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Feasibility of dry anaerobic digestion of beer lees for methane production and biochar enhanced performance at mesophilic and thermophilic temperature
- Sun, Caiyu, Liu, Fang, Song, Zhiwei, Wang, Jing, Li, Yongfeng, Pan, Yu, Sheng, Tao, Li, Lixin
- Bioresource technology 2019 v.276 pp. 65-73
- anaerobic digestion, biochar, cows, lees, methane production, temperature
- This study investigated the feasibility of dry anaerobic digestion using beer lees as substrate and the effect of cow manure-derived biochar addition on dry anaerobic digestion performance at mesophilic and thermophilic temperature, respectively. With TS content of 25%, maximum cumulative methane production and yield were achieved to be 5230 ± 91 mL d−1 and 220.1 ± 7.7 mL g−1 VS at mesophilic condition and 7386 ± 134 mL d−1 and 310.4 ± 9.2 mL g−1 VS at thermophilic condition in the control cultures. The biochar addition has a positive effect in improving dry anaerobic digestion performance. The maximum cumulative methane production and yield in the cultures with 10 g L−1 biochar were substantially improved by 82.9% and 82.6% at mesophilic condition and 47.2% and 46.8% at mesophilic condition when compared to the control.