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Artificial wetlands treatment of municipal sewage the ecological treatment method developed countries, nearly three decades before the rise. Because of its low investment, the water quality is good, strong impact, simple operation, construction and operation of low-cost, easy maintenance, high ammonia removal efficiency, organic combination allows the construction of sewage treatment and the environment at the same time, in the treatment of sewage while creating urban ecological landscape features, and gradually more and more countries accepted and widely used. The overall goal of this project is to determine the Shen-Fu irrigation channels downstream ecological repair technology program, in response to ecological restoration of first-site venues conditions survey, field sampling analysis, and the study of artificial wetland simulation test, examine the wetland structure shaped matrix with hydraulic The residence time of the removal of COD, NH4-N, TP, last initially identified Shen-Fu irrigation channels constructed wetland technology. Research and analysis the following conclusions: (1) hydraulic retention time HRT = 1d hydraulic loading to 30 cm / d. COD, NH4-N and TP removal rate of up to 85%, 55% and 60% of the water indicators are to meet the urban sewage treatment plant pollutant discharge standards \and urban recycling landscape and environmental quality of water \COD can meet the requirements of Surface Water Quality Standard (GB3838-2002) Grade V, NH4-N and TP can not meet the requirements of Surface Water Quality Standard (GB3838-2002) Grade V. (2) Add the nitrifying bacteria-rich activated sludge, the early start of the removal of ammonia increased significantly. In the system running for some time, as the temperature rises, the number of nitrifying bacteria and nitrification capacity within each wetland unit has been strengthened, gradually narrowing the differences between the two. (3) selection of industrial by-products Slag as a constructed wetland substrate, with a strong role in phosphorus removal. (4) vertical flow and horizontal flow wetlands for removal of pollutants there is a difference, but the difference is not. NH 4 -N and TP removal, vertical subsurface flow wetland slightly better, almost no difference on the COD removal. The simulation results show that the surface flow and vertical flow constructed wetland wastewater treatment technology can effectively remove the sewage COD, NH 4 -N and TP, constructed wetlands as the core technology repair Shen-Fu irrigation channels sewage is feasible.
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