Agricultural non-point source pollution treatment device

Abstract

The invention discloses an agricultural non-point source pollution treatment device which comprises a filter box with a water inlet, at least three layers of drawer units are arranged in the filter box, and each layer of drawer unit is provided with a drawer type filter box. Pollutants in sewage are removed through physical adsorption of the filter material, and the degradation capacity of the pollutants is greatly improved by combining the aeration degradation effect of microorganisms; the filter material in the adsorption area in each layer of drawer type filter box is of a layered movable filling structure, so that the filter material is convenient to replace after the adsorption saturation of each layer of filter material; the pollution state of the filter material is visually observed through the transparent observation window, so that the replacement time is accurately judged, and therefore, the agricultural non-point source pollution treatment device not only realizes collaborative treatment of filter material adsorption and biological aeration degradation, but also can observe the use condition of each layer of filter material assembly in real time, so that the filter material is convenient to replace and maintain, and the service life of the filter material assembly is prolonged. The agricultural non-point source pollution treatment efficiency is greatly improved, and the method is suitable for popularization and application.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural pollution control, and particularly relates to an agricultural non-point source pollution treatment device. BACKGROUND

[0002] The agricultural non-point source pollution has the characteristics of dispersed pollution source, complex discharge path and various pollutant components, and has become an important problem affecting the ecological environment. At present, the agricultural non-point source pollution treatment is usually used for removing nitrogen, phosphorus, organic matter and pesticide residues in water bodies such as farmland runoff and breeding wastewater.

[0003] In the agricultural non-point source pollution treatment, the filter material assembly is a core purification unit, and its performance directly affects the pollutant removal efficiency. However, the existing traditional filter material only removes pollutants by physical adsorption without combining microbial degradation, resulting in low removal rate (usually ≤ 60%) of nutrients such as nitrogen and phosphorus, and no subsequent degradation ability after adsorption saturation, which causes low working efficiency. Moreover, the existing filter material is mostly in a layered fixed filling structure, and the whole filter material needs to be replaced after the adsorption saturation of a single level filter material, which is high in material cost. In addition, the pollution state of the filter material cannot be directly observed, and sampling detection can be achieved only by disassembling the assembly, which is complicated in operation and difficult to accurately determine the replacement time.

[0004] In view of this, the present application provides an agricultural non-point source pollution treatment device, so as to realize a filter material assembly with adsorption and biological degradation cooperation, easy maintenance and real-time observation, and improve the agricultural non-point source pollution treatment efficiency. SUMMARY

[0005] Based on the technical problems existing in the background art, the present application provides an agricultural non-point source pollution treatment device.

[0006] The agricultural non-point source pollution treatment device provided by the present application comprises a filter box provided with a water inlet, the inside of the filter box is provided with at least three drawer units, each drawer unit is provided with a drawer type filter box; the inner side wall of the filter box and the outer side wall of the drawer type filter box are provided with matched slide rail assemblies, and the drawer type filter box can be pulled along the slide rail assemblies; the inside of the filter box is provided with an adsorption zone along the water flow direction from top to bottom; one side of the filter box is provided with a biological treatment tank, and the biological treatment tank is provided with a biological zone for wastewater treatment;

[0007] The adsorption zone comprises modified filter materials filled in each drawer type filter box, and the modified filter materials are sequentially arranged in the drawer type filter box from top to bottom, and the modified filter materials are nano iron modified quartz sand, graphene modified activated carbon and slow-release carbon source-boehmite composite; the bottom of each drawer type filter box is provided with a filter port, and the filter port is provided with a filter plate; the bottom of the filter box is provided with a support frame, the inner side of the support frame is provided with a support plate, the support plate is provided with a water collecting tank, the bottom center of the filter box is provided with a water collecting funnel, and the bottom of the water collecting funnel is connected with the water collecting tank; the outer side of the water collecting tank is provided with a water pump, and the water pump is connected with the biological treatment tank through a hose.

[0008] The biological area comprises a porous ceramic rod arranged in the biological treatment tank, the porous ceramic rod is a hollow structure; the inside of the porous ceramic rod is inoculated with a mixed bacteria group of nitrifying bacteria and denitrifying bacteria; the top and bottom of the porous ceramic rod are provided with aeration branch pipes; the rod wall and the aeration branch pipes are provided with micro-aeration holes; the left side of the biological treatment tank is externally provided with a micro-aeration pump; the left side inner wall of the biological treatment tank is provided with a telescopic sleeve, one end of the telescopic sleeve is connected with the inner cavity of the porous ceramic rod, and the other end of the telescopic sleeve is connected with the micro-aeration pump through a connecting pipe; the right outer side of the biological treatment tank is further provided with a driving unit for driving the porous ceramic rod.

[0009] The outer side of the drawer filter box is respectively provided with a handle and a transparent observation window.

[0010] Further, the size of the drawer filter box is 150cm*130cm*120cm, the particle size of the nano-iron modified quartz sand in the upper adsorption area is 2-3mm, and the filling height is 6-8cm; the particle size of the graphene modified activated carbon in the middle layer is 1-2mm, and the filling height is 5-7cm; the particle size of the slow-release carbon source-zeolite composite in the lower layer is 3-5mm, and the filling height is 4-6cm.

[0011] Further, the diameter of the porous ceramic rod is 5cm, the length of the porous ceramic rod is 125cm, the porosity of the porous ceramic rod is 60%-70%, the diameter of the micro-aeration hole is 0.1mm, and at least two porous ceramic rods are arranged in the biological area in the biological treatment tank.

[0012] Further, the slow-release carbon source in the slow-release carbon source-zeolite composite is a starch-polyvinyl alcohol composite, and accounts for 15%-25% of the total mass of the composite.

[0013] Further, the transparent observation window is made of transparent tempered glass, and the size is 10cm*8cm.

[0014] Further, the driving unit comprises a driving box arranged on the right outer side of the biological treatment tank, a door-shaped movable frame is slidingly installed on the top inner wall of the driving box, a driving motor is fixedly installed in the door-shaped movable frame through a mounting seat, a circular gear and a first bevel gear are fixedly sleeved on the output shaft of the driving motor, a second bevel gear is meshed with the first bevel gear, an movable rod is fixedly connected with the second bevel gear, the movable rod is rotatably connected with the door-shaped movable frame through a bearing, and the other end of the movable rod is movably penetrated into the biological treatment tank and fixedly connected with one end of the porous ceramic rod; a straight rack is fixedly arranged on the bottom inner wall of the driving box, and the circular gear is meshed with the straight rack.

[0015] As further of the present application, the side inner wall of the biological treatment tank is fixed with a sealing sliding sleeve, the movable rod is sealingly slid through the sealing sliding sleeve, and the movable rod is based on the movement track in the sealing sliding sleeve to be horizontally displaced and cooperated with the rotating movement; the front side of the biological treatment tank is further provided with a drain pipe.

[0016] As further of the present application, the top of the door type movable frame is provided with a guide sliding block, and the top inner wall of the driving box is provided with a sliding rail, and the guide sliding block is slidably installed on the sliding rail in the horizontal direction.

[0017] The present application has the following advantages:

[0018] 1. In the present application, the nitrogen and phosphorus removal rates and the organic matter removal rates are greatly improved through the synergistic effect of the adsorption filter materials and the functional bacteria in each layer, the synergistic purification efficiency is improved, and the problem of single function of traditional filter materials is solved.

[0019] 2. In the present application, the drawer type structure realizes single layer independent replacement without the need of overall disassembly, which is beneficial to reduce the filter material replacement cost, and the replacement process does not affect the operation of other units, so that the maintenance cost is low.

[0020] 3. In the present application, the transparent observation window is arranged, the pollution state of the filter material in each layer can be directly judged, the filter material performance can be quickly observed, so that precise maintenance can be realized subsequently, and the state can be monitored; the filter material ratio and the biological flora can be adjusted according to the pollution water quality characteristics, so as to adapt to different types of agricultural non-point source pollution treatment requirements, and the adaptability is strong.

[0021] 4. In the present application, during the aeration process of the porous ceramic rod, the driving motor in the driving unit can also work in reverse, which can not only make the porous ceramic rod and the aeration branch move left and right to expand the aeration range of the porous ceramic rod and the aeration branch, so that the aeration area is wider, and the biological aeration degradation effect of the porous ceramic rod and the aeration branch in the biological treatment tank is better and more sufficient; but also can make the porous ceramic rod and the aeration branch aeration in forward and reverse rotation, which can ensure that the porous ceramic rod and the aeration branch and the biological zone are more fully aerated and degraded, and only through the work of one driving motor, the porous ceramic rod and the aeration branch can be aerated in left and right movement and forward and reverse rotation, so that the final biological aeration treatment effect is better, and the removal efficiency of pollutants is greatly improved.

[0022] To sum up, in the present application, not only the pollutants in the sewage are removed by physical adsorption of the filter material, but also the degradation capacity of the pollutants is greatly improved by the aeration degradation of the microorganisms; the filter material in the adsorption zone of each layer of the drawer-type filter box is in a layered movable filling structure, so that the filter material can be replaced conveniently when the filter material in each layer is saturated; the pollution state of the filter material can be observed directly through the transparent observation window, so that the replacement time can be judged accurately, so that the agricultural non-point source pollution treatment device can realize the synergistic treatment of filter material adsorption and biological aeration degradation, and the use condition of each layer of filter material assembly can be observed in real time, so that the filter material can be replaced and maintained conveniently; meanwhile, only by the working of one driving motor, the porous ceramic rod and the aeration branch pipe can be aerated in the left-right movement and the forward and reverse rotation, so that the final biological aeration treatment effect is better, the efficiency of the agricultural non-point source pollution treatment is greatly improved, and the present application is suitable for popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A structure schematic view of an agricultural non-point source pollution treatment device according to the present application is shown in the figure.

[0024] Figure 2 A structure schematic view of a biological treatment tank in a part of the present application is shown in the figure.

[0025] Figure 3 A sectional structure schematic view of the present application is shown in the figure.

[0026] Figure 4 A structure schematic view of a part of the present application is shown in the figure. Figure 3

[0027] Figure 5 An enlarged structure schematic view of part A of the present application is shown in the figure. Figure 4

[0028] A structure schematic view of the relationship among the movable rod, the driving motor, the circular gear, the first bevel gear and the second bevel gear in the present application is shown in the figure. Figure 6

[0029] ​​In the figure: 1, filter box; 101, water inlet; 2, drawer filter box; 201, slide rail assembly; 202, handle; 203, transparent observation window; 204, filter port; 205, filter plate; 3, nano iron modified quartz sand; 4, graphene modified activated carbon; 5, slow-release carbon source-zeolite composite; 601, water collecting funnel; 602, support plate; 603, support frame; 6, water collecting tank; 7, water pump; 8, hose; 9, biological treatment tank; 901, drain pipe; 10, micro-aeration pump; 11, connecting pipe; 12, telescopic sleeve; 13, porous ceramic rod; 131, aeration branch pipe; 132, micro-aeration hole; 14, movable rod; 15, drive box; 151, drive motor; 152, circular gear; 153, straight rack; 154, door-shaped movable frame; 155, bearing; 156, first bevel gear; 157, second bevel gear; 158, guide slider; 159, mounting seat; 1510, sealing sliding sleeve. DETAILED DESCRIPTION

[0030] The application will be further described below in conjunction with specific examples.

[0031] EXAMPLE

[0032] REFERENCE Figures 1-6 In the embodiment, an agricultural non-point source pollution treatment device is provided, which comprises a filter box 1 provided with a water inlet 101, the inside of the filter box 1 is provided with at least three layers of drawer units, each layer of drawer unit is provided with a drawer filter box 2; the inner side wall of the filter box 1 and the outer side wall of the drawer filter box 2 are both provided with matching slide rail assemblies 201, the drawer filter box 2 can be pulled along the slide rail assembly 201; the inside of the filter box 1 is provided with an adsorption zone along the water flow direction from top to bottom; one side of the filter box 1 is provided with a biological treatment tank 9, the biological treatment tank 9 is provided with a biological zone for wastewater treatment;

[0033] The adsorption zone comprises modified filter materials filled in each layer of drawer filter box 2, and the modified filter materials are sequentially arranged in the drawer filter box 2 from top to bottom as nano iron modified quartz sand 3, graphene modified activated carbon 4, and slow-release carbon source-zeolite composite 5; the bottom of each layer of drawer filter box 2 is provided with a filter port 204, the filter port 204 is provided with a filter plate 205; the bottom of the filter box 1 is provided with a support frame 603, the inner side of the support frame 603 is provided with a support plate 602, the support plate 602 is provided with a water collecting tank 6, the bottom center of the filter box 1 is provided with a water collecting funnel 601, the bottom of the water collecting funnel 601 is connected with the water collecting tank 6; the outer side of the water collecting tank 6 is provided with a water pump 7, the water pump 7 is connected with the biological treatment tank 9 through a hose 8;

[0034] The biological zone comprises a porous ceramic rod 13 arranged in the biological treatment tank 9, the porous ceramic rod 13 being a hollow structure; the inside of the porous ceramic rod 13 is inoculated with a mixed bacteria group of nitrifying bacteria and denitrifying bacteria, the top and bottom of the porous ceramic rod 13 are provided with aeration branch pipes 131, the rod wall and the aeration branch pipes 131 are provided with micro-aeration holes 132, and the left side of the biological treatment tank 9 is externally provided with a micro-aeration pump 10; a telescopic sleeve 12 is arranged on the inner wall of the left side of the biological treatment tank 9, one end of the telescopic sleeve 12 is connected with the inner cavity of the porous ceramic rod 13, and the other end of the telescopic sleeve 12 is connected with the micro-aeration pump 10 through a connecting pipe 11; the right outer side of the biological treatment tank 9 is further provided with a driving unit for driving the porous ceramic rod 13; the outer side of the drawer filter box 2 is respectively provided with a handle 202 and a transparent observation window 203.

[0035] In the embodiment, the size of the drawer filter box 2 is 150 cm×130 cm×120 cm, the particle size of the nano-iron modified quartz sand 3 in the upper adsorption zone is 2-3 mm, and the filling height is 6-8 cm; the particle size of the graphene modified activated carbon 4 in the middle layer is 1-2 mm, and the filling height is 5-7 cm; the particle size of the slow-release carbon source-zeolite composite 5 in the lower layer is 3-5 mm, and the filling height is 4-6 cm.

[0036] In the embodiment, the diameter of the porous ceramic rod 13 is 5 cm, the length of the porous ceramic rod 13 is 125 cm, the porosity of the porous ceramic rod 13 is 60%-70%, the diameter of the micro-aeration hole 132 is 0.1 mm, and at least two porous ceramic rods 13 are arranged in the biological zone in the biological treatment tank 9.

[0037] In the embodiment, the slow-release carbon source in the slow-release carbon source-zeolite composite 5 is a starch-polyvinyl alcohol composite, and accounts for 15%-25% of the total mass of the composite. The transparent observation window 203 is made of transparent tempered glass, and the size is 10 cm×8 cm.

[0038] In the embodiment, the driving unit comprises a driving box 15 arranged on the right outer side of the biological treatment tank 9, a door-shaped movable frame 154 is slidably installed on the top inner wall of the driving box 15, a driving motor 151 is fixedly installed in the door-shaped movable frame 154 through a mounting seat 159, a round gear 152 and a first bevel gear 156 are fixedly sleeved on the output shaft of the driving motor 151, a second bevel gear 157 is engaged with the first bevel gear 156, an activity rod 14 is fixedly connected with the second bevel gear 157, the activity rod 14 is rotatably connected with the door-shaped movable frame 154 through a bearing 155, and the other end of the activity rod 14 is movably penetrated into the biological treatment tank 9 and fixedly connected with one end of the porous ceramic rod 13; a straight rack 153 is fixedly arranged on the bottom inner wall of the driving box 15, and the round gear 152 is engaged with the straight rack 153.

[0039] A sealing sleeve 1510 is fixedly mounted on the inner wall of one side of the biological treatment tank 9. The movable rod 14 slides in a sealed manner through the sealing sleeve 1510. The movable rod 14's motion trajectory within the sealing sleeve 1510 combines horizontal displacement with rotational motion. A drain pipe 901 is also provided on the front exterior of the biological treatment tank 9. A guide slider 158 is mounted on the top of the door-shaped movable frame 154. A slide rail is provided on the top inner wall of the drive box 15. The guide slider 158 slides horizontally on the rail.

[0040] In this embodiment, the nitrifying bacteria inoculated in the porous ceramic rod 13 are Nitrosomonas and the denitrifying bacteria are Pseudomonas, and the inoculation concentration is 10 8 CFU / g; the micro-aeration pump uses a diaphragm air pump, and the aeration cycle is controlled by a timer (30 minutes of aeration and 10 minutes of rest) to ensure that the dissolved oxygen concentration in the biological zone is maintained at 1-3 mg / L (nitrification section) and below 0.5 mg / L (denitrification section);

[0041] like Figures 1-6 As shown in the figure, the agricultural non-point source pollution control device, when in use, the polluted water flows from top to bottom through the water inlet 101 through the adsorption area in the drawer-type filter box 2 in each layer of the drawer unit in the filter box 1, the nano-iron modified quartz sand 3 in the upper adsorption area preferentially adsorbs phosphorus, the graphene modified activated carbon 4 in the middle adsorption area adsorbs pesticide residues and organic matter, and the slow-release carbon source-zeolite complex 5 in the lower adsorption area adsorbs ammonia nitrogen and releases the carbon source; then the water flows into the water collecting box 6 through the water collecting funnel 601, and is transported to the living water tank by the water pump 7 working in conjunction with the hose 8. The biological zone in the waste treatment pool 9 is aerated by a micro-aeration pump 10 at the same time, and is matched by the connecting pipe 11, the telescopic sleeve 12, the porous ceramic rod 13 and the aeration branch pipe 131, so that the nitrifying bacteria in the porous ceramic rod 13 are aerated into the water through the micro-aeration holes 132, and then the nitrifying bacteria in the porous ceramic rod 13 convert the ammonia nitrogen in the water into nitrate nitrogen, and the denitrifying bacteria aerated out of the porous ceramic rod convert the nitrate nitrogen into nitrogen gas under the action of the carbon source, so that the nitrogen can be thoroughly and effectively removed and purified; after purification, the water flow is then merged into the next link through the drain pipe 901 for processing. In addition, by providing a transparent observation window 203, the color change of the filter material in each layer of the drawer-type filter box 2 can be observed in real time (such as when the activated carbon changes from black to gray-black, it needs to be replaced), so that the filter material in each adsorption zone can be observed and replaced in time. And the filter material ratio and biological flora can also be adjusted according to the characteristics of the polluted water quality to adapt to different types of agricultural non-point source pollution control needs, making it more adaptable.

[0042] As a further implementation, during the aeration process of the porous ceramic rod 13, the driving motor 151 in the driving unit can also be used to drive the bevel gear 152 to rotate in the forward and reverse directions through the output shaft. When the bevel gear 152 rotates, it meshes with the straight rack 153 to drive the straight rack 153 to move left and right as a whole. When the straight rack 153 moves, it also drives the driving motor 151, the mounting seat 159, the door-shaped movable frame 154, and the movable rod 14 on the bearing 155 to move left and right. The movable rod 14 in turn drives the porous ceramic rod 13 and the aeration branch pipe 131 to move left and right. This can expand the aeration range of the porous ceramic rod 13 and the aeration branch pipe 131, making the aeration area wider and ensuring that the biological aeration degradation effect of the porous ceramic rod 13 and the aeration branch pipe 131 in the biological treatment tank 9 is better and more sufficient. At the same time, when the driving motor 151 works, it drives the first bevel gear 156 to rotate in the forward and reverse directions through the output shaft and meshes with the second bevel gear 157 to drive the movable rod 14 to rotate in the forward and reverse directions. The movable rod 14 in turn drives the porous ceramic rod 13 and the aeration branch pipe 131 to aerate in the forward and reverse directions. This can ensure that the porous ceramic rod 13 and the aeration branch pipe 131 are more fully aerated and degraded in the biological zone. Only one driving motor 151 is needed to work to achieve aeration of the porous ceramic rod 13 and the aeration branch pipe 131 in the left and right movements and the forward and reverse rotations, ensuring better final biological aeration treatment effect and greatly improving the removal efficiency of pollutants.

[0043] Finally, in the present application, not only is the filter material used for physical adsorption to remove pollutants from wastewater, but also the aeration degradation effect of microorganisms is combined to greatly improve the degradation capacity of pollutants. The filter material in the adsorption zone of each layer of drawer-type filter boxes 2 is a layered movable filling structure. When the filter material in each layer is saturated, the filter material can be easily replaced. The pollution state of the filter material can also be directly observed through the transparent observation window 203 to accurately determine the replacement time, so that the agricultural non-point source pollution treatment device can not only realize the synergistic treatment of filter material adsorption and biological aeration degradation, but also can observe the use of each layer of filter material components in real time, thereby facilitating the replacement and maintenance of the filter material. This greatly improves the efficiency of agricultural non-point source pollution treatment and is suitable for popularization and application.

[0044] The above describes only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes to the technical solutions and inventive concepts of the present application within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An agricultural non-point source pollution treatment device, characterized in that, The filter box (1) is provided with a water inlet (101), and the inside of the filter box (1) is provided with at least three layers of drawer units, each of which is provided with a drawer filter box (2); the inner side wall of the filter box (1) and the outer side wall of the drawer filter box (2) are provided with matched slide rail assemblies (201), and the drawer filter box (2) can be pulled along the slide rail assembly (201); the inside of the filter box (1) is provided with an adsorption zone along the water flow direction from top to bottom; one side of the filter box (1) is provided with a biological treatment tank (9), and the biological treatment tank (9) is provided with a biological zone for sewage treatment; The adsorption zone comprises modified filter material filled in each layer of drawer filter box (2), and the modified filter material is sequentially arranged in the drawer filter box (2) from top to bottom, and the modified filter material is sequentially arranged in the drawer filter box (2) from top to bottom, and the modified filter material is sequentially arranged in the drawer filter box (2) from top to bottom; the bottom of each layer of drawer filter box (2) is provided with a filter port (204), and the filter port (204) is provided with a filter plate (205); the bottom of the filter box (1) is provided with a support frame (603), the inner side of the support frame (603) is provided with a support plate (602), the support plate (602) is provided with a water collecting tank (6), the bottom of the filter box (1) is provided with a water collecting funnel (601), the bottom of the water collecting funnel (601) is connected with the water collecting tank (6); the outer side of the water collecting tank (6) is provided with a water pump (7), and the water pump (7) is connected with the biological treatment tank (9) through a hose (8); The biological zone comprises a porous ceramic rod (13) arranged in the biological treatment tank (9), and the porous ceramic rod (13) is a hollow structure; the inside of the porous ceramic rod (13) is inoculated with a mixed bacterial population of nitrifying bacteria and denitrifying bacteria, the top and bottom of the porous ceramic rod (13) are provided with aeration branch pipes (131), the rod wall of the porous ceramic rod (13) and the aeration branch pipes (131) are provided with micro-aeration holes (132), and the left outer side of the biological treatment tank (9) is provided with a micro-aeration pump (10); the left inner wall of the biological treatment tank (9) is provided with a telescopic sleeve (12), one end of the telescopic sleeve (12) is connected with the inner cavity of the porous ceramic rod (13), and the other end of the telescopic sleeve (12) is connected with the micro-aeration pump (10) through a connecting pipe (11); the right outer side of the biological treatment tank (9) is also provided with a driving unit for driving the porous ceramic rod (13); The outer side of the drawer filter box (2) is respectively provided with a handle (202) and a transparent observation window (203).

2. The agricultural non-point source pollution treatment device according to claim 1, characterized in that, The size of the drawer filter box (2) is 150cm*130cm*120cm, the particle size of the nano-iron modified quartz sand (3) in the upper layer of the adsorption zone is 2-3mm, and the filling height is 6-8cm; the particle size of the graphene modified activated carbon (4) in the middle layer is 1-2mm, and the filling height is 5-7cm; the particle size of the slow-release carbon source-zeolite composite (5) in the lower layer is 3-5mm, and the filling height is 4-6cm.

3. The agricultural non-point source pollution treatment device according to claim 1, characterized in that, The diameter of the porous ceramic rod (13) is 5 cm, the length of the porous ceramic rod (13) is 125 cm, the porosity of the porous ceramic rod (13) is 60%-70%, the diameter of the micro-aeration hole (132) is 0.1 mm, and at least two porous ceramic rods (13) are arranged in the biological zone in the biological treatment tank (9).

4. The agricultural non-point source pollution treatment device of claim 1, wherein, The slow-release carbon source in the slow-release carbon source-zeolite composite (5) is a starch-polyvinyl alcohol composite, and accounts for 15%-25% of the total mass of the composite.

5. The agricultural non-point source pollution treatment device of claim 1, wherein, The transparent observation window (203) is made of transparent tempered glass, and has a size of 10 cm x 8 cm.

6. The agricultural non-point source pollution treatment device of claim 1, wherein, The driving unit comprises a driving box (15) arranged on the right outer side of the biological treatment tank (9), a door-shaped movable frame (154) is slidably arranged on the top inner wall of the driving box (15), a driving motor (151) is fixedly arranged in the door-shaped movable frame (154) through a mounting seat (159), a round gear (152) and a first bevel gear (156) are respectively fixedly sleeved on the output shaft of the driving motor (151), a second bevel gear (157) is engaged with the first bevel gear (156), a movable rod (14) is fixedly connected with the second bevel gear (157), the movable rod (14) is rotatably connected with the door-shaped movable frame (154) through a bearing (155), and the other end of the movable rod (14) is movably inserted into the biological treatment tank (9) and fixedly connected with one end of the porous ceramic rod (13); a straight rack (153) is fixedly arranged on the bottom inner wall of the driving box (15), and the round gear (152) is engaged with the straight rack (153).

7. The agricultural non-point source pollution treatment device according to claim 6, characterized in that, A sealing sliding sleeve (1510) is fixedly sleeved on the inner wall of one side of the biological treatment tank (9), the movable rod (14) is sealingly and slidably inserted into the sealing sliding sleeve (1510), and the movable rod (14) moves horizontally based on the movement track in the sealing sliding sleeve (1510) and cooperates with the rotational movement; a drain pipe (901) is further arranged on the front outer side of the biological treatment tank (9).

8. The agricultural non-point source pollution treatment device according to claim 6, characterized in that, The top of the door-shaped movable frame (154) is provided with a guide sliding block (158), and the top inner wall of the driving box (15) is provided with a sliding rail, and the guide sliding block (158) is slidably arranged on the sliding rail in the horizontal direction.

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