高效氢气到 CH 的转化中氢营养型产甲烷颗粒污泥的形成。
Hydrogenotrophic methanogenic granular sludge formation for highly efficient transforming hydrogen to CH.
机构信息
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, PR China.
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, PR China.
出版信息
J Environ Manage. 2022 Feb 1;303:113999. doi: 10.1016/j.jenvman.2021.113999. Epub 2021 Dec 2.
This paper presents a potential process that can enhance H transformation to CH and simultaneously upgrading biogas by using hydrogenotrophic methanogens. For the first time, anaerobic granules were developed in upflow anaerobic sludge blanket (UASB) reactor feeding H/CO syngas as the sole substrate and the granule characterization was thoroughly investigated. The results from experiment revealed that the H consumption rates of UASB reactor increased from 32.2 mmol L·d at H feeding rate 0.08 g L·d to 132.0 mmol L·d at 0.37 g L·d, indicating that the hydrogenotrophic methanogenesis pathway was stimulated by injection of H. Abundant cavities and cracks were observed on the surface and cross-section of granules, which greatly facilitated internally transferring H/CO synthesis gas and biogas escape. The abundance of hydrogenotrophic Methanobacterium increased, while Methanosaeta, Methanosarcina, and Methanomassiliicoccus decreased with increasing H feeding rate. In general, this paper offers a feasible solution in terms of energy transformation and connecting power to fuel.
本文提出了一种潜在的方法，即利用氢营养型产甲烷菌将 H 转化为 CH 并同时升级沼气。本文首次以 H/CO 合成气作为唯一底物在升流式厌氧污泥床（UASB）反应器中开发出厌氧颗粒，并对颗粒特性进行了深入研究。实验结果表明，当 H 进料速率从 0.08 g·L·d 增加到 0.37 g·L·d 时，UASB 反应器的 H 消耗速率从 32.2 mmol·L·d 增加到 132.0 mmol·L·d，表明氢营养型产甲烷途径受到了 H 注入的刺激。颗粒的表面和横截面上观察到丰富的空腔和裂缝，这极大地促进了内部转移 H/CO 合成气和沼气的逸出。随着 H 进料速率的增加，氢营养型甲烷杆菌的丰度增加，而产甲烷菌属、甲烷八叠球菌和甲烷微球菌的丰度降低。总的来说，本文为能源转化和连接电源提供了一种可行的解决方案。
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