CN113149328A - Mountain village domestic sewage and agricultural non-point source collaborative ecological treatment system - Google Patents

Mountain village domestic sewage and agricultural non-point source collaborative ecological treatment system Download PDF

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Publication number
CN113149328A
CN113149328A CN202110161244.8A CN202110161244A CN113149328A CN 113149328 A CN113149328 A CN 113149328A CN 202110161244 A CN202110161244 A CN 202110161244A CN 113149328 A CN113149328 A CN 113149328A
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ecological
layer
domestic sewage
point source
ridge
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王蕾
魏轩
夏霆
袁芳
吴一凡
王浩
陈东杰
朱玲
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ANHUI PROVINCIAL ACADEMY OF ENVIRONMENTAL SCIENCE
Nanjing Tech University
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ANHUI PROVINCIAL ACADEMY OF ENVIRONMENTAL SCIENCE
Nanjing Tech University
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/14—NH3-N
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/16—Total nitrogen (tkN-N)
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/18—PO4-P
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • C02F3/327—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants

Abstract

The invention discloses a mountain village domestic sewage and agricultural non-point source collaborative ecological treatment system, which is characterized in that rural domestic sewage which is subjected to harmless treatment and meets the water quality requirement of agricultural irrigation is purified by a second ecological ditch and a front ridge by utilizing the height difference of the mountain village terrain and the farmland terrain, and is reused for agricultural and forestry irrigation and further purified to reduce the domestic pollution; the multi-stage process combination of the sedimentation pond, the first ecological ditch, the post-arranged ridge and the ecological pond is adopted to purify the surface runoff of the farmland, and the agricultural non-point source pollution is reduced; the cooperative ecological treatment system is designed for adapting to the mountainous-village terrain, the mountainous-village domestic sewage and the agricultural non-point source pollution production and drainage characteristics, on one hand, the rural domestic sewage can be promoted to be used for agriculture and forestry irrigation, the domestic sewage is further purified, the application amount of chemical fertilizers is reduced, and the drainage pollution is reduced; on the other hand, agricultural runoff is treated, agricultural non-point source pollution is reduced, and the ecological environment is protected.

Description

Mountain village domestic sewage and agricultural non-point source collaborative ecological treatment system
Technical Field
The invention relates to a mountain village domestic sewage and agricultural non-point source collaborative ecological treatment system, and belongs to the field of sewage treatment.
Background
The domestic sewage in the mountainous village is discharged dispersedly, and most of the domestic sewage is not provided with a perfect sewage collecting system and a matched sewage treatment facility; due to factors such as fertilization, the non-point source pollution of the mountain village agriculture is generally serious. The daily change coefficient of water consumption of residents in the mountainous area is large, the concentration change of the discharged water quality is large, the operation management technology and experience are lacked, and the mountainous area sewage needs to be treated by a simple, convenient and effective treatment method. In addition, the domestic sewage in the mountain village has no chemical toxic and harmful pollution and is mostly discharged in a small scale. Most of the mountain village areas are agriculture and forestry lands and residences which are distributed in a staggered mode, the height difference of the land is large, the requirements for fertilizer and water of the agriculture and forestry lands are large, and domestic sewage can be reused for supplementing water for the agriculture and forestry lands after meeting the agriculture recharge standard through simple processes and harmless treatment.
For a long time, China has the problems that rural sewage is difficult to collect, and sewage discharged from a septic tank is difficult to treat, rural domestic sewage is discharged randomly and the like after toilet engineering is changed. At present, the combined process of A/O + artificial wetland is one of the common treatment methods of rural sewage, but for rural areas in mountainous areas, the topography and the terrain are complex, the construction difficulty is high, and the artificial wetland with large floor area is not suitable for the rural areas in mountainous areas. If the domestic sewage is recycled for agriculture and forestry irrigation after harmless treatment, on one hand, the nutrient components such as C, N, P in the sewage can be reduced and utilized by an agriculture and forestry land system to purify the sewage and reduce the cost of sewage advanced treatment, and on the other hand, the application amount of chemical fertilizers can be reduced to reduce the agricultural non-point source pollution.
China is a big agricultural country, and in recent years, rapid development of agriculture also brings a plurality of problems of non-point source pollution of agriculture and forestry, damage of rural ecological environment and the like. Agricultural non-point source pollution mainly comes from various aspects such as water and soil loss, pesticide and fertilizer loss, surface runoff, livestock and poultry breeding wastewater discharge and the like, and the proportion of the agricultural non-point source pollution to water pollution is continuously increased. Among them, nutrient loss in rural plantation production is a key factor causing excessive nutrient discharge to water body and eutrophication of adjacent water body. Therefore, the method for constructing the simple, convenient and feasible method for cooperatively treating the rural domestic sewage and the agricultural non-point source and promoting the efficient utilization of water resources has important significance.
Disclosure of Invention
The invention aims to provide a mountainous-village domestic sewage and agricultural non-point source collaborative ecological treatment system, which comprises the steps of treating rural domestic sewage and reusing the rural domestic sewage in agricultural irrigation, and designing a treatment system to intercept agricultural non-point source pollutants, so that the domestic sewage and agricultural non-point source collaborative ecological treatment is achieved.
The invention discloses a mountain village domestic sewage and agricultural non-point source collaborative ecological treatment system, which comprises: the rural domestic sewage which is subjected to harmless treatment and meets the water quality requirement of agricultural irrigation is purified by using the height difference of the topography of the mountainous village and the topography of a farmland and adopting a second ecological ditch and a front ridge and is reused for agricultural and forestry irrigation (paddy field, dry land or forest land) and further purified to reduce the domestic pollution; the multi-stage process combination of the sedimentation pond, the first ecological ditch, the post-arranged ridge and the ecological pond is adopted to purify the surface runoff of the farmland, and the agricultural non-point source pollution is reduced; the design is a function-strengthened ecological ridge, wherein fillers which are easily obtained from local materials, such as gravel, broken stone, broken bricks and the like, can be placed in a ridge body, and other reinforced water quality purification fillers, such as activated carbon and the like, can be placed according to requirements, recycled domestic sewage and agricultural non-point source return water are collected and discharged into an ecological pond through a bottom water collecting pipe after being treated by the fillers, and finally are discharged or recycled. The cooperative ecological treatment system is designed for adapting to the mountainous-village terrain, the mountainous-village domestic sewage and the agricultural non-point source pollution production and drainage characteristics, on one hand, the rural domestic sewage can be promoted to be used for agriculture and forestry irrigation, the domestic sewage is further purified, the application amount of chemical fertilizers is reduced, and the drainage pollution is reduced; on the other hand, agricultural runoff is treated, agricultural non-point source pollution is reduced, and the ecological environment is protected.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a mountainous village domestic sewage and agricultural non-point source collaborative ecological treatment system comprises a farmland, and the ecological treatment system comprises a second ecological ditch, a front ridge, a sedimentation pond, a first ecological ditch, a rear ridge and an ecological pond, wherein the second ecological ditch overflows into the front ridge, the front ridge pumps a water source through a pump to irrigate crops in the farmland, and water overflowing from the farmland is sequentially connected with the sedimentation pond and the first ecological ditch through drainage ditches; the outer side of the first ecological ditch is provided with a post ridge, and the first ecological communication is sequentially connected with the post ridge and the ecological pond through pipelines.
Furthermore, leading ridge includes soil horizon and intensive processing layer, is equipped with intensive processing layer in the soil horizon, and the ecological ditch of second sets up in intensive processing layer front side, and the ecological ditch lateral wall upper edge of second gets into the intensive processing layer top through the inlet tube.
Furthermore, the rear ridge comprises a soil layer and a strengthening treatment layer, the strengthening treatment layer is arranged in the soil layer and is arranged on the outer side of the first ecological ditch, and the lower edge of the side wall of the first ecological ditch enters the top of the strengthening treatment layer through a water inlet pipe.
Furthermore, an overflow weir is arranged at the tail end of the first ecological ditch, and the tail end of the first ecological ditch is connected with the ecological pond through the overflow weir.
Furthermore, herbaceous soil-fixing plants are planted on the soil layer.
Further, the strengthening treatment layer comprises a filler layer and a bearing layer; the packing layer is arranged above the bearing layer, and a water collecting pipe is arranged in the bearing layer.
Furthermore, two sides of the water collecting pipe are perforated at a position which is 45 degrees downwards with the horizontal direction, the diameter of the round hole is 1cm, and the center distance between the two holes is 10 cm.
Further, the outside of the strengthening treatment layer is wrapped by HDPE film.
Furthermore, the packing layer is any one of gravel, broken stone, broken bricks, ceramsite and activated carbon; the particle size of the packing layer is 1-2 cm; the bearing layer is any one of gravel, broken stone and broken bricks; the grain diameter of the supporting layer is 4-8 cm.
Further, the width of the filler layer is 60-80cm, the thickness is 30-40cm, and the upper part is covered with soil for 30-50 cm; the width of the supporting layer is 60-80cm, and the thickness is 20-30 cm.
Purifying the domestic sewage of villages in the mountainous area after harmless treatment by a second ecological ditch and a front ridge, and reusing the sewage for agriculture and forestry irrigation (paddy field, dry land or forest land); the agricultural surface runoff is purified by combining the multistage processes of the sedimentation pond, the first ecological ditch, the post-arranged ridge and the ecological pond, so that the agricultural non-point source pollution is reduced; designing a function-enhanced ecological ridge. Planting herbaceous soil-fixing plants on the top of the ridge, placing water treatment fillers in the ridge body, wherein the fillers can be easily obtained in local areas in rural areas, such as gravel, broken stones, broken bricks and the like, and can also be placed with functional fillers such as activated carbon and the like for enhancing water quality purification, sewage flows to a water collecting pipe at the bottom after being treated by the fillers and is discharged into an ecological pond, and finally is discharged or is recycled and irrigated through a farmland irrigation system.
The daily maximum water discharge is determined by investigating the production and drainage characteristics of villages, and engineering quantities such as a farm irrigation recycling treatment area, a second ecological ditch, a front ridge and the like can be designed according to the scale of a village sewage collection treatment system, domestic sewage after harmless treatment is treated by the second ecological ditch, overflows and distributes water into the front ridge, and treated tail water is recycled and irrigated by a farmland irrigation system.
The method is characterized in that a field drainage ditch is reformed by utilizing the special terrain height difference of mountainous areas and the terrain structures of a ditch pool and a ridge, so that agricultural surface runoff is collected in a sedimentation pool, purified by a first ecological ditch and a post ridge and then enters the ecological pool, the ecological pool can further purify runoff rainwater and agricultural return water, and the ecological pool can also be used as a reservoir for rainwater and return water for recycling.
The volume of the sedimentation pond is determined according to the area of a farmland and the initial rainfall of the former 15 minutes of the first five-year meeting in the local area, the length of the front ridge is determined according to the highest drainage of the local area day, and the length of the rear ridge is determined according to the pollution condition of the local area source and the initial rainfall of the former 15 minutes of the first five-year meeting in the local area.
The treatment area of each post ridge is not more than 1500m2Preferably, the number of the post ridges in one system is determined by the area of the farmland in the system.
The water discharged from the post ridge enters an ecological pond, emergent aquatic plants such as reed and calamus are planted around the ecological pond, and the discharged water can be recycled through an irrigation system or flows into a nearby natural water body.
Planting soil-fixing herbaceous plants such as crow's foot, bermudagrass and the like at the top and the side of the post ridge.
Compared with the prior art, the invention has the following beneficial effects because the technology is adopted:
the domestic sewage is purified by the second ecological ditch and the front ridge and then is used for farmland irrigation, so that the sewage is treated, the treatment cost is reduced, the nutrients in the domestic sewage are effectively utilized, the use of chemical fertilizers is reduced, and the pollution emission is reduced.
The invention adopts a combined system of a sedimentation pond, a first ecological ditch, a post-ridge, an ecological pond and the like to purify agricultural return water and runoff pollution, reduce agricultural non-point source pollution and promote irrigation recycling of the agricultural return water.
Drawings
FIG. 1 is a schematic plan view of a mountain village domestic sewage and agricultural non-point source cooperative ecological treatment system;
FIG. 2 is a flow chart of a mountain village domestic sewage and agricultural non-point source cooperative ecological treatment system;
FIG. 3 is a cross-sectional view of the leading ridge;
FIG. 4 is a cross-sectional view of a rear ridge;
in the figure: 1. the device comprises a harmless treatment device, 2, a front ridge, 3, a drainage ditch, 4, a sedimentation pond, 5, a first ecological ditch, 6, a rear ridge, 7, an ecological pond, 8, a second ecological ditch, 9, a soil layer, 10, a packing layer, 11, a bearing layer, 12, a water collecting pipe, 13, a farmland, 14, an overflow weir, 15, plants, 16, an HDPE film, 17 and a water inlet pipe.
Detailed Description
The invention is further elucidated with reference to the drawings and the detailed description.
Example 1:
a rural domestic sewage and agricultural non-point source collaborative ecological treatment system comprises a farmland 13, the ecological treatment system comprises a second ecological ditch 8, a front ridge 2, a sedimentation pond 4, a first ecological ditch 5, a rear ridge 6 and an ecological pond 7, the second ecological ditch 8 overflows into the front ridge 2, the front ridge 2 pumps a water source through a pump to irrigate crops in the farmland 13, and water overflowing from the farmland 13 is sequentially connected with the sedimentation pond 4 and the first ecological ditch 5 through a drainage ditch 3; a post ridge 6 is arranged on the outer side of the first ecological ditch 5, and the first ecological ditch 5 is sequentially connected with the post ridge 6 and the ecological pond 7 through pipelines.
Leading ridge 2 includes soil horizon 9 and intensive processing layer, is equipped with the intensive processing layer in the soil horizon 9, and ecological ditch 8 of second sets up in the intensive processing layer front side, and the ecological ditch 8 lateral wall upper edge of second gets into the intensive processing layer top through inlet tube 17.
The post ridge 6 comprises a soil layer 9 and a strengthening treatment layer, the strengthening treatment layer is arranged in the soil layer 9 and is arranged outside the first ecological ditch 5, and the lower edge of the side wall of the first ecological ditch 5 enters the top of the strengthening treatment layer through a water inlet pipe 17.
The strengthening treatment layer comprises a filler layer 10 and a bearing layer 11; the packing layer 10 is arranged above the bearing layer 11, and a water collecting pipe 12 is arranged in the bearing layer 11. Two sides of the water collecting pipe 12 are perforated at positions which are 45 degrees downward with the horizontal direction, the diameter of a round hole is 1cm, and the center distance between the two holes is 10 cm.
The outer sides of the strengthening treatment layers (the filler layer 10 and the supporting layer 11) are wrapped by HDPE films 16; the HDPE film 16 is a PE film and geotextile.
The packing layer 10 is any one of gravel, broken stone, broken brick, ceramsite and active carbon; the particle size of the filler layer 10 is 1-2 cm.
The bearing layer 11 is any one of gravel, broken stone and broken bricks; the grain diameter of the supporting layer 11 is 4-8 cm.
The width of the filler layer 10 is 60-80cm, the thickness is 30-40cm, and the upper part is covered with soil 30-50 cm; the width of the supporting layer 11 is 60-80cm, and the thickness is 20-30 cm.
The end of the first ecological ditch 5 is provided with an overflow weir 14, and the end of the first ecological ditch 5 is connected with the ecological pond 7 through the overflow weir 14.
Herbaceous soil-fixing plants 15, such as common plants 15 of crowtoe, bermudagrass and the like are planted on the soil layer 9.
The sewage treated by the ecological treatment system is directly discharged into a water body or pumped by a pump to irrigate crops in a farmland 13.
As shown in attached figure 1, the domestic sewage is treated by a harmless treatment device 1 and then enters a second ecological ditch 8 and a front ridge 2, and the effluent is recycled and irrigated by an irrigation system of a farmland 13; rainfall in the farmland 13 forms rainwater, the rainwater flows into the sedimentation pond 4 through the surface runoff and the drainage ditch 3, then the runoff flows into the rear ridge 6 through the first ecological ditch 5, the sewage runoff treated by the rear ridge 6 enters the ecological pond 7, and the water in the ecological pond 7 can be selectively recycled and can also be discharged to nearby natural water bodies.
As shown in attached figures 3 and 4, the two ridges designed by the invention are composed of six parts except different burying depths, and comprise a soil layer 9, a packing layer 10, a water collecting pipe 12, herbaceous soil-fixing plants 15 and a supporting layer 11, wherein the width of the packing layer 10 of the ridge is 60-80cm, the thickness of the packing layer is 30-40cm, the upper part of the packing layer is covered with soil for 30-50cm, the supporting layer 11 is arranged below the packing layer 10, the width of the supporting layer 11 is the same as that of the packing layer 10, the thickness of the supporting layer is 20-30cm, the water collecting pipe 12(DN150-DN250) is distributed in the supporting layer 11, the positions of two sides of the water collecting pipe 12 and the horizontal direction are downwards perforated at 45 degrees, the diameter of the circular holes is 1cm, the center distance of the holes is 10cm, sewage filtered by the packing layer 10 and the supporting layer 11 enters the water collecting pipe 12 to be collected, and water in the water collecting pipe 12 is sent to the system to be subsequently treated.
The packing layer 10 is made of gravel, broken stone, broken bricks and the like which are common in rural areas, the particle size is 1-2cm, and if special requirements exist, functional reinforced packing such as ceramsite, activated carbon and the like can be adopted according to the water body purification requirement; the material of the supporting layer 11 adopts gravels, broken bricks and the like which are common in rural areas, and the grain diameter is 4-8 cm.
The front side of the front ridge 2 is provided with a second ecological ditch 8, the upper edge of the side wall of the second ecological ditch 8 is provided with water outlet holes every 2 meters and is connected with the top of the packing layer 10 in the ridge through a water inlet pipe 17, and the water inlet pipe 17 of the front ridge 2 is positioned at the water outlet holes on the upper edge of the side wall of the second ecological ditch 8 and overflows to enter water.
The post ridge 6 is arranged outside the first ecological ditch 5, water outlet holes are formed in the lower edge of the side wall of the first ecological ditch 5 every 2 meters, a water inlet pipe 17 of the first ecological ditch 5 is positioned in the lower edge of the side wall of the first ecological ditch 5, and initial runoff is guaranteed to flow into the post ridge 6 through the water inlet pipe 17 to be treated; the overflow weir 14 is arranged at the tail end of the first ecological ditch 5, and after the rainfall is increased to a certain degree, later stage runoff flows into the subsequent ecological pond 7 through the first ecological ditch 5 and the overflow weir 14.
Example 2:
the daily maximum water discharge of a certain mountain village is known to be 20m3And d, designing a domestic sewage and agricultural non-point source cooperative ecological treatment system according to the embodiment, and treating the sewage by an A/O process and then entering the front ridge 2 through the second ecological ditch 8. 1 front ridge with length of 10m, 10 packing layer with width of 80cm and height of 40cm, wherein 10cm of lower part is broken bricks, 20cm of middle part is gravels, 10cm of upper part is fine sand, 30cm of upper part of packing layer 10 is covered with soil, and 15 soil-fixing plants are bermudagrass. The rear ridge is 1 and 20m long, and the rest of the ridge has the same structure as the front ridge 2. The area of the selected area is 1100m2Runoff coefficient of 0.6, rainfall intensity of 349.2L/(s.ha), area of sedimentation pond 4 of 21.2m2Average depth of about 1m, and area of ecological pond 7 of 30m2。
Selecting a rainfall weather, taking a water sample in the sedimentation pond 4 for detection, measuring the water quality to be 2mg/L of ammonia nitrogen, 3.4mg/L of total nitrogen, 0.4mg/L of total phosphorus and 12.8mg/L of COD, taking ridge effluent for detection, and measuring the water quality to be 1.1mg/L of ammonia nitrogen, 1.6mg/L of total nitrogen, 0.17mg/L of total phosphorus and 7.1mg/L of COD. It can be seen that the ammonia nitrogen removal rate is 45%, the total nitrogen removal rate is 52.9%, the total phosphorus removal rate is 57.5%, and the COD removal rate is 44.5%.
Example 3:
the daily maximum water discharge of a certain mountain village is known to be 15m3And d, designing a domestic sewage and agricultural non-point source cooperative ecological treatment system according to the embodiment, and treating the sewage by an A/O process and then entering the front ridge 2 through the second ecological ditch 8. 1 front ridge with length of 7.5m, a packing layer 10 with width of 70cm and height of 35cm, wherein 10cm of the lower part uses broken bricks, 15cm of the middle part uses gravels, 10cm of the upper part uses fine sand, the upper part of the packing layer 10 is covered with soil with thickness of 40cm, and 15 soil-fixing plants are selected from crow's feet. The rear ridges are 2 and each ridge is 20m long, and the rest structures are the same as the front ridge 2. The area of the selected area is 2800m2Runoff coefficient of 0.5, rainfall intensity of 286.5L/(s.ha), area of settling pond 4 of 39.6m2Average depth of about 1m, and area of ecological pond 7 of 60m2。
Selecting a rainfall weather, taking a water sample in the sedimentation pond 4 for detection, measuring the water quality to be 1.8mg/L of ammonia nitrogen, 4.1mg/L of total nitrogen, 0.52mg/L of total phosphorus and 11.3mg/L of COD, taking ridge effluent for detection, and measuring the water quality to be 0.75mg/L of ammonia nitrogen, 2mg/L of total nitrogen, 0.25mg/L of total phosphorus and 5.96mg/L of COD. It can be found that the ammonia nitrogen removal rate is 58.3%, the total nitrogen removal rate is 48.8%, the total phosphorus removal rate is 51.3%, and the COD removal rate is 47.2%.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention should be defined by the claims, and equivalents including technical features of the claims, i.e., equivalent modifications within the scope of the present invention.

Claims (10)

1. The utility model provides a ecological processing system is in coordination with agricultural non-point source in mountain village domestic sewage, includes farmland (13), its characterized in that: the ecological treatment system comprises a second ecological ditch (8), a front ridge (2), a sedimentation pond (4), a first ecological ditch (5), a rear ridge (6) and an ecological pond (7), wherein the second ecological ditch (8) overflows into the front ridge (2), the front ridge (2) pumps a water source to irrigate crops in a farmland (13) through a pump, and water overflowing from the farmland (13) is sequentially connected with the sedimentation pond (4) and the first ecological ditch (5) through a drainage ditch (3); a post ridge (6) is arranged on the outer side of the first ecological ditch (5), and the first ecological ditch (5) is sequentially connected with the post ridge (6) and the ecological pond (7) through pipelines.
2. The mountain village domestic sewage and agricultural non-point source cooperative ecological treatment system according to claim 1, characterized in that: leading ridge (2) include soil horizon (9) and intensive processing layer, are equipped with intensive processing layer in soil horizon (9), and intensive processing layer sets up in second ecological ditch (8) rear side, and second ecological ditch (8) lateral wall upper edge gets into intensive processing layer top through inlet tube (17).
3. The mountain village domestic sewage and agricultural non-point source cooperative ecological treatment system according to claim 1, characterized in that: the postposition ridge (6) comprises a soil layer (9) and a strengthening treatment layer, wherein the strengthening treatment layer is arranged in the soil layer (9), the strengthening treatment layer is arranged on the outer side of the first ecological ditch (5), and the lower edge of the side wall of the first ecological ditch (5) enters the top of the strengthening treatment layer through a water inlet pipe (17).
4. The mountain village domestic sewage and agricultural non-point source cooperative ecological treatment system according to claim 3, characterized in that: the end of the first ecological ditch (5) is provided with an overflow weir (14), and the end of the first ecological ditch (5) is connected with the ecological pond (7) through the overflow weir (14).
5. The mountain village domestic sewage and agricultural non-point source cooperative ecological treatment system according to claim 2 or 3, wherein: herbaceous soil-fixing plants (15) are planted on the soil layer (9).
6. The mountain village domestic sewage and agricultural non-point source cooperative ecological treatment system according to claim 2 or 3, wherein: the strengthening treatment layer comprises a filler layer (10) and a bearing layer (11); the packing layer (10) is arranged above the bearing layer (11), and the water collecting pipes (12) are distributed in the bearing layer (11).
7. The mountain village domestic sewage and agricultural non-point source cooperative ecological treatment system according to claim 6, characterized in that: two sides of the water collecting pipe (12) are perforated at a position which is 45 degrees downwards with the horizontal direction, the diameter of the round hole is 1cm, and the center distance between the two holes is 10 cm.
8. The mountain village domestic sewage and agricultural non-point source cooperative ecological treatment system according to claim 6, characterized in that: the reinforcing treatment layer is wrapped with HDPE film (16) on the outside.
9. The mountain village domestic sewage and agricultural non-point source cooperative ecological treatment system according to claim 6, characterized in that: the packing layer (10) is any one of gravel, broken stone, broken bricks, ceramsite and activated carbon; the particle size of the packing layer (10) is 1-2 cm; the bearing layer (11) is any one of gravel, broken stone and broken bricks; the grain diameter of the supporting layer (11) is 4-8 cm.
10. The mountain village domestic sewage and agricultural non-point source cooperative ecological treatment system according to claim 6, characterized in that: the width of the filler layer (10) is 60-80cm, the thickness is 30-40cm, and the upper part is covered with soil 30-50 cm; the width of the supporting layer (11) is 60-80cm, and the thickness is 20-30 cm.
CN202110161244.8A 2021-02-05 2021-02-05 Mountain village domestic sewage and agricultural non-point source collaborative ecological treatment system Pending CN113149328A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993023338A1 (en) * 1992-05-13 1993-11-25 Kensaku Abe Purifying apparatus
US8877048B1 (en) * 2011-09-02 2014-11-04 Samuel Owings Cascading system of floodway stormwater containment basins
CN108862930A (en) * 2018-08-06 2018-11-23 中国电建集团华东勘测设计研究院有限公司 Ecological farm village sewage circulating treating system
CN209065541U (en) * 2018-10-16 2019-07-05 水利部中国科学院水工程生态研究所 A kind of multi-stage eco-ponds system for collecting processing suitable for small watershed in mountain non-point pollution
CN110776106A (en) * 2019-12-12 2020-02-11 厦门理工学院 Hierarchical ecological treatment system for treating rural domestic sewage and rain sewage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993023338A1 (en) * 1992-05-13 1993-11-25 Kensaku Abe Purifying apparatus
US8877048B1 (en) * 2011-09-02 2014-11-04 Samuel Owings Cascading system of floodway stormwater containment basins
CN108862930A (en) * 2018-08-06 2018-11-23 中国电建集团华东勘测设计研究院有限公司 Ecological farm village sewage circulating treating system
CN209065541U (en) * 2018-10-16 2019-07-05 水利部中国科学院水工程生态研究所 A kind of multi-stage eco-ponds system for collecting processing suitable for small watershed in mountain non-point pollution
CN110776106A (en) * 2019-12-12 2020-02-11 厦门理工学院 Hierarchical ecological treatment system for treating rural domestic sewage and rain sewage

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