected to the return pipe, and the water discharged from the purification box enters the return pipe. The water quality monitoring component is used to monitor the water discharged from the purification tank. The water quality monitoring component is installed in the bottom inner cavity of the square treatment tank.

[0007] Furthermore, a cleaning rod assembly is vertically fixed inside the water collection tank. The cleaning rod assembly divides the inside of the water collection tank into a first chamber and a second chamber. The cleaning rod assembly is located on the filter surface of the movable filter plate. When the movable filter plate undergoes a vertical position change, the cleaning rod assembly cleans the filter surface of the movable filter plate. The cleaning rod assembly includes an upper support plate, with several lower support rods evenly spaced at the lower end of the upper support plate. Each lower support rod is equipped with several cleaning rods, and the cleaning rods on adjacent lower support rods are staggered vertically. When the movable filter plate changes its vertical position, the cleaning rods can clean the filter surface of the movable filter plate of the attached filter residue. The staggered cleaning rods can make the cleaning range of the filter surface wider. That is to say, the vertical rectangular area of ​​the movable filter plate between two adjacent lower support rods can be completely cleaned.

[0008] Furthermore, the vertical position change of the movable filter plate is driven by an eccentric wheel mechanism; Eccentric wheel mechanisms include: An eccentric wheel is eccentrically mounted on the drive shaft; one end of the drive shaft is driven and connected to the output shaft of the forward and reverse servo motor. The lifting frame is a square frame structure, which is slidably fitted onto the eccentric wheel; the non-filtering surface of the movable filter plate is provided with a back rod, the bottom end of which is fixedly connected to the top rod, and the top rod is fixedly connected to the lifting frame.

[0009] Furthermore, the first cavity has a slag collection cavity below it, which is connected to the first cavity through a circular cavity. The circular cavity is placed horizontally, and a spiral pusher is coaxially rotated inside the circular cavity. The drive shaft is coaxially fixedly connected to the spiral pusher.

[0010] Furthermore, the top of the purification box is provided with a top inlet, which is connected to the other end of the water inlet pipe; A first flange gate valve is installed on the water inlet pipe; A second flange gate valve is installed on the return water pipe; A third flange gate valve is installed on the connecting pipe, which is used to control the opening and closing of the connecting pipe.

[0011] Furthermore, the water quality monitoring component is installed at the bottom outlet. This component includes a water quality sensor, an electric valve, and a straight-through connector of equal diameter. Both the electric valve and the water quality sensor are installed at the bottom outlet via the straight-through connector. The electric valve controls the opening and closing of the bottom outlet. The water quality sensor is connected to the electric valve via a circuit board. The water quality sensor is housed within its housing for protection. The housing is connected to the bottom outlet via the straight-through connector, allowing water from the bottom outlet to enter the housing for monitoring. Based on the data from the water quality processor, the electric valve is controlled to open and close the bottom outlet.

[0012] Furthermore, the purification box is fixedly installed inside the square processing box by supporting corner plates; The purification component includes a flat plate, which is fixedly installed on the inner wall of the purification box by stainless steel corner brackets. A sliding track is fixedly installed on the flat plate, and multiple modified biochar filter rods are supported and installed on the sliding track. The multiple modified biochar filter rods installed in the purification box can slow down the water flow speed and improve the purification effect.

[0013] Furthermore, the side wall of the purification chamber is equipped with a flip door corresponding to the purification component. By opening the flip door, the modified biochar filter rod of the purification component can be easily replaced. The flip door includes a sealing strip, a door hinge, and a flip plate. The door hinge is located on the side wall of the purification chamber, and the flip plate is connected to the door hinge. The flip plate can be opened to facilitate the removal of the purification component from the purification chamber. At the same time, the used modified biochar can be converted into charcoal fertilizer for farmland fertilization, realizing multi-level energy utilization. The sealing strip is wrapped around the outer ring of the flip plate. The sealing strip ensures the airtightness of the purification chamber and improves the purification efficiency.

[0014] Furthermore, the modified biochar filter rod is filled with adsorption packing material, and the preparation method of the adsorption packing material includes the following steps: Take rice husks, wash and air dry them, then crush them into powder. Weigh out 300g of rice husk powder. Feed is introduced after the biomass continuous pyrolysis reaction platform reaches 500°C and waits for ten minutes. After carbonization, the material is allowed to cool naturally, then ground through a 150-mesh sieve, repeatedly washed with distilled water, dried to constant weight, and then sealed in a sealed bag for storage. Take 2g of dried biomass raw material, set the solution impregnation concentration to 1.0mol / L, and impregnate the biomass raw material in the solution at a ratio of 1:10 (mass of biomass raw material to volume of magnesium chloride solution). Mix and shake for 24h at a speed of 150r / min, filter, dry the resulting solid mixture at 80℃, and then place it in a sealed container for high-temperature pyrolysis at 550℃ in a muffle furnace for 2h. After cooling, rinse with deionized water, dry, and grind through a 150-mesh sieve to obtain modified biochar.

[0015] Compared with existing technologies, the beneficial effects of the eutrophication livestock and poultry aquaculture water treatment device based on modified biochar of the present invention are: First, this invention features a filter plate installed in the upper inner cavity of the purification tank. The filter plate filters suspended solids in the water, achieving solid-liquid separation. Multiple purification components are installed in the lower inner cavity of the purification tank. Water entering the tank through the top inlet is first filtered by the filter plate, and then the purification components adsorb and treat the water to purify it. The purified water is discharged through the bottom outlet. A water quality monitoring component detects the water discharged from the bottom outlet, monitoring key parameters such as nitrogen and phosphorus content inside the tank in real time. Based on data analysis, it compares whether the discharge standards are met, thereby controlling the opening and closing of the electric valve, thus improving the purification effect on eutrophic water bodies. Second, this invention specifically treats eutrophic livestock and poultry aquaculture water bodies by using biochar materials to modify and optimize the biochar, thereby improving its performance in treating nitrogen and phosphorus in the water. Third, after passing through the purification box of this invention, the modified biochar filter rods and their packing materials can absorb nitrogen and phosphorus from the eutrophic water. The purified water then flows back into the soil, forming a large cycle. Meanwhile, the biochar adsorbs the nitrogen and phosphorus contained in the eutrophic water in the soil, forming biochar fertilizer that returns to the soil, forming a small cycle. The formation of both large and small cycles incorporates agricultural production into the ecosystem cycle, putting the entire production process on a virtuous cycle track of sustainable development and realizing multi-level recycling of materials and energy. Fourth, when the eccentric wheel mechanism provided by the present invention is used, the drive shaft is rotated by a forward and reverse servo motor. On the one hand, the drive shaft drives the spiral pusher to rotate, pushing the filtered impurities in the circular cavity to avoid the accumulation of filtered impurities at the slag collection port. On the other hand, the drive shaft drives the eccentric wheel to rotate, pushing the lifting frame to move up and down reciprocally, so as to push the movable filter plate to move up and down, and use the cleaning rod group to clean the filter surface of the movable filter plate synchronously. Attached Figure Description

[0016] Figure 1 This is a first-view structural diagram of the eutrophic livestock and poultry aquaculture water treatment device based on modified biochar according to the present invention. Figure 2This is a second-view structural diagram of the eutrophic livestock and poultry aquaculture water treatment device based on modified biochar according to the present invention. Figure 3 This is a schematic diagram of the structure of the purification box provided by the present invention; Figure 4 Another structural view of the purification box provided by the present invention; Figure 5 This is a schematic diagram of the structure of the water quality monitoring component provided by the present invention; Figure 6 This is a schematic diagram of the internal structure of the purification box provided by the present invention; Figure 7 This is another structural schematic diagram of the purification box provided by the present invention; Figure 8 This is a schematic diagram of the structure of the purification component provided by the present invention; Figure 9 This is a schematic diagram of the modified biochar filter rod in the purification component of the present invention; Figure 10 This is a schematic diagram of the sliding track in the purification component of the present invention; Figure 11 This is a schematic diagram of the internal structure of the water collection tank provided by the present invention; Figure 12 This is a schematic diagram of the cleaning rod assembly in the water collection tank of the present invention; Figure 13 This is a schematic diagram showing the cooperation between the movable filter plate and the lifting frame in the water collection tank of the present invention.

[0017] The attached figures are labeled as follows: 1. Water collection tank; 101. First chamber; 102. Second chamber; 103. Upper support plate; 104. Movable filter plate; 105. Back rod; 106. Guide rod; 107. Forward and reverse servo motor; 108. Slag collection port; 109. Circular cavity; 110. Slag discharge port; 111. Slag collection chamber; 112. Top rod; 113. Lifting frame; 114. Drive shaft; 115. Cleaning rod; 116. Lower support rod; 117. Eccentric wheel; 2. Square-shaped casing; 3. Water collection pipe; 31. Fourth flange gate valve; 4. Inlet pipe; 41. First flange gate valve; 5. Return water pipe; 51. Second flange gate valve; 6. Connecting pipe; 61. Third flange gate valve; 7. Square-shaped cabinet door hinges; 8. Hook and latch lock; 9. Cleanroom; 91. Top inlet; 92. Bottom outlet; 93. Supporting corner plates; 10. Filter plate; 11. Modified biochar filter rod; 12. Sliding track; 13. Flat plate; 14. Stainless steel corner bracket; 15. Flip door; 16. Sealing strip; 17. Cleanroom door hinge; 18. Flip plate; 19. Water quality sensor; 191. Sensor housing; 20. Electric valves; 21. Equal diameter straight connectors. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0019] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0020] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, a water treatment device for eutrophic livestock and poultry farming based on modified biochar is provided, including a water collection tank 1 and a square treatment tank 2. Specifically, a water collection pipe 3 is installed on one side of the water collection tank 1, and a fourth flange gate valve 31 is installed on the water collection pipe 3 to control the opening and closing of the water collection pipe 3. In one implementation, an inlet pipe 4 and a return pipe 5 are respectively connected to the other side of the water collection tank 1; the other end of the inlet pipe 4 is connected to the purification box 9 installed inside the square treatment box 2, and the other end of the return pipe 5 extends into the square treatment box 2, and the return pipe 5 inside the square treatment box 2 is located below the purification box 9, and the other end of the return pipe 5 is connected to the connecting pipe 6. A first flange gate valve 41 is installed on the water inlet pipe 4; A second flange gate valve 51 is installed on the return water pipe 5.

[0021] like Figure 1 , Figures 11-13 As shown, in one implementation, the water to be treated enters the water collection tank 1 through the water collection pipe 3 and needs to be filtered in the water collection tank 1 to remove large-volume impurities from the water. Specifically, a cleaning rod assembly is vertically fixed inside the water collection tank 1. The cleaning rod assembly divides the inside of the water collection tank 1 into a first cavity 101 and a second cavity 102. The cleaning rod assembly is located on the filter surface of the movable filter plate 104. When the movable filter plate 104 undergoes a vertical position change, the cleaning rod assembly cleans the filter surface of the movable filter plate 104. Among them, such as Figure 11 and Figure 12As shown, the cleaning rod assembly includes an upper support plate 103, with several lower support rods 116 evenly spaced at the lower end of the upper support plate 103. Each lower support rod 116 is equipped with several cleaning rods 115. The cleaning rods 115 on adjacent lower support rods 116 are staggered vertically. When the movable filter plate 104 changes its vertical position, the cleaning rods 115 can clean the filter surface of the movable filter plate 104 of the attached filter residue. The staggered cleaning rods 115 can cover a wider range of the filter surface to be cleaned. In other words, the vertical rectangular area of ​​the movable filter plate 104 between two adjacent lower support rods 116 can be completely cleaned.

[0022] In one implementation, the vertical position change of the movable filter plate 104 is achieved by pushing it with an electric telescopic rod; In another implementation, the vertical position change of the movable filter plate 104 is driven by an eccentric wheel mechanism; In one implementation, the cleaning rod 115 is a downward-sloping rod structure, which helps the filter residue to be cleaned to fall off; the cleaning rods 115 intersecting each other in the area between adjacent lower support rods 116 form an S-shaped channel, which facilitates the rapid falling and discharge of filtered impurities.

[0023] Please continue to refer to Figures 11-13 In one implementation, a slag collection chamber 111 is located below the first chamber 101. The slag collection chamber 111 is connected to the first chamber 101 via a circular cavity 109, which is horizontally positioned. A spiral pusher is coaxially mounted inside the circular cavity 109. When the spiral pusher rotates, it pushes the filtered impurities inside the circular cavity 109 to move. One end of the circular cavity 109 is connected to the first chamber 101 via a slag collection port 108, and the other end of the circular cavity 109 is connected to the slag collection chamber 111 via a slag discharge port 110. That is, the rotating spiral pusher causes the filtered impurities entering the circular cavity 109 from the slag collection port 108 to be sent to the slag discharge port 110 and into the slag collection chamber 111. Preferably, the bottom of the slag collection chamber 111 has a slag removal port, which is controlled to open or close by a valve. When closed, the slag removal port does not leak water.

[0024] Optionally, the eccentric wheel mechanism provided in this embodiment is connected to the helical pusher, meaning that the pushing and moving process of the filter cake in the circular cavity 109 is synchronized with the vertical position change process of the movable filter plate 104; wherein, please refer to Figure 13 The eccentric wheel mechanism includes an eccentric wheel 117, which is eccentrically mounted on a drive shaft 114. The drive shaft 114 is coaxially and fixedly connected to the propeller. The other end of the drive shaft 114 is driven and connected to the output shaft of the forward and reverse servo motor 107. The eccentric wheel mechanism also includes a lifting frame 113, which is a square frame structure and is slidably sleeved on the eccentric wheel 117. Furthermore, the non-filtering surface of the movable filter plate 104 is provided with a back rod 105, the bottom end of the back rod 105 is fixedly connected to the top rod 112, and the top rod 112 is fixedly connected to the lifting frame 113. Optionally, the top end of the back rod 105 is slidably sleeved on the guide rod 106, and the top end of the guide rod 106 is fixedly connected to the top plate of the water collection tank 1.

[0025] In use, the eccentric wheel mechanism provided in this embodiment uses the forward and reverse servo motor 107 to rotate the drive shaft 114. On the one hand, the drive shaft 114 drives the spiral pusher to rotate, pushing the filtered impurities in the circular cavity 109 to prevent the filtered impurities from accumulating at the slag collection port 108. On the other hand, the drive shaft 114 drives the eccentric wheel 117 to rotate, pushing the lifting frame 113 to move up and down reciprocally, thereby pushing the movable filter plate 104 to move up and down, and using the cleaning rod assembly to clean the filter surface of the movable filter plate 104 synchronously.

[0026] Please continue reading. Figures 1-4 The eutrophic livestock and poultry aquaculture water treatment device based on modified biochar of the present invention also includes a water quality monitoring component, which is installed in the bottom inner cavity of the square treatment box 2. The water quality monitoring component is used to monitor the water quality discharged from the purification box 9 in real time.

[0027] Preferably, the bottom of the purification box 9 is provided with a bottom outlet 92, which is connected to the return water pipe 5, and the water discharged from the purification box 9 enters the return water pipe 5. In one implementation, the top of the purification tank 9 is provided with a top inlet 91, which is connected to the other end of the water inlet pipe 4. After the first flange gate valve 41 is opened, the sewage to be purified in the water collection tank 1 is sent back into the purification tank 9 through the water inlet pipe 4 and the top inlet 91 by a water pump. Furthermore, a third flange gate valve 61 is provided on the connecting pipe 6, which is used to control the opening and closing of the connecting pipe 6.

[0028] Furthermore, the square processing box 2 is provided with a square processing box door hinge 7 and a latch lock 8 that cooperate with each other, so as to facilitate opening or closing the box door of the square processing box 2.

[0029] Please continue reading. Figure 6 In this embodiment of the invention, a filter plate 10 is provided in the upper inner cavity of the purification box 9. The filter plate 10 can filter suspended solids in the water, thereby achieving a further solid-liquid separation effect. Preferably, the pore size of the filter plate 10 is smaller than that of the movable filter plate 104.

[0030] The lower inner cavity of the purification box 9 is equipped with multiple purification components. Water entering the purification box 9 through the top inlet 91 is first filtered by the filter plate 10, and then the purification components adsorb the water to purify it. The purified water is discharged through the bottom outlet 92. The water quality monitoring component detects the water discharged from the bottom outlet 92, monitors key parameters such as nitrogen and phosphorus content inside the tank in real time, and combines data analysis to compare whether it meets the discharge standards. This controls the opening and closing of the electric valve 20, thereby improving the purification effect on eutrophic water bodies. If the water quality discharged from the bottom outlet 92 does not meet the discharge standards, the second flange gate valve 51 is opened and the third flange gate valve 61 is closed, so that the water flows back into the water collection tank 1 and the square treatment tank 2 through the return water pipe 5 for secondary purification; if the water quality discharged from the bottom outlet 92 meets the discharge standards, the third flange gate valve 61 is opened and the qualified water is discharged through the connecting pipe 6.

[0031] This invention, through the measurement and analysis of nitrogen and phosphorus in water, can more accurately assess the eutrophication level of aquaculture water bodies, enabling water body control and eutrophication treatment.

[0032] like Figure 4 and Figure 5 As shown, in this embodiment of the invention, the water quality monitoring component is installed on the bottom outlet 92; Specifically, the water quality monitoring component includes a water quality sensor 19, an electric valve 20, and an equal-diameter straight connector 21. The electric valve 20 and the water quality sensor 19 are both installed on the bottom outlet 92 through the equal-diameter straight connector 21. The electric valve 20 is used to control the opening and closing of the bottom outlet 92. The water quality sensor 19 and the electric valve 20 are connected through a circuit board. The water quality sensor 19 is housed inside the sensor housing 191 to provide protection for the water quality sensor 19. In one implementation, the sensor housing 191 is connected to the bottom outlet 92 via a straight-through connector 21 of equal diameter, allowing water at the bottom outlet 92 to enter the sensor housing 191 so that the water quality sensor 19 can monitor the water quality. Based on the data fed back by the water quality processor, the electric valve 20 is controlled to open and close the bottom outlet 92.

[0033] Preferably, the purification box 9 is fixedly installed inside the square treatment box 2 by means of a support corner plate 93.

[0034] Furthermore, such as Figures 6-10As shown, the purification component includes a plate 13, which is fixedly installed on the inner wall of the purification box 9 by stainless steel corner brackets 14. A sliding rail 12 is fixedly provided on the plate 13, and multiple modified biochar filter rods 11 are supported and installed on the sliding rail 12. like Figure 10 As shown, the right-angle bend of the sliding track 12 is an integrally formed sliding plate and a support plate. The integrally formed sliding plate and support plate on the sliding track 12 can prevent the filter rod from shifting when it is not moving. The two modified biochar filter rods 11 fixedly placed on the sliding track 12 are in contact with each other, and the contact friction between them can also play a certain role in fixing them. Optionally, the support plate can adopt an arc-shaped structure that matches the modified biochar filter rod 11. The arc-shaped support plate has a certain elasticity, which facilitates the installation of the modified biochar filter rod 11 and further improves the fixing effect of the modified biochar filter rod 11. The specific structure of the support plate and the sliding plate is not limited, as long as they are used to fix the modified biochar filter rod 11.

[0035] The multiple modified biochar filter rods 11 installed in the purification box 9 can slow down the water flow and improve the purification effect; when replacing the modified biochar filter rods 11, the round rod part of the modified biochar filter rod 11 that is not a filter hole can be easily picked up by the manager. Two modified biochar filter rods 11 form a group, and the number of groups of modified biochar filter rods 11 is not limited.

[0036] Accordingly, in this embodiment of the invention, a flip door 15 corresponding to the purification component is provided on the side wall of the purification box 9. By opening the flip door 15, the modified biochar filter rod 11 of the purification component can be easily replaced. The flip door 15 includes a sealing strip 16, a purification box door hinge 17, and a flip plate 18. The purification box door hinge 17 is provided on the side wall of the purification box 9, and the flip plate 18 is connected to the purification box door hinge 17. The flip plate 18 can be opened to facilitate the removal of the purification component from the purification box 9. At the same time, the used modified biochar can be converted into charcoal fertilizer for use in farmland fertilization, realizing multi-level energy utilization. The sealing strip 16 is wrapped around the outer ring of the flip plate 18. The sealing strip 16 ensures the airtightness of the purification box 9 and improves the purification efficiency.

[0037] Furthermore, the modified biochar filter rod 11 of the present invention is filled with adsorption packing material, and the preparation method of the adsorption packing material includes the following steps: Take rice husks, wash and air dry them, then crush them into powder. Weigh out 300g of rice husk powder. Feed material after the biomass continuous pyrolysis reaction platform (BCP-500) reaches 500°C and waits for ten minutes; After carbonization, the material was allowed to cool naturally, then ground through a 150-mesh sieve, repeatedly washed with distilled water, dried to constant weight, and sealed in a sealed bag for later use. This is unmodified biochar; it is labeled as DBC (rice husk biochar). Take 2g of dried biomass raw material, set the solution impregnation concentration to 1.0mol / L, and the ratio of biomass raw material mass (g) to magnesium chloride solution volume (mL) is 1:10. Impregnate the biomass raw material in the solution, mix and shake for 24h at a speed of 150r / min, filter, dry the resulting solid mixture at 80℃, and then put it into a sealed container for high-temperature pyrolysis at 550℃ in a muffle furnace for 2h. After cooling, rinse with deionized water, dry, and grind through a 150-mesh sieve to obtain modified biochar.

[0038] In summary, this invention specifically addresses eutrophic livestock and poultry aquaculture water bodies by innovatively utilizing biochar materials to modify and optimize the treatment process, thereby improving the nitrogen and phosphorus treatment performance of the water.

[0039] Eutrophic water bodies pass through the purification box 9 of this invention, where modified biochar filter rods 11 and their packing materials absorb nitrogen and phosphorus from the water. The purified water then flows back into the soil, forming a large cycle. Meanwhile, biochar adsorbs nitrogen and phosphorus from the eutrophic water in the soil, forming biochar fertilizer that returns to the soil, forming a small cycle. The formation of these two cycles, "large and small," integrates agricultural production into the ecosystem cycle, enabling the entire production process to enter a virtuous cycle of sustainable development and achieving multi-level recycling of materials and energy.

[0040] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Other modifications can be readily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. A water treatment device for eutrophic livestock and poultry farming based on modified biochar, characterized in that, include: A square processing box, with a purification chamber supported inside; a filter plate is installed in the upper inner cavity of the purification chamber, and multiple purification components are installed in the lower inner cavity of the purification chamber; a bottom outlet is provided at the bottom of the purification chamber. A water collection tank is provided with a water collection pipe on one side; an inlet pipe and a return pipe are respectively connected to the other side of the water collection tank; the other end of the inlet pipe is connected to a purification tank installed inside the square treatment box, and the other end of the return pipe extends into the square treatment box, and the return pipe inside the square treatment box is located below the purification tank, and the other end of the return pipe is connected to a connecting pipe; the bottom outlet is connected to the return pipe, and the water discharged from the purification box enters the return pipe. A cleaning rod assembly is vertically fixed inside the water collection tank, dividing the tank into a first chamber and a second chamber. The cleaning rod assembly is located on the filter surface of the movable filter plate and remains stationary. Filter residue is cleaned only by the vertical movement of the movable filter plate. When the movable filter plate changes position vertically, the cleaning rod assembly cleans the filter surface. The cleaning rod assembly includes an upper support plate with several lower support rods evenly spaced at its lower end. Each lower support rod has several cleaning rods, and the cleaning rods on adjacent lower support rods are staggered vertically. When the movable filter plate changes position vertically, the cleaning rods clean the filter surface of the movable filter plate of any adhering filter residue. The cleaning rod is a rod structure that slopes downwards, and the cleaning rods that intersect with each other in the area between adjacent lower support rods form an S-shaped channel; the vertical position change of the movable filter plate is driven by an eccentric wheel mechanism; the eccentric wheel mechanism includes an eccentric wheel and a lifting frame, and the eccentric wheel is eccentrically mounted on the drive shaft; one end of the drive shaft is driven and connected to the output shaft of the forward and reverse servo motor; The lifting frame is a square frame structure, which is slidably fitted onto the eccentric wheel; the non-filtering surface of the movable filter plate is provided with a back rod, the bottom end of which is fixedly connected to the top rod, and the top rod is fixedly connected to the lifting frame; there is a slag collection chamber below the first chamber, which is connected to the first chamber through a circular cavity. The circular cavity is placed horizontally, and a spiral pusher is coaxially rotated inside the circular cavity. The drive shaft is coaxially fixedly connected to the spiral pusher; the pushing and moving process of the filter slag inside the circular cavity is synchronized with the vertical position change process of the movable filter plate; The water quality monitoring component is used to monitor the water discharged from the purification tank. The water quality monitoring component is installed in the bottom inner cavity of the square treatment tank.

2. The eutrophication livestock and poultry aquaculture water treatment device based on modified biochar according to claim 1, characterized in that, The purification chamber is equipped with a top inlet; The top inlet connects to the other end of the water inlet pipe; A first flange gate valve is installed on the water inlet pipe; A second flange gate valve is installed on the return water pipe; A third flange gate valve is installed on the connecting pipe, which is used to control the opening and closing of the connecting pipe.

3. The eutrophic livestock and poultry aquaculture water treatment device based on modified biochar according to claim 2, characterized in that, The water quality monitoring component is installed at the bottom outlet; the water quality monitoring component includes a water quality sensor, an electric valve and an equal diameter straight connector, wherein the electric valve and the water quality sensor are both installed at the bottom outlet through the equal diameter straight connector, the electric valve is used to control the opening and closing of the bottom outlet, the water quality sensor and the electric valve are connected through a circuit board, and the water quality sensor is installed inside the sensor housing; The sensor housing and the bottom outlet are connected by a straight connector of equal diameter. Water from the bottom outlet enters the sensor housing and is monitored by a water quality sensor. Based on the data fed back by the water quality processor, the electric valve is controlled to open and close the bottom outlet.

4. The eutrophic livestock and poultry aquaculture water treatment device based on modified biochar according to claim 3, characterized in that, The purification box is fixedly installed inside the square processing box by supporting corner plates; The purification component includes a flat plate, which is fixedly installed on the inner wall of the purification box by stainless steel corner brackets. A sliding track is fixedly installed on the flat plate, and multiple modified biochar filter rods are supported and installed on the sliding track.

5. The eutrophication livestock and poultry aquaculture water treatment device based on modified biochar according to claim 4, characterized in that, The side wall of the purification chamber is equipped with a flip door corresponding to the purification components; The flip door includes a sealing strip, a door hinge, and a flip plate. The door hinge is located on the side wall of the purification chamber, and the flip plate is connected to the door hinge. The sealing strip is wrapped around the outer ring of the flip plate.

6. The eutrophic livestock and poultry aquaculture water treatment device based on modified biochar according to claim 5, characterized in that, The modified biochar filter rod is filled with adsorption packing material, and the preparation method of the adsorption packing material includes the following steps: Take rice husks, wash and air dry them, then crush them into powder. Weigh out 300g of rice husk powder. Feed is introduced after the biomass continuous pyrolysis reaction platform reaches 500°C and waits for ten minutes. After carbonization, the material is allowed to cool naturally, then ground through a 150-mesh sieve, repeatedly washed with distilled water, dried to constant weight, and then sealed in a sealed bag for storage. Take 2g of dried biomass raw material, set the solution impregnation concentration to 1.0mol / L, and impregnate the biomass raw material in the solution at a ratio of 1:10 (mass of biomass raw material to volume of magnesium chloride solution). Mix and shake for 24h at a speed of 150r / min, filter, and dry the resulting solid mixture at 80℃. Then place it in a sealed container and pyrolyze it in a muffle furnace at 550℃ for 2h. After cooling, rinse with deionized water, dry, and grind through a 150-mesh sieve to obtain modified biochar. Use the modified biochar as an adsorption filler.

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