• AWWA WQTC69409

AWWA WQTC69409

Impact of Sequential and Preformed Chloramine Dosing on NDMA Formation in Repurified Wastewater

American Water Works Association , 11/01/2008

Publisher: AWWA

File Format: PDF

$12.00$24.00


This paper presents a study conducted on reuse water from the Gibson Island Advanced Water Treatment Plant (AWTP) in Brisbane, Australia, to determine if different 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. This limit was established as a result of the plant being a high level reuse facility. Because the effluent supplements the region's water supply reservoir, potential accumulation of microconstituents is a public health concern. Bench-scale evaluation of NDMA formation while using chloramines was a key component to establishing appropriate design criteria. The objective of this paper was to provide information regarding bench-scale formation of NDMA when both preformed and sequential chloramination are employed, and the impact of pH on NDMA formation. Includes 12 references, table, figures.

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