AWWA JAW28859

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.

Product Details

Edition:

Vol. 83 - No. 3

Published:

03/01/1991

Number of Pages:

9

File Size:

1 file , 1.9 MB