Farmland non-point pollution stepped undercurrent dam ecological purification ditch system

A non-point source pollution and ecological purification technology, applied in the fields of environmental protection and sewage treatment, to achieve the effect of improving water purification capacity, slowing down water speed and high treatment efficiency

Active Publication Date: 2013-05-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a step-type subsurface flow permeable dam ecological ditch system integrating sewage transportation, interception and purification, aiming at the shortcomings and deficiencies in the current pollution control process of farmland non-point source pollution

Method used

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  • Farmland non-point pollution stepped undercurrent dam ecological purification ditch system
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  • Farmland non-point pollution stepped undercurrent dam ecological purification ditch system

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] Such as figure 1 It is a schematic diagram of the longitudinal structure of the farmland non-point source pollution stepped submerged flow seepage dam ecological purification ditch system. The ditch walls and ditch bottom on both sides of the ditch of the system are provided with anti-seepage blocks 5, and the slope of the ditch wall is 45°. The depth of the body is 1m, and the length of the ditch is 60m; the anti-seepage block 5 is a concrete structure with a hexagonal hole in the middle, and the two sides of the anti-seepage block 5 are respectively provided with bumps and grooves for connecting Various anti-seepage blocks, such as figure 2 As shown; soil or plant debris is arranged in the hexagonal hole, and plant 6 is planted on it, and the plant 6 is an emergent plant or a submerged plant, and the plant 6 can effectively intercept the particulate matter i...

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Abstract

The invention discloses a farmland non-point pollution stepped undercurrent dam ecological purification ditch system. The system has a trapezoidal ditch section; the ditch wall and ditch bottom on two sides of the ditch are provided with seepage-proofing building blocks; hexagonal hole structures are formed in the middle of the building blocks, and plants are planted on the hexagonal hole structures; the periphery of the building blocks are laid with pebbles and fibers; undercurrent dams are arranged in the ditch body in a distance of 10-20m at an interval; an intercepting plate is arranged at a part which is 1m away from the upstream of the undercurrent dam; small holes are formed on the lower part of the intercepting plate; the upstream face of the dam body of the undercurrent dam is provided with a fine grid filtering net; the lower part of the dam body is provided with a filling layer which takes gravel and ceramsite as fillings; the filler particles are gradually thinned along the water flow direction; the upper part of the dam body is provided with a clay layer; and plants are planted on the clay layer. The problem that large land is occupied in ecological engineering is solved, the system has the characteristics of high treatment efficiency, wide application range, good visual effect and the like, the water body is subjected to full-face purification at the normal water level, and the normal drainage and flood discharge functions during large-rainfall period are not influenced.

Description

technical field [0001] The invention belongs to the technical fields of sewage treatment and environmental protection, and in particular relates to an ecological interception and purification ditch system applied to farmland non-point source nitrogen and phosphorus pollution. Background technique [0002] my country is the largest user of chemical fertilizers and pesticides in the world. In recent years, the agricultural production model based on high chemical fertilizer input and the unreasonable fertilization structure have caused serious fertilizer loss after rainfall and irrigation, and the runoff containing a large amount of nitrogen and phosphorus nutrients is directly discharged into ditches, rivers or rivers and lakes, causing agricultural non-point source pollution. The "rural three-dimensional pollution" from water, soil, organisms to the atmosphere has been formed, which has become an important factor in my country's water environment problems. The pollution load ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14E02B3/10E02B3/14
CPCY02A10/11Y02A10/30
Inventor 涂佳敏王晓玲任炳昱周正印孙蕊蕊
Owner TIANJIN UNIV
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