低温条件下二段生物接触氧化法处理生活污水

Treatment of Sewage with Two-Stage Bio-Contact Oxidation Process at Low Temperatures

目的通过研究为北方地区在冬季低温条件下运行的污水处理厂提供技术支持，寻求经济高效的污水处理方法．方法采用二段生物接触氧化法在低温的条件下处理生活污水，确定最佳运行条件以及掌握污染物的去除情况．结果水温在8～12℃的条件下，当总的接触时间为8h左右时，COD、BODs的去除率分别可达到88．63％，91．25％左右，结论实验证明二段生物接触氧化法在低温条件下处理城市生活污水效果稳定、容积负荷高、处理时间短、抗负荷冲击能力强、运行操作简单，在污水生物处理方面前景良好，特别适用北方地区的推广应用．

The purpose is to supply reliable technological support for the wastewater treatment plant in northern areas which operate in winter at low temperatures, and to investigate the economical and efficient wastewater treatment process. The two-stage bio-contact oxidation process was used to treat sewage at low temperatures. The optimal operation condition and effect of contamination disposal were ascertained by experimentation. The result shows that when the water temperature is from 8℃ to 12 ℃, the disposal process has the advantages of steady impact, high cubage load, short disposal time, strong load-resistant pounding a- bility and simple operation. When the hydraulic reactive time is 8h, the removal rates of COD and BOD5 are 88.63 % and 91.25 %, which means that this process has a good prospect of biologic disposal, especially in northern China.