Purifying and recycling system for non-point source pollution treatment
By introducing components such as ecological ditches, artificial wetlands, and ecological water storage ponds into pond and farmland drainage systems, combined with aquatic plants and equipment, multi-stage purification and reuse of effluent are achieved, solving the problems of non-point source pollution and low water resource utilization, and realizing zero discharge of pollutants and efficient recycling of resources.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN ZHONGKE HYDROBOLOGY ENVIRONMENTAL ENG
- Filing Date
- 2025-06-05
- Publication Date
- 2026-05-12
AI Technical Summary
Wastewater from pond aquaculture and farmland discharges, if not treated for purification, easily leads to non-point source pollution, causing serious damage to the rural water environment, while also resulting in low water resource utilization.
Design a purification and reuse system, including ecological ditches, artificial wetlands, ecological storage ponds and circulating branch canals. By planting aquatic plants and setting up reoxygenation devices, flow guide walls and solar aerators, the system can achieve multi-stage purification and storage of effluent. The purified water can then be pumped back to farmland and aquaculture ponds using a booster pump station.
It effectively purifies wastewater, solves non-point source pollution problems, improves water resource utilization, achieves zero discharge of pollutants and recycling of resources, and enhances the stability and self-repair capacity of the ecosystem.
Smart Images
Figure CN224226820U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of wastewater treatment, specifically relating to a purification and reuse system for treating non-point source pollution, which is applicable to the prevention and control of agricultural non-point source pollution. Background Technology
[0002] Pond aquaculture and farmland require drainage during the high-water season. In agricultural planting, large amounts of pesticides and fertilizers are used improperly; in pond aquaculture, large quantities of feed are given, leading to high accumulations of uneaten feed and feces. If the wastewater discharged from farmland or aquaculture ponds is not treated, it can easily cause non-point source pollution, posing a serious threat to the rural water environment.
[0003] Pond aquaculture and farmland require water replenishment during the dry season. If the wastewater discharged from pond aquaculture and farmland can be purified and reused, it will greatly improve water resource utilization while controlling non-point source pollution. Utility Model Content
[0004] This invention addresses the aforementioned problems in the existing technology by providing a system for treating, purifying, and reusing non-point source pollution.
[0005] The above-mentioned objectives of this utility model are achieved through the following technical means:
[0006] A purification and reuse system for treating non-point source pollution includes farmland and aquaculture ponds. The drainage outlets of the farmland and the aquaculture ponds are connected to the inlets of tributaries of an ecological ditch. The drainage outlets of the tributaries are connected to the inlet of a main ecological ditch. The outlet of the main ecological ditch is connected to the inlet of an artificial wetland. The outlet of the artificial wetland is connected to the inlet of an ecological storage tank. The pumping outlet of a booster pump station is located in the ecological storage tank, and the outlet of the booster pump station is located in a circulating branch canal. Multiple pumps are installed in the circulating branch canal. The outlets of some pumps are located in the farmland, and the outlets of the remaining pumps are located in the aquaculture ponds.
[0007] Emergent plants are planted on both sides of the main ecological ditch, and submerged plants are planted at the bottom of the main ecological ditch. Oxygenation devices are installed at intervals inside the main ecological ditch.
[0008] The constructed wetland includes a wetland sedimentation zone and a wetland purification zone. The inlet of the wetland sedimentation zone is the inlet of the constructed wetland, the outlet of the wetland sedimentation zone is connected to the inlet of the wetland purification zone, and the outlet of the wetland purification zone is the outlet of the constructed wetland.
[0009] The wetland purification area is equipped with multiple flow guide walls, which are staggered to form a serpentine flow channel.
[0010] The top width of the guide wall is 1.5 to 2 meters, and the slope ratio is 1:2.
[0011] The wetland purification area is planted with submerged plants, floating-leaved plants and emergent plants. The planting area of submerged plants accounts for 60-70% of the wetland purification area, the planting area of emergent plants accounts for 6-10% of the wetland purification area, and the planting area of floating-leaved plants accounts for 1-2% of the wetland purification area.
[0012] Solar-powered aerators are installed in the wetland purification area.
[0013] The ecological water storage pond is planted with submerged plants.
[0014] Submerged and emergent plants are planted in the circulating branch canals.
[0015] The submerged plants are Vallisneria natans, Hydrilla verticillata, Myriophyllum spicatum, or Potamogeton malaianum; the floating-leaved plants are water lilies; and the emergent plants are canna lilies, irises, reeds, Phragmites australis, or Thalia dealbata.
[0016] Compared with the prior art, the utility model has the following advantages:
[0017] 1. Aquatic plants are planted in the main ecological ditch, artificial wetland, ecological water storage pond and circulating branch canal, which can effectively purify the tailwater and solve the problem of non-point source pollution;
[0018] 2. Set up a wetland sedimentation zone and a wetland purification zone in the constructed wetland. The wetland sedimentation zone can effectively reduce the silt and suspended solids in the incoming water, while the wetland purification zone can be equipped with multiple guide walls to form a serpentine flow channel, which can prolong the hydraulic residence time and enhance the purification effect.
[0019] 3. The purified wastewater is stored in an ecological water storage pond. When farmland and aquaculture ponds need irrigation, the purified wastewater is transported from the ecological water storage pond to the circulation branch canal via a booster pump station. The water in the circulation branch canal is then re-injected into the farmland and aquaculture ponds, thus realizing the recycling of purified wastewater. Attached Figure Description
[0020] Figure 1 This is a system flowchart of this utility model;
[0021] Figure 2 This is a schematic diagram of the structure of this utility model;
[0022] Figure 3 This is a schematic diagram of an artificial wetland structure;
[0023] Among them, 1-farmland, 2-breeding pond, 3-sewage collection module, 4-sewage treatment and purification module, 5-water storage module, 6-reuse module, 7-ecological ditch tributary, 8-ecological main ditch, 9-artificial wetland, 91-wetland sedimentation area, 92-wetland purification area, 10-ecological water storage pond, 11-lifting pump station, 12-circulating branch canal. Detailed Implementation
[0024] The present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.
[0025] Example 1:
[0026] like Figure 1 and Figure 2 As shown, a purification and reuse system for non-point source pollution treatment includes farmland 1 and aquaculture pond 2, a sewage collection module 3, a sewage treatment and purification module 4, a water storage module 5, and a reuse module 6. The drainage outlets of farmland 1 and aquaculture pond 2 are respectively connected to the inlet of sewage collection module 3. The drainage outlet of sewage collection module 3 is connected to the inlet of sewage treatment and purification module 4. The drainage outlet of sewage treatment and purification module 4 is connected to the inlet of water storage module 5. The water in water storage module 5 is transported to farmland 1 and aquaculture pond 2 through reuse module 6.
[0027] The wastewater discharged from farmland 1 and aquaculture pond 2 flows into water storage module 5 through wastewater collection module 3 and wastewater treatment and purification module 4. When farmland 1 and aquaculture pond 2 need irrigation, reuse module 6 transports the water stored in water storage module 5 to farmland 1 and aquaculture pond 2.
[0028] The sewage collection module 3 includes ecological ditch tributaries 7 distributed around farmland 1 and aquaculture pond 2. The drainage outlets of farmland 1 and aquaculture pond 2 are respectively connected to the inlet of ecological ditch tributaries 7.
[0029] The wastewater treatment and purification module 4 includes an ecological main ditch 8 and an artificial wetland 9. The outlet of the ecological ditch tributary 7 is connected to the inlet of the ecological main ditch 8, so that the ecological ditch tributary 7 and the ecological main ditch 8 are connected. This enables the outlet of the wastewater collection module 3 to be connected to the inlet of the wastewater treatment and purification module 4, and the outlet of the ecological main ditch 8 to be connected to the inlet of the artificial wetland 9.
[0030] In some embodiments, emergent plants are planted on both sides of the main ecological ditch 8, and submerged plants are planted at the bottom of the main ecological ditch 8. Emergent and submerged plants can effectively absorb nitrogen and phosphorus pollutants in the water and effectively purify the water quality. Reoxygenation devices are installed at intervals in the main ecological ditch 8. The reoxygenation devices can increase the oxygen content in the water and effectively improve the ecological self-purification capacity of the main ecological ditch 8.
[0031] The wastewater undergoes preliminary purification in the main ecological ditch 8, and then enters the artificial wetland 9 for further purification.
[0032] In some embodiments, the artificial wetland 9 is constructed using abandoned aquaculture ponds, paddy fields, or depressions surrounding farmland 1 or aquaculture pond 2; such as Figure 3 As shown, the constructed wetland 9 is provided with a wetland sedimentation zone 91 and a wetland purification zone 92. The inlet of the wetland sedimentation zone 91 is the inlet of the constructed wetland 9, the outlet of the wetland sedimentation zone 91 is connected to the inlet of the wetland purification zone 92, and the outlet of the wetland purification zone 92 is the outlet of the constructed wetland 9.
[0033] Furthermore, multiple guide walls are installed within the wetland purification zone 92. These guide walls are staggered to form a serpentine flow channel, which can extend the hydraulic retention time and prevent the formation of stagnant water zones, thereby enhancing the purification capacity of the wetland purification zone 92. In this embodiment, the top width of the guide walls is 1.5–2 m, and the slope ratio is 1:2.
[0034] The main function of wetland sedimentation zone 91 is to reduce the silt and suspended solids in the incoming water and improve water transparency. To ensure the normal sedimentation function of wetland sedimentation zone 91 and to minimize its impact on wetland purification zone 92, the settled suspended solids and sludge in the wetland sedimentation zone need to be cleaned regularly. Based on past engineering experience, cleaning once a year is sufficient.
[0035] Submerged plants, floating-leaved plants, and emergent plants are planted in wetland purification zone 92. The planting area of submerged plants accounts for 60-70% of the area of wetland purification zone 92, the planting area of emergent plants accounts for 6-10% of the area of wetland purification zone 92, and the planting area of floating-leaved plants accounts for 1-2% of the area of wetland purification zone 92. Planting aquatic plants (including submerged plants, floating-leaved plants, and emergent plants) in wetland purification zone 92 can reduce the concentration of pollutants such as BOD, ammonia nitrogen, and phosphorus in the water body, while creating a landscape effect.
[0036] In some embodiments, a solar-powered aerator is installed in the wetland purification zone 92, which can increase the oxygen content in the water and accelerate the biodegradation of organic pollutants, thereby improving water quality.
[0037] In some embodiments, an ecological floating bed is provided in the wetland purification zone 92, and emergent plants are planted on the ecological floating bed, which can further enhance the sewage purification capacity and also improve the landscape effect of the artificial wetland.
[0038] The water storage module 5 includes an ecological water storage tank 10, which is planted with submerged plants to further purify the water. The inlet of the ecological water storage tank 10 is connected to the outlet of the artificial wetland 9.
[0039] The water reuse module 6 includes a booster pump station 11 and a circulating branch canal 12. The pump station 11 has its intake located in the ecological storage pond 10, and its outlet is located in the circulating branch canal 12. The circulating branch canal 12 is equipped with multiple pumps and is built near farmland 1 and aquaculture pond 2. The outlets of some pumps are located in farmland 1, while the outlets of the remaining pumps are located in the aquaculture pond. Submerged and emergent plants are planted in the circulating branch canal 12 to further purify the water.
[0040] During the wet season, the wastewater discharged from farmland 1 and aquaculture pond 2 is purified sequentially through ecological tributary 7, ecological main ditch 8, and artificial wetland 9 before flowing into ecological storage pond 10 for storage. During the dry season, booster pump station 11 transports the purified wastewater from ecological storage pond 11 to circulation branch canal 12, where pumps pump the purified wastewater back into farmland 1 and aquaculture pond 2.
[0041] The above-mentioned submerged plants are Vallisneria natans, Hydrilla verticillata, Myriophyllum spicatum, or Potamogeton malaianus.
[0042] The aforementioned floating-leaved plant is the water lily;
[0043] The aforementioned emergent plants are canna lilies, irises, reeds, variegated reeds, or thaliana.
[0044] In summary, this invention effectively controls non-point source pollution in farmland while also considering the utilization of land resources. The system is stable and reliable in operation, and easy to manage and maintain. It solves the needs for water purification during the wet season and irrigation during the dry season in farming and aquaculture areas. It achieves zero pollution discharge and highly cyclical resource utilization, improving the stability and self-repair capacity of the farmland ecosystem.
[0045] It should be noted that the specific embodiments described in this utility model are merely illustrative examples of the spirit of this utility model. Those skilled in the art to which this utility model pertains can make various modifications or additions to the described specific embodiments or use similar methods to replace them, but without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
Claims
1. A purification and reuse system for treating non-point source pollution, comprising farmland (1) and aquaculture ponds (2), characterized in that, The drainage outlets of farmland (1) and aquaculture pond (2) are connected to the inlet of ecological ditch tributary (7), the drainage outlet of ecological ditch tributary (7) is connected to the inlet of ecological main ditch (8), the outlet of ecological main ditch (8) is connected to the inlet of artificial wetland (9), the outlet of artificial wetland (9) is connected to the inlet of ecological water storage pond (10), the pumping outlet of booster pump station (11) is located in ecological water storage pond (10), the outlet of booster pump station is located in circulating branch ditch (12), and multiple water pumps are installed in circulating branch ditch (12). The outlets of some water pumps are located in farmland (1), and the outlets of the remaining water pumps are located in aquaculture pond (2).
2. The purification and reuse system for treating non-point source pollution according to claim 1, characterized in that, Emergent plants are planted on both sides of the main ecological ditch (8), and submerged plants are planted at the bottom of the main ecological ditch (8). Oxygenation devices are installed at intervals inside the main ecological ditch (8).
3. A purification and reuse system for treating non-point source pollution according to claim 2, characterized in that, The artificial wetland (9) is provided with a wetland sedimentation zone (91) and a wetland purification zone (92). The inlet of the wetland sedimentation zone (91) is the inlet of the artificial wetland (9), the outlet of the wetland sedimentation zone (91) is connected to the inlet of the wetland purification zone (92), and the outlet of the wetland purification zone (92) is the outlet of the artificial wetland (9).
4. A purification and reuse system for treating non-point source pollution according to claim 3, characterized in that, Multiple flow guide walls are installed in the wetland purification area (92), and the flow guide walls are staggered to form a serpentine flow channel.
5. A purification and reuse system for treating non-point source pollution according to claim 4, characterized in that, The top width of the guide wall is 1.5 to 2 meters, and the slope ratio is 1:
2.
6. A purification and reuse system for treating non-point source pollution according to claim 3, characterized in that, The wetland purification area (92) is planted with submerged plants, floating-leaved plants and emergent plants. The planting area of submerged plants in the wetland purification area (92) accounts for 60-70% of the area of the wetland purification area (92), the planting area of emergent plants in the wetland purification area (92) accounts for 6-10% of the area of the wetland purification area (92), and the planting area of floating-leaved plants in the wetland purification area (92) accounts for 1-2% of the area of the wetland purification area (92).
7. A purification and reuse system for treating non-point source pollution according to claim 6, characterized in that, A solar-powered aerator is installed in the wetland purification area (92).
8. A purification and reuse system for treating non-point source pollution according to claim 6, characterized in that, The ecological water storage pond (10) is planted with submerged plants.
9. A purification and reuse system for treating non-point source pollution according to claim 8, characterized in that, Submerged and emergent plants are planted in the circulating branch canal (12).
10. A purification and reuse system for treating non-point source pollution according to claim 9, characterized in that, The submerged plants are Vallisneria natans, Hydrilla verticillata, Myriophyllum spicatum, or Potamogeton malaianum; the floating-leaved plants are water lilies; and the emergent plants are canna lilies, irises, reeds, Phragmites australis, or Thalia dealbata.