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Solid-state anaerobic co-digestion of highland barley straw, food waste, and yak manure:Co-digestion performances and microbial characteristics analysis

Author

Listed:
  • Bao, Rui
  • Feng, Jiaqi
  • Feng, Wenli
  • Li, Xiujin
  • Lu, Xuebin
  • Zuo, Xiaoyu
  • Liu, Rufei
  • Yuan, Hairong

Abstract

Co-digestion performances and microbial characteristics were investigated at solid-state anaerobic co-digestion system for highland barley straw (HBS), food waste (FW) and yak manure (YM). The different mixing ratios of HBS, FW, and YM were set according to the total solid content of different substrates. The results showed that the highest methane was 465.9 mL/g VS when the ratio of HBS:FW:YM was 0:5:1(HFY051), which was 4.5 %–102.6 % higher than those of co-digestion groups, HBS, and YM. The synergistic effect of co-digestion for different substrates contributed 6.3 %–123.1 % to improving methane yields in the first 25 days. Clostridium_sensu_stricto 1 and Fastidiosipila were the key bacterials and Methanosarcina and Methanobacterium were dominant methanogens at genus levels for different experimental groups. LEfSe indicated that 26 species have a great impact on co-digestion experimental groups. Therefore, solid-state anaerobic co-digestion of HBS, FW, and YM could improve the co-digestion performances and achieve higher methane yield.

Suggested Citation

  • Bao, Rui & Feng, Jiaqi & Feng, Wenli & Li, Xiujin & Lu, Xuebin & Zuo, Xiaoyu & Liu, Rufei & Yuan, Hairong, 2025. "Solid-state anaerobic co-digestion of highland barley straw, food waste, and yak manure:Co-digestion performances and microbial characteristics analysis," Renewable Energy, Elsevier, vol. 252(C).
    • Handle: RePEc:eee:renene:v:252:y:2025:i:c:s0960148125011668
    DOI: 10.1016/j.renene.2025.123504
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    References listed on IDEAS

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    1. Rao Muhammad Ahmad & Sabiha Javied & Ambreen Aslam & Saud Alamri & Qamar uz Zaman & Ayesha Hassan & Nabeela Noor, 2024. "Optimizing Biogas Production and Digestive Stability through Waste Co-Digestion," Sustainability, MDPI, vol. 16(7), pages 1-15, April.
    2. Bao, Rui & Wei, Yufang & Guan, Ruolin & Li, Xiujin & Lu, Xuebin & Rong, Siyuan & Zuo, Xiaoyu & Yuan, Hairong, 2023. "High-solids anaerobic co-digestion performances and microbial community dynamics in co-digestion of different mixing ratios with food waste and highland barley straw," Energy, Elsevier, vol. 262(PB).
    3. Qi, Chuanren & Cao, Dingge & Gao, Xingzu & Jia, Sumeng & Yin, Rongrong & Nghiem, Long D. & Li, Guoxue & Luo, Wenhai, 2023. "Optimising organic composition of feedstock to improve microbial dynamics and symbiosis to advance solid-state anaerobic co-digestion of sewage sludge and organic waste," Applied Energy, Elsevier, vol. 351(C).
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