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Effects of organic loading rate on hydrogen and volatile fatty acid production and microbial community during acidogenic hydrogenesis in a continuous stirred tank reactor using molasses wastewater

Title
Effects of organic loading rate on hydrogen and volatile fatty acid production and microbial community during acidogenic hydrogenesis in a continuous stirred tank reactor using molasses wastewater
Authors
Yun, J.Cho, K. -S.
Ewha Authors
조경숙
SCOPUS Author ID
조경숙scopus
Issue Date
2016
Journal Title
JOURNAL OF APPLIED MICROBIOLOGY
ISSN
1364-5072JCR Link1365-2672JCR Link
Citation
vol. 121, no. 6, pp. 1627 - 1636
Keywords
acidogenic hydrogenesismicrobial communitymolassesnetworking analysisRNA-based sequencing
Publisher
WILEY-BLACKWELL
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Aims: Microbial community associated with hydrogen production and volatile fatty acids (VFAs) accumulation was characterized in acidogenic hydrogenesis using molasses wastewater as a feedstock. Methods and Results: Hydrogen and VFAs production were measured under an organic loading rate (OLR) from 19 to 35 g-COD l(-1) day(-1). The active microbial community was analysed using RNA-based massively parallel sequencing technique, and their correlation patterns were analysed using networking analysis. The continuous stirred tank reactor achieved stable hydrogen production at different OLR conditions, and the maximum hydrogen production rate (HPR) was 1.02 L-H-2 l(-1) day(-1) at 31.0 g-COD l(-1) day(-1). Butyrate (50%) and acetate (38%) positively increased with increase in OLR. Total VFA production stayed around 7135 mg l(-1) during the operation period. Although Clostridiales and Lactobacillales were relatively abundant, the HPR was positively associated with Pseudomonadaceae and Micrococcineae. Total VFA and acetate, butyrate and propionate concentrations were positively correlated with lactic acid bacteria (LAB) such as Bacillales, Sporolactobacillus and Lactobacillus. Conclusions: The close relationship between Pseudomonadaceae and Micrococcineae, and LAB play important roles for stable hydrogen and VFA production from molasses wastewater. Significance and Impact of the Study: Microbial information on hydrogen and VFA production can be useful to design and operate for acidogenic hydrogenesis using high strength molasses wastewater.
DOI
10.1111/jam.13316
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엘텍공과대학 > 환경공학전공 > Journal papers
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