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Chloramines have been generally used in drinking water distribution systems tocontrol the concentration of elevated prevalent disinfection byproducts (DBPs)species such as trihalomethanes (THMs) and haloacetic acid (HAAs). By maintainingthe optimal ratio of chlorine to ammonia, chloramine formation is limited tomonochloramine, a desired component which forms fewer DBPs than free chlorine.But in real operational systems, the contact time, ammonia doses, application modes,pH, temperature and bromide ions all have an effect on formed concentrations ofDBPs. Much of the research on chloramines in DBPs hasfocused on the surface water sourced water treatment systems.This study focuses on a groundwater source for the Columbia drinkingwater system that is from an alluvial aquifer bordering the Missouri River to the westand a nearby conservation area to the south. Through a series of simulateddistribution system (SDS) tests on this water, THM formation kinetics is foundunder chloramination and correlated to chlorination formation kinetics to predictTHM concentration in the Columbia drinking water distribution system when usingmonochloramine as a residual. Includes 3 references, table, figures.

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Edition: Vol. - No. Published: 11/01/2009 Number of Pages: 5File Size: 1 file , 920 KB