Research on Natural Organic Matter Removal by Enhanced Coagulation for Polluted Source Water Treatment under Low Temperatures

The natural organic matter removal efficiency and mechanism of enhanced coagulation for polluted source water treatment under low temperatures at different coagulation pHs were studied through bench scale tests in this paper.The results showed that,the removal rate of CODMn and UV254 were increased obviously by enhanced coagulation with pHs declined,and the removal rate of dissolved organic carbon with molecular weight ranging from 1k to 4k was increased greatly.The removed organic matters by enhanced coagulation were adsorbed and non-degradable.The enhanced coagulation was the valid means to remove organic matters and disinfection by-products precursors for polluted source water treatment under low temperatures.