Microbial community shifts in a farm-scale anaerobic digester treating swine waste: Correlations between bacteria communities associated with hydrogenotrophic methanogens and environmental conditions

Title
Microbial community shifts in a farm-scale anaerobic digester treating swine waste: Correlations between bacteria communities associated with hydrogenotrophic methanogens and environmental conditions
Authors
조경진신승구김웅이준엽이창수황석환
Keywords
Anaerobic digestion; Swine waste; 454 pyrosequencing; Hydrogen-producing bacteria; Syntrophic acetate oxidizing bacteria; Hydrogenotrophic methanogen
Issue Date
2017-12
Publisher
The Science of the total environment
Citation
VOL 601-602-176
Abstract
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&#8211; 54.4%) and Bacteroidales (2.5&#8211; 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 H2 producers, and/or syntrophic acetate oxidizers. Some of these species showed positive correlations with [NH4+-N] (p < 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.
URI
http://pubs.kist.re.kr/handle/201004/66629
ISSN
0048-9697
Appears in Collections:
KIST Publication > Article
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