中文摘要：

对湘江长沙段水源水的微污染现状进行了调查，得到了该段不同取样点的污染指标数据，分析了造成河段微污染状况的原因。采用PAC-UF小试装置处理了湘江微污染水源水，结果表明，该工艺稳定运行期间，浊度、氨氮、CODMn和UV254的去除率分别为99％、72．10％、46．18％和40．39％，出水满足饮用水卫生标准的要求；工艺系统中的亚硝化茵群和硝化菌群经过10～15d的驯化周期后，可以保持稳定的除氮效果。

英文摘要：

The current situation of micro-polluted source water of Xiangjiang River in Changsha section was investigated. The main water pollution index data at different sampling point was obtained and the causes of micro-pollution of Xiangjiang River in Changsha section were analyzed. PAC-UF ,as employed to treat the micro-polluted source water of Xiangjiang River. The results showed that the effluent met drinking water health standards, ad during the process of stable operation, the removal rates of turbidity, ammonia nitrogen, CODMn and UV254were 99.00%, 72.10%, 46.18% and 0.39%, respectively. After 10~15 days of domestication period, nitrosation bacteria and nitrifying bacteria in the process system can maintain the ：able nitrogen removal effect.