River sewage treatment system and sewage treatment method

Abstract

The invention relates to a sewage treating system for a river course, which comprises a plurality of sewage treating units and a plurality of barrages arranged in the river course in a water flow direction, wherein each sewage treating unit is arranged between every two adjacent barrages; and each sewage treating unit comprises a physico-chemical treatment device for conducting physico-chemical treatment on river sewage and flocculating suspended materials in the river sewage, a first settling device communicated with the physico-chemical treatment device and used for settling sludge and the flocculated suspended materials, a first biochemical treatment device communicated with the first settling device and used for degrading soluble organic contaminants in the river sewage, a second biochemical treatment device communicated with the first biochemical treatment device and used for secondary degradation of the soluble organic contaminants in the river sewage, and a second settling device communicated with the second biochemical treatment device and used for settling residual solids in the river sewage. The invention further relates to a sewage treating method.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a river sewage treatment system and a sewage treatment method. Background technique [0002] With the rapid development of China's economy and the rapid growth of urban population, the rain and sewage diversion pipe network is not perfect, the construction of urban sewage treatment plants is lagging behind and the start-up is insufficient, and the amount of sewage treatment and sewage discharge is seriously out of balance. The sewage flowing into the river will inevitably pollute the river. It causes the river water to become black and smelly, seriously affecting people's lives, even endangering human survival, and posing a serious threat to the health of urban residents and urban ecological security. According to surveys, nearly 50% of the reach of more than 700 important rivers in China, and more than 90% of the waters along the rivers have been polluted, and some urba...

AI Technical Summary

Problems solved by technology

Using this method to treat river sewage not only takes up land for the sewage treatment system and has high construction costs, but also requires a pump to pump the river sewage through the water pipe to the sewage treatment system, and the treated water is then passed through the sewage treatment system after treatment. The water pipe discharges into the river, and the treatment efficiency is low, especially when purifying the whole river basin

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