Journal
BIORESOURCE TECHNOLOGY
Volume 143, Issue -, Pages 512-518Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.06.014
Keywords
Anaerobic degradation; Corn straw; Microbial community; 16S rRNA gene clone library
Funding
- National Natural Science Foundation of China [51078344]
- National Key Technology Research and Development Program of the Ministry of Science and Technology of China [2010BAC67B03]
- Knowledge Innovation Program of the Chinese Academy of Sciences [KSCX2-EW-J-10]
- Program Foundation for the Talent Introduction by Qingdao City [11-2-4-15-YX]
- 863 Program [2011AA060905]
- Taishan Scholar Program of Shandong Province
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A 168 rRNA gene-based method was used to characterize the structure of bacterial and archaeal communities in a full-scale, anaerobic reactor treating corn straw. Degradability experiment indicated biogas slurry had high microbial activity, the TS removal rate was 53% and the specific methanogenic activity was 86 mL CH4 g VSS-1 d(-1). During anaerobic degradation of corn straw, volatile acids and aromatic compounds (p-cresol, phenylpropionate, phenol and benzoate) were detected as transient intermediates. Phylogenetic analysis revealed bacterial community exhibited high diversity, 69 bacterial phylotypes in 13 phyla were identified. Firmicutes (48.3%), Chlorollexi (20.1%), Actinobacteria (9.1%), Bacteroidetes (7.7%), and Proteobacteria (7.2%) represented the most abundant bacterial phyla. Hydrolytic and fermentative bacteria were major bacterial populations. Moreover, a relatively high proportion of syntrophic propionate and aromatic compounds degrading bacteria were detected. In the archaeal clone library, 11 archaeal phylotypes affiliated with two phyla of Crenarchaeota (10%) and Euryarchaeota (90%) were identified. (C) 2013 Elsevier Ltd. All rights reserved.
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