NDLI: Bioelectrochemical system accelerates microbial growth and degradation of filter paper

Content Provider	Springer Nature Link
Author	Sasaki, Kengo Hira, Shin ichi Morita, Masahiko Sasaki, Daisuke Matsumoto, rio Ohmura, Naoya Igarashi, Yasuo
Copyright Year	2010
Abstract	Bioelectrochemical reactors (BERs) with a cathodic working potential of −0.6 or −0.8 V more efficiently degraded cellulosic material, i.e., filter paper (57.4–74.1% in 3 days and 95.9–96.3% in 7 days) than did control reactors without giving exogenous potential (15.4% in 3 days and 64.2% in 7 days). At the same time, resultant conversions to methane and carbon dioxide in cathodic working chamber of BERs by application of electrochemical reduction in 3 days of operation were larger than control reactors. However, cumulative methane production in cathodic BERs was similar to those in control reactors after 7 days of operation. Microscopic observation and 16S rRNA gene analysis showed that microbial growth in the entire consortium was higher after 2 days of operation of cathodic BERs as compared with the control reactors. In addition, the number of methanogenic 16S rRNA gene copies in cathodic BERs was higher than in control reactors. Moreover, archaeal community structures constructed in cathodic BERs consisted of hydrogenotrophic methanogen-related organisms and differed from those in control reactors after 2 days of operation. Specifically, the amount of Methanothermobacter species in cathodic BERs was higher within archaeal communities than in those control reactors after 2 days of operation. Electrochemical reduction may be effective for accelerating microbial growth in the start-up period and thereby increasing microbial treatment of cellulosic waste and methane production.
Starting Page	449
Ending Page	455
Page Count	7
File Format	PDF
ISSN	01757598
Journal	Applied Microbiology and Biotechnology
Volume Number	89
Issue Number	2
e-ISSN	14320614
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-11-23
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Bioelectrochemical reactor Anaerobic degradation Microbial community Cathodic reaction Microbial Genetics and Genomics Microbiology Biotechnology
Content Type	Text
Resource Type	Article
Subject	Medicine Applied Microbiology and Biotechnology Biotechnology

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