Synergistic co-digestion of waste commercial yeast and chicken manure: Kinetic simulation, DOM variation and microbial community assessment
| Autor: | Dunjie Li, Hongli Fang, Yongsen Shi, Yu You Li, Rutao Liu, Dong Yuan, Qigui Niu, Liuying Song |
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| Rok vydání: | 2020 |
| Předmět: |
Methanobacterium
Acidogenesis 060102 archaeology biology Renewable Energy Sustainability and the Environment Methanogenesis Chemistry 020209 energy 06 humanities and the arts 02 engineering and technology biology.organism_classification Methanosaeta Biogas Acetogenesis Dissolved organic carbon 0202 electrical engineering electronic engineering information engineering 0601 history and archaeology Chicken manure Food science |
| Zdroj: | Renewable Energy. 162:2272-2284 |
| ISSN: | 0960-1481 |
| DOI: | 10.1016/j.renene.2020.10.038 |
| Popis: | Co-digestion of waste commercial yeast (Saccharomyces cerevisiae) and chicken manure was investigated in batch tests. The objective was to explore potential synergistic effects of the combination substrates. The biogas production rate and biomethane yield, batch kinetic simulation, metabolic dynamic and microbial community comparison were evaluated, respectively. The maximum biomethane yield of 364.79 mL/gVS was obtained at the optimum co-digestion feedstock (S.cerevisiae of 0.69 g/gVS) with a significant reaction rate increased of hydrolysis, acidogenesis, acetogenesis and methanogenesis. Person’s correlation analysis resulted that the dissolved organic matter (DOM) variation had a close correlation with indexes of NADH, NH4+-N, COD, VFAs and F420. The high-throughput sequencing showed that higher diversity was obtained both bacteria and archaea in the optimized condition with more abundant of synergistic bacteria. Moreover, community dynamic reflected that the abundances of hydrogentrophic Methanobacterium and Methanolinea raised from 11.74%, 0.23%–14.49%, 60.78%, respectively. While the proportion of the acetoclastic Methanosaeta was decreased from 88.04% to 24.72% with the increasing of S.cerevisiae dosages from 0.48 g/gVS to1.07 g/gVS. |
| Databáze: | OpenAIRE |
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