Composite constructed wetland used for low pollution water purification treatment of farmlands and villages

Abstract

The invention relates to a composite constructed wetland used for low pollution water purification treatment of farmlands and villages. The composite constructed wetland comprises a floating plant stabilization pond, a submerged plant oxidation pond and an emergent aquatic plant / hygrophyte ecology gravel bed which are orderly set along a water flow direction, wherein the floating plant stabilization pond is planted with floating plants, the submerged plant oxidation pond is planted submerged plants, and the emergent aquatic plant / hygrophyte ecology gravel bed is planted with emergent aquatic plants / hygrophytes. The composite constructed wetland adopts an ecological engineering processing method, and the operation cost of the composite constructed wetland is low; the total nitrogen removal rate and the total phosphorus removal rate of the low pollution water of farmlands and villages can reach more than 50% and more than 60%. In the composite constructed wetland, the floating plates, the submerged plants, and the emergent aquatic plants / hygrophytes planted in the floating plant stabilization pond, the submerged plant oxidation pond and the emergent aquatic plant / hygrophyte ecology gravel bed are aquatic economic plants which are capable of generating economic benefits and are easy to popularize in rural areas.

Description

technical field [0001] The invention relates to environmental protection, in particular to a composite artificial wetland used for purification of low-pollution water in farmland and villages. Background technique [0002] With the continuous and rapid development of social economy and increasingly serious environmental problems, the treatment rate of urban sewage in my country has been continuously improved, and the environmental protection department has become more and more strict on the discharge standards of sewage treatment plants. On the other hand, in the vast rural areas of our country, low-pollution water from non-point sources in farmland and villages has a wide distribution and is not easy to use pipelines for centralized treatment after collection, large water volume, strong volatility, poor biodegradability, and low pollutant concentration. It is impossible to use the treatment technology for urban sewage for treatment. my country's cultivated land area only a...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to solve the problem of low-pollution non-point source water treatment in farmland and villages, and provide a kind of ecological gravel bed for farmland and villages composed of floating plant stabilization pond, submerged plant oxidation pond and emergent / hygrophyte ecological gravel bed. Composite Constructed Wetland for Low Pollution Water Purification Treatment

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