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REDUCTION IN DBP PRECURSORS AND PATHOGENS DURING RIVERBANK FILTRATION AT THREE MIDWESTERN DRINKING WATER UTILITIES
Citation:
Weiss, W. J., E. Bouwer, W. P. Ball, C. O'Melia, H. Arora, AND T F. Speth*. REDUCTION IN DBP PRECURSORS AND PATHOGENS DURING RIVERBANK FILTRATION AT THREE MIDWESTERN DRINKING WATER UTILITIES. Chapter 8, Ray, C., Melin, G., Linsky, R.B. (ed.), Water Science and Technology Library, Vol 43. Riverbank Filtration - Improving Source-Water Quality ISBN 1-4020-1133-4. Kluwer Academic Publishers, Hingham, MA, 43:147-174, (2003).
Description:
Riverbank filtrtion (RBF) is a process that subjects river water to ground passage prior to its use as a drinking water supply. European expereince with RBF demonstrate that during infiltration and underground transport, processes such as filtration, sorption, and biodegradation produce significant improvements in raw water quality. Research was undertaken to evaluate the merits of riverbank filtration for removing/controlling DBP precursors, pathogens,and pesticides; and evaluate if riverbank filtration can improve finished drinking water quality by altering natural organic matter (NOM) in a manner that is not otherwise acomplished through conentional drinking water treatment.
The project consisted of three studies that monitor the performance of three riverbank filtration systems along the Ohio, Wabash, and Missouri Rivers. The first study involved monitoring a range of water quality parameters. The second study involved simulated treatment of river waters including coagulation, flocculation, sedimentation, filtration, and ozonation. The third study underway is employing XAD-8 fractionation to elucidate the changes in the character of the organic matter upon bank filtration, and the effects of these changes on the formation of DBPs.