Back to Search
Start Over
Bioelectrochemical system accelerates microbial growth and degradation of filter paper
- Source :
- Applied Microbiology and Biotechnology. 89:449-455
- Publication Year :
- 2010
- Publisher :
- Springer Science and Business Media LLC, 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.
- Subjects :
- Paper
Bioelectric Energy Sources
Molecular Sequence Data
Biology
Methanothermobacter
Bacterial growth
Applied Microbiology and Biotechnology
Methane
Cathodic protection
chemistry.chemical_compound
Bioreactors
Bioelectrochemical reactor
Electrochemistry
Cellulose
Bacteria
Ecology
General Medicine
Biodegradation
Pulp and paper industry
biology.organism_classification
Archaea
Refuse Disposal
Biodegradation, Environmental
chemistry
Microbial population biology
Carbon dioxide
Biotechnology
Subjects
Details
- ISSN :
- 14320614 and 01757598
- Volume :
- 89
- Database :
- OpenAIRE
- Journal :
- Applied Microbiology and Biotechnology
- Accession number :
- edsair.doi.dedup.....caf09a1cf754bf25571c0267a3c54518