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Microbial Ecology in Anaerobic Digestion at Agitated and Non-Agitated Conditions
Author(s) -
Zhuoli Tian,
Léa Cabrol,
Gonzalo Ruiz-Filippi,
Pratap Pullammanappallil
Publication year - 2014
Publication title -
hal (le centre pour la communication scientifique directe)
Language(s) - English
DOI - 10.1371/journal.pone.0109769.s003
Subject(s) - anaerobic digestion , ecology , microbial ecology , anaerobic exercise , digestion (alchemy) , environmental science , chemistry , environmental chemistry , biology , chromatography , bacteria , methane , physiology , genetics
International audienceTo investigate the distribution and dynamics of microbial community in anaerobic digestion at agitated and non-agitated condition, 454 pyrosequencing of 16s rRNA was conducted. It revealed the distinct community compositions between the two digesters and their progressive shifting over time. Methanogens and syntrophic bacteria were found much less abundant in the agitated digester, which was mainly attributed to the presence of bacterial genera Acetanaerobacterium and Ruminococcus with relatively high abundance. The characterization of the microbial community corroborated the digestion performance affected at the agitated condition, where lower methane yield and delayed methane production rate were observed. This was further verified by the accumulation of propionic acid in the agitated digester

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