Combined trapezoidal ecological ditch

Abstract

The invention discloses a combined trapezoidal ecological ditch, and relates to the technical field of agricultural non-point source pollution treatment. The combined trapezoidal ecological ditch comprises a ditch body, wherein a plurality of ditch units are arranged in the ditch body, a ditch bottom filler layer and a filler layer are sequentially arranged in each ditch unit from bottom to top, the ditch bottom filler layer and the filler layer are arranged close to the inner walls of the ditch units, plant interception holes are formed in the inner walls and the outer slopes of the ditch units, the plant interception holes in the inner walls of the ditch units are located above the filler layer, a drainage port is further formed in the outer slope of each ditch unit, is positioned belowthe corresponding plant interception hole and is connected with the bottom of the filler layer through a drainage pipe, a water inlet is formed in the front side of the filler layer, and a water outlet is formed in the rear side of the filler layer. According to the invention, agricultural non-point source pollutants can be effectively treated, and the treatment effect is improved.

Description

technical field [0001] The invention relates to the technical field of agricultural non-point source pollution treatment, in particular to a combined trapezoidal ecological ditch. Background technique [0002] The ecological ditch is a very simple constructed wetland. The aquatic plants in the ditch can reduce the pollutants entering the downstream through absorption, interception and transformation. At present, water treatment technology based on ecological ditches has been widely applied to eutrophic water treatment, urban and rural domestic sewage treatment, river polluted water treatment, livestock wastewater treatment, heavy metal pollution water treatment and industrial wastewater treatment. With irrigation sewage and its causing a series of agricultural environmental problems, long-term sewage irrigation can easily cause the accumulation of pollutants in farmland. Widely used, domestic and foreign researchers have carried out a lot of research on it. [0003] Organi...

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Problems solved by technology

[0003] Organic pollutants are widely present in the soil and are very difficult to degrade, especially in farmland soil where the pollution is more serious, and will migrate to different water environments through rainwater erosion, surface runoff, etc. In addition, China is a big country that uses nitrogen and phosphate fertilizers. Irrational use of nitrogen and phosphorus fertilizers not only increases costs, but also leads to non-point source pollution

Most of the existing ecological ditches are mainly planted with aquatic plants, and there are no other auxiliary treatment methods. The ability to deal with pollutants is limited. The remaining filler after treatment may cause secondary pollution, which violates the "recycling" of waste to a certain extent. Although constructed wetlands can effectively deal with N, P and organic pollutants, their treatment capacity is limited

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