Influence of eutrophication on the coagulation efficiency in reservoir water.

摘要: Water from the three reservoirs, Min-ter, Li-yu-ten and Yun-ho-shen, was examined for concentration of chlorophyll a, ultraviolet absorption (UV254), fluorescence intensity (FI), dissolved organic carbon (DOC), fractionation molecules by molecular weight. The water samples were collected over change spring to summer (May July but before typhoon season) when temperature extent eutrophication increase. Analytical results indicate that DOC is proportional not values UV254 FI. Therefore, eutrophication, extraneous contaminants small molecules, extracellular products algae cause an increase in DOC, a decrease proportion large such as humic substances. fraction with weight less than 5000 Da increases a. All these data suggest changes quality after make treatment drinking more difficult. method enhanced coagulation recently developed removing DOC. However, this paper demonstrate efficiency removal falls degree increases. When percentage excreted increased 1%, decreased approximately implying are able remove during resulting trihalomethanes formation disinfections process.