期刊
BIORESOURCE TECHNOLOGY
卷 133, 期 -, 页码 256-262出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.01.121
关键词
Anaerobic digestion; Biohydrogen inhibition; CE-SSCP; Dry solids; Methanogenesis
资金
- French National Research Agency [ANR-08-BIOE-009-03]
In this study, changes in bacterial and archaeal communities involved in anaerobic digestion processes operated with high solid contents were investigated. Batch tests were performed within a range of total solids (TS) of 10-35%. Between 10% and 25% TS, high methanogenic activity was observed and no overall specific structure of active bacterial communities was found. At 30% and 35%, methanogenesis was inhibited as a consequence of volatile fatty acids accumulation. Here, a specific bacterial signature was observed with three main dominant bacteria related to Clostridium sp., known for their ability to grow at low pH. Additionally, archaeal community was gradually impacted by TS content. Three archaeal community structures were observed with a gradual shift from Methanobacterium sp. to Methanosarcina sp., according to the TS content. Overall, several species were identified as biomarkers of methanogenesis inhibition, since bacterial and archaeal communities were highly specific at high TS contents. (C) 2013 Elsevier Ltd. All rights reserved.
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