期刊
BIORESOURCE TECHNOLOGY
卷 333, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.125183
关键词
Syngas methanation; Biomethane; Hydrogen; Upgrading to natural gas quality; Trickle-bed reactor
资金
- Innovation Fund Denmark [5160-00006A]
- Apple Inc.
- Aarhus University
The study demonstrates the methanation and upgrading of syngas to biomethane in a fed-batch trickle-bed reactor system using manure or sludge-based inoculum. Addition of exogenous H2 allows for further upgrading of syngas to biomethane in the same reactors, showing functional redundancy among microbial communities.
Syngas from gasification of waste biomass is a mixture of carbon monoxide (CO), carbon dioxide (CO2), and hydrogen (H2), which can be utilized for the synthesis of biofuels such as methane (CH4). The aim of the study research work was to demonstrate how syngas could be methanated and upgraded to natural gas quality (biomethane) in a fed-batch trickle-bed reactor system using either manure - (AD-M) or sludge-based (AD-WW) inoculum as microbial basis. The methanated syngas had a high concentration of CO2 and did not fulfil the criteria for natural gas quality biomethane. Further upgrading of syngas to biomethane could be achieved simultaneously in the same reactors by addition of exogenous H2, resulting in CH4 concentrations up to 91.0 +/- 3.5% (AD-WW) and 95.3 +/- 1.0% (AD-M). Microbial analysis indicated that the communities differed between AD-M and AD-WW demonstrating functional redundancy among the microbial communities of different inocula.
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