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Control system and technology of agricultural non-point source pollution based on hedgerows and multilayer percolation ponds

A technology of agricultural non-point source pollution and control system, which is applied in the field of non-point source pollution control, can solve problems such as deterioration, and achieve the effects of reducing the processing load, saving resources, and protecting the environment

Inactive Publication Date: 2013-05-01
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be said that without a set of practical methods to control agricultural non-point source pollution, the water quality of rivers and lakes around most water sources in my country will gradually deteriorate

Method used

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  • Control system and technology of agricultural non-point source pollution based on hedgerows and multilayer percolation ponds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] like figure 1 As shown, an agricultural non-point source pollution control system based on hedgerows 1 and multi-layer infiltration ponds 3, Amorpha fruticosa is planted along the edge of terraced fields on slopes to form hedgerows 1, and hedgerows 1 on the edge of terraced fields on each floor There are multiple rows, the row spacing is 1m, and the row spacing is 30~70cm. There are three floors; along the lower edge of the slope, grass planting ditch 2 is excavated, and grass planting ditch 2 is planted with local vegetation. , about 1 meter wide; Between the natural water body area 4 and the grass-planting ditch 2, a multi-layer infiltration pond 3 is set in parallel with the grass-planting ditch 2, and the first layer of filler in the multi-layer infiltration pond 3 is activated carbon, and the floor height is 50cm. The layer filler is biochar, with a layer height of 50cm; on the periphery of the natural water body area 4, the layer width is 1 meter; a denitrificatio...

Embodiment 2

[0035] like figure 1 As shown, an agricultural non-point source pollution control system based on hedgerows 1 and multi-layer infiltration ponds 3, Vitex japonica is planted along the edge of terraced fields on slopes to form hedgerows 1, and hedgerows 1 on the edge of each terraced field are There are multiple rows, the row spacing is 1m, and the row spacing is 30~70cm. There are three floors in total; along the lower edge of the slope, a grass-planting ditch 2 is excavated. The grass-planting ditch 2 is planted with local vegetation. About 1 meter wide; Between the natural water body area 4 and the grass-planting ditch 2, a multi-layer infiltration pond 3 is arranged parallel to the grass-planting ditch 2. The first layer of the multi-layer infiltration pond 3 is filled with kaolin, and the layer height is 70cm. The filler is biochar, with a layer height of 70cm; on the periphery of the natural water body area 4, the layer width is 1.2 meters, and the denitrification wall 6 ...

Embodiment 3

[0038] like figure 1 As shown, an agricultural non-point source pollution control system based on hedgerows 1 and multi-layer infiltration ponds 3, alfalfa is planted on slopes along the edges of terraced fields to form hedgerows 1, and hedgerows 1 on the edge of each terraced field are There are multiple rows, the row spacing is 1m, and the row spacing is 30~70cm. There are three floors in total; along the lower edge of the slope, a grass-planting ditch 2 is excavated. The grass-planting ditch 2 is planted with local vegetation. About 1 meter wide; Between the natural water body area 4 and the grass-planting ditch 2, a multi-layer infiltration pond 3 is arranged parallel to the grass-planting ditch 2, and the first layer of the multi-layer infiltration pond 3 is filled with kaolin, with a layer height of 50 cm, and the second layer The filler is biochar, with a layer height of 50cm; on the periphery of the natural water body area 4, the layer width is 80cm, and the denitrific...

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Abstract

The invention discloses a control system of agricultural non-point source pollution based on hedgerows and multilayer percolation ponds. The control system comprises hedgerows, grass ditches, multilayer percolation ponds and denitrification walls, wherein the hedgerows are planted along terrace edges on a sloping field and used for wind prevention and sand fixation and water and soil erosion prevention; the grass ditches are excavated along lower edges of the sloping field and are further used for sediment precipitation and reserved water reuse; the multilayer percolation ponds are arranged between natural water areas and the grass ditches and in parallel with the grass ditches and used for absorbing phosphorus and nitrogen in water overflowing from the grass ditches; and the denitrification walls are arranged outside the natural water areas and on convergence paths of shallow surface water and used for denitrificating nitrate nitrogen in the shallow surface water into nitrogen. According to the control system and a technology of agricultural non-point source pollution based on hedgerows and multilayer percolation ponds, technologies of the hedgerows, grass ditches, multilayer percolation ponds and denitrification walls are combined, and simultaneously, a same surface runoff of non-point source pollution is processed differently in different periods in an actual application process, so that processing loads can be reduced, and nutrient substances and water resources can be recycled.

Description

technical field [0001] The patent of the invention belongs to the non-point source pollution control technology in environmental engineering, and mainly aims at controlling the increasingly severe agricultural non-point source pollution in China, especially the nitrogen and phosphorus pollution in agricultural non-point source pollution. Agricultural non-point source pollution control system and technology in filter ponds. Background technique [0002] With the development of my country's economy, environmental protection problems are becoming more and more serious. In the past, people mostly dealt with point source pollution. However, with the deepening of people's understanding of environmental problems, the problem of non-point source pollution has gradually attracted people's attention. In non-point source pollution, agricultural non-point source pollution is a very important source of pollution. Excessive use of chemical fertilizers and pesticides, and untreated or simp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/32
Inventor 左剑恶刘峰林杨波邢薇邢丽楠王佩
Owner TSINGHUA UNIV
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