中文摘要：

针对常规工艺在给水处理中的局限性，为进一步优化出水水质，对比研究了预氯化与高锰酸钾预氧化对长江芜湖段水源水的强化混凝效果，分别考察了两种不同预氧化技术对去除浊度、CODMn、UV254、NH3-N、亚硝酸盐氮和三卤甲烷生成势（THMFP）的影响。结果表明：预氯化处理效果总体上优于高锰酸钾预氧化效果，但预氯化对于三卤甲烷生成势的控制以及助凝作用不及高锰酸钾预氧化。综合考虑除污效果及经济性，选取预氯化最佳工况为0．4mg／L次氯酸钠预氧化60min，高锰酸钾预氧化最佳工况为：高锰酸钾投量为0．4mg／L、与混凝剂同时投加，并以预氯化为优选方案。

英文摘要：

In view of the limitations of conventional process in treatment of drinking water, to fur- ther optimize the water quality, a comparative study on the effect of prechlorination and potassium permanganate preoxidation on enhanced coagulation of source water from Wuhu section of Yangtze River was carried out. The influence of the two different pretreatment techniques on removal of turbitidy, CODMn, UV254, NH3 -N, nitrite and trihalomethane formation potential （THMFP） was investigated respectively. The results showed that the treatment efficiency of prechlorination was generally superior to that of potassium permanganate preoxidation, but inferior to it in THMFP control and eoagulantion enhancement. Considering the removal effciency of above indicators and economical efficiency, 60 rain of sodium hypochlorite oxidation with NaC10 concenration of 0.4 mg/L and 0 min of potassium permanganate preoxidation with KMnO4 concenration of 0.4 mg/L were chosen as the best conditions of preehlorination and potassium permanganate preoxidation respectively, and the former scheme was considered as the optimum.