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RECORD NUMBER: 19 OF 200

Main Title Modeling Chlorine Residuals in Drinking-Water Distribution Systems.
Author Rossman, L. A.; Clark, R. M.; Grayman, W. M.;
CORP Author Environmental Protection Agency, Cincinnati, OH. Drinking Water Research Div.
Publisher 1994
Year Published 1994
Report Number EPA/600/J-94/379;
Stock Number PB95-125530
Subjects Potable water; Distribution systems; Water distribution; Chlorine; Computerized simulation; Water pollution abatement; Reprints; Disinfection; Microbial degradation; Reaction kinetics; Water quality management; Mass transfer; EPANET computer program
Holdings
Library   Call Number Additional Info Location Date Modified
NTIS PB95-125530 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 03/06/1995
Collation 22p
Abstract A mass transfer-based model is developed for predicting chlorine decay in drinking water distribution networks. The model considers first order reactions of chlorine to occur both in the bulk flow and at the pipe wall. The overall rate of the wall reaction is a function of the rate of mass transfer of chlorine to the wall and is therefore dependent on pipe geometry and flow regime. The model can thus explain field observations that show higher chlorine decay rates associated with smaller pipe sizes and higher flow velocities. It has been incorporated into a computer program call EPANET that can perform dynamic water quality simulations on complex pipe networks. The model is applied to chlorine measurements taken at nine locations over a 53 hour period from a portion of the South Central Connecticut Regional Water Authority's service area. Good agreement with observed chlorine levels over a range of assumed wall decay constants is obtained at locations where the hydraulics are well-characterized. The model should prove to be a valuable tool for managing chlorine disinfection practices in drinking water distribution systems.
Supplementary Notes Pub. in Jnl. of Environmental Engineering, Paper no. 5922, v120 n4 p803-820 Jul/Aug 94.
NTIS Title Notes Journal article.
Title Annotations Reprint: Modeling Chlorine Residuals in Drinking-Water Distribution Systems.
Category Codes 68D; 99F
NTIS Prices PC A03/MF A01
Primary Description 600/14
Document Type NT
Control Number 435317998
Cataloging Source NTIS/MT
Origin NTIS
Type CAT


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