期刊
WATER RESEARCH
卷 43, 期 4, 页码 971-978出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2008.11.041
关键词
Biodegradation; Disinfection byproduct; Distribution system; Haloacetic acid; Heterotrophic bacteria; Chlorine residual
资金
- United States Environmental Protection Agency's Small Public Water Systems Technology Assistance Center at Penn State Harrisburg
The occurrences of trihalomethanes (THMs), haloacetic acids (HAAS) and heterotrophic bacteria were monitored in five small water systems over a nine-month period to investigate the association between HAA degradation and heterotrophic bacteria populations. The sampling sites were chosen to cover the entire distribution network for each system. An inverse association between heterotrophic bacteria and HAA concentrations was found at some locations where chlorine residuals were around or less than 0.3 mg L-1. At other sample locations, where chlorine residuals were higher (over 0.7 mg L-1), no HAA reduction was observed. A high heterotrophic bacteria count accompanied with a low chlorine residual could be used as an indicator for HAA degradation in distribution systems. (C) 2008 Elsevier Ltd. All rights reserved.
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