State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Biogas Upgrading Utilization, College of New Energy and Materials, China University of Petroleum Beijing (CUPB), Beijing 102249, PR China.
Institute of Agriculutral Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China.
Bioresour Technol. 2022 Feb;346:126407. doi: 10.1016/j.biortech.2021.126407. Epub 2021 Nov 23.
Syngas from pyrolysis/gasification process is a mixture of CO, CO and H, which could be converted to CH, so called syngas biomethanation. Its development is obstructed due to the low productivity and CO inhibition. The aim of this study was to demonstrate the feasibility of using syngas as the only carbon source containing high CO concentration (40%) for biomethanation. Lab-scale thermophilic bioreactor inoculated with anaerobic sludge was operated continuously for over 900 h and the shift of microbial structure were investigated. Results showed that thermophilic condition was suitable for syngas biomethanation and the microbes could adapt to high CO concentration. Higher processing capacity of 12.6 m/m/d was found and volumetric methane yield of 2.97 m/m/d was observed. These findings could strengthen the theoretical basis of syngas biomethanation and support its industrialization in the future.
热解/气化过程产生的合成气是 CO、CO 和 H 的混合物，可转化为 CH，即所谓的合成气生物甲烷化。由于生产力低和 CO 抑制，其发展受到阻碍。本研究的目的是证明使用含有高浓度 CO（40%）的合成气作为唯一碳源进行生物甲烷化的可行性。使用厌氧污泥接种的实验室规模高温生物反应器连续运行超过 900 h，并研究了微生物结构的变化。结果表明，高温条件适合合成气生物甲烷化，微生物可以适应高 CO 浓度。发现更高的处理能力为 12.6 m/m/d，观察到的体积甲烷产率为 2.97 m/m/d。这些发现可以加强合成气生物甲烷化的理论基础，并为未来的工业化提供支持。
