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KMID : 1024520010100030247
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Journal of the Environmental Sciences
2001 Volume.10 No. 3 p.247 ~ p.252
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The Inactivation and Microbial Regrowth Inhibition of Heterotrophic and Nitrifying Bacteria by Chloramination
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Jo Kwan-Hyung
Kim Pyung-Chong
Woo Dal-Sik
Cho Young-Tai
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Abstract
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This study was performed to evaluate the inactivation and microbial regrowth of heterotrophic and nitrifying bacteria using chloramine as a secondary disinfectant for drinding water distribution system. Three sets of the three reactors filled with the ratio of 3:1, 4:1, and 5:1 were used in these experiments. Chloramine concentration were applied to each set of the reactors with , respectively. For the set with elapsed time and reached to zero level after 7 days. Heterotrophic bacteria remarkably increased and nitrification through the experimenatal period (21 day). Furthermore the regrowth of heterotrophic bacteria and nitrification were not found. More than of chloramine with ratio of 3:1, the nitrification could be inhibited by 2 days of contact time.
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KEYWORD
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chloramination, inactivation, microbial regrowth, heterotrophic bacteria, nitrifying bacteria, water distribution system
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