Biological and Chemical Engineering, Aarhus University, Hangovej 2, DK-8200 Aarhus N, Denmark; Danish Gas Technology Centre, Dr. Neergaards Vej 5B, DK-2970 Horsholm, Denmark.
Danish Gas Technology Centre, Dr. Neergaards Vej 5B, DK-2970 Horsholm, Denmark.
Bioresour Technol. 2018 Sep;264:359-369. doi: 10.1016/j.biortech.2018.06.013. Epub 2018 Jun 14.
Biogas upgrading technologies have received widespread attention recently and are researched extensively. Microbial biogas upgrading (biomethanation) relies on the microbial performance in enriched H and CO environments. In this review, recent developments and applications of CH enrichment in microbial methanation processes are systematically reviewed. During biological methanation, either H can be injected directly inside the anaerobic digester to enrich CH by a consortium of mixed microbial species or H can be injected into a separate bioreactor, where CO contained in biogas is coupled with H and converted to CH, or a combination hereof. The available microbial technologies based on hydrogen-mediated CH enrichment, in particular ex-situ, in-situ and bioelectrochemical, are compared and discussed. Moreover, gas-liquid mass transfer limitations, and dynamics of bacteria-archaea interactions shift after H injection are thoroughly discussed. Finally, the summary of existing demonstration, pilot plants and commercial CH enrichment plants based on microbial biomethanation are critically reviewed.
沼气升级技术最近受到广泛关注，研究也在广泛开展。微生物沼气升级（沼气甲烷化）依赖于富 H 和 CO 环境中微生物的性能。本综述系统地回顾了微生物甲烷化过程中 CH 富集的最新进展和应用。在生物甲烷化过程中，要么可以直接向厌氧消化器中注入 H，通过混合微生物种群的共生体来富集 CH，要么可以将 H 注入单独的生物反应器中，在那里沼气中所含的 CO 与 H 耦合并转化为 CH，或者两者的组合。基于氢介导的 CH 富集的现有微生物技术，特别是异位、原位和生物电化学技术，进行了比较和讨论。此外，还彻底讨论了 H 注入后气液传质限制和细菌-古菌相互作用的动力学变化。最后，对基于微生物生物甲烷化的现有示范、中试工厂和商业 CH 富集工厂进行了批判性回顾。
