A non-energy consumption rural domestic sewage treatment device

Abstract

The application provides a kind of non-energy consumption rural domestic sewage treatment equipment, belongs to sewage treatment technical field. Including filter grit chamber, anaerobic tank, oxygen tank and sewage collection pipeline arranged in the oxygen tank in turn along the water flow direction;The application uses the same pipe for the waterway of water pipe and the gas path of U-shaped aeration pipe, drives the fan to rotate by natural wind to produce negative pressure around the air outlet pipe, makes external air enter into U-shaped aeration pipe through air inlet pipe, and sprays into water body through the spray hole of U-shaped aeration pipe side wall, and then promotes aeration, realizes non-powered aeration and oxygenation, solves the problem that the existing rural domestic sewage treatment becomes a sun-drying project due to high operation cost, and has important significance for promoting rural green and sustainable development.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sewage treatment, and specifically relates to a non-energy-consumption rural domestic sewage treatment equipment. BACKGROUND

[0002] With the improvement of living standards and the change of rural lifestyle in rural areas of China, the amount of rural domestic sewage is also increasing.

[0003] The anaerobic digestion-oxygen oxidation treatment process is an effective method for treating rural sewage. However, rural domestic sewage has the characteristics of small water quantity, scattered discharge, intermittence and good biodegradability, so that the use of traditional treatment process has a series of problems such as high operation cost and unstable operation, resulting in that most of the existing rural sewage treatment projects become sunning projects, which not only does not solve the present situation of rural wastewater pollution environment, but also causes waste of resources. Therefore, it is urgent to develop new rural sewage treatment equipment and process with simple process, low construction and operation cost and easy management and maintenance according to the water quantity and distribution of rural domestic sewage. SUMMARY

[0004] In view of the above problems, the application provides a non-energy-consumption rural domestic sewage treatment equipment.

[0005] The technical scheme of the application is: a non-energy-consumption rural domestic sewage treatment equipment, comprising a filter grit chamber, an anaerobic tank, an aerobic tank and an aeration pipe assembly and a sewage collection pipe arranged in the aerobic tank in sequence along the water flow direction.

[0006] The upper end of the anaerobic tank is provided with an air outlet pipe, and a support mounting bracket is arranged at the upper end of the anaerobic tank; a rotating fan is connected to the center of the support mounting bracket through a lossless rotating shaft.

[0007] The aerobic tank is provided with a first fixed filler frame, and the upper end of the aerobic tank is provided with an air inlet pipe; the aeration pipe assembly comprises a U-shaped aeration pipe arranged in the aerobic tank and a horizontal aeration pipe connected to one end of the U-shaped aeration pipe; the horizontal aeration pipe and the U-shaped aeration pipe are both provided with a plurality of jet holes; and the bottom end of the anaerobic tank is communicated with the horizontal aeration pipe through a water passage.

[0008] The sewage collection pipe comprises a plurality of sewage collection branch pipes for collecting domestic sewage of each household and a collection pipe for connecting each sewage collection branch pipe; and the collection pipe is connected with the filter grit chamber.

[0009] Further, the filter grit tank is provided with a grit filter assembly, which comprises pulse grit pipes arranged inside the filter grit tank and distributed in the horizontal direction, a plurality of cleaning valves arranged at the bottom end of the pulse grit pipes, a falling material cleaning box arranged inside the filter grit tank and located at the bottom end of the pulse grit pipes, and an opening and closing cover plate arranged on the side wall of the filter grit tank.

[0010] Description: When the sewage flows into the filter grit tank through the collecting pipeline, it enters the pulse grit pipe, which can prolong the flow path of the sewage and provide more time for the suspended matter to settle, thereby improving the settling efficiency without significantly increasing the size of the filter grit tank. The settled sediment falls into the falling material cleaning box through each cleaning valve. When the falling material cleaning box needs to be cleaned, the opening and closing cover plate is opened, and the falling material cleaning box is pulled out. The grit filter assembly can effectively improve the grit setting effect during the sewage treatment process and facilitate cleaning, thereby improving the efficiency and environmental friendliness of the entire sewage treatment system.

[0011] Further, the pulse grit pipe is connected by a plurality of grit sub-pipes, and the cleaning valve corresponds to the grit sub-pipe and is arranged at the lower end of the grit sub-pipe. The filter grit tank is provided with a horizontal limiting frame, and the horizontal limiting frame is provided with a limiting opening located on the outer wall of the grit sub-pipe.

[0012] Description: Compared with the overall structure, the pulse grit pipe is arranged in the form of a plurality of grit sub-pipes connected, which can be replaced or repaired individually, increasing the convenience of installation and disassembly. The outer wall of each grit sub-pipe is limited by the limiting opening on the horizontal limiting frame, improving the installation stability.

[0013] Further, the height between the upper end of the gas outlet pipe and the upper end of the anaerobic tank is 2-4m.

[0014] Description: By limiting the height between the upper end of the gas outlet pipe and the upper end of the anaerobic tank, it is avoided that the oxygen concentration is not enough due to the too low height of the upper end of the gas outlet pipe, which reduces the sewage treatment effect, and it is avoided that the gas flows too fast due to the too high height of the upper end of the gas outlet pipe, which is not conducive to the growth of microorganisms attached to the filler surface.

[0015] Further, the components of the filler in the first fixed filler frame include 10-15g of zirconium oxide, 25-30g of aluminum oxide, 5-8g of glass powder, 5-10g of sodium metasilicate, 3-5g of alginate, and 1-3g of polyethylene glycol.

[0016] Description: The filler prepared by using the above raw materials has high specific surface area of zirconium oxide and aluminum oxide, which helps to provide more reactive sites and improve the reaction efficiency, and has good mechanical strength, which makes the filler perform well in physical impact and wear, and the alginate and polyethylene glycol can improve the hydrophilicity and biocompatibility of the filler, and improve the biofilm formation capacity of the filler in the bioreactor, because many microorganisms prefer to grow on hydrophilic surfaces.

[0017] Further, the effluent side of the aerobic tank is connected with a horizontal subsurface flow tank, and the horizontal subsurface flow tank is planted with hydroponic plants.

[0018] Description: When the water body treated by the aerobic treatment passes through the horizontal subsurface flow tank, the roots of the plants can transport oxygen to the water body, help to improve the dissolved oxygen level in the water body, provide a surface for microorganisms to adhere to, and help to form a biofilm, which helps to further degrade organic matter in the sewage and enhance the removal efficiency of the whole system for pollutants, including organic matter, heavy metals and pathogens.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] (1) According to the characteristics of rural domestic sewage, such as small water quantity, scattered discharge, intermittence and good biodegradability, the waterway of the water pipe and the gas path of the U-shaped aeration pipe are adopted in the same pipe, which ensures that the sewage meets the standard treatment and reduces the investment of equipment.

[0021] (2) The present application drives the fan to rotate by natural wind to produce negative pressure around the air outlet pipe, so that the external air enters the U-shaped aeration pipe through the air inlet pipe, and is sprayed into the water body through the spray holes in the side wall of the U-shaped aeration pipe, thereby promoting aeration, realizing non-powered aeration and oxygenation, and realizing zero-cost operation of the whole process by using the gravity difference between the wastewater discharge port and the treatment equipment, which solves the problem that the existing rural domestic sewage treatment becomes a sunning project due to high operation cost, and has important significance for promoting green and sustainable development in rural areas.

[0022] (3) The zirconium oxide and aluminum oxide in the filler have high specific surface area, which helps to provide more reactive sites and improve the reaction efficiency, and also have good mechanical strength, so that they have excellent physical impact resistance and wear resistance, and in addition, the alginate and polyethylene glycol can improve the hydrophilicity and biocompatibility of the filler, and improve the biofilm formation capacity and moisture retention capacity of the filler in the bioreactor, which improves the process operation stability and further significantly reduces the equipment and process maintenance frequency. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the first overall structure schematic diagram of the present application;

[0024] Figure 2 is a schematic diagram of the flow direction of the gas in the present application; Figure 1

[0025] Figure 3 is a schematic diagram of the flow direction of the gas in the present application; Figure 1

[0026] Figure 4 is a schematic diagram of the flow direction of the gas in the present application;

[0027] Figure 5

[0028] Figure 6

[0029] Figure 7

[0030] Figure 8 is a schematic diagram of the flow direction of the gas in the present application;

[0031] Figure 9

[0032] Figure 10

[0033] Figure 11 is a schematic diagram of the flow direction of the gas in the present application;

[0034] Figure 12 is a schematic diagram of the flow direction of the gas in the present application; Figure 11

[0035] Figure 13 is a schematic diagram of the flow direction of the gas in the present application. Figure 11

[0036] ​​​​​​​​​Wherein, 1 - filter grit chamber, 10 - grit filter assembly, 100 - pulse grit pipe, 101 - cleaning valve, 102 - material cleaning box, 103 - open and close cover plate, 104 - grit sub-pipe, 11 - horizontal limit frame, 12 - limit port, 2 - anaerobic tank, 20 - floating filler assembly, 200 - hollow cross ring, 201 - floating filler ball, 202 - forward liquid outlet pipe, 203 - reverse liquid outlet pipe, 204 - porous filler ball, 205 - nylon reinforced mesh cover, 21 - second fixed filler frame, 22 - liquid distribution disc, 220 - forward through pipe, 221 - first filter screen, 222 - reverse through pipe, 223 - second filter screen, 23 - air outlet pipe, 24 - support mounting frame, 240 - lossless rotating shaft, 241 - rotating fan, 25 - water pipe, 3 - aerobic tank, 30 - first fixed filler frame, 31 - air inlet pipe, 32 - horizontal subsurface flow tank, 4 - aeration pipe assembly, 40 - U-shaped aeration pipe, 41 - horizontal aeration pipe, 42 - compensation aeration pipe, 43 - air compressor, 44 - injection hole, 5 - solar power assembly, 5 - sewage collection pipeline, 50 - sewage collection branch pipe, 51 - collection pipeline, 6 - mounting frame, 70 - solar cell panel, 71 - battery pack, 72 - inverter. DETAILED DESCRIPTION

[0037] In order to further understand the content of the present application, the following will be described in detail by examples.

[0038] Example 1

[0039] As shown in Figure 1 , 2 , 3, a kind of non-energy consumption rural domestic sewage treatment equipment, including filter grit chamber 1, anaerobic tank 2, aerobic tank 3 in turn along the direction of water flow Distribution and be located in the aerobic tank 3 of aeration pipe assembly 4 and sewage collection pipeline 5;

[0040] Anaerobic tank 2 upper end is equipped with air outlet pipe 23, anaerobic tank 2 upper and located at the upper end of air outlet pipe 23 is equipped with support mounting frame 24, support mounting frame 24 center is connected with rotating fan 241 by lossless rotating shaft 240, the height between the upper end of air outlet pipe 23 and the upper end of anaerobic tank 2 is 2 m, wherein, lossless rotating shaft 240 and rotating fan 241 are all using prior art;

[0041] The first fixed filler frame 30 in the aerobic tank 3 is provided with a filler, and the components of the filler include 10g of zirconium oxide, 25g of aluminum oxide, 5g of glass powder, 5g of sodium metasilicate, 3g of alginate, and 1g of polyethylene glycol.

[0042] The sewage collection pipeline 5 includes 15 sewage collection branch pipes 50 for collecting domestic sewage of each farmer, and a collection pipeline 51 for connecting the sewage collection branch pipes 50.

[0043] Embodiment 2

[0044] The difference between this embodiment and embodiment 1 is that:

[0045] The height between the upper end of the outlet pipe 23 and the upper end of the anaerobic tank 2 is 4m.

[0046] The components of the filler in the first fixed filler frame 30 include 15g of zirconium oxide, 30g of aluminum oxide, 8g of glass powder, 10g of sodium metasilicate, 5g of alginate, and 3g of polyethylene glycol.

[0047] The use method of the energy-saving rural domestic sewage treatment device in this embodiment includes the following steps:

[0048] S1, collect the sewage of the user through each sewage collection branch pipe 50, and collect the sewage into the filter grit chamber 1 through the collection pipeline 51, filter and treat the sewage in the filter grit chamber 1, and then the treated water enters the anaerobic tank 2.

[0049] S2, the water is treated by the anaerobic tank 2, and the water treated by the anaerobic tank 2 is overflowed into the aerobic tank 3 through the water pipe 25 and one length of the horizontal aeration pipe 41 for aerobic treatment, which can remove organic matter, nitrogen and phosphorus, and heavy metals in the water, and the water is discharged after the aerobic treatment.

[0050] S3, in the process of anaerobic treatment, the biogas produced overflowed from the bottom end of the gas outlet pipe 23, and under the action of natural wind from the upper end of the gas outlet pipe 23, the rotating fan 241 was driven to rotate, and negative pressure suction was generated by the rotation of the rotating fan 241, so that the gas outlet pipe 23 formed a negative pressure. At this time, the external air entered the U-shaped aeration pipe 40 through the air inlet pipe 31, and was sprayed into the water body through the spray holes 44 in the side wall of the U-shaped aeration pipe 40, thereby promoting aeration. Rural sewage has the characteristics of small sewage quantity and intermittent inflow, so the water in the horizontal aeration pipe 41 is basically not in the full pipe state. In order to save pipes, the waterway and the airway share the horizontal aeration pipe 41, and the residual air in the U-shaped aeration pipe 40 flows out through the upper end of the horizontal aeration pipe 41 and the gas outlet pipe 23.

[0051] Example 3

[0052] The difference between this embodiment and example 2 is:

[0053] As shown in Figure 4 、 5 , 6, 7, the filter grit tank 1 is provided with a grit filter assembly 10, the grit filter assembly 10 includes a pulse grit pipe 100 arranged inside the filter grit tank 1 and distributed in the horizontal direction, three cleaning valves 101 arranged at the bottom end of the pulse grit pipe 100, a falling material cleaning box 102 arranged inside the filter grit tank 1 and located at the bottom end of the pulse grit pipe 100, and an opening and closing cover plate 103 arranged on the side wall of the filter grit tank 1. When the sewage flows into the filter grit tank 1 through the collecting pipe 51, it will enter the pulse grit pipe 100, and the pulse grit pipe 100 can prolong the flow path of the sewage, providing more time for the suspended solids to settle. The settling efficiency can be improved without significantly increasing the size of the filter grit tank 1. The settled sediment falls into the falling material cleaning box 102 through each cleaning valve 101. When the falling material cleaning box 102 needs to be cleaned, the opening and closing cover plate 103 is opened, and the falling material cleaning box 102 is pulled out. This grit filter assembly 10 can effectively improve the gritting effect in the sewage treatment process and facilitate cleaning, thereby improving the efficiency and environmental friendliness of the entire sewage treatment system. The cleaning valve 101 and the opening and closing cover plate 103 both use existing technology.

[0054] The pulse grit pipe 100 is connected through by three grit sub-pipes 104, and the cleaning valve 101 is corresponded to the grit sub-pipe 104 and arranged at the lower end of the grit sub-pipe 104, the filter grit pool 1 is internally provided with a horizontal limiting frame 11, the horizontal limiting frame 11 is internally provided with a limiting opening 12 located at the outer wall of the grit sub-pipe 104, compared with the overall structure, the pulse grit pipe 100 is arranged in the mode of several grit sub-pipes 104 connection, which can be individually replaced or repaired, and the convenience of installation and disassembly is increased, the outer wall of each grit sub-pipe 104 is limited through the limiting opening 12 on the horizontal limiting frame 11, and the installation stability is improved, wherein one of flange connection, threaded connection or clamp connection can be used between the two adjacent grit sub-pipes 104;

[0055] The horizontal subsurface flow pool 32 is connected to the effluent side of the aerobic tank 3, and aquatic plants are planted in the horizontal subsurface flow pool 32, the aquatic plants are reed, cattail, water chives and canna, when the water body treated by the aerobic treatment passes through the horizontal subsurface flow pool 32, the root system of the plants can transport oxygen to the water body, helping to improve the dissolved oxygen level in the water body, providing a surface for the microorganisms to adhere, and helping to form a biological membrane, which helps to further degrade the organic matter in the sewage, and enhances the removal efficiency of the entire system on the pollutants, including organic matter, heavy metals and pathogens.

[0056] Example 4

[0057] The difference between the present embodiment and example 3 is that:

[0058] As shown in Figure 8 , 9 , the second fixed filler frame 21 is arranged in the anaerobic tank 2, the filler component of the second fixed filler frame 21 is the same as that of the first fixed filler frame 30, the floating filler assembly 20 is arranged at the upper end in the anaerobic tank 2, the floating filler assembly 20 comprises two hollow cross rings 200 communicated in sequence from left to right, and ten floating filler balls 201 arranged in the hollow cross rings 200, the anaerobic tank 2 is connected with the side wall of the anaerobic tank 2 through the connecting pipe, and the connecting part is provided with the liquid distribution disc 22, the liquid distribution disc 22 is connected with the hollow cross ring 200 at the left end through the forward through pipe 220, and the connecting part is provided with the first filter screen 221, and the hollow cross ring 200 at the right end is provided with the forward liquid outlet pipe 202, the first filter screen 221 is a detachable structure, and the prior art is adopted;

[0059] The liquid distribution disc 22 is connected with the hollow cross ring 200 at the right end through the reverse through pipe 222, and the connecting part is provided with the second filter screen 223, and the hollow cross ring 200 at the left end is provided with the reverse liquid outlet pipe 203, the second filter screen 223 is a detachable structure, and the prior art is adopted;

[0060] The floating filler ball 201 comprises a porous filler ball 204, a nylon reinforced mesh sleeve 205 sleeved on the outer wall of the porous filler ball 204, and the filler component of the porous filler ball 204 is the same as that of the first fixed filler frame 30. The nylon reinforced mesh sleeve 205 adopts the prior art. When the sewage is subjected to anaerobic treatment, the water body flows into the distribution disc 22 from the pulse grit pipe 100, flows into the left first hollow cross ring 200 through the forward through pipe 220, and is impacted by the water flow in the hollow cross ring 200, so that the water body is subjected to the first anaerobic treatment by the anaerobic microorganisms in the floating filler ball 201. Then, under the action of the impact force of the water flow, the water body sequentially passes through each hollow cross ring 200 to complete multiple anaerobic treatments. Finally, the water body flows out through the forward liquid outlet pipe 202 and falls onto the second fixed filler frame 21 to be subjected to the second anaerobic treatment. Finally, the water body overflows through the water pipe 25. When the sewage is subjected to anaerobic treatment again, in order to balance the position of the porous filler ball 204 and avoid the excessive concentration of the porous filler ball 204 in a certain position in the hollow cross ring 200, the water body flows into the right first hollow cross ring 200 through the reverse through pipe 222 after flowing into the distribution disc 22 from the pulse grit pipe 100, so that the water flow is impacted in the reverse direction and subjected to anaerobic treatment. Through the combination of the floating porous filler ball 204 and the second fixed filler frame 21, the sewage is subjected to combined anaerobic treatment, and the anaerobic treatment effect is greatly improved.

[0061] Example 5

[0062] The difference between this embodiment and example 4 is that:

[0063] As shown in Figure 11 , 12 , 13, the aeration pipe assembly 4 further comprises a compensation aeration pipe 42 connected with the horizontal aeration pipe 41 and extending to the outside of the aerobic tank 3, and an air compressor 43 connected with the compensation aeration pipe 42, wherein the air compressor 43 adopts the prior art.

[0064] Further comprising a solar power assembly 7, the solar power assembly 7 comprises a solar cell panel 70, a battery pack 71 connected with the solar cell panel 70, and an inverter 72 connected with the battery pack 71. The filter grit tank 1, the anaerobic tank 2, and the aerobic tank 3 are all provided with a mounting bracket 6 at the upper end, the solar cell panel 70 is arranged on the upper end of the mounting bracket 6, and the battery pack 71 is electrically connected with the air compressor 43. The solar cell panel 70, the battery pack 71, and the inverter 72 all adopt the prior art.

[0065] The use method of the energy consumption-free rural domestic sewage treatment equipment according to the embodiment comprises the following steps:

[0066] S1, sewage of users is collected through each sewage collecting branch pipe 50 respectively, and is collected through the collecting pipe 51 and flows into the filter grit chamber 1, at this time, the sewage enters the pulse grit pipe 100, the pulse grit pipe 100 can prolong the flow path of the sewage, and more time is provided for the suspended matter to settle, and the settled sediment falls into the material cleaning box 102 through each cleaning valve 101, when the material cleaning box 102 needs to be cleaned, the opening and closing cover plate 103 is opened, the material cleaning box 102 is extracted, and the treated water body enters the anaerobic tank 2;

[0067] S2, the water body is treated by the anaerobic tank 2, when the sewage is treated by anaerobic treatment, the water body flows into the distribution disc 22 from the pulse grit pipe 100, flows into the left first hollow cross ring 200 through the forward through pipe 220, the water flow impacts the floating filler ball 201 in the hollow cross ring 200, the water body is treated by the anaerobic microorganism in the floating filler ball 201 for the first time, then, under the action of the impact force of the water flow, the water body sequentially passes through each hollow cross ring 200 to complete multiple anaerobic treatments, finally, flows out through the forward liquid outlet pipe 202 and falls to the second fixed filler frame 21 to perform the second anaerobic treatment, finally, overflows through the water pipe 25, when the sewage is treated by anaerobic treatment again, in order to balance the position of the porous filler ball 204 and avoid that the porous filler ball 204 is excessively concentrated in a certain place in the hollow cross ring 200, the water body flows into the right first hollow cross ring 200 through the reverse through pipe 222 after flowing into the distribution disc 22, the water flow impacts and is treated by anaerobic treatment in the reverse direction;

[0068] S3, the water body treated by the anaerobic tank 2 overflows to the aerobic tank 3 through the water pipe 25 and one length of the horizontal aeration pipe 41 to perform aerobic treatment, and the organic matter, nitrogen and phosphorus, heavy metal in the water body can be removed, after the aerobic treatment is completed, the water body is discharged and collected;

[0069] S4, in the process of anaerobic treatment, the biogas produced overflowed from the bottom end of the gas outlet pipe 23, under the action of natural wind from the upper end of the gas outlet pipe 23, the rotating fan 241 was driven to rotate, negative pressure air suction was generated by the rotation of the rotating fan 241, so that the gas outlet pipe 23 formed negative pressure, at this time, the external air entered the U-shaped aeration pipe 40 through the air inlet pipe 31, and was sprayed into the water body through the spray holes 44 in the side wall of the U-shaped aeration pipe 40, thereby promoting aeration, rural sewage has the characteristics of small sewage quantity and intermittent inflow, therefore the water in the horizontal aeration pipe 41 is basically not in the full pipe state, in order to save the pipe, the waterway and the airway share the horizontal aeration pipe 41, the residual air in the U-shaped aeration pipe 40 flows out through the upper end of the horizontal aeration pipe 41 and the gas outlet pipe 23, when the air wind is small, in order to improve the aeration effect, the external air is pumped into the U-shaped aeration pipe 40 by the air compressor 43, and is sprayed into the water body through the spray holes 44 in the side wall of the U-shaped aeration pipe 40, thereby promoting aeration, the residual air in the U-shaped aeration pipe 40 flows out through the horizontal aeration pipe 41 and the gas outlet pipe 23.

Claims

1. A non-energy consuming rural domestic sewage treatment apparatus, characterized in that, The filter grit tank (1), the anaerobic tank (2), the aerobic tank (3), the aeration pipe assembly (4) arranged in the aerobic tank (3) and the sewage collection pipe (5) are sequentially arranged along the water flow direction. The upper end of the anaerobic tank (2) is provided with an air outlet pipe (23), and the upper end of the anaerobic tank (2) is provided with a support mounting bracket (24) located above the air outlet pipe (23). The center of the support mounting bracket (24) is connected with a rotating fan (241) through a lossless rotating shaft (240). The aerobic tank (3) is provided with a first fixed filler frame (30), and the upper end of the aerobic tank (3) is provided with an air inlet pipe (31). The aeration pipe assembly (4) includes a U-shaped aeration pipe (40) arranged in the aerobic tank (3) and a horizontal aeration pipe (41) used for connecting one end of the air outlet pipe (23) and the U-shaped aeration pipe (40). The horizontal aeration pipe (41) and the U-shaped aeration pipe (40) are both provided with a plurality of spray holes (44). The bottom end of the anaerobic tank (2) is communicated with the horizontal aeration pipe (41) through a water passage (25). The sewage collection pipe (5) includes a plurality of sewage collection branch pipes (50) used for collecting domestic sewage of each farmer and a collection pipe (51) used for connecting each sewage collection branch pipe (50). The collection pipe (51) is connected with the filter grit tank (1).

2. The non-energy consumption rural domestic sewage treatment device according to claim 1, characterized in that, The filter grit tank (1) is provided with a grit filter assembly (10). The grit filter assembly (10) includes a pulse grit pipe (100) arranged in the filter grit tank (1) and distributed in the horizontal direction, a plurality of cleaning valves (101) arranged at the bottom end of the pulse grit pipe (100), a falling material cleaning box (102) arranged in the filter grit tank (1) and located at the bottom end of the pulse grit pipe (100), and an opening and closing cover plate (103) arranged on the side wall of the filter grit tank (1).

3. The non-energy consumption rural domestic sewage treatment device according to claim 2, characterized in that, The pulse grit pipe (100) is connected through a plurality of grit sub-pipes (104). The cleaning valves (101) are one-to-one corresponding to the grit sub-pipes (104) and arranged at the lower end of the grit sub-pipes (104). The filter grit tank (1) is provided with a horizontal limiting frame (11). The horizontal limiting frame (11) is provided with a limiting opening (12) located on the outer wall of the grit sub-pipe (104).

4. The energy-free rural domestic sewage treatment apparatus according to claim 1, characterized in that, The height between the upper end of the air outlet pipe (23) and the upper end of the anaerobic tank (2) is 2-4m.

5. The non-energy consumption rural domestic sewage treatment device according to claim 1, characterized in that, According to the weight parts, the components of the filler in the first fixed filler frame (30) include 10-15g of zirconium oxide, 25-30g of aluminum oxide, 5-8g of glass powder, 5-10g of sodium metasilicate, 3-5g of alginate and 1-3g of polyethylene glycol.

6. The kind of non-energy consumption rural domestic sewage treatment equipment according to claim 1, characterized in that, The horizontal subsurface flow tank (32) is connected to the water outlet side of the aerobic tank (3), and the horizontal subsurface flow tank (32) is planted with hydroponic plants.

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