Distributed sewage biological treatment process in rural area

Abstract

The invention relates to a distributed sewage biological treatment process in a rural area. The distributed sewage biological treatment process consists of a pretreatment zone, a biological purifying zone and a culture zone, wherein the pretreatment zone comprises a hydrolysis acidification pool and a cloth media filter; the biological purifying zone comprises an artificial wetland and a fungus-algae pond; and the culture zone is a fish pond. The hydrolysis acidification pool is used for degrading particulate and soluble organic matters in the sewage; the cloth media filter is used for removing suspended particulate matters; pretreated sewage enters the artificial wetland and the fungus-algae pond for further removing various organic matters and contaminating materials such as nitrogen and phosphor and simultaneously generating a large amount of aquatic plants and algae; the harvested aquatic plants can be used as feed which is provided for fishes; and the algae and the treated sewage directly enter the fish pond. According to the distributed sewage biological treatment process disclosed by the invention, the recycling of the contaminating materials is realized, the problem that the pollution of the distributed sewage in the rural area is effectively solved; and the distributed sewage biological treatment process has the advantages of strong flexibility, high removal rate of the contaminating materials, low operation and maintenance cost and the like.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a rural decentralized sewage ecological treatment process. Background technique [0002] The level of urbanization in China is constantly improving, and the current urbanization rate has exceeded 50%, but nearly 50% of the population still lives in rural areas. Compared with cities, rural sewage treatment facilities are very scarce. A large amount of rural domestic sewage cannot be effectively treated due to the lack of corresponding sewage treatment facilities, and the wanton discharge of rural domestic sewage has caused very serious harm to the environment. Rural domestic sewage has the following characteristics: First, compared with cities, the rural population is small and widely distributed; second, rural domestic sewage changes greatly, and the concentration of organic matter in sewage is low; third, toxic and harmful substances and nitrogen and phosph...

AI Technical Summary

Problems solved by technology

However, the treatment load of this technology is low, and the operation effect is easily affected by temperature fluctuations. The most important thing is that the effluent quality of this technology is difficult to meet the standard, and nitrogen and phosphorus are hardly removed, so it cannot fundamentally solve the pollution problem of rural decentralized sewage

Constructed wetlands are engineered wetlands that are artificially built and managed. It uses physical, chemical, and biological processes to remove various pollutants in sewage to purify water bodies. However, it has a large area and weak ability to resist climate change. , easy to block, unstable denitrification and dephosphorization effects, etc.

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