NDLI: Source identification of bacterial and viral pathogens and their survival/fading in the process of wastewater treatment, reclamation, and environmental reuse

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Source identification of bacterial and viral pathogens and their survival/fading in the process of wastewater treatment, reclamation, and environmental reuse

Content Provider	Springer Nature Link
Author	Zhou, Jinhong Wang, Xiaochang C. Ji, Zheng Xu, Limei Yu, Zhenzhen
Copyright Year	2014
Abstract	Pathogenic safety is drawing wide concern in water reclamation and reuse. In order to elucidate survive/fade of pathogens during the processes of wastewater treatment and reclamation, general indicators (fecal coliform and Escherichia coli), pathogenic bacteria (Salmonella and Shigella) and viruses (enterovirus, rotavirus and norovirus) were investigated in an A$^{2}$O-MBR system. Attention was paid to their strengths from different sources, at various stages of the treatment, and in the product water. According to findings, black water was the main source for pathogens—at least 1–2-log higher in concentration than those from other sources. The preliminary treatment of wastewater by fine screens could bring about 0.2–0.4-log removal for almost all pathogens. The biological treatment units achieved almost identical removal (1.3–1.7-log) for bacteria and viruses. However, subsequent treatment in the membrane bioreactor showed varied removal for fecal coliform (4.7-log), E. coli (2.6-log) and the other pathogens (0.7–1.0-log), indicating that a high reduction of indicator bacteria may not imply equivalent removal of bacterial and viral pathogens. Chlorination was proved to be effective for eliminating all pathogens. In the artificial lake where the product water was stored, fecal coliform was not detected during the study period, but E. coli and pathogens were frequently detected, indicating that these bacterial and viral pathogens may be originating from non-fecal sources. On sunny summer days, the lake water could be bacteria-free due to sunlight radiation, but viruses were still detectable. Therefore, secondary disinfection may have to be adopted when the reclaimed water stored in such an open reservoir is supplied for strict reuse purposes.
Starting Page	109
Ending Page	120
Page Count	12
File Format	PDF
ISSN	09593993
Journal	World Journal of Microbiology and Biotechnology
Volume Number	31
Issue Number	1
e-ISSN	15730972
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-11-06
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Wastewater treatment Water reclamation Source identification Pathogens removal Real-time PCR Applied Microbiology Biotechnology Biochemistry Environmental Engineering/Biotechnology Microbiology
Content Type	Text
Resource Type	Article
Subject	Physiology Medicine Applied Microbiology and Biotechnology Biotechnology

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Source identification of bacterial and viral pathogens and their survival/fading in the process of wastewater treatment, reclamation, and environmental reuse