期刊
BIORESOURCE TECHNOLOGY
卷 214, 期 -, 页码 711-721出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.05.021
关键词
Anaerobic digestion; Microbial management; High-throughput sequencing; Bacterial diversity; Lipid removal
资金
- Korea Ministry of Environment as 'Knowledge based environmental service (Waste to energy recycling) Human resource development Project'
- 'Human Resources Program in Energy Technology' of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) Grant - Ministry of Trade, Industry and Energy, Republic of Korea [20144030200460]
Process parameters and bacterial populations were investigated in four full-scale anaerobic digesters treating sewage sludge. Although the four digesters were operated under similar conditions, digesters A and B had higher pH (7.2-7.4) and lipid removal efficiencies (> 50%) than C and D (pH 6.1-6.4; average lipid removal < 16%). Bacterial richness, diversity, and evenness were higher in digesters C and D. Among the top-populated genera, ten (group I) were more abundant in digesters A and/or B; they were putative syntrophic fatty acid or protein/amino acid-utilizers. In contrast, fifteen others (group II) were less abundant in A and/or B and included potentially dormant/dead cells originated from activated sludge. Despite the overall richness trend, the presence of the 25 genera in groups I/II was greater in digesters A and B (24) than in C and D (17); this observation suggests that group I bacteria might be essential in AD of sewage sludge. (C) 2016 Elsevier Ltd. All rights reserved.
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