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AWWA WQTC71643
- The Value of Post-RO Advanced Oxidation for Indirect Potable Reuse
- Conference Proceeding by American Water Works Association, 11/01/2009
- Publisher: AWWA
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The California Department of Public Health (CDPH) is treating NDMA and 1,4-dioxane as surrogates for advanced oxidation process (AOP) performance and including the Orange County Water District'sOCWD's AOP treatment goals in their Groundwater Recharge Reuse Draft Regulation. This paper discusses the CDPH's proposed draft regulations by illustrating thefollowing: NDMA and 1,4-dioxane are not necessarily good surrogates for AOPs for indirect potable reuse (IPR); the draft regulations show an unintended bias towards UV/H<sub>2</sub>O<sub>2</sub> AOP, that is, NDMA being photoliable, is the technology driver; numeric discharge limits may be more pertinent for contaminant removal than log reduction values, which are typical for disinfection goals; and, selection of the most appropriate AOP will require identification of the contaminants that posethe greatest human health threat on a case-by-case basis. Following the discussion of the CDPH's draft regulations is a proposed plan for establishing a monitoring and validation scheme for AOP systems. Includes 6 references.
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