Journal
WATER RESEARCH
Volume 160, Issue -, Pages 339-349Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2019.05.014
Keywords
Drinking water; Ozone disinfection; Chlorine-resistant bacteria; Bacillus cereus spores; Inactivation mechanism
Funding
- National Natural Science Foundation of China [51878215]
- Natural Science Foundation of Guangdong Province, China [2018A030313185]
- Shenzhen Science and Technology Innovation Project [KJYY20171011144235970, JCYJ20170307150223308]
- Shenshui Baoan Water Group Co., Ltd
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The wide application of chlorine disinfectant for drinking water treatment has led to the appearance of chlorine-resistant bacteria, which pose a severe threat to public health. This study was performed to explore the physiological-biochemical characteristics and environmental influence (pH, temperature, and turbidity) of seven strains of chlorine-resistant bacteria isolated from drinking water. Ozone disinfection was used to investigate the inactivation effect of bacteria and spores. The DNA concentration and cell surface structure variations of typical chlorine-resistant spores (Bacillus cereus spores) were also analysed by real-time qPCR, flow cytometry, and scanning electron microscopy to determine their inactivation mechanisms. The ozone resistance of bacteria (Aeromonas jandaei < Vogesella perlucida < Pelomonas < Bacillus cereus
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