本科毕业设计说明书题 目：聊城市冠县污水管网和污水处理厂的设计院 （部）：市政与环境工程学院专 业： 给水排水工程班 级： 水工姓 名： 学 号： 指导教师： 完成日期： 2012.6摘 要本次设计为聊城市冠县污水管网和污水处理厂的设计。设计人口密度为 360cap/ha，污水量标准为 140L/（cap·d），污水管网遍布整个城区，污水管网全长 46.69 公里，污水管网服务面积 977.27 公顷。 根据城区地形等因素，确定确定污水主干管和干管。经过水力计算，最大埋设深度为 7.88m，最大管径为 DN1300，管材采用钢筋混凝土。污水处理厂位于聊城市冠县东南部。污水处理量 75000m3/d，占地 75364 m2 。根据进、出水水质及脱氮除磷的要求，采用 A-A-0 曝气池工艺，其处理流程为：进水→粗格栅→泵站→细格栅→沉砂池→初沉池→A-A-0 曝气池→二沉池→混合→过滤→消毒→出水。出水水质基本 《城镇污水处理厂污染物排放标准》（GB18918-2002）中的一级 A标准。管网总投 0.59 亿元，污水处理厂总投资为 1.2 亿元，处理水成本为 0.747 元。关键词：污水管网；污水处理；A-A-O；脱氮除磷ABSTRACTThis is a design of wastewater treatment plant & wastewater pipe network for liao cheng city. The population density of this design is 360cap/ha and the wastewater discharge quota is 140L/(cap·d). The drainage pipe network basically covers all over the town. The whole length of the wastewater pipe network is about46.69 km and the service area of the network is about977.27 hectares. According to the landform of the liao cheng city, the pipe network schemes are completed. Hydraulic calculation showed that the maximal burial depth of the pipe network is 7.88m and the maximal diameter of pipes is DN1300. The reinforced concrete pipes are adopted in this design. The wastewater treatment plant lies in the southeast of liao cheng guan xian. The disposed scale of wastewater treatment plant is 75000 m3/d and its area is about 75364 m2.According to the demand of nitrogen and phosphorus removal, also the...
