Study On The Utilization Of Urban Rainwater As Resources In Xi’an

China’s water shortage, with the population growth, economic development will makesharp drop in per capita water resources, water shortages will become China’s economicdevelopment, improved living standards in the biggest constraints. Recycling water adheringto the concept of sustainable development, with the same distance as a new source of watertransfer, desalination and rainwater utilization compared to the reliability of renewable waterresources, the potential of technological progress, ecological environment, the work efficiencyand have an advantage. In the long run, urban wastewater reuse should be a new source ofwater supply as a major urban area.In this thesis, a lot of access to domestic and urban wastewater reuse and applicationdevelopment based on the analysis through the study of urban recycling mode are: reuse ofindustrial, agricultural reuse, urban mixed use, environment and water reuse entertainmentlandscape resource replenishment. Recycling of urban waste water reuse technologies andtechniques are discussed.Xi’an is a large background, Xi’an Aerospace Industrial Park for the specific study area,through the analysis of water resources in Xi’an and the water supply situation, Xi’an,discussed the need for urban wastewater reuse and feasibility of the implementation ofsewage derived in Xi’an Recycling will bring enormous social and economic benefits.Xi’an Aerospace Industrial Park wastewater reuse as the main research program, selectthe three typical wastewater reclamation processes.color in wastewater removal is moreobvious in more than80%removal efficiency of color removal more successful. MBRCODCR removal of80%to90%removal was the best. Flocculation-sedimentation-filtration on the removal rate of NH3-N was only20%to40%, the ozone BAC NH3-Nremoval rate of70%to90%.Membrane bioreactor based on the effect of sewage treatment and water qualityrequirements, determine the space program of industrial park wastewater reclamation processselect the "General AO+membrane bioreactor process," as the main body with the artificialwetland wastewater treatment recycling technology, and its test the treatment effect analysisshows that the whole system of ammonia nitrogen removal rate was98.3%, the averageremoval rate of COD is98%, the average removal of turbidity of99%. Of total phosphorus inwastewater has a good removal efficiency, effluent phosphorus index is less than0.5mg/L.The process plan to meet water quality standards for reclaimed water reuse scheme is feasible. According to the short, medium, long-term planning to determine the size of sewagetreatment and sewage treatment plant for the process design calculations, design of artificialwetlands, water quality and landscape engineering of security programs to do the appropriate.In wastewater reuse planning and management to make some useful attempts to make urbanwastewater.