Investigation On The Causes Of Black And Smelly Water Body And The Corresponding Recovery Methods

With the rapid development of China's economy,especially the rapid development of urban construction and industry,there has been a marked increase in waste water and pollutant emissions,due to the dramatic increase of pollution load,some rivers have ecologically deteriorated,losing the self-purification function of water bodies,causing the black and smelly phenomenon of water,which has aroused widespread concern in the society.In view of this problem,this study has been studied from two aspects of the cause of the black and stinky water body and its countermeasures.Through the research of a city drainage canal water pollution governance,the pollution way of the drainage channels including:(1)urban construction caused by ecological damage,(2)randomly stacked in the water easily contaminated water body garbage;(3)without any treatment measures directly discharged domestic sewage;(4)pesticides,fertilizers and other agricultural land resulting from the use of sewage;(5)water and soil loss,resulting in exposure of the source of pollution into the water.Through investigation and analysis,the drainage canal has both internal and external pollution,and the weight of exogenous pollution is large.In view of the causes of the black and smelly water body,the overall technical ideas proposed in this project are the source of pollution control,the priority of ecological restoration,and the construction of human water landscape.The technology system of water treatment is formed by exogenous intensification treatment,rapid internal source digestion and in situ restoration of water body.Specifically,in view of the characteristics of exogenous pollution,effective measures for building centralized sewage treatment plants and decentralized rural domestic sewage are put forward.According to the endogenous pollution characteristics,put forward the ecological restoration measures,such as KOT,through the biological treatment technology of canal bottom sediment for rapid biodegradation;by occupying the river small,and not easy to be damaged by water erosion of artificial plants-enhanced coupling of membrane bioreactor technology,in-situ water for water purification;for non-point source pollution and put forward the construction of ecological riverbank measures to realize ecological restoration and non-point source pollution control,to restore the river ecosystem.This project has certain representativeness in northern China.The research results can provide reference for similar projects,which has important practical significance and certain engineering application value.