Effects of Assimilable Organic Carbon and Free Chlorine on Bacterial Growth in Drinking Water

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Article courtesy of Xiaolu Liu, Jingqi Wang, Tingting Liu, Weiwen Kong, Xiaoqing He, Yi Jin, Bolin Zhang | June 2 , 2015 | PLOS | Shared as educational material

One of the most important factors impacting the re-growth of microorganisms in drinking water is assimilable organic carbon (AOC). In high concentrations, AOC results biological instability. Disinfection, however, wipes out microbes to make drinking water safe. This study explored the combined impacts of AOC and free chlorine, an important oxidizing agent, on bacterial growth in drinking water using flow cytometry (FCM). AOC and free chlorine might have combined effects on microbial growth. In this study, concentrations determined by FCM were higher than those by a traditional method called heterotrophic plate count (HPC), which suggested that HPC misses detecting some forms of E. coli that FCM detected in drinking water.
Read more here: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0128825

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