期刊
JOURNAL OF MOLECULAR MICROBIOLOGY AND BIOTECHNOLOGY
卷 27, 期 5, 页码 306-317出版社
KARGER
DOI: 10.1159/000479108
关键词
Acetoclastic methanogenesis; Anaerobic digestion; Biogas production; Hydrogenotrophic methanogenesis; Syntrophic bacteria; 16S metagenomics
资金
- Cinvestav (Mexico)
- Consejo Nacional de Ciencia y Tecnologia (CONACyT, Mexico) [205945]
- ABACUS - Consejo Nacional de Ciencia y Tecnologia (CONACyT)
- CONACyT
Biogas production from animal waste is an economically viable way to reduce environmental pollution and produce valuable products, i.e., methane and a nutrient-rich organic waste product. An anaerobic digestion reactor for biogas production from pig waste was sampled at the entrance, middle (digestion chamber), and exit of a digester, while the bacterial and archaeal community structure was studied by 16S rRNA gene metagenomics. The number of bacterial operational taxonomic units (OTU)-97% was 3-7 times larger than that of archaeal ones. Bacteria and Archaea found in feces of animals (e.g., Clostridiaceae, Lachnospiraceae, Ruminococcaceae, Methanosarcina, Methanolobus, Methanosaeta, and Methanospirillum) dominated the entrance of the digester. The digestion chamber was dominated by anaerobic sugar-fermenting OP9 bacteria and the syntrophic bacteria Candidatus Cloacamonas (Waste Water of Evry 1; WWE1). The methanogens dominant in the digestion chamber were the acetoclastic Methanosaeta and the hydrogenothrophic Methanoculleus and Methanospirillum. Similar bacterial and archaeal groups that dominated in the middle of the digestion chamber were found in the waste that left the digester. Predicted functions associated with degradation of xenobiotic compounds were significantly different between the sampling locations. The microbial community found in an anaerobic digestion reactor loaded with pig manure contained microorganisms with biochemical capacities related to the 4 phases of methane production. (c) 2017 S. Karger AG, Basel
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