Farmland runoff pollution ecological interception ditch

Abstract

The invention discloses a farmland runoff pollution ecological interception ditch. The ecological interception ditch comprises a protection slope, an interception device is fixedly connected to the inner face of the protection slope, a planting groove is formed in the top face of the interception device, a sludge bin is fixedly connected to the bottom face of the interception device, and a sludge degradation layer is arranged on the bottom face of the sludge bin. A first filter screen and a filter plate on the interception device can filter pollutants in the ecological interception ditch, and when water in the ditch flows through an adsorption box, substances in the adsorption box can greatly adsorb harmful substances such as nitrogen and phosphorus in the water, so that the content of nitrogen and phosphorus in the water is effectively reduced; due to the fact that sediment possibly exists in the ecological interception ditch, sludge can be generated after a long time, water is polluted, when the sludge flows through along with water flow, the water flow can pass through a second filter screen, the sludge is left in the sludge bin, and a sludge degradation layer at the bottom of the sludge bin can slowly degrade the sludge, and the harmfulness is eliminated.

Description

technical field [0001] The invention relates to the technical field of ecological interception ditch, in particular to an ecological interception ditch polluted by farmland runoff. Background technique [0002] Water eutrophication is a common environmental protection problem in all countries in the world, and our country is no exception. With the rapid development of our country's social economy, water eutrophication presents a general and increasingly serious development trend. The pollution sources that cause eutrophication of water bodies can be divided into point source pollution and non-point source pollution. Among them, non-point source pollution accounts for two-thirds of the total pollution, and the contribution rate of agricultural activities to non-point source pollution is as high as 75%. Therefore, effectively controlling the pollution of farmland nitrogen and phosphorus to receiving water bodies has become an important content in the research of controlling ag...

AI Technical Summary

Problems solved by technology

The main problem of soil ditches is that it is prone to soil erosion and overgrown weeds, both of which pollute the receiving water body; the main problem of concrete ditches is that the water speed is fast, and it is difficult to settle the sediment in the drainage completely; The second is the lack of plants and microorganisms, which cannot absorb, absorb and degrade nitrogen and phosphorus in wastewater

[0003] At present, more and more attention has been paid to the construction of ecological interception ditches. Most of the existing ecological interception ditches are planted with green adsorption plants, which use plants to absorb nitrogen and phosphorus substances in the irrigation water in the ditches. The adsorption effect is limited, and the plants planted may not be able to adapt to the ecology of some areas. The rainwater in the ecological interception ditches may be excessive during the rainy season, which will cause rainwater to flow back into the farmland. The water level may drop during the dry season, which is not conducive to irrigation. Therefore the water level in the ecological interception ditch should be controlled

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