<P><B>Abstract</B></P> <P>Microbial community structure in a farm-scale anaerobic digester treating swine manure was investigated during three process events: 1) prolonged starvation, and changes of 2) operating temperat...
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https://www.riss.kr/link?id=A107505635
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2017
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SCI,SCIE,SCOPUS
학술저널
167-176(10쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P><B>Abstract</B></P> <P>Microbial community structure in a farm-scale anaerobic digester treating swine manure was investigated during three process events: 1) prolonged starvation, and changes of 2) operating temperat...
<P><B>Abstract</B></P> <P>Microbial community structure in a farm-scale anaerobic digester treating swine manure was investigated during three process events: 1) prolonged starvation, and changes of 2) operating temperature (between meso- and thermophilic) and 3) hydraulic retention time (HRT). Except during the initial period, the digester was dominated by hydrogenotrophic methanogens (HMs). The bacterial community structure significantly shifted with operating temperature and HRT but not with long-term starvation. Clostridiales (26.5–54.4%) and Bacteroidales (2.5–13.7%) became dominant orders in the digester during the period of HM dominance. Abundance of diverse meso- and thermophilic bacteria increased during the same period; many of these species may be H<SUB>2</SUB> producers, and/or syntrophic acetate oxidizers. Some of these species showed positive correlations with [NH<SUB>4</SUB> <SUP>+</SUP>-N] (<I>p</I> <0.1); this relationship suggests that ammonia was a significant parameter for bacterial selection. The bacterial niche information reported in this study can be useful to understand the ecophysiology of anaerobic digesters treating swine manure that contains high ammonia content.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Microbial community was elucidated in a farm-scale digester treating swine manure. </LI> <LI> Hydrogenotrophic methanogens were dominant except during the initial period. </LI> <LI> Bacterial community shifted by temperature and HRT but not by prolonged starvation </LI> <LI> Clostridiales and Bacteroidales were the major partner bacterial orders of HMs. </LI> <LI> Some mesophilic partner bacteria were positively correlated with [NH<SUB>4</SUB> <SUP>+</SUP>-N]. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>