NDLI: Occurrence and reactivation of viable but non-culturable E. coli in sewage sludge after mesophilic and thermophilic anaerobic digestion

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Occurrence and reactivation of viable but non-culturable E. coli in sewage sludge after mesophilic and thermophilic anaerobic digestion

Content Provider	Springer Nature Link
Author	Fu, Bo Jiang, Qian Liu, Hongbo Liu, He
Copyright Year	2013
Abstract	The occurrence and reactivation of viable but non-culturable (VBNC) Escherichia coli after different anaerobic digestions and the subsequent dewatering and storage were evaluated and compared. Culturable E. coli in digested sludge increased by two to four orders of magnitudes immediately after dewatering. However, counts of both the total and viable E. coli indicated that the increase of E. coli was attributed to its reactivation from the VBNC state to the culturable state. The VBNC pathogen incidences of thermophilic digestion were two to three orders of magnitude higher than those of mesophilic digestion. Accordingly, culturable E. coli in thermophilic, digested sludge after storage were one order of magnitude higher than mesophilic digestion. Anaerobic digestion thus mainly alters the culturable state of pathogens rather than killing them; therefore the biological safety of digested sludge, especially temperature-phased anaerobic digestion, should be carefully assessed.
Starting Page	273
Ending Page	279
Page Count	7
File Format	PDF
ISSN	01415492
Journal	Biotechnology Letters
Volume Number	36
Issue Number	2
e-ISSN	15736776
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-10-08
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Anaerobic digestion Dewatering E. coli Non-culturable bacteria Pathogens in sewage Sewage safety Sludge Viable but non-culturable bacteria Microbiology Biotechnology Applied Microbiology Biochemistry
Content Type	Text
Resource Type	Article
Subject	Medicine Bioengineering Applied Microbiology and Biotechnology Biotechnology

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