武汉A2O处理城市污水5万吨毕业设计.doc

摘 要 本次毕业设计的题目为武汉某经济开发区污水处理厂设计—工艺。主要任务是完成该经济开发区排水管网布置及污水处理厂初步设计和单项处理构筑物施工图设计。 其中初步设计要完成设计说明书一份、污水处理厂总平面图一张及污水处理厂污水与污泥高程图一张；单项处理构筑物施工图设计中，主要是完成平面图和剖面图及部分大样图。 该污水处理厂工程，近期规模为5万吨/日。 该污水厂的污水处理流程为：从泵房到沉砂池，进入反应池，进入辐流式二次沉淀池，进入接触池，再进入巴氏计量槽，最后出水；污泥的流程为：从反应池排出的剩余污泥进入集泥配水井，再由污水泵送入浓缩池，再进入储泥池，最后外运处置。 污水处理厂处理后的出水优于国家污水综合排放标准(GB8978-1996)中的一级标准。 所选择的工艺，具有良好的脱氮除磷功能。 关键词：工艺；脱氮除磷； ABSTRACT The topic of this graduate design is about the design of the sewage disposal plant in the development area of economy and techonology in wuhan City. The technics of the plant is the Anaerobic-Anoxic-Oxic. The main task is the primary design of the plant and the shop drawing of the oxidation ditch pond. The task of the primary design is that a design book、a plan of the plant、the high drawing of the disposal of sludge and sewage;in the single disposal build design,the harvest is that the section plane drawing、the plan and some part magnifying drawings of the . The construction of this plant is 50000 steres per day. The process of the sewage in the plant is that:The sewage runs from pump house to sand sinking pond,enters the pond of sedimentation tank,enters disinfection pond,then enters calculation trough,at last lets out.The process of the sludge is that: Surplus sludge from the sedimentation tank enters concentration pond,enters digestion pong,then it is dehydrated,at last it is carried out of the plant. The outlet water of the plant meets the level one of the National Sewage Discharge Standard (GB8978-1996). There is an Anaerobic-Anoxic-Oxic more than the craft of SBR in the craft of CASS. it prevents sludge from eapending,promots releasing phosphorus ,and strengthens anti-nitration. Key words：The; Taking off the nitrogen and the phosphorus;  目 录 摘 要 1 ABSTRACT 2 第一部分 1 第1章 设计概论 1 1.1设计任务 1 1.2 开发区概况及自然条件 1 1.2.1 开发区概况 1 1.2.2 开发区自然条件 3 1.2.3 设计水量与水质 4 第2章 总体设计 5 2.1排水体制 5 2.1.1 合流制排水系统 5 2.1.3 分流制排水系统 6 2.1.5 排水体制选择 7 2.2 污水处理厂设计规模 8 第3章 污水处理厂设计 8 3.1 污水处理厂址选择 8 3.2 污水