期刊
BIORESOURCE TECHNOLOGY
卷 296, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.122294
关键词
Acclimation; Anaerobic co-digestion; Fats, oil, and grease; High-throughput sequencing; Long-chain fatty acids; Biomethane
资金
- National Research Foundation of Korea (NRF), Ministry of Education, Science, and Technology (MEST) of the South Korean government (NRF) [2019R1I1A1A01063318]
- Ministry of Trade, Industry and Energy (MOTIE) of the Republic of Korea [20173010092470]
The methane productivity and long chain fatty acids (LCFAs) degradation capability of unacclimatized seed sludge (USS) and acclimatized seed sludge (ASS) at different substrate ratios of fats oil and grease (FOG) and mixed sewage sludge were investigated in this study. Biogas produced in ASS in initial phase of anaerobic digestion had higher methane content (65-76%) than that in USS (26-73%). The degradation of major LCFAs in the ASS was 22-80%, 33-191%, and 7-64% higher for the substrate ratios of 100:10, 100:20, and 100:30, respectively, as compared to the LCFAs' degradation in USS. Microbial acclimatization increased the population of Firmicutes (40%), Bacteroidetes (32%), Synergistetes (10%), and Euryarchaeota (8%) in ASS, which supported the faster rate of LCFAs degradation for its later conversion to methane. The significant abundance of Syntrophomonas and Methanosarcina genera in ASS supported faster generation rate of methane in an obligatory syntrophic relationship.
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