AWWA ACE90013

Because of expected regulation of chlorine dioxide byproducts in drinking water, treatment plants using this alternative disinfectant must look at ways to reduce chlorate and chlorine ion concentrations. This may be accomplished through reducing chlorate formation and/or the removal of chlorine dioxide, chlorate, and chlorite after formation. Two studies were conducted to determine if chlorine dioxide could be used successfully to prevent the formation of trihalomethanes (THMs) during drinking water treatment without resulting in excessive residuals of chlorine dioxide and its byproducts. The first test was conducted in Lee County, Florida, on water that was hard, of moderate pH and turbidity, and high in color and total organic carbon with seasonal variations. The second test was conducted in Scituate, Massachusetts, with water that is soft, low pH, highly colored, contains moderate levels of iron and manganese, and suffers algae blooms during July and August. Results of full-scale testing suggest that granular activated carbon (GAC) may be a viable means for removing chlorite and chlorine dioxide, but not for chlorate.

Product Details

Published:

01/01/1990

ISBN(s):

0898675561

Number of Pages:

26

File Size:

1 file , 950 KB