本科毕业论文-某县污水处理厂处理工艺设计——奥贝尔氧化沟工艺.doc

PAGE 摘 要 本次毕业设计的题目为某县污水处理厂工艺设计——奥贝尔氧化沟工艺。设计主要任务是根据该县污水性质、排污规模的要求完成污水处理厂初步设计和单项处理构筑 物设计。 其中污水处理厂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；单项处理构筑物设计中，主要是完成主体处理构筑物平面图及剖面图及部分大图样。 该污水处理厂工程，一期规模为2万吨/日，二期规模4万吨/日。 该污水处理厂的污水处理流程为：污水由市政排水管网经格栅由泵房提升进入到旋流沉砂池，进入厌氧选择池，进入奥贝尔氧化沟，进入辐流式二沉池，进入接触池，最后出水；污泥的流程为：从二次沉淀池池排出的剩余污泥进入回流污泥泵房，再由污水泵送入浓缩脱水一体机，再进入储泥池，由浓缩污泥泵房提升送入污泥脱水间，最后泥饼外运处置。 污水处理厂处理后的出水优于国家污水综合排放标准（GB)中的一级B标准。 所选择的奥贝尔氧化沟，具有良好的脱氮除磷功能。 关键词：污水处理，奥贝尔氧化沟，排放标准，脱氮除磷 ， Abstract：The topic of this graduate design is about the design of the sewage treatment plant in the development area of economy and techonology in this City. The technics of the plant is the in Orbal oxidation ditch process. 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 treatment 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 Orbal oxidation ditch process. The construction of this plant is 20000 ton per day now and 40000 ton per day in the future. The process of the sewage in the plant is that: The sewage runs from pump house to sand sinking pond, enters anaerobic?select?pool, enters Orbal oxidation ditch , 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 Concentrate?dewatering machine, 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-B of the National Sewage Discharge Standard (GB8978-1996). There is an Orbal oxidation ditch process prevents sludge from eapending, promots releasing phosphorus ,and strengthens anti-nitration. Key words： HYPERLINK /sewage Sewage?treatment，The Orbal oxidation ditch process, HYPERLINK /discharge discharge? HYPERLINK /standard standard?，Ta