Research Article
Jun 1978
Kinetics of Bacterial Deactivation with Chlorine
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VIEW THE REPLYAuthors: Robert E. Selleck, M.ASCE, Bernard M. Saunier, AM.ASCE, and Harvey F. CollinsAuthor Affiliations
Publication: Journal of the Environmental Engineering Division
Volume 104, Issue 6
Abstract
A power function relating coliform bacteria deactivation to the product of the chlorine contact time, t, and the initial chlorine residual concentration, R, is applied to disinfection data procured under a wide range of operating and reaction conditions. The results indicate that the deactivation becomes independent of the operating and reaction conditions when the tR product attains a value of approx 540 min-mg/l with those residuals that are actively oxidizing, ammonia nitrogen being the most effective at lesser tR products followed closely by low pH-free residuals. A combined residual may demonstrate an initial phase of rapid disinfection if the appropriate continuous flow reactor technology is employed and the chlorine to ammonia application ratio is not too small. This initial phase of disinfection is ascribed to chlorine oxidation-reduction reactions rather than unreacted free chlorine.
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Published In
Journal of the Environmental Engineering Division
Volume 104 • Issue 6 • June 1978
Pages: 1197 - 1212
Copyright
© 1978 American Society of Civil Engineers.
History
Published in print: Jun 1978
Published online: Feb 11, 2021
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Authors
Affiliations
Robert E. Selleck, M.ASCE
Prof., Dept. of Civ. Engrg., Univ. of California, Berkeley, Calif.
Bernard M. Saunier, AM.ASCE
Consulting Engr., Saunier Eau & Environment, Rennes, France.
Harvey F. Collins
Supervising Engr., California Dept. of Health, Sacramento, Calif.
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