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AWWA WQTC69409
- Impact of Sequential and Preformed Chloramine Dosing on NDMA Formation in Repurified Wastewater
- Conference Proceeding by American Water Works Association, 11/01/2008
- Publisher: AWWA
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This paper presents a study conducted on reuse water from the Gibson Island Advanced Water Treatment Plant (AWTP) in Brisbane, Australia, to determine ifdifferent chloramines dosing conditions affect the formation potential of N-Nitrosodimethylamine(NDMA). The Gibson Island AWTP has an NDMA treated water goal of less than 10 ng/L. Thislimit was established as a result of the plant being a high level reuse facility. Because theeffluent supplements the region's water supply reservoir, potential accumulation ofmicroconstituents is a public health concern. Bench-scale evaluation of NDMA formation whileusing chloramines was a key component to establishing appropriate design criteria. Theobjective of this paper was to provide information regarding bench-scale formation of NDMA whenboth preformed and sequential chloramination are employed, and the impact of pH on NDMAformation. Includes 12 references, table, figures.