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REMOVAL OF TRIHALOMETHANE PRECURSORS BY DIRECT FILTRATION AND CONVENTIONAL TREATMENT
Citation:
Edzwald, J. REMOVAL OF TRIHALOMETHANE PRECURSORS BY DIRECT FILTRATION AND CONVENTIONAL TREATMENT. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-84/068.
Description:
This research examined direct filtration for the removal of trihalomethane (THM) precursors. Direct filtration pilot plant results were compared with the performance of two full scale conventional type water treatment plants. Two different water sources were studied - the Grasse River, a highly colored supply and the Glenmore Reservoir, a low turbidity, protected upland supply. Direct filtration with cationic polymers as sole coagulants is an effective treatment process. Both conventional plants employed alum as the primary coagulant. This study showed that UV (254 nm) absorbance is a good surrogate parameter for predicting raw water NPTOC and THM precursors, for monitoring direct filtration performance for removals of these parameters, and for monitoring removals of these parameters by the two conventional water plants.