A rural sewage treatment and resource utilization system

Abstract

The application relates to the technical field of rural sewage treatment and resource utilization, and discloses a rural sewage treatment and resource utilization system, which comprises a pretreatment module, a biological treatment module and a deep treatment module; the pretreatment module comprises an adjusting tank and a grating; the biological treatment module comprises an aerobic reactor and an anaerobic reactor; a filter layer and an aeration assembly are arranged in the aerobic reactor; the anaerobic reactor is arranged above the aerobic reactor; a filler layer is arranged at the bottom of the anaerobic reactor; the deep treatment module comprises a sedimentation tank and a filter; water pipes and water pumps are arranged in communication between the adjusting tank and the anaerobic reactor and between the aerobic reactor and the sedimentation tank; the water pipe connected with the aerobic reactor and the sedimentation tank penetrates through the filter and extends to the lower side of the filter; a recycled water storage tank is arranged on the side, away from the biological treatment module, of the sedimentation tank; and the recycled water storage tank and the sedimentation tank are connected with an overflow pipe. The application has the effect of improving the sewage treatment efficiency.

Description

Technical Field

[0001] This application relates to the field of rural sewage treatment and resource utilization technology, and in particular to a rural sewage treatment and resource utilization system. Background Technology

[0002] With the in-depth implementation of the rural revitalization strategy, the living standards of rural residents have significantly improved. New housing construction is constantly emerging, and water-using appliances such as washing machines and dishwashers are becoming increasingly common, leading to a sharp increase in the amount of domestic sewage generated. At the same time, the rural industrial structure continues to optimize, with the scale of industries such as agricultural product processing and livestock breeding gradually expanding, resulting in a corresponding increase in the discharge of industrial wastewater and livestock wastewater.

[0003] The indiscriminate discharge of large amounts of untreated sewage has led to the deterioration of rural river water quality, turning the water black and foul-smelling. This has not only severely damaged the originally beautiful rural ecological environment and threatened the health of residents, but also hindered the sustainable development of the rural economy.

[0004] In fact, rural sewage is rich in nutrients such as nitrogen and phosphorus, as well as organic matter. If effectively treated and utilized, it has immense value. For example, treated sewage can be used for farmland irrigation, achieving water resource recycling and alleviating rural water shortages. The nitrogen and phosphorus in the sewage can be processed into organic fertilizer for agricultural production, reducing the use of chemical fertilizers, lowering agricultural production costs, and mitigating soil pollution and eutrophication caused by excessive fertilizer use. However, current rural sewage treatment systems generally lack effective resource utilization methods, resulting in serious waste of resources.

[0005] Traditional rural wastewater treatment relies heavily on simple facilities such as septic tanks and biogas digesters. While septic tanks can perform preliminary sedimentation and anaerobic fermentation of wastewater, their treatment capacity is limited, and their removal rates of pollutants such as nitrogen and phosphorus are low, making it difficult to meet current national wastewater discharge standards. Biogas digesters primarily focus on the anaerobic fermentation of organic matter in wastewater to produce biogas; however, their purification effect on wastewater is poor, and the effluent still contains a large amount of pollutants. Furthermore, these traditional treatment facilities occupy a large area, resulting in resource waste in rural areas where land resources are relatively scarce. With the continuous increase in wastewater volume, traditional treatment methods can no longer meet the growing demand for wastewater treatment, and there is an urgent need for innovative and efficient treatment technologies to improve wastewater treatment efficiency. Utility Model Content

[0006] To improve wastewater treatment efficiency, this application provides a rural wastewater treatment and resource utilization system.

[0007] The rural sewage treatment and resource utilization system provided in this application adopts the following technical solution:

[0008] A rural wastewater treatment and resource utilization system includes a pretreatment module, a biological treatment module, and a deep treatment module. The pretreatment module includes an equalization tank and a screen installed within the equalization tank. The biological treatment module includes an aerobic reactor and an anaerobic reactor stacked and connected. The aerobic reactor contains a filter media layer and an aeration assembly to provide a habitat for aerobic microorganisms. The aeration assembly is located below the filter media layer and provides oxygen for the aerobic microorganisms. The anaerobic reactor is located above the aerobic reactor, and a packing layer for decomposing macromolecular organic matter in the wastewater is installed at its bottom. The deep treatment module includes a sedimentation tank and a filter installed within the sedimentation tank. Water pipes and water pumps are connected between the equalization tank and the anaerobic reactor, and between the aerobic reactor and the sedimentation tank. The outlet end of the water pipe connecting the aerobic reactor and the sedimentation tank passes through the filter and extends below the filter. A recycled water storage tank is located on the side of the sedimentation tank away from the biological treatment module. An overflow pipe is connected to the opposite side of the recycled water storage tank and the sedimentation tank, and the overflow pipe is located above the filter.

[0009] By adopting the above technical solution, wastewater first flows into the equalization tank, where large particles are intercepted by the screen and then pumped to the anaerobic reactor. Inside the anaerobic reactor, the packing layer decomposes large organic molecules in the wastewater. The wastewater then enters the aerobic reactor, where the filter layer provides a habitat for aerobic microorganisms, and the aeration components provide sufficient oxygen for these microorganisms, further degrading organic pollutants. After biological treatment, the wastewater flows into the sedimentation tank, where the filter intercepts suspended solids, and the clear water flows through the overflow pipe into the reclaimed water storage tank, achieving water resource recycling. This system, through the organic combination of pretreatment, biological treatment, and advanced treatment, effectively removes organic matter, nitrogen, phosphorus, and other pollutants from wastewater, significantly improving wastewater treatment efficiency. Simultaneously, it achieves wastewater resource utilization, alleviates water shortages in rural areas, reduces fertilizer use, lowers agricultural production costs, and mitigates soil pollution and eutrophication.

[0010] Optionally, the aeration assembly includes an aeration pipe laid at the bottom of the aerobic reactor, several aeration heads connected to the aeration pipe, and a blower for pressurizing and filling the aeration pipe with air. The air inlet end of the aeration pipe extends through the side wall of the aerobic reactor, and the blower is connected to the air inlet end of the aeration pipe extending out of the aerobic reactor.

[0011] By employing the above technical solution, a blower continuously supplies compressed air into the aeration pipes laid at the bottom of the aerobic reactor. The air is then ejected as tiny bubbles through multiple aeration heads on the pipes. These bubbles continuously burst as they rise, achieving efficient oxygen dissolution. This provides sufficient oxygen to the aerobic microorganisms, promoting their metabolic activities and accelerating the decomposition and transformation of organic matter in the wastewater. Simultaneously, the agitation effect of the bubbles enhances the contact efficiency between the wastewater and the aerobic microorganisms in the filter media, improving the wastewater treatment effect.

[0012] Optionally, a cavity is formed inside the wall of the overflow pipe, and an ultraviolet spiral lamp is arranged around the cavity, and the inner wall of the overflow pipe is transparent.

[0013] By adopting the above technical solution, the water purified by the biological treatment module and the advanced treatment module can undergo further sterilization and disinfection treatment by ultraviolet spiral lamps in the overflow pipe before flowing into the reclaimed water storage tank. The transparent inner pipe wall design allows ultraviolet light to fully irradiate the water flow, effectively killing residual bacteria and viruses, significantly improving the hygiene standards of the effluent, enhancing the safety of reclaimed water, and simplifying the complex process of traditionally adding additional disinfection equipment, making the system structure more compact and efficient.

[0014] Optionally, the inner wall of the regulating pool is provided with vertically arranged insertion slots on opposite sides, the top of the insertion slots extends to the top wall of the regulating pool, and the insertion slots are slidably connected to mounting blocks, which are mounted on the grid members.

[0015] By adopting the above technical solution, the grating components can be quickly assembled and disassembled through the cooperation of the mounting block and the insertion slot, facilitating cleaning or replacement of the grating components. This ensures that the grating components maintain their high efficiency in intercepting impurities over a long period, thereby improving the stability and processing efficiency of the entire pretreatment module.

[0016] Optionally, the regulating tank is equipped with a dredging assembly for unblocking the grating. The dredging assembly includes a stirring shaft rotatably mounted at the center of the grating via a bearing, a brush rod vertically mounted on the side wall of the stirring shaft, and a rotating motor that drives the stirring shaft to rotate. The top wall of the regulating tank is covered with a cover plate, and the cover plate has a sewage inlet. The rotating motor is located at the top of the cover plate, and its output shaft rotatably passes through the cover plate and is coaxially connected to the stirring shaft. When the stirring shaft rotates once, the brush rod is always in contact with the surface of the grating.

[0017] By adopting the above technical solution, the rotating motor drives the stirring shaft to rotate, which in turn drives the brush rod to continuously clean the surface of the grid, thereby timely removing solid impurities attached to the grid and impurities clogging the gaps in the grid, thus improving the stability of the filtration effect of the grid.

[0018] Optionally, a cylindrical recess is provided at the bottom center of the regulating tank, and the stirring shaft extends out of the bottom end of the grid and is coaxially connected to the stirring paddle via a coupling. The bottom end of the stirring paddle is inserted into the recess and rotates with the recess.

[0019] By adopting the above technical solution, the agitator rotates at the bottom of the equalization tank under the drive of the agitator shaft, which can fully agitate the sewage deposited at the bottom, prevent the accumulation of sludge, and promote the uniform mixing of various substances in the sewage. This design not only achieves homogenization of water quality but also improves the stability of sewage flow and concentration in subsequent treatment processes, creating a more suitable working environment for the biological treatment module, thereby effectively improving the sewage treatment efficiency of the entire system and ensuring the reliability of the effluent quality.

[0020] Optionally, both the aerobic reactor and the anaerobic reactor are provided with a diversion plate connected to a water pipe at their inner top. The diversion plate is hollow inside, and its bottom is connected to the inner cavity with a number of diversion holes.

[0021] By adopting the above technical solution, the diversion plate allows the wastewater entering the reactor to be evenly sprayed out through the internal hollow structure and multiple diversion holes at the bottom. The evenly distributed water flow helps aerobic and anaerobic microorganisms to fully contact the organic matter in the wastewater, improving the decomposition effect of pollutants and thus ensuring the quality and stability of wastewater treatment.

[0022] Optionally, a flow blocking frame is provided at the bottom of the flow blocking plate, and a blocking rod is inserted into the top of the flow blocking frame corresponding to each flow diversion hole. Several vertically arranged guide rods are arranged around the perimeter of the flow blocking frame. The top end of the guide rod slides through the side wall of the flow blocking plate and extends out of the top wall of the flow blocking plate. A plug is provided at the end of the guide rod extending out of the top wall of the flow blocking plate. A spring is sleeved on the guide rod to support the flow blocking plate and the plug. When the spring is in its natural state, the blocking rod is inserted into the corresponding flow diversion hole.

[0023] By adopting the above technical solution, the spring pushes the plug in its natural state, causing the plug rod to be tightly inserted into the diversion hole. This allows sewage to first enter and fill the diversion plate. As the water pressure gradually increases, it overcomes the resistance of the spring, and the sewage flows out evenly from each diversion hole. This effectively improves the uniformity of sewage diversion, avoids the phenomenon of concentrated or uneven water flow, and thus further improves the rationality and efficiency of water flow distribution in the sewage treatment process.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. Wastewater first flows into the equalization tank, where large particles are intercepted by the screen and then pumped to the anaerobic reactor. Inside the anaerobic reactor, the packing layer decomposes large organic molecules in the wastewater. The wastewater then enters the aerobic reactor, where the filter media provides a habitat for aerobic microorganisms, and the aeration components provide sufficient oxygen for these microorganisms, further degrading organic pollutants. After biological treatment, the wastewater flows into the sedimentation tank, where the filter intercepts suspended solids. The clear water overflows into a reclaimed water storage tank, achieving water recycling. This system, through the organic combination of pretreatment, biological treatment, and advanced treatment, effectively removes organic matter, nitrogen, phosphorus, and other pollutants from wastewater, significantly improving wastewater treatment efficiency. Simultaneously, it enables wastewater resource utilization, alleviates water shortages in rural areas, reduces fertilizer use, lowers agricultural production costs, and mitigates soil pollution and eutrophication.

[0026] 2. A blower continuously supplies compressed air into the aeration pipes laid at the bottom of the aerobic reactor. The air is then ejected as tiny bubbles through multiple aeration heads on the pipes. These bubbles continuously burst as they rise, achieving efficient oxygen dissolution. This provides sufficient oxygen to the aerobic microorganisms, promoting their metabolic activities and accelerating the decomposition and transformation of organic matter in the wastewater. Simultaneously, the agitation effect of the bubbles enhances the contact efficiency between the wastewater and the aerobic microorganisms in the filter media, improving the wastewater treatment effect.

[0027] 3. After purification by the biological treatment module and the advanced treatment module, the water undergoes further sterilization and disinfection treatment by an ultraviolet spiral lamp inside the overflow pipe before flowing into the reclaimed water storage tank. The transparent inner pipe wall design allows ultraviolet light to fully irradiate the water flow, effectively killing residual bacteria and viruses, significantly improving the hygiene standards of the effluent, enhancing the safety of reclaimed water, and simplifying the complex process of traditionally adding additional disinfection equipment, making the system structure more compact and efficient. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0029] Figure 2 This is a cross-sectional view showing the internal structure of the regulating tank in an embodiment of this application.

[0030] Figure 3 This is a cross-sectional view showing the internal structure of the aerobic reactor and the anaerobic reactor in the embodiments of this application.

[0031] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0032] Figure 5 This is a cross-sectional view showing the internal structure of the sedimentation tank in the embodiments of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Pretreatment module; 11. Equalization tank; 111. Insertion groove; 112. Cover plate; 1121. Inlet; 113. Recessed platform; 12. Grille; 121. Mounting block; 2. Biological treatment module; 21. Aerobic reactor; 211. Filter media layer; 212. Aeration assembly; 2121. Aeration pipe; 2122. Aeration head; 2123. Blower; 22. Anaerobic reactor; 221. Packing layer 3. Deep processing module; 31. Sedimentation tank; 32. Filter element; 4. Unblocking component; 41. Stirring shaft; 411. Stirring paddle; 42. Brush rod; 43. Rotating motor; 5. Diverter plate; 51. Diverter hole; 6. Flow blocking frame; 61. Plug rod; 62. Guide rod; 621. Plug; 622. Spring; 7. Water pipe; 71. Water pump; 8. Reclaimed water storage tank; 9. Overflow pipe; 91. Ultraviolet spiral lamp. Detailed Implementation

[0035] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0036] This application discloses a rural sewage treatment and resource utilization system.

[0037] Reference Figure 1 A rural sewage treatment and resource utilization system includes a pretreatment module 1, a biological treatment module 2, and an advanced treatment module 3. The pretreatment module 1 is used for preliminary filtration and regulation of sewage, the biological treatment module 2 is used for biodegradation treatment of sewage, and the advanced treatment module 3 is used for further purification of sewage, achieving the effect of efficient sewage treatment and resource utilization.

[0038] Reference Figure 1 and Figure 2The pretreatment module 1 includes an equalization tank 11 and a grid 12. Vertically arranged insertion slots 111 are formed on opposite sides of the inner wall of the equalization tank 11, with the top of the slots extending to the top wall of the equalization tank 11. An installation block 121 is slidably inserted into the slots 111, and the installation block 121 is fixedly mounted on the grid 12. In this embodiment, the grid 12 is a stainless steel grid plate. A clearing assembly 4 for clearing the grid 12 is also provided inside the equalization tank 11. The clearing assembly 4 includes a stirring shaft 41, a brush rod 42, and a rotating motor 43. A cover plate 112 covers the top wall of the equalization tank 11, with a sewage inlet 1121 on the cover plate 112. The rotating motor 43 is fixedly mounted on the top of the cover plate 112, and its output shaft rotatably passes through the cover plate 112 and is coaxially connected to the stirring shaft 41. The stirring shaft 41 is rotatably mounted at the center of the grid 12 via bearings. The brush rod 42 is perpendicular to the stirring shaft 41 and fixedly mounted on the side wall of the stirring shaft 41. As the stirring shaft 41 rotates one revolution, the brush rod 42 remains in contact with the surface of the grid component 12.

[0039] Reference Figure 2 A cylindrical recessed platform 113 is fixedly installed at the bottom center of the regulating tank 11. The stirring shaft 41 extends out of the bottom end of the grid piece 12 and is coaxially connected to the stirring paddle 411 via a coupling. The bottom end of the stirring paddle 411 is inserted into the recessed platform 113 and rotates with the recessed platform 113.

[0040] Reference Figure 3 The biological treatment module 2 includes an aerobic reactor 21 and an anaerobic reactor 22. The aerobic reactor 21 contains a filter layer 211 and an aeration assembly 212. The filter layer 211 can be made of bio-ceramic granules or activated carbon granules, possessing good adsorption properties and biocompatibility. The aeration assembly 212 is located below the filter layer 211 and provides oxygen for the aerobic microorganisms. The aeration assembly 212 includes an aeration pipe 2121, several aeration heads 2122, and a blower 2123. The aeration pipe 2121 is laid at the bottom inner part of the aerobic reactor 21, with its inlet end extending through the side wall of the aerobic reactor 21. The blower 2123 is installed on the inlet end of the aeration pipe 2121, pressurizing and filling the aeration pipe 2121 with air. Several aeration heads 2122 are connected and distributed on the aeration pipe 2121.

[0041] Reference Figure 3 The anaerobic reactor 22 is fixedly installed on top of the aerobic reactor 21, and the two reactors are stacked and connected. A packing layer 221 is provided at the bottom of the anaerobic reactor 22. The packing layer 221 can be made of volcanic rock or zeolite particles, which can effectively promote the growth and reproduction of anaerobic microorganisms.

[0042] Reference Figure 3 and Figure 4To further improve the uniformity of water flow distribution during wastewater treatment, a flow divider plate 5 is fixedly installed at the top of both the aerobic reactor 21 and the anaerobic reactor 22. The flow divider plate 5 is hollow inside, and its bottom is connected to the inner cavity with several flow divider holes 51. A flow blocking frame 6 is installed at the bottom of the flow divider plate 5. A blocking rod 61 is inserted into the top of the flow blocking frame 6 corresponding to each flow divider hole 51, and the blocking rod 61 is fixedly installed on the flow blocking frame 6. Several vertically arranged guide rods 62 are arranged around the top perimeter of the flow blocking frame 6. In this embodiment, one guide rod 62 is installed at each corner as an example. The bottom end of the guide rod 62 is fixedly installed on the top wall of the flow blocking frame 6. The top end of the guide rod 62 slides through the side wall of the flow divider plate 5 and extends out of the top wall of the flow divider plate 5. A plug 621 is fixedly installed on the end of the guide rod 62 that extends out of the top wall of the flow divider plate 5. A spring 622 is sleeved on the guide rod 62 to support the flow divider plate 5 and the plug 621.

[0043] Reference Figure 4 When the spring 622 is in its natural state, the plug rod 61 is inserted into the corresponding diversion hole 51. As the water pressure in the diversion plate 5 gradually increases, the plug rod 61 sinks and detaches from the diversion plate 5 after the flow blocking frame 6 overcomes the resistance of the spring 622. At this time, the sewage can flow out evenly from each diversion hole 51.

[0044] Reference Figure 5 The advanced treatment module 3 includes a sedimentation tank 31 and a filter element 32. Water pipes 7 and water pumps 71 are installed between the equalization tank 11 and the anaerobic reactor 22, and between the aerobic reactor 21 and the sedimentation tank 31. The outlet end of the water pipe 7 connecting the anaerobic reactor 22 and the aerobic reactor 21 is connected to a diversion plate 5. The filter element 32 can be a quartz sand filter layer or a multi-layer composite filter screen. The outlet end of the water pipe 7 connecting the aerobic reactor 21 and the sedimentation tank 31 passes through the filter element 32 and extends below it.

[0045] Reference Figure 1 and Figure 5 A recycled water storage tank 8 is located on the side of the sedimentation tank 31 away from the biological treatment module 2. An overflow pipe 9 is fixedly installed on the opposite side of the recycled water storage tank and the sedimentation tank 31, and the overflow pipe 9 is located above the filter element 32. A cavity is opened in the wall of the overflow pipe 9, and an ultraviolet spiral lamp 91 is installed around the cavity. The inner wall of the overflow pipe 9 is transparent, thereby effectively killing bacteria in the sewage and ensuring the safety of the effluent water quality.

[0046] The implementation principle of a rural sewage treatment and resource utilization system according to an embodiment of this application is as follows: Sewage first flows into the equalization tank 11, where large particulate impurities are intercepted by the screen 12, and then pumped to the anaerobic reactor 22 by the water pump 71. In the anaerobic reactor 22, the packing layer 221 decomposes large molecular organic matter in the sewage. Subsequently, the sewage enters the aerobic reactor 21, where the filter layer 211 provides a habitat for aerobic microorganisms, and the aeration components 212 provide sufficient oxygen for these microorganisms, further degrading organic pollutants in the sewage. After biological treatment, the sewage flows into the sedimentation tank 31, where the filter element 32 intercepts suspended solids. The clear water is then sterilized by the ultraviolet spiral lamp 91 in the overflow pipe 9 before flowing into the reclaimed water storage tank 8, achieving water resource recycling. This system, through the organic combination of pretreatment, biological treatment, and advanced treatment, effectively removes organic matter, nitrogen, phosphorus, and other pollutants from sewage, significantly improving sewage treatment efficiency. Simultaneously, it achieves sewage resource utilization, alleviates water shortages in rural areas, reduces fertilizer use, lowers agricultural production costs, and mitigates soil pollution and eutrophication problems.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rural sewage treatment and resource utilization system, characterized in that... The system includes a pretreatment module (1), a biological treatment module (2), and a deep treatment module (3). The pretreatment module (1) includes an equalization tank (11) and a grid (12) installed in the equalization tank (11). The biological treatment module (2) includes an aerobic reactor (21) and an anaerobic reactor (22) stacked and connected together. The aerobic reactor (21) is provided with a filter media layer (211) and an aeration component (212) to provide a habitat for aerobic microorganisms. The aeration component (212) is located below the filter media layer (211). The anaerobic reactor (22) is located above the aerobic reactor (21). The bottom of the anaerobic reactor (22) is provided with a packing layer (212) for decomposing macromolecular organic matter in wastewater. 21) The deep treatment module (3) includes a sedimentation tank (31) and a filter element (32) installed in the sedimentation tank (31). Water pipes (7) and water pumps (71) are connected between the regulating tank (11) and the anaerobic reactor (22) and between the aerobic reactor (21) and the sedimentation tank (31). The water outlet of the water pipe (7) connecting the aerobic reactor (21) and the sedimentation tank (31) passes through the filter element (32) and extends to the bottom of the filter element (32). A recycled water storage tank (8) is provided on the side of the sedimentation tank (31) away from the biological treatment module (2). An overflow pipe (9) is connected to the opposite side of the recycled water storage tank and the sedimentation tank (31). The overflow pipe (9) is located above the filter element (32).

2. The rural sewage treatment and resource utilization system according to claim 1, characterized in that... The aeration assembly (212) includes an aeration pipe (2121) laid at the bottom of the aerobic reactor (21), a plurality of aeration heads (2122) connected to the aeration pipe (2121) and a blower (2123) for pressurizing and filling the aeration pipe (2121). The air inlet end of the aeration pipe (2121) extends through the side wall of the aerobic reactor (21), and the blower (2123) is connected to the air inlet end of the aeration pipe (2121) extending out of the aerobic reactor (21).

3. A rural sewage treatment and resource utilization system according to claim 1, characterized in that... The overflow pipe (9) has a cavity inside its wall, and an ultraviolet spiral lamp (91) is installed in the cavity. The inner wall of the overflow pipe (9) is transparent.

4. A rural sewage treatment and resource utilization system according to claim 1, characterized in that... The inner wall of the regulating pool (11) is provided with vertically arranged insertion grooves (111) on opposite sides. The top of the insertion grooves (111) extends to the top wall of the regulating pool (11). The insertion grooves (111) are slidably inserted with mounting blocks (121), and the mounting blocks (121) are arranged on the grid members (12).

5. A rural sewage treatment and resource utilization system according to claim 4, characterized in that... The regulating tank (11) is equipped with a dredging assembly (4) for dredging the grid (12). The dredging assembly (4) includes a stirring shaft (41) rotatably mounted at the center of the grid (12) via a bearing, a brush rod (42) vertically mounted on the side wall of the stirring shaft (41), and a rotating motor (43) that drives the stirring shaft (41) to rotate. The top wall of the regulating tank (11) is covered with a cover plate (112). The cover plate (112) has a sewage inlet (1121). The rotating motor (43) is located on the top of the cover plate (112). Its output shaft rotates through the cover plate (112) and is coaxially connected to the stirring shaft (41). When the stirring shaft (41) rotates one revolution, the brush rod (42) is always in contact with the surface of the grid (12).

6. A rural sewage treatment and resource utilization system according to claim 5, characterized in that... A cylindrical recessed platform (113) is provided at the bottom center of the regulating tank (11). The stirring shaft (41) extends out of the bottom end of the grid piece (12) and is coaxially connected to the stirring paddle (411) via a coupling. The bottom end of the stirring paddle (411) is inserted into the recessed platform (113) and rotates with the recessed platform (113).

7. A rural sewage treatment and resource utilization system according to claim 1, characterized in that... Both the aerobic reactor (21) and the anaerobic reactor (22) are equipped with a diversion plate (5) that connects to the water pipe (7) at the top. The diversion plate (5) is hollow inside and has several diversion holes (51) arranged in the bottom cavity.

8. A rural sewage treatment and resource utilization system according to claim 7, characterized in that... A flow blocking frame (6) is provided at the bottom of the flow blocking plate (5). A blocking rod (61) is inserted into the top of the flow blocking frame (6) corresponding to each flow diversion hole (51). Several vertically arranged guide rods (62) are arranged around the flow blocking frame (6). The top of the guide rod (62) slides through the side wall of the flow blocking plate (5) and extends out of the top wall of the flow blocking plate (5). A plug (621) is provided on the end of the guide rod (62) extending out of the top wall of the flow blocking plate (5). A spring (622) is sleeved on the guide rod (62) to support the flow blocking plate (5) and the plug (621). When the spring (622) is in the natural state, the blocking rod (61) is inserted into the corresponding flow diversion hole (51).

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