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The Impact of Extreme Weather Events on Bacterial Communities and Opportunistic Pathogens in a Drinking Water Treatment Plant

by 1,†, 1,†, 1, 1,2, 3, 1,2,* and 1,2
1
School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
2
State Key Laboratory of Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
3
National Inland Waterway Regulation Engineering Research Center, Chongqing Jiaotong University, Chongqing 400074, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editors: Ashwani Kumar Tiwari and Subhash Chandra
Water 2022, 14(1), 54; https://doi.org/10.3390/w14010054
Received: 28 November 2021 / Revised: 19 December 2021 / Accepted: 23 December 2021 / Published: 28 December 2021
Drinking water treatment processes are highly effective at improving water quality, but pathogens can still persist in treated water, especially after extreme weather events. To identify how extreme weather events affected bacterial populations in source and treated water, water samples were collected from the Yangtze River Delta area and a local full-scale drinking water treatment plant. Bacterial community structure and the occurrence of pathogens were investigated in samples using 16S rRNA sequencing and qPCR techniques. In this study, the results show that intense rainfall can significantly increase levels of bacteria and opportunistic pathogens in river and drinking water treatment processes (p < 0.05); in particular, the relative abundance of Cyanobacteria increased after a super typhoon event (p < 0.05). The biological activated carbon (BAC) tank was identified as a potential pathogen reservoir and was responsible for 52 ± 6% of the bacteria released downstream, according to Bayesian-based SourceTracker analysis. Our results provide an insight into the challenges faced by maintaining finished water quality under changing weather conditions. View Full-Text
Keywords: water treatment; extreme weather event; opportunistic pathogen; biological activated carbon tank water treatment; extreme weather event; opportunistic pathogen; biological activated carbon tank
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MDPI and ACS Style

Tang, W.; Liu, Y.; Li, Q.; Chen, L.; Li, Q.; Li, P.; Xia, S. The Impact of Extreme Weather Events on Bacterial Communities and Opportunistic Pathogens in a Drinking Water Treatment Plant. Water 2022, 14, 54. https://doi.org/10.3390/w14010054

AMA Style

Tang W, Liu Y, Li Q, Chen L, Li Q, Li P, Xia S. The Impact of Extreme Weather Events on Bacterial Communities and Opportunistic Pathogens in a Drinking Water Treatment Plant. Water. 2022; 14(1):54. https://doi.org/10.3390/w14010054

Chicago/Turabian Style

Tang, Wei, Yunsi Liu, Qiuyan Li, Ling Chen, Qi Li, Pan Li, and Shengji Xia. 2022. "The Impact of Extreme Weather Events on Bacterial Communities and Opportunistic Pathogens in a Drinking Water Treatment Plant" Water 14, no. 1: 54. https://doi.org/10.3390/w14010054

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