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Ecological recovery method of agricultural Non-Point source pollution rivers

A technology for agricultural non-point source pollution and ecological restoration, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as polluted rivers, and achieve enhanced purification capabilities and improved river water quality Effects of improvement and surrounding landscape improvement

Active Publication Date: 2013-01-09
安徽水韵环保股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to effectively solve the problem of agricultural non-point source pollution of some villages and towns (or streams) in southern my country, and propose a method that directly uses the river section to be treated as the carrier for treatment, and reasonably matches with high-efficiency water purification. Combination technology of membrane, bio-grid filtration, floating island wetland, and benthic animal control to continuously improve water quality and at the same time realize a virtuous cycle of water ecosystem

Method used

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  • Ecological recovery method of agricultural Non-Point source pollution rivers

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Effect test

Embodiment 1

[0024] The average width of the river course is B=12m, the average water depth is 2.5m, and the water area is 3744m 2 , along the direction of water flow, the river section is divided into water purification membrane filtration section I (length L 1 =130m), biological barrier filter section II (length L 2 =26m) and wetland layout section III (length L 3 =156m); in the water purification membrane filtration section I, a 312m high-efficiency water purification membrane is arranged at the farmland sewage outlet as the layout point 2 ; In the bio-barrier filtration section II, a 62.4m bio-barrier is also arranged at the farmland sewage outlet as the layout point 2 ; In the wetland layout section III, a floating island wetland is arranged every 10m along the water flow direction, with a wetland area of ​​468m 2 Afterwards, 37.44kg of snails and clams were put in, and 1123 giant oysters were put in to control and raise benthic animals in the entire agricultural non-point source p...

Embodiment 2

[0026] The average width of the river course is B=16m, the average water depth is 2.0m, and the water area is 6451.2m 2 , along the direction of water flow, the river section is divided into water purification membrane filtration section I (length L 1 =168m), biological barrier filter section II (length L 2 =33.6m) and wetland layout section III (length L 3 =201.6m); in the water purification membrane filtration section I, a 537.6m high-efficiency water purification membrane is arranged at the farmland sewage outlet as the layout point 2 ; In the bio-barrier filtration section II, the bio-barrier 107.52m is also arranged at the farmland sewage outlet as the layout point 2 ; In the wetland layout section III, a floating island wetland is arranged every 10m along the water flow direction, with a wetland area of ​​806.4m 2 Afterwards, put in 64.512kg of snails and clams, and put in 1935 giant oysters to control and raise the benthic animals in the entire agricultural non-point...

Embodiment 3

[0028] The average width of the river course is B=23m, the average water depth is 2.3m, and the water area is 6513.6m 2 , along the direction of water flow, the river section is divided into water purification membrane filtration section I (length L 1 =118m), biological barrier filter section II (length L 2 =23.6m) and wetland layout section III (length L 3 =141.6m); in the water purification membrane filtration section I, a 542.8m high-efficiency water purification membrane is arranged at the farmland sewage outlet as the layout point 2 ; In the bio-barrier filtration section II, the bio-barrier 108.56m is also arranged at the farmland sewage outlet as the layout point 2; In the wetland layout section III, a floating island wetland is arranged every 10m along the water flow direction, with a wetland area of ​​814.2m 2 After that, 65.136kg of snails and clams were put in, and 1954 giant oysters were put in to control and raise benthic animals in the entire agricultural non-...

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Abstract

The invention belongs to the field of ecological and environmental protection, specifically relating to an ecological recovery method of agricultural Non-Point source pollution rivers. The method comprises the following steps: an agricultural Non-Point source pollution river section is divided into three continuous different sections including a water film filter section, a biological grid filter section and a wetland arrangement section as a sewage treatment unit; sewage flows into the water film filter section at the first, flows to the biological grid filter section by itself and then flows into the wetland arrangement section; after that, spiral shells and clams are put according to the density of 1 kg per square meter; 0.3 giant oysters are put into each square meter so as to control and breed benthonic animals in entire agricultural Non-Point source pollution river section. The method takes the river section to be treated as a treated carrier, reasonably coordinates with the combination technology of high-efficiency water filter films, biological grid filtering, floating island type wetlands and control and breed of the benthonic animals, continuously improves the water quality and achieves the virtuous circle of water ecosystems.

Description

technical field [0001] The invention belongs to the field of ecology and environmental protection, and in particular relates to an ecological recovery method for agricultural non-point source polluted river courses. Background technique [0002] Due to the extensive use of chemical fertilizers in modern agriculture, some riverbanks in rural areas in southern my country (called rivers in Guangdong and Guangxi) have caused farmland runoff to carry a large amount of nitrogen and phosphorus into the water body, and the COD discharged into the river water body cr , ammonia nitrogen, total phosphorus and other pollutants have changed the nitrogen and phosphorus balance of the river. Since nitrogen and phosphorus are the nutrient elements for plant growth, a large increase in the nitrogen and phosphorus content in the water body will inevitably cause the excessive growth and reproduction of aquatic organisms, cyanobacteria, chlorella and other algae, resulting in a decrease in the ...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 张文艺占明飞李仁霞戴如娟郑泽鑫
Owner 安徽水韵环保股份有限公司
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