Application Research On Rural Domestic Sewage Treatment By Constructed Wetland Technology

With the rapid development of the economic reform and opening up, rural lifequality gradually increased, the use of sanitary ware began to spread. The output of ruraldomestic sewage increase gradually, the water quality situation has changed dramatically.Organic load of rural domestic sewage has greatly exceeds the environmental capacity ofthe existing environment, ditch dirty, pond water quality deterioration, and even fetid hasbecome the present situation of the countryside. Sewage became one of the main causesof the rural environmental pollution, solve the problem of rural sewage became theimportant work of the rural environment regulation.This paper choosed three representative artificial wetland in Ruijin city bymonitoring the water quality in the whole year to research the CODcr, TP and NH4+-Nremoval efficiency and economic benefits, running management compared withordinary urban sewage treatment plant. Analysis and study the feasibility ofconstructed wetland using in the rural areas. Main conclusions are as follows:(1) Domestic sewage treatment effect is analyzed by three artificial wetlandwasterwater quanity monitoring from April2012to march2013. The results show thatthe effluent of the artificial wetland has obvious difference due to the differentcomposition of the influent. It had a high CODcrand TP removal effect in the threeartificial wetlands. The average removal rate is81.18%to84.68%and61.04%to75.66%, respectively. While the NH4+-N removal rate is relatively low, the averageremoval efficiency was57.77%to66.10%, and the NH4+-N removal rate is influencedby the change of seasons, removal efficiency has a significantly lower in winter.(2) Compared with ordinary sewage treatment plant, the artificial wetland have alower construction cost and operation cost in small scale Rural sewage treatment field.The artificial wetland is very suitable for the current situation of rural lack of professionaltechnical and management personnel in the aspects of operation and management. It canreach the discharge standards, to meet the requirements of rural sewage treatment.