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UV and UV/H2O2 for Disinfection and Nitrosamines Treatment: An Update

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Abstract:

The occurrence of chemical and microbiological pollutants in water has been documented. At the same time, increased water scarcity is driving interest in water reuse. Water providers are increasingly utilizing reuse, including Indirect Potable Reuse, to augment regional water supplies. Ultraviolet (UV) light for disinfection and UV plus hydrogen peroxide, are key components of the treatment processes being utilized for these applications.

A number of water reuse and IPR projects around the world are in progress including Melbourne Australia's Eastern Treatment Plant and the Orange County Water District's Groundwater Replenishment System. These projects utilize advanced treatment including membranes, UV, or UV with hydrogen peroxide (UV-oxidation) to produce safe water. Water providers use UV disinfection to act as a barrier to chlorine-resistant organisms, while reducing reliance on chemical disinfectants. A sustainability analysis was conducted that illustrates that UV has a smaller environmental impact than chlorine and ozone. Further, water providers use UV-oxidation to act as a barrier to nitrosamines (particularly N-nitrosodimethylamine [NDMA]), a variety of pharmaceutical compounds and various endocrine-disrupting compounds. Full-scale demonstration testing illustrated that NDMA is successfully removed with UV-oxidation.

Keywords: IPR; NDMA; UV-oxidation; Ultraviolet; carbon footprint; disinfection; indirect potable reuse; nitrosamines; sustainability; water reuse

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864711802721794

Publication date: January 1, 2011

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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