Rural sewage treatment device with circulating filtration function

Abstract

The utility model discloses a rural sewage treatment device with a circulating filtration function. The rural sewage treatment device comprises a grating adjusting unit, a circulating filtration unit and an effluent sampling unit which are arranged in sequence, the circulating filtering unit comprises a pool body which comprises a water filtering pool and a water collecting pool which are communicated with each other; the filter assembly comprises a plurality of filter material layers which are arranged in the water filter tank in a layered manner; the oxygenating assembly comprises an air diffusion groove and an air draft pipe which are arranged in the filter material layer and are communicated with each other, and the air diffusion groove and the air draft pipe are both communicated with external environment air; the circulating water distribution assembly comprises a water pump arranged in the water collecting tank, a water distribution pipeline and a spray head, the water distribution pipeline and the spray head are arranged above the water filtering tank, and a water outlet of the water pump and a water outlet of the grating adjusting unit are both connected with a water inlet of the water distribution pipeline. The sewage forms liquid drops and then falls into the filter material layer, so that the contact surface of the sewage and air is increased, and the purification effect is enhanced; most of effluent filtered by the filter material layer is circularly filtered for multiple times, so that the sewage treatment effect is further enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a rural sewage treatment device with circulation filtration. Background Art

[0002] Rural domestic sewage treatment is subject to many restrictions such as construction conditions and operation and maintenance management capabilities, and cannot simply copy urban sewage treatment technology. At present, the vast majority of rural domestic sewage treatment technologies are still based on technical improvements of traditional sewage treatment processes, but in the application process, it is found that there are a series of problems such as high energy consumption, low efficiency, and difficult management. Taking the common AAO process as an example, it requires supporting equipment such as fans, water pumps, sludge pumps, etc., and consumes a lot of energy for aeration, stirring, reflux, dehydration and other operations to ensure the growth and metabolism of microorganisms, as well as the treatment process of sewage and sludge. Not only that, in order to maintain the stable operation of the sewage treatment system, a team of professionals is also needed to manage and maintain the treatment system, and ensure the normal operation of the sewage treatment system by adjusting aeration, returning sludge, etc.

[0003] On the other hand, the effluent requirements of sewage treatment systems in rural areas are much lower than those of urban sewage treatment systems. This is mainly because the sewage treatment systems in rural areas are scattered and the effluent volume is small. After being discharged into the surrounding environment, it can be further absorbed and treated by the surrounding environment. According to the traditional sewage treatment process, it not only consumes a lot of energy, but also requires a huge manpower cost for later maintenance. In the end, it only achieves excessive treatment of rural sewage, which is obviously not in line with the current actual situation of rural sewage treatment. In order to solve the problem of rural domestic sewage treatment, it is necessary to adopt sewage treatment technology that is simple in technology, easy to maintain, and low in energy consumption. Utility Model Content

[0004] In order to solve the problem of rural domestic sewage treatment, the utility model provides a rural sewage treatment device with circulating filtration, which has a simple structure, good treatment effect and is easy to maintain.

[0005] A rural sewage treatment device with circulation filtration comprises a grille adjustment unit, a circulation filtration unit and an outlet water sampling unit which are arranged in sequence; the circulation filtration unit comprises:

[0006] A pool body, comprising a water filtering pool and a water collecting pool which are interconnected;

[0007] A filter assembly, comprising a plurality of filter material layers arranged in layers in the water filter tank;

[0008] The oxygenation component includes an air diffusion groove and an air extraction pipe arranged in the filter material layer, wherein the air diffusion groove is arranged horizontally and communicated with the external air, the air extraction pipe is arranged vertically and its bottom is communicated with the air diffusion groove, and the top of the air extraction pipe extends out of the filter material layer and communicated with the external ambient air;

[0009] The circulating water distribution component includes a water pump arranged in the water collection pool and a water distributor arranged above the water filtration pool. The water outlet of the water pump and the water outlet of the grille adjustment unit are both connected to the water inlet of the water distributor.

[0010] In the sewage treatment device of the present application, the sewage is distributed in the filter material layer in the water filter tank by the water distributor after being pre-treated by the grid. The sewage forms droplets and then falls into the filter material layer, which increases the contact surface between the sewage and the air and enhances the purification effect. Most of the effluent that enters the collection tank after being filtered through the filter material layer is sent back into the water distributor by the water pump for multiple cycles of filtration, further enhancing the sewage treatment effect.

[0011] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0012] Optionally, a coarse grid and a fine grid are sequentially arranged in the grid adjustment unit along the water flow direction to intercept suspended matter in the sewage.

[0013] Optionally, the filter material layer includes a volcanic rock layer, a first ceramsite layer, a rock wool layer, a shell layer and a second ceramsite layer filled in sequence from bottom to top, and a water-proof geomembrane is arranged between the volcanic rock layer and the ceramsite layer; the first ceramsite layer has a water outlet connected to a water collection pool, the water collection pool has a water outlet connected to the volcanic rock layer, and the volcanic rock layer has a water outlet connected to a water sampling unit.

[0014] The packing arrangement uses ceramsite as the top filter material, mainly based on the dispersion and water distribution performance of droplets. Ceramsite itself is a spherical shape with a smooth surface. Droplets can achieve a uniformly dispersed water distribution effect on the surface of the sphere. At the same time, ceramsite itself also has a certain pore structure, which can fix part of the water inside the ceramsite. The water on the surface of ceramsite can form a microbial film under the action of air, which is conducive to rapid degradation by microorganisms. The droplets first contact the shell layer inside the filter material. The shell contains rich calcium elements, which has a good effect on the removal of total phosphorus in sewage. In addition, due to its proximity to the surface, the exchange contact conditions between sewage and air are relatively good, and the dissolved oxygen concentration in sewage is also relatively high, which is conducive to the absorption and decomposition of phosphorus pollutants by aerobic bacteria. After the sewage is filtered through the shell layer to remove certain phosphorus pollutants, it enters the rock wool layer. The rock wool layer uses hydrophilic agricultural rock wool as the filler, which can absorb part of the water and increase the residence time of sewage in the filler. At the same time, rock wool has pores, which are suitable for microbial growth, and enhance the contact time between microorganisms and sewage and the absorption and treatment effect. The ceramsite layer is set under the rock wool layer. Its main purpose is to provide air circulation pores for the oxygenation tank to prevent the rock wool from blocking the pores of the oxygenation tank after holding water. It can also ensure that there is enough gas-liquid exchange time between the droplets and the air. After oxygenation, the sewage finally enters the volcanic rock layer. The volcanic rock has a large pore structure, which can deeply intercept the sludge generated in the upper sewage treatment and ensure that the suspended solids index of the effluent meets the standard limit.

[0015] In the sewage treatment device of the present application, the first expanded clay layer in the water filter tank is connected to the water collecting tank. The sewage enters the water collecting tank after being filtered through the filter material layer, and is sent into the filter material layer again by the circulating water distribution component for circulating filtration. The water collecting tank is also connected to the volcanic rock layer. Therefore, there is a very small part of the sewage that directly enters the volcanic rock layer and then enters the effluent sampling unit after being filtered once, but most of the sewage is circulated and filtered and mixed with the uncirculated filtered part after filtration. The uncirculated filtered part is diluted by a large amount of circulating filtered water, which will not affect the overall effluent water quality.

[0016] Optionally, the expanded clay component of the two expanded clay layers accounts for 20% to 30% of the filler, the shell component accounts for 10% to 40% of the filler, the rock wool component accounts for 30% to 40% of the filler, and the volcanic rock component accounts for 10% to 20% of the filler.

[0017] Optionally, the air diffusion groove is an arched groove and is arranged in the first ceramsite layer; the arched groove is provided with air diffusion holes. The air diffusion holes allow air to circulate and diffuse, and self-oxygenation is achieved in the filter material layer under the action of the air extraction pipe.

[0018] Optionally, the water pump is a DC water pump and is equipped with a storage power supply. For example, a 12V or 24V DC voltage product can be used, which is suitable for the current situation of rural sewage treatment.

[0019] Optionally, the water distributor includes a water distribution pipe and a plurality of water distribution nozzles distributed on the water distribution pipe.

[0020] Optionally, the water distribution nozzle is a spiral nozzle.

[0021] Optionally, the water distribution pipe is connected to the spiral nozzle through a threaded interface; Optionally, the spiral nozzle is in the shape of a hollow spiral blade. Sewage flows out through the threaded interface, and water droplets fall onto the spiral nozzle blades, spread around the blades, form fine water droplets, and then enter the filtration treatment system. The atomized droplets increase the contact surface with the air to enhance the purification effect.

[0022] Optionally, the spiral nozzle is made of UPVC, ABS, brass or stainless steel, and has an inner diameter of 1.0 mm-15.0 mm.

[0023] Optionally, the oxygenation assembly further comprises an oxygenation mechanism powered by solar energy, wherein the oxygenation mechanism comprises:

[0024] Solar panels;

[0025] The DC fan is installed at the top outlet of the corresponding air extraction duct and is connected to the power output end of the solar panel.

[0026] The DC fan is started after the output voltage of the solar panel reaches the set voltage, and increases the dissolved oxygen inside the sewage treatment system and enhances the sewage treatment efficiency by promoting the flow of air and gas-liquid exchange in the sewage treatment system.

[0027] Optionally, the oxygen enrichment mechanism further includes a solar energy storage device; the power output end of the solar panel is connected to the input end of the solar energy storage device through an electrical pipeline, and the output end of the solar energy storage device is connected to the input end of the DC fan through an electrical pipeline. On the one hand, the stability of the device is enhanced, and on the other hand, the excess electricity is stored in the solar energy storage device, which can power the DC fan in rainy weather.

[0028] Optionally, the water pump is a DC water pump and is connected to the solar panel or the solar energy storage device.

[0029] This application adopts the optimization scheme of solar energy oxygenation. Without access to the high-voltage power system of the city electricity, it only relies on the oxygenation effect of solar energy to increase the dissolved oxygen in the sewage inside the filter bed, and realizes the combination of multi-stage aerobic, anoxic and anaerobic treatment units in the vertical and horizontal directions, enhancing the sewage treatment efficiency, and does not require operation and maintenance personnel to maintain the system. In addition, the internal electrical equipment of the system only requires a low-voltage DC water pump, which reduces the complexity of the sewage treatment system, improves the sewage treatment efficiency, and ensures the long-term stable performance of the rural sewage treatment system.

[0030] Optionally, the effluent sampling unit includes a water storage tank, and the water inlet of the water storage tank is connected to the drain outlet of the water filtration tank through a pipeline, so as to facilitate sampling and testing of the effluent water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a composition diagram of the unit of the utility model;

[0032] Figure 2 It is a schematic diagram of the specific structure of the utility model;

[0033] Figure 3 Schematic diagram of an oxygen enrichment mechanism powered by solar energy.

[0034] The reference numerals shown in the figures are as follows:

[0035] 1. Grid adjustment unit: 101, grid pool, 102, coarse grid, 103, fine grid;

[0036] 2. Circulation filtration unit: 201. Water filtration pool, 202. Water collection pool, 203. Volcanic rock layer, 204. First ceramsite layer, 205. Rock wool layer, 206. Shell layer, 207. Second ceramsite layer, 208. Air diffusion slot, 209. Air extraction pipe, 210. Water pump, 211. Water distribution pipe, 212. Water distribution nozzle, 213. Water inlet of water distribution pipe, 214. Drainage outlet of water filtration pool, 215. DC fan, 216. Solar energy storage device, 217. Solar panel, 218. Water-blocking geomembrane;

[0037] 3. Effluent sampling unit, 301, water storage tank. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] In order to better describe and illustrate the embodiments of the present application, reference may be made to one or more drawings, but the additional details or examples used to describe the drawings should not be considered as limiting the scope of the invention of the present application, any of the currently described embodiments or preferred methods.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0041] like Figure 1 As shown, a circulating filtration rural sewage treatment device comprises a grille adjustment unit 1, a circulating filtration unit 2 and an effluent sampling unit 3 which are arranged in sequence.

[0042] like Figure 2 As shown, the screen regulating unit 1 includes a screen pool 101, in which a coarse screen 102 and a fine screen 103 are sequentially arranged along the water flow direction to intercept suspended matter in the sewage. Specifically, the tank body of the screen regulating unit can be a circular or square pool, and the sewage is connected through the sewage inlet of the pool, and the sewage pre-treated by the coarse screen and the fine screen sequentially flows into the circulation filtration unit by gravity.

[0043] like Figure 2 As shown, the circulating filtration unit 2 includes a tank body, a filtration component, an oxygenation component and a circulating water distribution component. The tank body includes a water filtration tank 201 and a water collection tank 202 which are interconnected; the filtration component includes a plurality of filter material layers which are layered in the water filtration tank 201; the oxygenation component includes an air diffusion slot 208 and an air extraction pipe 209 which are arranged in the filter material layer, the air diffusion slot 208 is arranged horizontally and is connected to the outside air, and the air extraction pipes 209 are arranged vertically, the bottom of each air extraction pipe is connected to the air diffusion slot, and the top of each air extraction pipe extends out of the filter material layer and is connected to the outside ambient air; the circulating water distribution component includes a water pump 210 which is arranged in the water collection tank 202, a water distribution pipe 211 which is arranged above the water filtration tank, and a plurality of water distribution nozzles 212 which are distributed on the water distribution pipe, and the water outlet of the water pump 210 and the water outlet of the grille adjustment unit 1 are connected to the water inlet 213 of the water distribution pipe.

[0044] The pool body of the circulating filtration unit includes a water filtration pool and a water collection pool. The water collection pool can be a circular or square pool, which is connected to the water filtration pool through a pipeline. The effluent after filtration in the water filtration pool enters the water collection pool and is redistributed in the water filtration pool by the circulating water distribution component. The water filtration pool is the main place for sewage filtration and purification. The filter material layer is arranged in the water filtration pool. As an embodiment of the filter material layer, the filter material layer includes a volcanic rock layer 203, a first ceramsite layer 204, a rock wool layer 205, a shell layer 206 and a second ceramsite layer 207 filled from bottom to top in sequence. A water-proof geomembrane 218 is arranged between the volcanic rock layer 203 and the first ceramsite layer 204. The first ceramsite layer 204 has a water outlet connected to the water collection pool 202, the water collection pool 202 has a water outlet connected to the volcanic rock layer 203, the volcanic rock layer 203 has a water outlet connected to the water sampling unit 3, and the water outlet of the volcanic rock layer 203 is used as the drain 214 of the water filtration pool. The water-proof geomembrane adopts a waterproof membrane to prevent the wastewater from falling directly into the volcanic rock layer. The wastewater treated by the first expanded clay layer is discharged into the water collection pool 202 through the outlet of the layer, and the water is circulated by the water pump. The purified water after circulating filtration enters the volcanic rock layer and finally enters the water sampling unit 3 through the drain outlet 214 of the water filtration pool.

[0045] The ceramsite component of the two ceramsite layers accounts for 20% to 30% of the filler, the shell component accounts for 10% to 40% of the filler, the rock wool component accounts for 30% to 40% of the filler, and the volcanic rock component accounts for 10% to 20% of the filler. The specific proportion can be adjusted within this range according to the actual situation, and the selection of materials for each layer of filler can refer to the conventional settings of the same type of filter pool.

[0046] The oxygenation assembly is arranged above the water-proof geomembrane 218 in the filter material layer, the air diffusion slot 208 is an arched slot and is horizontally arranged in the first ceramsite layer 203, and air diffusion holes are evenly distributed on the arched slot to facilitate air circulation and diffusion. The air diffusion slot is connected to the ambient air outside the water filter tank through a gas pipeline, and the air extraction pipe 209 is vertically inserted into the filter material layer, the bottom is connected to the air diffusion slot, and the top extends out of the second ceramsite layer 207 and is connected to the ambient air, and self-oxygenation in the filter material layer is achieved under the action of the air extraction pipe. Multiple air extraction pipes are spaced apart on each air diffusion slot, and multiple air diffusion slots can also be arranged in parallel according to needs.

[0047] The circulating water distribution component includes a water pump 210, a water distribution pipe 211 and a water distribution nozzle 212. The water pump 210 can be a DC water pump and equipped with a storage power supply. For example, a 12V or 24V DC voltage product can be used, which is suitable for the current situation of rural sewage treatment.

[0048] The water distribution pipe 211 is arranged above the filter material layer (the second ceramsite layer), and the water distribution nozzles 212 are evenly distributed on the water distribution pipe 211. The water distribution nozzles 212 can adopt spiral nozzles. The water distribution pipe is connected to the spiral nozzle through a threaded interface; the spiral nozzle is in the shape of a hollow spiral blade. The sewage flows out through the threaded interface, and the water droplets fall onto the spiral nozzle blades, spread around the blades, form fine water droplets, and then enter the filtration treatment system. The atomized droplets increase the contact surface with the air to enhance the purification effect. The spiral nozzle is made of UPVC, ABS, brass or stainless steel, and the inner diameter size is 1.0mm-15.0mm.

[0049] The above-mentioned oxygenation component can achieve self-oxygenation in the filter layer under the action of the air extraction duct. In a further preferred scheme, an oxygenation mechanism can be set at the outlet of the air extraction duct to further enhance the oxygenation efficiency of the filter layer. In order to further reduce energy consumption and make full use of the rural environment, the oxygenation mechanism can use solar energy as energy.

[0050] like Figure 3 The solar energy enhanced oxygenation device includes a DC fan 215, a solar energy storage device 216 and a solar panel 217. The DC fan 215 is installed at the top outlet of the air extraction pipe (see Figure 2 ), the solar panel 217 leads to the positive and negative power supply interfaces, which are connected to the input end of the solar energy storage device 216 to charge the solar energy storage device. The input end of the DC fan 215 is connected to the output end of the solar energy storage device 216 through an electrical conduit. The oxygenation fan uses solar energy to drive the DC fan, promote the flow of air in the oxygenation component, and exchange gas and liquid with the droplets in the water filter tank, increase the dissolved oxygen in the sewage treatment system, and enhance the sewage treatment efficiency. The solar energy storage device can directly use commercially available portable solar energy storage equipment.

[0051] In the solution of adding solar-enhanced oxygenation, the water pump 210 can also be connected to the solar energy storage device 216 and powered by solar panels.

[0052] like Figure 2 As shown, the effluent sampling unit 3 includes a water storage tank 301, which can be a circular or square water tank. The water inlet of the water storage tank is connected to the drain outlet 214 of the water filter tank through a pipeline, which is convenient for sampling and testing the effluent water quality.

[0053] Example 1

[0054] A coarse grid 102 and a fine grid 103 are installed inside the grid adjustment unit 1. The coarse grid is made of stainless steel and welded, with 2mm steel bars and a gap of 20mm; the fine grid is made of stainless steel and welded, with 2mm steel bars and a gap of 10mm. After the sewage is treated by the coarse and fine grids, oil residue, floating mud, garbage, vegetable leaves, etc. in the sewage will be intercepted in the grid adjustment unit. The pretreated sewage flows into the water distribution pipe by gravity and then enters the circulation filter unit 2.

[0055] Under the action of the spiral nozzle, the sewage forms micro droplets, which are evenly sprinkled on the surface of the filter material and gradually infiltrate into the lower filter material. During the droplet falling process, the wind impeller 215 is started by using wind and solar energy, which drives the fan impeller to rotate and suck air, so that the air in the air diffusion groove 208 begins to flow. Part of the air enters the filter material layer during the suction process, and forms a gas-liquid exchange reaction with the descending droplets to replenish dissolved oxygen for the droplets. The sewage with increased dissolved oxygen enters the water collection pool 202 of the circulation treatment system, and after being lifted by the DC water pump, it enters the water distribution pipeline 211 for filtering again. After multiple filtrations, the sewage continues to gather, and under the action of gravity, it enters the volcanic rock filler layer, and finally is discharged into the water outlet sampling unit 3 through the water outlet 214 of the water filter pool. The water outlet sampling unit has the function of collecting water, which is convenient for water quality sampling. The external pipeline is connected to the surrounding environment for discharge, and can also be used as a water resource for secondary use.

[0056] In this embodiment, the packing arrangement uses ceramsite as the top filter material, mainly based on the dispersion and water distribution performance of the droplets. The ceramsite itself is a spherical shape with a smooth surface. The droplets can achieve a uniformly dispersed water distribution effect on the surface of the sphere. At the same time, the ceramsite itself also has a certain pore structure, which can fix part of the water inside the ceramsite. The surface moisture of the ceramsite can form a microbial film under the action of air, which is conducive to rapid degradation by microorganisms. The droplets are inside the filter material and first contact with the shell layer. The shell contains rich calcium elements, which has a good effect on the removal of total phosphorus in sewage. In addition, due to its proximity to the surface, the exchange contact conditions between sewage and air are relatively good, and the dissolved oxygen concentration in the sewage is also relatively high, which is conducive to the absorption and decomposition of phosphorus pollutants by aerobic bacteria. After the sewage is filtered through the shell layer to remove certain phosphorus pollutants, it enters the rock wool layer. The rock wool layer uses hydrophilic agricultural rock wool as the filler, which can absorb part of the water and increase the residence time of sewage in the filler. At the same time, the rock wool has pores, which are suitable for microbial growth, and strengthen the contact time and absorption treatment effect of microorganisms and sewage. The ceramsite layer is set under the rock wool layer. Its main purpose is to provide air circulation pores for the oxygenation tank to prevent the rock wool from blocking the pores of the oxygenation tank after holding water. It can also ensure that there is enough gas-liquid exchange time between the droplets and the air. After oxygenation, the sewage finally enters the volcanic rock layer. The volcanic rock has a large pore structure, which can deeply intercept the sludge generated in the upper sewage treatment and ensure that the suspended solids index of the effluent meets the standard limit.

[0057] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A circulating filtration rural sewage treatment device, characterized in that: It includes a grid adjustment unit, a circulation filtering unit and a water outlet sampling unit which are arranged in sequence; the circulation filtering unit includes: A pool body, comprising a water filtering pool and a water collecting pool which are interconnected; A filter assembly, comprising a plurality of filter material layers arranged in layers in the water filter tank; The oxygenation component includes an air diffusion groove and an air extraction pipe arranged in the filter material layer, wherein the air diffusion groove is arranged horizontally and communicated with the external air, the air extraction pipe is arranged vertically and its bottom is communicated with the air diffusion groove, and the top of the air extraction pipe extends out of the filter material layer and communicated with the external ambient air; The circulating water distribution assembly comprises a water pump arranged in the water collection pool and a water distributor arranged above the water filtration pool, and the water outlet of the water pump and the water outlet of the grille adjustment unit are both connected to the water inlet of the water distributor.

2. The rural sewage treatment device according to claim 1, characterized in that: The filter material layer includes a volcanic rock layer, a first ceramsite layer, a rock wool layer, a shell layer and a second ceramsite layer filled in sequence from bottom to top, and a water-proof geomembrane is arranged between the volcanic rock layer and the ceramsite layer; the first ceramsite layer has a water outlet connected to a water collection pool, the water collection pool has a water outlet connected to the volcanic rock layer, and the volcanic rock layer has a water outlet connected to a water sampling unit.

3. The rural sewage treatment device according to claim 2, characterized in that: The air diffusion groove is an arched groove and is arranged in the first ceramsite layer; air diffusion holes are distributed on the arched groove.

4. The rural sewage treatment device according to claim 1, characterized in that: The water pump is a DC water pump and is equipped with a storage power supply.

5. The rural sewage treatment device according to claim 1, characterized in that: The water distributor comprises a water distribution pipeline and a plurality of water distribution nozzles distributed on the water distribution pipeline.

6. The rural sewage treatment device according to claim 5, characterized in that: The water distribution nozzle is a spiral nozzle.

7. The rural sewage treatment device according to claim 1, characterized in that: The oxygenation assembly also includes a solar-powered oxygenation mechanism, which includes: Solar panels; The DC fan is installed at the top outlet of the corresponding air extraction duct and is connected to the power output end of the solar panel.

8. The rural sewage treatment device according to claim 7, characterized in that: The oxygen enrichment mechanism also includes a solar energy storage device; the power output end of the solar panel is connected to the input end of the solar energy storage device through an electrical pipeline, and the output end of the solar energy storage device is connected to the input end of the DC fan through an electrical pipeline.

9. The rural sewage treatment device according to claim 8, characterized in that: The water pump is a DC water pump and is connected to the solar panel or the solar energy storage device.

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