A combined wetland system suitable for treating domestic sewage of scattered farmers

Abstract

The inventiondiscloses a multiple wetland system applicable to treating decentralized rural domestic sewage. The multiple wetland system comprises a surface flow wetland unit, a primary subsurface wetland unit, a secondary subsurface wetland and a tertiary subsurface wetland unit which are sequentially connected through a pipeline with a valve, wherein the surface flow wetland unit is provided with a water inlet; the tertiary subsurface wetland unit is provided with a water outlet; water wells and aerating systems are respectively arranged in the primary subsurface wetland unit, the secondary subsurface wetland and the tertiary subsurface wetland unit; the surface flow wetland unit, the primary subsurface wetland unit, the secondary subsurface wetland and the tertiary subsurface wetland unit are respectively provided with sewage outlets; different landscape aquatic wetland plants are distributed in the surface flow wetland unit along with the seasonal change; composite fillers are respectively paved in the primary subsurface wetland unit, the secondary subsurface wetland and the tertiary subsurface wetland unit; different landscape aquatic wetland woody plants and herbaceous plants are distributed on the composite fillers along with the seasonal change. The multiple wetland system applicable to treating the decentralized rural domestic sewage is stable and efficient in treatment effect, low in construction and operation cost, small in floor space, and good in landscape effect, can bring a certain economic benefit, and is suitable for treating the decentralized rural domestic sewage in rural areas.

Description

technical field [0001] The invention relates to a combined wetland system suitable for treating domestic sewage of scattered peasant households. Background technique [0002] In recent years, my country's rural water environment problems have become increasingly prominent, and compared with urban water pollution control, there are greater difficulties both technically and economically. Therefore, from the perspective of applicable technology, rural domestic sewage treatment should be based on local The decentralized and miniaturized governance model is actually adopted, and technically requires simple process, guaranteed purification effect, low investment, low energy consumption, and simple operation and maintenance. It is generally believed that adopting natural ecological treatment technologies according to local conditions is an effective means of rural domestic sewage treatment, and the most typical technologies include oxidation ponds, infiltration and artificial wetlan...

AI Technical Summary

Problems solved by technology

Despite this, constructed wetland technology is still in its infancy in rural sewage treatment, and some of the reported ones are not representative as a whole, and there are more or less problems and deficiencies, such as: high construction costs, and difficulty in meeting effluent quality standards , The treatment effect is not good in winter, the system is easy to block, and the floor area is large, etc.

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