摘要:本设计是河南省C市A区污水处理厂的初步设计。设计处理废水为典型的城市污水，规模为34265m3/d。处理水质为：BOD5=200mg/L，CODcr=410mg/L，SS=200mg/L，TN=35mg/L，TP =5mg/L；设计出水水质BOD5 ≤ 10mg/L，CODcr≤ 50mg/L，SS ≤ 10 mg/L，TN ≤ 15mg/L，TP ≤ 0.5 mg/L，即要求污水处理后达到《污水综合排放标准（GB 18918－2002）》的一级标准。

　根据设计要求和求新的思想，该污水处理工程进水中氮和磷含量均偏高，在去除BOD5和SS的同时，还需要进行脱氮除磷处理，故采用UCT工艺。该工艺具有高效，节能的特点，且耐冲击负荷高，出水水质好。因此，具有广泛的适应性，完全适合本设计的实际要求。本工艺的主要构筑物包括格栅、污水泵房、沉砂池、生化池、二沉池等。

　设计中对各处理构筑物进行了详细的计算和工艺参数确定，并绘制了污水处理厂总平面图、工艺流程图、高程图及单项构筑物施工工艺图。

关键词 城市污水；UCT；脱氮除磷

Abstract:This project is a primary design of sewage plant of drainage system design C city A District OF Henan province. The treated wastewater is typical municipal sewage.The design scale is 34265 m3/d. The primary water quality is presented as following: BOD5 = 200 mg/L,CODcr = 410 mg/L,SS = 200 mg/L,TN=35 mg/L,TP =5 mg/L;and the effluent need reach the GB 8978-1996,which is BOD5 ≤ 10mg/L,CODcr ≤ 50mg/L,SS ≤ 10 mg/L, TN ≤ 15mg/L,TP ≤ 0.5 mg/L.

　According to the designing requirement and thought of looking for novelty,the content of nitrogen and phosphi is on the high side in this project,so it should be dealed with,while get rid of BOD5 and SS.We adopt and useUCT(Univerdity Of Cape Town),which is a popular wastewater treatment process in recent years.The advantage of this comprehensive craft is extensive adaptability,totally suitable for reality originally designed's purpose.Its main structures include grid,sewage pumping house,sand pool,UCT and Concentration pool etc.

　In the design,it has carried on the detailed computation to each main processing construction,and plans the sewage treatment plant general layout,the sewage elevation chart.

Key words  municipal sewage  UCT  removal the nitrogen and phosphir