Rural domestic sewage trickling filtration treatment and planting and breeding application system

Abstract

The invention belongs to the technical field of rural domestic sewage recycling, and particularly relates to a rural domestic sewage trickling filtration treatment and planting and breeding application system. The device comprises a primary sedimentation tank, a first adjusting tank; microorganisms grow on the filler in the form of a biological membrane; a backflow hoisting shaft; an artificial wetland; a second adjusting tank; the fish pond is communicated with the second adjusting pond through a water inlet assembly and is communicated with the first adjusting pond; the hydroponic vegetable field is communicated with the second regulating reservoir. Nitrogen and phosphorus nutrient elements which are subjected to trickling filtration treatment and decomposition by using a biological trickling filtration method are absorbed and utilized by plants in the constructed wetland, and finally, the rural domestic sewage is recycled by adopting a hydroponic vegetable field and a fishpond at the same time, so that the rural domestic sewage can be effectively treated, and rural domestic sewage resources are reasonably utilized. In addition, the water inlet assembly can guarantee that water can always flush in the horizontal line direction of the liquid level in the fishpond when water flows out.

Description

Technical Field

[0001] The present invention belongs to the technical field of recycling rural domestic sewage, and in particular relates to a rural domestic sewage trickling filtration treatment and breeding application system. Background Art

[0002] Rural domestic sewage refers to sewage discharged during the life of residents, mainly from feces, urine, sanitary ware washing, bathing, laundry, and kitchen cleaning water. Unlike industrial wastewater, rural domestic sewage has simple composition. Nitrogen and phosphorus in sewage can be used as nutrients for the growth of plants and vegetables after simple treatment. Therefore, rural domestic sewage can be recycled. Rural domestic sewage breeding application system is an effective way of sewage treatment and resource utilization. It can not only improve the rural water environment, but also provide water and nutrients for agricultural production, and promote the sustainable development of rural economy.

[0003] For example, a Chinese invention patent with publication number CN109368800A discloses an ecological treatment method for rural domestic sewage and aquaculture sewage. This method uses earth ridges to divide the bottom of a canal into two parts along the direction of sewage flow and makes the earth ridges higher than the water surface, and plants willows and / or water spinach on the earth ridges; and plants fruits and / or trumpet creepers on the two slopes respectively so that their vines climb onto bamboo racks built on the corresponding slopes.

[0004] For another example, Chinese invention patent publication number CN110759598A discloses a highly efficient rural domestic sewage treatment system, which cultivates algae and then uses the water discharged from the treatment system for plant and fish cultivation.

[0005] However, in the existing technology, rural domestic sewage is often only utilized in a single aspect (crop farming, biological farming) without systematic design, resulting in rural domestic sewage not being well utilized in multiple agricultural scenarios, causing a certain degree of waste of resources.

[0006] In summary, there is a need for a breeding application system that can make multi-faceted use of rural domestic sewage. Summary of the invention

[0007] The purpose of the present invention is to provide a rural domestic sewage trickling filtration treatment and breeding application system. The system uses biological trickling filtration for trickling filtration treatment, and the decomposed nitrogen and phosphorus nutrients are then absorbed and utilized by plants in artificial wetlands. Finally, hydroponic vegetable fields and fish ponds are used to recycle rural domestic sewage, which can achieve effective treatment of rural domestic sewage and rationally utilize rural domestic sewage resources.

[0008] The technical solution adopted by the present invention to solve the above problems is: a rural domestic sewage trickling filtration treatment and breeding application system, comprising: primary sedimentation tank, for influent sewage; a first regulating tank, connected to the primary settling tank; An assembled trickling filter tank is connected to the first regulating tank via a lift pump, wherein a filler is provided in the assembled trickling filter tank, and microorganisms grow on the filler in the form of a biofilm; A reflux lifting well connected to the assembled trickling filter; An artificial wetland connected to the return lift well; a second regulating pool, connected to the artificial wetland; a fish pond, connected to the second regulating tank through a water inlet assembly, and connected to the first regulating tank; The hydroponic vegetable field is connected to the second regulating tank.

[0009] Among them, the primary sedimentation tank is used for the initial sedimentation of the incoming sewage. Through the action of gravity, large particles of suspended matter and sediment in the sewage are removed, reducing the burden on the subsequent treatment system.

[0010] The first regulating tank regulates the sewage after the primary sedimentation tank treatment to balance the sewage flow and water quality fluctuations. It can store a certain amount of sewage to provide a stable water inlet for the subsequent trickling filtration treatment.

[0011] The assembled trickling filter tank uses the filler and biofilm to treat the sewage biologically. Microorganisms grow on the filler, decompose organic matter and pollutants in the sewage, and improve the water quality. The lifting pump sends the sewage into the tank. In the assembled trickling filter tank, the commonly used microorganisms include the following categories: Aerobic bacteria, such as nitrifying bacteria (such as nitrite oxidizing bacteria, nitrate reducing bacteria, etc.), work in an oxygen-sufficient environment and are mainly used for the decomposition of organic matter and the removal of nitrogen.

[0012] Algae, such as green algae, absorb carbon dioxide through photosynthesis and provide biodegradation and recycling of nutrients in the water.

[0013] Protozoa, such as ciliates and amoebas, are single-celled organisms that consume bacteria and organic matter in the water, helping to maintain the balance of microbial ecology.

[0014] The return lift returns the treated water to other parts of the system, usually to control the water level and maintain the cycle of sewage treatment. The return lift is equipped with a lift pump to pump the treated water from the return lift to the constructed wetland, and a valve is also provided to control the opening and closing of the water flow to ensure the safety and flexibility of the system.

[0015] Constructed wetlands further treat the water discharged from the trickling filter using the natural purification capabilities of plants and soil. Plants absorb nutrients from the water through their roots, and the soil purifies the water through physical, chemical and biological processes. Constructed wetlands also contain anaerobic bacteria, such as methanogens, which decompose organic matter in the absence of oxygen, especially in the anaerobic stage of wastewater treatment.

[0016] The second regulating pool regulates the water after the artificial wetland treatment to ensure uniform water quality for subsequent use (such as irrigation or aquaculture). This pool can adjust the water volume and water quality to meet different usage requirements.

[0017] The fish pond uses the treated water for aquaculture. The water in the fish pond provides nutrients to promote the growth of fish, while the fish excrement can also be used as fertilizer for plant growth, forming a virtuous cycle.

[0018] Hydroponic vegetable fields use treated water for hydroponic cultivation. Through hydroponic technology, plants grow without soil, using nutrients in water to achieve efficient agricultural production. Treated water provides plants with the necessary moisture and nutrients.

[0019] After artificial wetland treatment, the nitrogen and phosphorus in the water body are reduced. To prevent abnormal fluctuations in water quality and quantity, the water flows through the second regulating pool, and most of the water flows into the hydroponic vegetables, and the remaining small part is filled into the fish pond. The water after the hydroponic vegetables are discharged; the fish in the fish pond metabolize normally, and the nitrogen and phosphorus in the water body gradually increase, and then flow back to the front first regulating pool and flow into the trickling filter for treatment again.

[0020] In particular, when water is injected into the fish pond, the newly injected water is flushed in along the horizontal direction of the liquid surface inside the fish pond. Through the use of the water inlet component, it can be effectively avoided that the sediment and humus at the bottom of the fish pond 7 are easily caused to float up and cause water pollution when water is injected into the fish pond.

[0021] A primary sedimentation tank, for inflowing sewage, wherein a grid is provided in the primary sedimentation tank; a first regulating tank, connected to the primary settling tank; An assembled trickling filter tank is connected to the first regulating tank via a lift pump, wherein a filler is provided in the assembled trickling filter tank, and microorganisms grow on the filler in the form of a biofilm; A reflux lifting well connected to the assembled trickling filter; An artificial wetland connected to the return lift well; a second regulating pool, connected to the artificial wetland; a fish pond, connected to the second regulating tank through a water inlet assembly, and connected to the first regulating tank; The hydroponic vegetable field is connected to the second regulating tank.

[0022] A further preferred technical solution is characterized in that the ratio of the water outflow from the second regulating pond to the fish pond and the hydroponic vegetable field is 1:(2-4).

[0023] Among them, the second regulating tank flows most of the water into the hydroponic vegetable field and only a small part into the fish pond, because the hydroponic vegetable field can efficiently utilize the nutrients in the water, promote plant growth, and can treat most of the sewage. By flowing more water into the hydroponic vegetable pool, the yield and quality of crops can be increased, thereby achieving higher economic benefits. Hydroponic vegetables can absorb nutrients in the water and reduce the concentration of suspended solids and organic matter, which helps to improve water quality. Flowing most of the water into the hydroponic pool can use the growth of plants to purify the water. Fish are more sensitive to changes in water quality, especially the concentration of nitrogen and other pollutants. Flowing a small part of the water to the fish pond can reduce the direct impact on the water quality of the fish pond, ensure the healthy growth of fish, and also treat part of the wastewater.

[0024] A further preferred technical solution is characterized in that the water inlet assembly includes a water inlet pipe fixedly connected to the fish pond, a first floating board is provided in the fish pond, a water outlet pipe is fixedly connected to the top of the first floating board, and a corrugated telescopic tube is fixedly connected between the water inlet pipe and the water outlet pipe.

[0025] A further preferred technical solution is characterized in that a first top plate is fixedly connected to the top of the inner cavity of the fish pond, a sliding rod is symmetrically fixedly connected to the bottom of the first top plate, a sliding block is slidably connected to the outside of the sliding rod, and a connecting rod is hinged between the sliding block and the first floating plate through a hinge.

[0026] A further preferred technical solution is characterized in that a net frame is provided in the fish pond, a second floating plate is fixedly connected to the net frame, and a retaining net is hinged on the net frame.

[0027] A further preferred technical solution is characterized in that a connecting piece is fixedly connected to the top of the net frame, magnet sheets are fixedly connected to the connecting piece and the retaining net, and a retaining rod for resisting the retaining net is fixedly connected to the fish pond via a second top plate.

[0028] A further preferred technical solution is characterized in that a guide rod is fixedly connected in the fish pond, and the guide rod is slidably connected to the second floating board.

[0029] A further preferred technical solution is characterized in that a guide plate is fixedly connected to the screen frame.

[0030] A further preferred technical solution is characterized in that the magnetic pole directions of the opposite surfaces of the magnet sheets on the connecting member and the blocking net are arranged in opposite directions.

[0031] A further preferred technical solution is characterized in that a lifting handle is fixedly connected to the top of the mesh frame.

[0032] In summary, the present invention has the following benefits: 1. The present invention uses biological trickling filtration to treat the decomposed nitrogen and phosphorus nutrients, which are then absorbed and utilized by plants in artificial wetlands. Finally, hydroponic vegetable fields and fish ponds are used to recycle rural domestic sewage, which can effectively treat rural domestic sewage and reasonably utilize rural domestic sewage resources.

[0033] 2. The present invention utilizes the floating effect of the first floating plate, the sliding cooperation between the slider and the sliding rod, and the hinge effect between the slider and the first floating plate and the connecting rod, so that the water outlet pipe on the top of the first floating plate can always change with the change of the liquid level inside the fish pond, thereby ensuring that the water body can always rush into the fish pond along the horizontal line direction of the liquid level inside the fish pond when discharging water, further preventing the occurrence of water pollution caused by the sediment and humus at the bottom of the fish pond.

[0034] 3. When the water body is rushed into the fish pond along the horizontal line direction of the liquid surface inside the fish pond, the garbage and fallen leaves on the water surface can be pushed and flow into the net frame with the water flow, thereby achieving the purpose of automatically collecting the garbage and fallen leaves and effectively ensuring the water quality inside the fish pond. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the rural domestic sewage recycling process of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of a fish pond from above according to the present invention; Figure 3 It is a three-dimensional schematic diagram of the connection structure of the first floating board, the first top board, the sliding rod, the sliding block and the connecting rod of the present invention; Figure 4 It is a three-dimensional schematic diagram of the screen frame connection structure of the present invention.

[0036] In the attached drawings, the components represented by the various reference numerals are as follows: 1. primary sedimentation tank; 2. first regulating tank; 3. assembled trickling filter; 4. return lift well; 5. artificial wetland; 6. second regulating tank; 7. fish pond; 8. hydroponic vegetable plot; 9. indicator arrow; 10. scale; 101. water inlet pipe; 102. first floating plate; 103. water outlet pipe; 104. corrugated telescopic pipe; 105. sliding rod; 106. sliding block; 107. connecting rod; 201. mesh frame; 202. second floating plate; 203. baffle net; 204. magnet sheet; 205. baffle rod; 206. guide rod; 207. guide plate. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0038] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0039] Example: Please combine Figure 1-4 , a rural domestic sewage trickling filtration treatment and breeding application system of this embodiment includes: A primary sedimentation tank 1, the primary sedimentation tank 1 is fixedly connected to a first regulating tank 2, the first regulating tank 2 is fixedly connected to an assembled trickling filter 3 through a lifting pump, the assembled trickling filter 3 is fixedly connected to a return lift well 4, the return lift well 4 is fixedly connected to an artificial wetland 5, the artificial wetland 5 is fixedly connected to a second regulating tank 6, the second regulating tank 6 is fixedly connected to a fish pond 7 and a hydroponic vegetable field 8, a grille is added to the primary sedimentation tank 1, which can preliminarily filter rural sewage to remove larger garbage impurities, the fish pond 7 is connected to the first regulating tank 2, so as to facilitate the recycling of aquaculture wastewater; The water inlet assembly includes a water inlet pipe 101 fixedly connected to the fish pond 7, a first floating plate 102 is arranged inside the fish pond 7, a water outlet pipe 103 is fixedly connected to the top of the first floating plate 102, a corrugated telescopic tube 104 is fixedly connected between the water inlet pipe 101 and the water outlet pipe 103, a first top plate is fixedly connected to the top of the inner cavity of the fish pond 7, a sliding rod 105 is symmetrically fixedly connected to the bottom of the first top plate, a sliding block 106 is slidably connected to the outside of the sliding block 105, and a connecting rod 107 is hinged between the sliding block 106 and the first floating plate 102 through a hinge.

[0040] The fish pond 7 is provided with a net frame 201 inside, and the two sides of the net frame 201 are fixedly connected with the second floating plate 202, and the one side of the net frame 201 is hinged with a blocking net 203, and the top of the net frame 201 is symmetrically fixedly connected with a connecting piece, and the bottom of the connecting piece and the top of the blocking net 203 are fixedly connected with a magnet sheet 204, and the top of the inner cavity of the fish pond 7 is symmetrically fixedly connected with a blocking rod 205 through the second top plate, and the inside of the fish pond 7 is symmetrically and vertically fixedly connected with a guide rod 206, and the guide rod 206 is fixedly connected with the guide rod 206. The second floating plates 202 on the same side are slidably connected to each other, which can guide the vertical movement of the net frame 201 to a certain extent. Guide plates 207 are fixedly connected to both sides of the net frame 201, which is convenient for smoothly guiding garbage and fallen leaves into the net frame 201. The magnetic pole directions of the opposite surfaces of the two groups of magnet sheets 204 on the same side are set in opposite directions, which is convenient for the retaining net 203 to be smoothly adsorbed with the connecting parts. A lifting handle is fixedly connected to the top of the net frame 201, which is convenient for taking the net frame 201 out of the fish pond 7.

[0041] The implementation principle of a rural domestic sewage trickling treatment and breeding application system in the embodiment of the present application is as follows: rural domestic sewage is first removed from the sinkable matter and floating matter through the grid and the primary sedimentation tank 1 to reduce the SS, and then treated by the trickling filter and the artificial wetland 5 for water replenishment of hydroponic vegetables and fish pond 7. In the biological trickling filter method, microorganisms grow on the filler in the biological trickling filter device in the form of a biofilm, and the pollutants in the sewage are degraded in the biofilm. The microorganisms in the biofilm use organic pollutants as carbon sources and energy sources. A part of the organic pollutants are converted into harmless water and carbon dioxide through the decomposition and metabolism of the microorganisms, and provide energy for the microorganisms, and another part of the organic pollutants are converted into the life substances of the microorganisms themselves through anabolism. The nitrogen and phosphorus nutrients decomposed after the trickling filter treatment are then absorbed and utilized by the plants in the artificial wetland 5. After the treatment of the artificial wetland 5, the nitrogen and phosphorus substances in the water body are reduced. In order to prevent abnormal fluctuations in water quality and water quantity, the water flows through the second regulating tank 6 to flow most of the water into the hydroponic vegetables, and the remaining small part is filled into the fish pond 7. The water after hydroponic vegetables are discharged; the fish in the fish pond 7 have normal metabolism, and the nitrogen and phosphorus substances in the water body gradually increase. After returning to the front first regulating tank 2, it flows into the trickling filter tank for treatment again, and when water is injected into the fish pond 7, the newly injected water body is flushed in along the horizontal line direction of the liquid surface inside the fish pond 7. This effectively avoids the problem of sediment and humus at the bottom of the fish pond 7 floating up when water is injected into the fish pond 7, causing water pollution, thereby affecting the normal growth of the fry.

[0042] A first floating plate 102 is provided inside the fish pond 7. By utilizing the floating effect of the first floating plate 102, the sliding cooperation between the slider 106 and the slide rod 105, and the hinge effect between the slider 106 and the first floating plate 102 and the connecting rod 107, the water outlet pipe 103 on the top of the first floating plate 102 can always change with the change of the liquid level inside the fish pond 7, thereby ensuring that the water body can always rush into the fish pond 7 along the horizontal line direction of the liquid level inside the fish pond 7 when discharging water, further preventing the occurrence of water pollution caused by the sediment and humus at the bottom of the fish pond 7.

[0043] At the same time, in the process of water rushing into the fish pond 7 along the horizontal line direction of the liquid surface inside the fish pond 7, the garbage leaves on the water surface can be pushed and flow into the net frame 201 with the water flow, thereby achieving the purpose of automatically collecting the garbage leaves and effectively ensuring the water quality inside the fish pond 7. As the liquid surface inside the fish pond 7 continues to rise, the net frame 201 will also rise under the action of the second floating plate 202. Through the blocking effect of the blocking rod 205, the magnet sheet 204 on the blocking net 203 will be separated from the magnet sheet 204 on the connecting piece. At this time, the blocking net 203 will automatically close the net frame 201, thereby preventing the garbage leaves from automatically falling out when the net frame 201 is taken out.

[0044] In addition, a further improvement is that an indicator arrow 9 is fixedly connected to one side of the first floating board 102, and a scale 10 is set on the inner wall of one side of the fish pond 7. The scale 10 indicated by the indicator arrow 9 makes it easy to know the water level of the water body inside the fish pond 7, thereby facilitating the control of the water level.

[0045] In addition, the same or similar element symbols are used to refer to the same or similar parts or steps in the drawings and descriptions as much as possible. The drawings are presented in simplified form and are not drawn to exact scale. For convenience and clarity only, directional terms such as top, bottom, front side, back side, left side, right side, front, back, upward, above, above, below, below, behind, and in front may be used with respect to the drawings. These and similar directional terms should not be construed as limiting the scope of the present disclosure in any way.

Claims

1. A rural domestic sewage trickling filtration treatment and breeding application system, characterized in that: include: A primary sedimentation tank (1) for inflowing sewage, wherein a grid is provided in the primary sedimentation tank (1); A first regulating tank (2) connected to the primary settling tank (1); An assembled trickling filter (3) is connected to the first regulating tank (2) via a lifting pump, wherein a filler is provided in the assembled trickling filter (3), and microorganisms grow on the filler in the form of a biofilm; A reflux lifting well (4) connected to the assembled trickling filter (3); An artificial wetland (5) connected to the return flow lifting well (4); A second regulating pond (6) connected to the artificial wetland (5); A fish pond (7) connected to the second regulating pond (6) through a water inlet assembly, and connected to the first regulating pond (2); The hydroponic vegetable field (8) is connected to the second regulating pool (6).

2. A rural domestic sewage trickling filtration treatment and breeding application system according to claim 1, characterized in that: The ratio of the amount of water flowing out of the second regulating pond (6) to the fish pond (7) and the hydroponic vegetable field (8) is 1:(2-4).

3. A rural domestic sewage trickling filtration treatment and breeding application system according to claim 1, characterized in that: The water inlet assembly comprises a water inlet pipe (101) fixedly connected to the fish pond (7); a first floating board (102) is arranged in the fish pond (7); a water outlet pipe (103) is fixedly connected to the top of the first floating board (102); and a corrugated telescopic pipe (104) is fixedly connected between the water inlet pipe (101) and the water outlet pipe (103).

4. A rural domestic sewage trickling filtration treatment and breeding application system according to claim 2, characterized in that: A first top plate is fixedly connected to the top of the inner cavity of the fish pond (7), a sliding rod (105) is symmetrically fixedly connected to the bottom of the first top plate, a sliding block (106) is slidably connected to the outside of the sliding rod (105), and a connecting rod (107) is hingedly connected between the sliding block (106) and the first floating plate (102) via a hinge.

5. A rural domestic sewage trickling filtration treatment and breeding application system according to claim 1, characterized in that: A net frame (201) is provided in the fish pond (7), a second floating plate (202) is fixedly connected to the net frame (201), and a retaining net (203) is hingedly connected to the net frame (201).

6. A rural domestic sewage trickling filtration treatment and breeding application system according to claim 5, characterized in that: A connecting piece is fixedly connected to the top of the net frame (201), a magnet sheet (204) is fixedly connected to the connecting piece and the retaining net (203), and a retaining rod (205) for resisting the retaining net (203) is fixedly connected to the fish pond (7) via a second top plate.

7. A rural domestic sewage trickling filtration treatment and breeding application system according to claim 3, characterized in that: A guide rod (206) is fixedly connected inside the fish pond (7), and the guide rod (206) is slidably connected to the second floating board (202).

8. A rural domestic sewage trickling filtration treatment and breeding application system according to claim 5, characterized in that: A guide plate (207) is fixedly connected to the screen frame (201).

9. A rural domestic sewage trickling filtration treatment and breeding application system according to claim 6, characterized in that: The magnetic pole directions of the facing surfaces of the magnet pieces (204) on the connecting piece and the blocking net (203) are arranged in opposite directions.

10. A rural domestic sewage trickling filtration treatment and breeding application system according to claim 5, characterized in that: A lifting handle is fixedly connected to the top of the net frame (201).

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