城市生活污水处理工艺初步设计（O法)毕业设计.docVIP

毕业设计(论文) 题 目 80000m3/d城市生活污水处理工艺初步设计（AO法) 学 院 化 学 与 化 学 工 程 学 院 专业班级 环 境 工 程 101 学生姓名 指导教师 成 绩 年 月 日 摘 要 本设计是针对城市生活污水处理厂的工艺设计，采取的是A/O工艺，处理能力为 80000m3/d。该设计说明书主要涉及到设计的目的和意义，A/O工艺脱氮除磷的原理，主体设备的计算和选型，以及工艺流程等。同时也介绍了A/O工艺的特点，并且与其它脱氮除磷工艺进行了对比。该污水厂的污水处理流程为：从泵房到沉砂池，进入A/O反应池，进入辐流式二次沉淀池，进入接触池，最后出水；污泥的流程为：从A/O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，进入消化池，进入贮泥池，再进入脱水机房，最后外送处置。所选择的A/O工艺具有良好的脱氮除磷功能。污水处理厂处理后的水质执行《城镇污水处理厂污染物排放标准》G8918-2002中的一级B标准。 关键词：A/O工艺；脱氮除磷；污水处理厂 Abstract This design is for the technological design of urban Sewage treatment plant , that adopts is A/O craft. Handling capacity 80000 m3/d . The design specification mainly related to the purpose and significance of design, and the principle of the A/O craft denitrogenation and eliminates the phosphorus,and Main body equipments computation and shaping ,and technical process and so on. Simultaneously also introduced the characteristic of A/O craft, And were compared with other nitrogen and phosphorus removal process.The process of the sewage in the plant is that:The sewage runs from pump house to sand sinking pond,etters A/O tank,enters the pond of sedimentation tank,then enters disinfection pond,at last lets out.The process of the sludge is that: Surplus sludge from the A/O tank enters sludge setting tank, enters concentration pond, enters digestion pong,enters sludge reserving pond, then it is dehydrated,at last it is carried out of the plant. The choice of A/O process has the good function of denitrification and phosphorus removal.it prevents sludge from eapending,promots releasing phosphorus . The outlet water of the plant meets the level 1 B standard of the Discharge Standard of Pollutants for Urban Wewage Treatment plant (G8918-2002). Key words：The Anoxic-O