设计说明：本次设计是对于上海市外冈镇的小型污水处理站的工艺设计，根据说明书的要求和工程概况进行本次的具体设计。预留场地为20 m×20m的正方形，要满足60户农村家庭生活污水的就地处理和达标排放。当地农村生活污水的水量较小，进水水质波动较大。进水COD浓度≤300mg/L，BOD浓度5≤150mg/L，SS浓度≤150mg/L；进水氨氮浓度≤50mg/L，总磷浓度小于3mg/L。本次设计选用分散型污水站工艺作为设计依据，选用的流程为进水→化粪池→格栅→水解酸化池→生物滤池→潜流人工湿地→出水。主体构筑物主要有化粪池，格栅，水解酸化池，生物滤池，潜流人工湿地，水位控制装置，其具体尺寸为化粪池3m×2.07m×2.5m一座，格栅0.8m×0.5m一个，水解酸化池2m×2.43m×2m一座，生物滤池1.24m×3.2m两座，潜流人工湿地9m×14m×0.9m两座，水位控制装置0.7m×0.7m×1.4m两座。本次设计主要选择生物滤池法和人工湿地处理方法，在之前加入化粪池对粪便进行首步处理，并对于每个构筑物进行相应的设计计算。然后对平面布置和高程布置进行一定的说明。使得出水达标《城镇污水处理厂污染物综合排放标准》（GB 18918-2002）中二级标准)。再对各个部分进行成本核算，依据《给水排水工程概预算与经济评价手册》，国家城市给排水工程技术研究中心以及现在市场价格进行估算，用尽量节省的资源设计最合理的处理方式，做到节能减排，保护环境的目的 最终在图纸上反映出总平面图，高程图以及各个构筑物的剖面图。57945

毕业论文关键词：分散型污水处理技术，生物滤池，人工湿地，工艺设计、成本核算

Design of decentralized sewage treatment plant process in Waigang Town, Shanghai

Design Notes: The design process design for the town of Shanghai, Okazaki small sewage treatment station, according to the requirements and instructions of the project before this specific design. Set aside space for the 20 m × 20m square, to meet the 60 rural households in situ treatment and sewage discharge standards. Local rural sewage water is small, the water quality fluctuations. Influent COD concentration ≤300mg / L, BOD concentration 5≤150mg / L, SS concentration ≤150mg / L; influent ammonia concentration ≤50mg / L, total phosphorus concentration is less than 3mg / L. The design of decentralized sewage station selection process as a design basis for the selection process for the septic tank influent .water→Septic water→grille→Biofilter→subsurface flow constructed wetland→water. The main body structure has a septic tank, grill, pool acid hydrolysis, biological filter, constructed wetland, the water level control device, the specific size of the septic tank a 3m × 2.07m × 2.5m, 0.8m × 0.5m grid a hydrolysis acidification pool a 2m × 2.43m × 2m, 1.24m × 3.2m two biological filter, constructed wetland 9m × 14m × 0.9m two, the water level control device 0.7m × 0.7m × 1.4m two. The main choice biofilter design and artificial wetland treatment, septic tank before adding the first process step of manure and for each structure corresponding design calculations. Then the layout and elevation arrangement certain instructions. So that the effluent standard "urban sewage treatment plant pollutant discharge standards" (GB 18918-2002) Grade Standard). And then the various parts of the costing, based on "Water Supply and Sewerage Project Budget and Economic Evaluation Handbook", National Urban Water Supply and Drainage Engineering Research Center and now the market price estimated by trying to save the resources to design the most reasonable approach, so energy saving, environmental protection purposes to reflect the final total plan, elevation view and a sectional view of the various structures in the drawings.