Methane production in an UASB reactor operated under periodic mesophilic-thermohilic conditions

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DOIResolve DOI: http://doi.org/10.1002/bit.21850
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TypeArticle
Journal titleBiotechnology and Bioengineering
Volume100
Issue6
Pages11151121; # of pages: 7
SubjectENV; periodic operation; temperature; thermophilic-mesophilic consortium; anaerobic degradation
AbstractMethane production was studied in a laboratory-scale 10 L anaerobic upflow sludge bed (UASB) reactor with periodic variations of the reactor temperature. On a daily basis the temperature was varied between 35 and 45°C or 35 and 55°C with a heating period of 6 h. Each temperature increase was accompanied by an increase in methane production and a decrease in the concentration of soluble organic matter in the effluent. In comparison to a reactor operated at 35°C, a net increase in methane production of up to 22% was observed. Batch activity tests demonstrated a tolerance of mesophilic methanogenic populations to short-term, 2–6 h, temperature increases, although activity of acetoclastic methanogens decreased after 6 h exposure to a temperature of 55°C. 16S sequencing of DGGE bands revealed proliferation of temperature-tolerant Methanospirillum hungatii sp. in the reactor.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Biotechnology Research Institute
Peer reviewedNo
NRC number49099
NPARC number12440520
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Record identifierde129452-3237-449b-96ed-73b5545691d3
Record created2009-10-26
Record modified2016-05-09
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