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菌群和硝化菌群经过10~15 d的驯化周期后,可以保持稳定的除氮效果。 The status quo of micro-pollution of water source water in Changsha section of Xiangjiang River was investigated. The pollution index data of different sampling points in this section were obtained and the reasons for the micro-pollution in the river section were analyzed. The PAC-UF pilot plant was used to treat the micro-polluted water in Xiangjiang River. The results showed that the removal rates of turbidity, ammonia nitrogen, CODMn and UV254 were 99%, 72.10%, 46.18% and 40.39% respectively during the stable operation of the process. Meet the requirements of drinking water health standards; process system of nitrosated bacteria and nitrifying bacteria after 10 ~ 15 d of acclimatization cycle, you can maintain a stable nitrogen removal effect.