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AWWA JAW28859
- Journal AWWA - The Impact of Ozonation on Particle Stability and the Removal of TOC and THM Precursors
- Journal Article by American Water Works Association, 03/01/1991
- Publisher: AWWA
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Waters from seven utilities that use ozone as a preoxidant were analyzed to determine the impact of ozone on the removal of total organic carbon (TOC) and trihalomethane (THM) precursors and on the collision efficiency factor and electrophoretic mobility of suspended particles in the water. Water quality characteristics that favor the use of ozone as a coagulant aid were identified. Preozonation was shown to lower THM formation potential by about 10 percent at the dosages commonly used in practice, and optimal ozone-induced particle destabilization was found to occur in waters with hardness-to-TOC ratios > 25 mg CaCO3/mg C and ozone doses of about 0.4 - 0.8 mg O3/mg C. Includes 59 references, tables, figures.
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