1、 1 西安市某污水处理厂设计 内容内容摘要摘要 本设计为西安市某污水处理厂工程工艺设计，污水处理厂规模为 81040m 3/d，污水主要来源为生活污水和工业废水，主要污染物质是 BOD、COD 、 SS 、TN、NH3-N、TP，适宜采用生化处理方法。结合污水来源的水质特征，确定 采用倒置 A 2/O 为主体反应池的污水处理工艺流程和以重力浓缩池为主体的污泥 处理工艺流程。本工艺具有良好的去除 BOD、COD 及脱氮除磷的功能，对 BOD、 COD、SS、TN、NH3-N、TP 的去除率分别能达到 96.23%、89.51%、96.68%、68.72%、 83.33%、86.23%，污水处理厂
2、处理后的出水达到城镇污水处理厂污染物排放标 准 （GB18918-2002）中的一级 A 标准，其出水就近排入水体。 关键词关键词 倒置 A 2/O 工艺；脱氮除磷；曝气沉砂池；辐流式沉淀池；重力浓缩池 The design of The Sewage Treatment Plant in Xian City Abstract The topic of this graduate design is about the design of The Sewage Treatment Plant in Xian City. The capacity of this Sewage Treatment
3、 Plant is 81040m3/d.Its main source of sewage come from domestic sewage and industrial wastewater, and the major pollutants are BOD、COD 、SS 、TN、NH3-N、TP. Biological treatment method is suitable for the Sewage Treatment Plant in Xian City . After analyzing water quality of sewage, I determined to app
4、ly of reversed A2/O as the main reaction tank of the sewage treatment process and to use of the gravity thickener as the main sludge treatment process. These treatment process are good at removing BOD、COD、N、P, and the removal rate can reach to 96.23%、89.51%、 96.68%、68.72%、83.33%、86.23%.After the treatment process of the Sewage Treatment Plant, the quality of the swage can reach to A standard of the urban sewage treatment plant pollutant discharge standard(GB18918-2002), and pour into th
