CN113200609A - Sunken type zigzag sedimentation channel-composite ecological filtering dam system and culture tail water treatment method - Google Patents
Sunken type zigzag sedimentation channel-composite ecological filtering dam system and culture tail water treatment method Download PDFInfo
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- CN113200609A CN113200609A CN202110535816.4A CN202110535816A CN113200609A CN 113200609 A CN113200609 A CN 113200609A CN 202110535816 A CN202110535816 A CN 202110535816A CN 113200609 A CN113200609 A CN 113200609A
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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
- 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
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2101/00—Nature of the contaminant
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- C02F2101/16—Nitrogen compounds, e.g. ammonia
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Abstract
The invention discloses a sunken zigzag settling channel-composite ecological filtering dam system and a treatment method of culture tail water, and belongs to the technical field of watershed non-point source pollution restoration and clean production. The system consists of a sinking type zigzag sedimentation channel and a plant-microorganism-filter material composite filter dam system; the sunken zigzag sedimentation channel is arranged around the circumference of the aquaculture pond; the composite ecological filtering dam system is distributed on two sides of a drainage ditch communicated with a river channel. The invention relates to a culture tail water treatment technology of a sinking type zigzag sedimentation channel-composite ecological filter dam system, which can reduce the flow velocity of tail water and intercept silt through a sinking zigzag design under the condition of smooth water passing, simultaneously save space and reduce energy consumption, construct an arbuscular mycorrhizal fungi plant-zero-valent iron-carbon sludge-based filter material-composite functional flora filter dam system, form an adsorption-absorption-degradation-regeneration ecological circulation system, and realize the purification of the water quality and the reduction of the water quantity of river tail water.
Description
Technical Field
The invention belongs to the technical field of watershed non-point source pollution restoration and clean production, and particularly relates to a sunken Z-shaped sedimentation channel-composite ecological filter dam system and a culture tail water treatment method.
Background
For a long time, the high-density intensive freshwater aquaculture brings huge pressure to natural water bodies, and pond tail water generally directly enters rivers and lakes without being effectively treated, so that non-point source pollution such as nitrogen, phosphorus and the like is caused. At present, the main treatment technologies of freshwater aquaculture tail water are a three-pond two-dam tail water treatment technology and an artificial wetland tail water treatment technology, wherein the three-pond two-dam technology has more treatment units, aeration is needed, the extra operation and management cost of farmers is increased, the artificial wetland technical filler has no directivity on pollutant removal, and the dephosphorization treatment effect is not ideal for the characteristics that freshwater aquaculture tail water COD is not high and total phosphorus is high. And current freshwater aquaculture tail water treatment technology can't guarantee to realize stable efficiency of getting rid of to the play water quality of water after handling, and when having higher requirements to the peripheral water quality of accomodating, can't guarantee to discharge to reach standard.
Disclosure of Invention
In order to overcome the disadvantages and shortcomings of the prior art, the invention aims to provide a sunken zigzag settling channel-composite ecological filtering dam system and a culture tail water treatment method, so as to solve the problem of non-point source pollution caused by tail water discharge of freshwater culture.
The purpose of the invention is realized by the following scheme:
the sinking type zigzag sedimentation channel-composite ecological filter dam system consists of a sinking type zigzag sedimentation channel and a plant-microorganism-filter material composite filter dam system;
the sunken zigzag sedimentation channel comprises a sedimentation channel, a water distribution channel and a water distribution channel, the sedimentation channel is arranged around the circumference of the aquaculture pond, a plurality of plain concrete filling bodies are sequentially arranged at the bottom of the sedimentation channel along the water flow direction, the plain concrete filling bodies are wedge-shaped, and a permeable brick wall is vertically arranged between every two adjacent plain concrete filling bodies; the sedimentation channel is communicated with a water distribution channel through a water distribution channel, and the water distribution channel is arranged at two sides of the plant-microorganism-filter material composite filter dam system;
the plant-microorganism-filter material composite filter dam system comprises two composite filter dams and a drainage channel, wherein the drainage channel is located between the two composite filter dams, a water distribution pipe of the composite filter dam is communicated with the water distribution channel, a water collection pipe of the composite filter dam is communicated with the drainage channel, functional filler is filled in the composite filter dam, and functional plants are planted on the upper surface of the functional filler.
The method for treating the culture tail water by applying the sinking type zigzag sedimentation channel-composite ecological filtering dam system comprises the following steps:
the culture tail water is discharged into a sedimentation channel in a sunken zigzag sedimentation channel-composite ecological filter dam system for sedimentation, and the precipitated culture tail water (sequentially) is discharged into a plant-microorganism-filter material composite ecological filter dam system through a water distribution channel and a water distribution channel for purification and percolation treatment, then flows into a drainage channel and finally enters into the water body of the river or lake.
The channel width of the sedimentation channel in the sunken zigzag sedimentation channel-composite ecological filtering dam system for culture tail water treatment is 0.65-1.5 m, and the channel gradient is 10-20 degrees; the sedimentation channel is internally embedded into a permeable rectangular brick wall at intervals of 4-6 meters, and the length of the brick wall is consistent with the width of the channel.
Preferably, the water permeable bricks of the sunken zigzag sedimentation channel can be hung with biological films to remove part of nitrogen and phosphorus pollutants.
The height of the composite ecological filtering dam system on each side is 1.0-2.0 meters, and the optimal height is 1.5 meters; the width of the bag is 8-12 meters, preferably 10 meters;
and on the composite ecological filter dam system, planting the reeds by taking the zero-valent iron-carbon sludge-based filler as a growth substrate, inoculating arbuscular mycorrhizal fungi on the root systems of the reeds, and constructing the zero-valent iron-carbon sludge-based filter material-mycorrhizal plant-composite functional flora filter dam system. Preferably, the planting quantity of the reeds is 30-35 rows, and the inter-plant distance is 0.30-0.35 m; the zero-valent iron-carbon sludge-based filler is prepared by taking river and lake dredging sludge as a carbon intermediate material, dispersing a ferric nitrate precursor onto a carbon intermediate by an isometric impregnation method, drying, and performing high-temperature (800-900 ℃) carbothermic reduction.
The width of the drainage channel is 0.5-1.5 meters, and preferably 1 meter.
In the method for treating the culture tail water by using the sunken Z-shaped sedimentation channel-composite ecological filter dam system, the culture tail water is discharged into the sunken Z-shaped sedimentation channel for sedimentation, then discharged into the plant-microorganism-filter material composite ecological filter dam system for purification and percolation, and then flows into the drainage channel and finally enters into the water body of the river or lake.
The flow velocity of the culture tail water entering the sedimentation channel is 60-70 m/h, preferably 66.67m/h, and the sedimentation time is 0.5-3 h, preferably 1.5 h; the retention time of the tail water in the composite ecological filter dam is 3-7 days, and preferably 5 days.
The sinking type zigzag settling channel of the invention utilizes the zigzag design to prolong the hydraulic retention time, accelerates the sediment particle precipitation in tail water through the sinking gradient, and the square bricks embedded in the channel can retain the precipitated sediment and can remove partial nitrogen and phosphorus pollutants by a biological biofilm. The effluent of the sedimentation channel passes through a composite filter dam system, and organic pollutants can be removed under the adsorption and interception effects of a zero-valent iron-sludge carbon composite material; the symbiotic system formed by arbuscular mycorrhizal fungi and the reed has a good function of absorbing nitrogen and phosphorus, meanwhile, the developed ventilating tissue of the reed can provide oxygen for iron reducing bacteria in the system, iron salt is reduced to zero-valent iron, nitrate nitrogen is reduced and removed in the oxidation/reduction coupling process of iron mediated by mycorrhiza and functional flora, and the strong water absorption capacity of the mycorrhizal symbiotic system can reduce the amount of tail water. The tail water is purified and percolated by the composite filtering dam system and flows into the drainage ditch, and finally enters the water body of the river and lake.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention relates to a culture tail water treatment technology of a sunken zigzag sedimentation channel-composite ecological filter dam system, which can reduce the flow velocity of tail water and intercept silt through a sunken zigzag design under the condition of smooth water passing, simultaneously save space and reduce energy consumption, construct an arbuscular mycorrhizal fungi plant-zero-valent iron-carbon sludge-based filter material-composite functional flora filter dam system, form an adsorption-absorption-degradation-regeneration ecological circulation system, and realize the purification of the water quality and the reduction of the water quantity of river tail water.
Drawings
FIG. 1 is a schematic plan view of a submerged zigzag type settling channel-composite ecological filter dam system of the present invention;
1-a sedimentation channel, 2-a water distribution channel, 3-a water distribution channel, 4-a composite filter dam and 5-a water drainage channel;
FIG. 2 is a schematic sectional view of a settling trench in example 1;
1-1-plain concrete filling body and 1-2-permeable brick wall;
FIG. 3 is a schematic cross-sectional view of the composite medium plant-microorganism-filter material filter dam system of example 1;
4-1 water distribution pipe, 4-2 water collecting pipe and 4-3 functional filler.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.
The materials used in the examples are those conventionally available on the market, unless otherwise specified.
Example 1: the sinking zigzag-shaped sedimentation channel-composite ecological filter dam system comprises a sinking zigzag-shaped sedimentation channel and a plant-microorganism-filter material composite filter dam system;
the sunken zigzag sedimentation channel comprises a sedimentation channel 1, a water distribution channel 2 and a water distribution channel 3, wherein the sedimentation channel 1 is arranged around the circumference of the aquaculture pond, a plurality of plain concrete filling bodies 1-1 are sequentially arranged at the bottom of the sedimentation channel 1 along the water flow direction, the plain concrete filling bodies 1-1 are wedge-shaped, and water permeable brick walls 1-2 are erected between adjacent plain concrete filling bodies 1-1; the sedimentation channel 1 is communicated with a water distribution channel 3 through a water distribution channel 2, and the water distribution channel 3 is arranged at two sides of the plant-microorganism-filter material composite filter dam system;
the plant-microorganism-filter material composite filter dam system comprises two composite filter dams 4 and a drainage channel 5, wherein the drainage channel 5 is positioned between the two composite filter dams 4, a water distribution pipe 4-1 of each composite filter dam 4 is communicated with a water distribution channel 3, a water collection pipe 4-2 of each composite filter dam 4 is communicated with the drainage channel 5, the composite filter dams 4 are filled with zero-valent iron-carbon sludge-based fillers as functional fillers 4-3, reeds are planted on the upper surfaces of the functional fillers 4-3, and arbuscular mycorrhizal fungi are inoculated on root systems of the reeds.
In the method for treating the culture tail water by applying the sinking type Z-shaped sedimentation channel-composite ecological filtering dam system, the area occupied by the fishpond is taken as one mu, the average water depth of the fishpond is 2m, and the water is changed for one time by 500m3Using 100m3The pump of the/h is used for draining water, the single drainage time is 5 hours, and the flow rate of the drained water entering the settling channel is 66.67m/h (0.0185 m/s). The width of the settling channel is 1 meter, the gradient of the channel (the gradient of the plain concrete filling body) is 10 degrees, the permeable rectangular brick walls are embedded in the channel at intervals of 5.0 meters, and the settling time is about 1.5 hours. After the precipitation is finished, tail water is discharged into a composite ecological filtering dam system, the effective depth of the filtering dam is 1.5m, and the width of the filtering dam is about 10 m; and planting reeds with the row spacing of 30-35 m of 0.30-0.35 m on the composite ecological filtering dam system by taking zero-valent iron-carbon sludge as a growth substrate. And after staying in the composite ecological filter dam for 5 days, discharging into a drainage channel with the width of 1m, and finally entering into a river and lake water body.
Initial water quality COD of tail water is 65mg/L, BOD515mg/L, 3mg/L ammonia nitrogen and 0.8mg/L total phosphorus. The purified water quality COD is 30mg/L and BOD58mg/L, ammonia nitrogen 1mg/L, total phosphorus 0.4mg/L, SS clearance 90-95% (SS clearance of the whole system).
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The sinking type zigzag sedimentation channel-composite ecological filter dam system is characterized in that the sinking type zigzag sedimentation channel-composite ecological filter dam system consists of a sinking type zigzag sedimentation channel and a plant-microorganism-filter material composite filter dam system;
the sunken zigzag sedimentation channel comprises a sedimentation channel (1), a water distribution channel (2) and a water distribution channel (3), the sedimentation channel (1) is arranged around the circumference of the aquaculture pond, a plurality of plain concrete filling bodies (1-1) are sequentially arranged at the bottom of the sedimentation channel (1) along the water flow direction, the plain concrete filling bodies (1-1) are wedge-shaped, and water permeable brick walls (1-2) are erected between adjacent plain concrete filling bodies (1-1); the sedimentation channel (1) is communicated with the water distribution channel (3) through the water distribution channel (2), and the water distribution channel (3) is arranged at two sides of the plant-microorganism-filter material composite filter dam system;
the plant-microorganism-filter material composite filter dam system comprises two composite filter dams (4) and a drainage channel (5), wherein the drainage channel (5) is located between the two composite filter dams (4), a water distribution pipe (4-1) of the composite filter dam (4) is communicated with the water distribution channel (3), a water collection pipe (4-2) of the composite filter dam (4) is communicated with the drainage channel (5), a functional filler (4-3) is filled in the composite filter dam (4), and a functional plant is planted on the upper surface of the functional filler (4-3).
2. The sinking zigzag-type settling channel-composite ecological filtering dam system as claimed in claim 1, wherein the channel width of the settling channel (1) is 0.65-1.5 m, and the channel gradient is 10-20 °.
3. The sinking zigzag-shaped sediment channel-composite ecological filter dam system as claimed in claim 1, wherein a biological membrane is hung in the sediment channel (1) to remove nitrogen and phosphorus pollutants.
4. The sinking zigzag-shaped settling channel-composite ecological filtering dam system as claimed in claim 1, wherein the height of the composite filtering dam (4) is 1.0-2.0 m, and the width thereof is 8-12 m.
5. The sinking type zigzag settling channel-composite ecological filtering dam system according to claim 1, characterized in that the functional filler (4-3) is a zero-valent iron-carbon sludge-based filler, and the zero-valent iron-carbon sludge-based filler is prepared by adding an inorganic iron source precursor into river and lake dredging sludge as a carbon intermediate.
6. The sinking zigzag type settling channel-composite ecological filtering dam system as claimed in claim 1, wherein the functional plants are reed, cattail, canna or windmill grass.
7. The submerged zigzag settling channel-complex ecological filter dam system according to claim 6, characterized in that the root system of the functional plant is inoculated with arbuscular mycorrhizal fungi.
8. The sinking zigzag channel-composite ecological filter dam system according to claim 6, wherein the number of the functional plants planted is 30-35 rows, and the distance between the plants is 0.30-0.35 m.
9. The method for treating the culture tail water by using the sunken Z-shaped sedimentation channel-composite ecological filter dam system is characterized in that the culture tail water is discharged into a sedimentation channel (1) in the sunken Z-shaped sedimentation channel-composite ecological filter dam system for sedimentation, the precipitated culture tail water is discharged into a plant-microorganism-filter material composite ecological filter dam system (4) through a water distribution channel (2) and a water distribution channel (3) for purification and percolation treatment, then flows into a drainage channel (5), and finally enters a river and lake water body.
10. The method for treating the aquaculture tail water by using the sunken zigzag settling channel-composite ecological filter dam system according to claim 9, wherein the flow rate of the aquaculture tail water entering the settling channel (1) is 60-70 m/h, and the settling time is 0.5-3 h; the retention time of the tail water in the composite filter dam (4) is 3-7 days.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117164167A (en) * | 2023-10-13 | 2023-12-05 | 江苏龙腾工程设计股份有限公司 | Fishery photovoltaic complementary ecological filtration dam system for aquaculture tail water |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10266171A (en) * | 1997-03-21 | 1998-10-06 | Masayoshi Sato | Method of sand and sludge discharge system for reservoir and basin, and sand and sludge discharge system equipment for reservoir and basin |
| US20040261578A1 (en) * | 2003-04-04 | 2004-12-30 | Harman Gary E | Stable self-organizing plant-organism systems for remediating polluted soils and waters |
| CN204644073U (en) * | 2015-05-12 | 2015-09-16 | 环境保护部华南环境科学研究所 | A kind of filter dam, river course formula rainfall runoff treatment system |
| CN105297671A (en) * | 2015-09-30 | 2016-02-03 | 山东省分析测试中心 | Ecological comprehensive treatment system of northern mountain river channel and construction method thereof |
| CN207130104U (en) * | 2017-08-08 | 2018-03-23 | 浙江天沣环境科技有限公司 | A kind of pollution of area source region enters lake runoff water systems'phosphorus abatement device |
| CN110934096A (en) * | 2019-12-10 | 2020-03-31 | 山西省水产育种养殖科学实验中心 | Bicarbonate saline-alkali land pond circulating water ecological breeding system and method |
| CN210945274U (en) * | 2019-11-25 | 2020-07-07 | 中国水产科学研究院黑龙江水产研究所 | Water and soil conservation ecological restoration complex for purifying tail drainage of paddy field area |
| CN211896513U (en) * | 2019-11-22 | 2020-11-10 | 珠江水利委员会珠江水利科学研究院 | Pond culture water ecological management system |
-
2021
- 2021-05-17 CN CN202110535816.4A patent/CN113200609A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10266171A (en) * | 1997-03-21 | 1998-10-06 | Masayoshi Sato | Method of sand and sludge discharge system for reservoir and basin, and sand and sludge discharge system equipment for reservoir and basin |
| US20040261578A1 (en) * | 2003-04-04 | 2004-12-30 | Harman Gary E | Stable self-organizing plant-organism systems for remediating polluted soils and waters |
| CN204644073U (en) * | 2015-05-12 | 2015-09-16 | 环境保护部华南环境科学研究所 | A kind of filter dam, river course formula rainfall runoff treatment system |
| CN105297671A (en) * | 2015-09-30 | 2016-02-03 | 山东省分析测试中心 | Ecological comprehensive treatment system of northern mountain river channel and construction method thereof |
| CN207130104U (en) * | 2017-08-08 | 2018-03-23 | 浙江天沣环境科技有限公司 | A kind of pollution of area source region enters lake runoff water systems'phosphorus abatement device |
| CN211896513U (en) * | 2019-11-22 | 2020-11-10 | 珠江水利委员会珠江水利科学研究院 | Pond culture water ecological management system |
| CN210945274U (en) * | 2019-11-25 | 2020-07-07 | 中国水产科学研究院黑龙江水产研究所 | Water and soil conservation ecological restoration complex for purifying tail drainage of paddy field area |
| CN110934096A (en) * | 2019-12-10 | 2020-03-31 | 山西省水产育种养殖科学实验中心 | Bicarbonate saline-alkali land pond circulating water ecological breeding system and method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117164167A (en) * | 2023-10-13 | 2023-12-05 | 江苏龙腾工程设计股份有限公司 | Fishery photovoltaic complementary ecological filtration dam system for aquaculture tail water |
| CN117164167B (en) * | 2023-10-13 | 2024-03-29 | 江苏龙腾工程设计股份有限公司 | Fishery photovoltaic complementary ecological filtration dam system for aquaculture tail water |
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