• AWWA ACE91058
Provide PDF Format

Learn More

AWWA ACE91058

  • Pilot Plant Optimization of the Chlorine Dioxide Treatment Process for Disinfection By-Product Reduction
  • Conference Proceeding by American Water Works Association, 01/01/1991
  • Publisher: AWWA

$12.00$24.00


In Evansville, Indiana, for the past eight years, the use of chlorine dioxide has kept total trihalomethane levels between 0.05 and 0.08 mg/L. However, in light of impending regulations on chlorite and chlorate disinfection by-products, the Evansville utility initiated a research effort to fully evaluate and optimize disinfection by-product reduction using chlorine dioxide. The research focused on: (1) parallel pilot-plant evaluation of disinfection using chlorine dioxide and ozone, and (2) reducing both chlorine dioxide residual and the formation of the inorganic byproduct ions, chlorite and chlorate. Trihalomethanes, haloacetonitriles, haloacetic acids, chloral hydrate, chloropicrin, chloropropanone, total organic halide, total organic carbon, aldehydes and ketones are among a select group of byproduct compounds and surrogates evaluated in this project. Applying ferrous iron to drinking water treated with chlorine dioxide appears to be an effective and economic method of removing residual chlorine dioxide and chlorite ion. Both oxidants were eliminated from the water supply in minutes at pH 6.0-7.0, and results indicate that excess reductant is easily controlled by prefilter chlorination. Coupled with control of chlorate ion formation by optimized chlorine dioxide generation and application, the use of this reducing agent greatly minimizes finished water residual oxidant levels.

Related Products

AWWA MTC61196

AWWA MTC61196

Universal Design of a Submerged Hollow Fiber Membrane System for a Membrane Bioreactor..

$12.00 $24.00

AWWA JAW3817

AWWA JAW3817

Journal AWWA - Health Effects of Alternate Disinfectants and Their Reaction Products ..

$15.00 $30.00

AWWA JAW50923

AWWA JAW50923

Journal AWWA - Legislation/Regulation -- Environmental Justice and Drinking Water Regulations..

$15.00 $30.00

AWWA ACE71113

AWWA ACE71113

Chemical Feed: Keeping the Chlorine Flowing..

$12.00 $24.00