A high-efficiency phosphorus removal ecological ditch and its paving method for farmland non-point source pollution

Abstract

The invention discloses a high-efficiency phosphorus-removing ecological ditch for non-point source pollution of farmland and a paving method thereof, which belongs to the field of non-point source pollution control of farmland. A high-efficiency phosphorus removal ecological ditch for farmland non-point source pollution, comprising a ditch body on which two slopes and a bottom made of ecological permeable materials are laid; wherein, the water permeability coefficient of the ecological permeable material laid on the bottom of the ditch greater than the water permeability coefficient of the ecological permeable material laid on the side slope of the ditch. By laying ecological permeable materials that can slowly release calcium and iron ions and have different water permeability coefficients on the slope and bottom of the ditch, the chemical precipitation of phosphate and calcium and iron ions in the water body can achieve the effect of phosphorus removal. In the long run, the ecological ditch can improve the phenomenon of excessive phosphorus in surface water and reduce the degree of eutrophication of water body.

Description

A kind of high-efficiency phosphorus removal ecological ditch and paving method for farmland non-point source pollution technical field The invention belongs to the field of farmland non-point source pollution control, particularly a kind of farmland ecological ditches and paving method thereof. Background technique Farmland non-point source pollution refers to in agricultural production activities, nutrients such as nitrogen, phosphorus and organic or Inorganic pollutants form water environment pollution through farmland surface runoff and farmland leakage. At present, non-point source pollution of farmland has been It has become the main reason for the eutrophication of nitrogen and phosphorus in water bodies in my country. Ecological ditches serve as the main source of farmland drainage into rivers, rivers, lakes and reservoirs. The most important way, its ability to purify farmland non-point source pollutants will directly determine the load of farmland non-point...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problem of secondary pollution that may exist in the ecological ditch that removes phosphorus through aquatic plants in the prior art, the present invention provides an efficient phosphorus removal ecological ditch and its paving method for farmland non-point source pollution. The body of the ecological ditch is constructed by laying permeable bricks made of a nitrogen-removing and phosphorus-removing ecological permeable material on the slope. The ecological ditch constructed by using the nitrogen-removing and phosphorus-removing ecological permeable material can purify the water quality, and there is no need to plant special plants for absorbing nitrogen and phosphorus in the water body. aquatic plants

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