Abstract
UV light has become increasingly well-established as an effective primary disinfectant for Giardia and Cryptosporidium. Many utilities are now focusing attention on control of emerging contaminants, and looking at the effectiveness of UV advanced oxidation as part of a multiple-barrier treatment train for improving water quality. In research and a small number of full-scale applications, a UV advanced oxidation process (AOP) has been shown to be effective as part of a multiple-barrier water purification train. For the City of Aurora, Colorado, the Aurora Reservoir Water Purification Facility will include UV AOP as part of a multiple barrier approach to provide disinfection, nitrosamine destruction, and micro-pollutant removal. Bench-scale testing was performed to evaluate the effectiveness of UV AOP for the control of nitrosamines and other micro-pollutants. Compounds tested included N-nitrosodimethylamine (NDMA) and 8 other nitrosamines. The test results showed predictable and repeatable destruction of NDMA, and destruction of other tested nitrosamines exceeded NDMA destruction at the same collimated beam UV doses.
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