Novel insights from lignocellulosic waste to biogas through regulated dry-wet combined anaerobic digestion: Focusing on mining key microbes,Bioresource Technology

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Novel insights from lignocellulosic waste to biogas through regulated dry-wet combined anaerobic digestion: Focusing on mining key microbes
Bioresource Technology ( IF 9.7 ) Pub Date : 2022-01-29 , DOI: 10.1016/j.biortech.2022.126778
Yi Liang ₁ , Lixin Zhao ₂ , Yubin Zhao ₃ , Zaixing Li ₄ , Jing Feng ₅ , Zonglu Yao ₂ , Bingnan Ye ₅ , Jiankun Chen ₅ , Zhifang Ning ₄ , Peiqi Li ₁ , Jiadong Yu ₆

Affiliation

School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, PR China; Key Laboratory of Energy Resource Utilization from Agricultural Residues, Institute of Energy and Environmental Protection, Academy of Agricultural Planning and Engineering, Ministry of Agriculture, Beijing 100125, PR China.
Institute of Agriculture Environment and Sustainable Development, Chinese Academy of Agriculture Science, Beijing 100081, PR China.
Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China.
School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, PR China.
Key Laboratory of Energy Resource Utilization from Agricultural Residues, Institute of Energy and Environmental Protection, Academy of Agricultural Planning and Engineering, Ministry of Agriculture, Beijing 100125, PR China.
Key Laboratory of Energy Resource Utilization from Agricultural Residues, Institute of Energy and Environmental Protection, Academy of Agricultural Planning and Engineering, Ministry of Agriculture, Beijing 100125, PR China; Institute of Agriculture Environment and Sustainable Development, Chinese Academy of Agriculture Science, Beijing 100081, PR China.

Dry-wet combined anaerobic digestion is a novel approach for treating lignocellulosic waste by increasing the organic load of reactor while accelerating the conversion of organic acids. Here, we investigated the effect of regulated substrate ratios and initial pH in the dry acidogenesis stage on the bioconversion efficiency of dry-wet combined anaerobic digestion. Our data revealed microbial interactions and further identified key microbes based on microbial co-occurrence network analysis. On day three of acidification, the kinetic hydrolysis rate and acidification yield reached 1.66 and 60.07%, respectively; this was attributed to enhancement of the synergistic effect between and , which increased the proportion of corn straw in the substrate or lowered the initial spray slurry pH to 5.5–6.5. With increased acidification capacity, acetoclastic methanogens were enriched in the wet methanogenesis stage; the syntrophic effect of , and , meanwhile, was enhanced, leading to an overall improvement in biogas production.

中文翻译：

通过调节干湿联合厌氧消化将木质纤维素废物转化为沼气的新见解：专注于挖掘关键微生物

干湿联合厌氧消化是一种通过增加反应器有机负荷同时加速有机酸转化来处理木质纤维素废物的新方法。在这里，我们研究了干酸生成阶段调节的底物比例和初始 pH 对干湿联合厌氧消化生物转化效率的影响。我们的数据揭示了微生物之间的相互作用，并根据微生物共现网络分析进一步识别了关键微生物。酸化第三天，动力学水解率和酸化收率分别达到1.66和60.07%；这是由于和之间的协同效应增强，增加了基质中玉米秸秆的比例或将初始喷浆pH值降低至5.5-6.5。随着酸化能力的增加，湿产甲烷阶段乙酸碎屑产甲烷菌富集；同时，、和的互养效应增强，导致沼气产量整体提高。

更新日期：2022-01-29

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