Inactivation of E. coli by combined action of free chlorine and monochloramine

The inactivation of E. coli by either free chlorine or combined chlorine present alone was determined. A completely stirred tank reactor (CSTR) was used. Both chemicals were then allowed to react simultaneously with E. coli in the same CSTR. The choice of the concentration of the chemicals allowed t...

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Bibliographic Details
Published in:Water research (Oxford) 1991, Vol.25 (9), p.1027-1032
Main Authors: Kouame, Yao, Haas, Charles N.
Format: Article
Language:English
Subjects:
Applied sciences
coliforms
disinfection
Escherichia coli
Exact sciences and technology
free chlorine
General purification processes
monochloramine
Pollution
synergisms
Wastewaters
Water treatment and pollution
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Summary:The inactivation of E. coli by either free chlorine or combined chlorine present alone was determined. A completely stirred tank reactor (CSTR) was used. Both chemicals were then allowed to react simultaneously with E. coli in the same CSTR. The choice of the concentration of the chemicals allowed the comparison of the magnitude of the inactivation in the single and mixed system. It was demonstrated that the interaction between free chlorine and monochloramine in reacting with E. coli was synergistic. The experimental pH and temperature were 8 ± 0.03 and 20 ± 2°C, respectively.
ISSN:0043-1354
1879-2448
DOI:10.1016/0043-1354(91)90195-V