宁波地区4种典型农村生活污水处理工艺污染物去除率比较分析

选择宁波地区的A/O一体化、生物滤池、生物转盘和人工湿地等4种典型农村生活污水处理工艺为研究对象，于2013年1月-2015年12月期间开展各工艺终端处理设施的进出水水质跟踪监测，进行各处理工艺的污染物去除率和稳定性比较分析。结果表明，4种处理工艺的COD、BOD₅、SS多年平均去除率大小顺序均为A/O一体化 > 生物滤池 > 生物转盘 > 人工湿地，TN多年平均去除率大小顺序为生物滤池 > 生物转盘 > A/O一体化 > 人工湿地，其中A/O一体化、生物滤池和生物转盘工艺的COD、BOD₅、TN 平均去除率均显著高于人工湿地工艺；A/O一体化、生物滤池和生物转盘工艺随着终端处理设施运行年限的延长，COD、BOD₅、SS、TN去除率均保持稳定，而人工湿地工艺的COD、BOD₅、TN去除率均呈现明显的下降趋势；各处理工艺在低温期（11月-次年4月）和高温期（5月-10月）的SS去除率差异不明显，但各处理工艺的COD、BOD₅、TN去除率在低温期明显低于高温期，其中A/O一体化工艺差异相对较小，生物滤池工艺差异最大。

Comparison and Analysis of Pollutant Removal Efficiency of Four Kinds of Typical Rural Domestic Sewage Treatment Technology in Ningbo Area, China

Comparison and analysis of pollutant removal efficiency and stability of 4 kinds of typical rural domestic sewage treatment technology, including A/O integrated equipment technology(A/O), biological aerated filter technology(BAF), rotating biological contactor technology(RBC), constructed wetland technology(CW), were investigated in Ningbo area from Jan 2013 to Dec 2015. The results indicated that, multi-year average removal efficiency of COD, BOD₅, SS of 4 kinds of technology were in the sequence of A/O > BAF > RBC > CW, while multi-year average removal efficiency of TN was in the sequence of BAF > RBC > A/O > CW, among them the average removal efficiency of COD, BOD₅, TN of A/O, BAF and RBC were significantly higher than that of CW. Removal efficiency of COD, BOD₅, SS, TN of A/O, BAF and RBC were kept stable accompanied by extension of service period, but removal efficiency of COD, BOD₅, TN of CW were decreased significantly accompanied by extension of service period. Removal efficiency of SS was little difference between low temperature period(Nov to Apr) and high temperature period(May to Oct), but removal efficiency of COD, BOD₅, TN of low temperature period were significantly lower than that of high temperature, among them A/O was relatively insignificant, and BAF was the most.