Anaerobic biological treatment system for domestic sewage

Abstract

An anaerobic biological treatment system for domestic sewage comprises a sensing device, a sewage valve, a pretreatment stirring well, a regulating valve, an algae reaction tank, a precipitation filtering tank, a greening water supply pipe and a precipitation filtering tank. According to the invention, sewage is pretreated and then intensively discharged into the algae reaction tank; photosynthesis by utilizing algae on an algae culture interlayer in the algae reaction tank and symbiosis between algae and bacteria are performed to obtain a denitrified water body, the denitrified water body enters the precipitation filtering tank, and clean supernatant and residues left by precipitation and filtration of each layer are obtained under multi-layer filtration and precipitation of the precipitation filtering tank. After the domestic sewage is treated for multiple times, the obtained clean supernatant can be used for irrigating plants, and residues left by precipitation and filtration of each layer in the precipitation filtering tank can be used as fertilizers of the plants after composting treatment, so that ecological circulation is realized, and the greening maintenance cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an anaerobic biological treatment system for domestic sewage. Background technique [0002] At present, the housing density in the city is gradually increasing, and the population density is also gradually increasing, and the total amount of domestic sewage discharge in the urban sewage pipe network has become an obvious upward trend. Since domestic sewage is rich in organic matter, such as protein, carbohydrates, fat, urea, ammonia nitrogen, etc., and there are also a large number of pathogenic microorganisms, such as parasite eggs and intestinal infection viruses, etc., it is necessary to collect and collect domestic sewage in time. deal with. Once the domestic sewage is not treated in time, the organic matter in it will easily rot and produce stench when the temperature is high in summer, and it will also easily provide nutrients for bacteria and pathogens in it, lea...

AI Technical Summary

Problems solved by technology

However, due to the limitations of the city's own green space and soil, hydrological and other conditions, these small green areas in the city often need to consume a lot of manpower and material resources to maintain the nutrient and water supply of their internal plants.

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