池州市城东污水厂A^2/O氧化沟工艺的运行分析

Operation Analysis of A^2/O Oxidation Ditch Process in Chengdong Wastewater Treatment Plant of Chizhou City

池州市城东污水处理厂采用A2/O氧化沟工艺,一期设计规模为2×104m3/d,而实际处理量为0.9×104m3/d。2012年污水厂的整体运行效果较稳定,在进水COD平均浓度仅为122 mg/L的情况下,对COD、NH+4-N和TP的平均去除率分别可达到75%、73%和57%,出水水质满足设计要求的《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级B标准,并且出水COD和氨氮浓度可达到一级A标准。目前该污水厂存在的主要问题是进水量不足、进水有机物浓度偏低,建议加强服务区域的污水管网配套建设以增加进水量,同时适当引入有机工业废水以提高进水有机物浓度。

Chengdong WWTP in Chizhou City adopted A^2/O oxidation ditch process. The design capacity of the first-phase project was 2×10^4m^3/d, but the actual treatment capacity was 0.9×10^4m^3/d. The overall operation of the plant was stable in 2012. When COD concentration in the influent was 122 mg/L, the average removal rates of COD, NH4＋ -N and TP were 75% , 73% and 57% , respectively. The effluent COD and NH4＋ - N met the first level A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （GB 18918 -2002）, and other indexes of the effluent met the first level B criteria. The current problems are insufficient influent flow and low influent organic concentration. Suggestions were made for strengthening construction of the pipe network to increase the influent and introducing organic industrial wastewater adequately to increase the influent organic concentration.