Research on the Safety Recycling Technology of Urban Sewage Plant
After the tail water of the urban sewage plant is deeply treated,the safe repurchase becomes available to use water sources.It has extremely important social,economic and environmental benefits.The advantages of artificial wetland are used in the tail water treatment of sewage plants due to its low cost,convenient operation,maintenance,ecological environmental protection,and less secondary pollution;The big advantage can fully mine or decompose the vast majority of organic matter,and has a good application prospect.This study set up an experimental base in the Futian Water Purification Plant in Shenzhen.The combination of artificial wetlands and ozone/ultraviolet oxidation was adopted,and the actual tail water of the Futian water purification plant was continuously treated.The results show that the combined process of constructed wetlands and UV/O3 can make the effluent guality stably better than the surface water standard Ⅲ,with a typical estrogen removal rate greater than 80%,which is of great significance for the safe reuse of tail water from urban sewage treatment plant.
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