The Research On Optimum Selection Of Rural Wastewater Treatment Pattern In Drinking Water Source Area

With the further development of new countryside construction,the problem of rural wastewater treatment becomes the focus of attention for people.Rural wastewater directly discharged into drinking water source area has a bad impact on the quality of drinking water.Therefore,it is extremely important to Strengthen the protection of rural wastewater treatment in drinking water source area.The selection of wastewater treatment pattern is an indispensable process in construction project.Based on this,faced the practical problems such as treatment technologies selection gist demonstration as inadequate,developing research on optimum selection of rural wastewater treatment pattern has a very important practical significance.The optimum selection of rural wastewater treatment pattern contains determining collection method and optimizing treatment technology.Therefore,according to classified guidance and in line with local conditions,this paper described wastewater collection selection process and built treatment technology optimization model,and discussed the optimization pattern in Jizhou district.Research work and conclusions are as follows:(1)this paper systematically analyzed rural wastewater treatment pattern,and set urban and rural unified collection,village centralized collection and farmers scattered collection based on the types of village.Then the flow char to choose rural wastewater was drawn.(2)Combined the optimization principle of rural wastewater treatment technology,this paper identified restrictive factors for treatment technology selection in drinking water source area,determined the process in the preliminary screening threshold conditions,and drew logic graph of rural wastewater treatment technology and regional conditions.Based on this,this paper established optimization model,which utilizes fuzzy analytic hierarchy process to evaluate treatment technology applicability,adopts the life cycle cost analysis method to evaluate economic applicability of technology,and relied on the matrix analysis method for optimizing.(3)In Jizhou district,this paper took Chutouling town as an example.Four treatment technology was preliminary screened out as alternative technology,including Subsurface Flow Wetland,Biological Contact Oxidation Process,MBR,Biological Filter and Constructed Wetland.The optimization model carried out that Biological Filter and Constructed Wetland is the best available technology to govern drinking water source's rural wastewater in Jizhou district.