Moveable assembled water quality purifier for field drainage ditch

Abstract

The invention relates to a moveable assembled water quality purifier for a field drainage ditch. The purifier is characterized in that one or two dividing channels are excavated next to the original channel according to surface source pollution degree of the field and flow rate of water flow in the field drainage ditch, wherein the dividing channels are equal to the original channel, so that the flow rate of the water flow is remarkably reduced and the hydraulic retention time can be greatly increased. A monomer water quality purifying box is prepared by reinforcing steel bars and steel wire nets. Different monomer water purifiers in different sizes can be selected according to section sizes of the field drainage ditches to combine and arrange to fill the whole channel, so that field flows as many as possible are treated by the water purifiers. The purifier has the advantages that the eutrophication degree and risk of a receiving water of the surface source pollution of the field can be reduced, and pesticide residue and organic matters hardly biodegradable in the field drain water can be absorbed to a certain extent. Meanwhile, the purifier provided by the invention is few in construction work, convenient to maintain and manage, good in treatment effect, simple to prepare and low in cost.

Description

technical field [0001] The invention relates to a water purifier capable of reducing the content of nitrogen, phosphorus, organic matter and difficult-to-biodegrade pesticide residues in farmland drainage ditches. The invention belongs to the technical field of farmland non-point source pollution control. Background technique [0002] Farmland non-point source pollution has become the main cause of eutrophication in many water bodies in my country, and its contribution rate exceeds point source pollution from urban domestic sewage and industry. Water pollution caused by farmland non-point source will be the biggest challenge for China's sustainable development one. Farmland non-point source pollutants produced by farmland drainage are relatively complex and vary with the types of fertilizers and pesticides applied, but generally they are mainly nitrogen, phosphorus, organic matter and pesticide residues. Effective control of nitrogen and phosphorus concentrations in farmlan...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a movable assembled farmland drainage ditch water quality purifier, the purpose of which is to overcome the problem of farmland non-point source pollution. By directly placing the water quality purifier in the farmland drainage ditch, the concentration of nitrogen and phosphorus in farmland non-point source pollution can be effectively controlled, thereby Reducing the degree of eutrophication of receiving water body polluted by farmland non-point source

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