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https://hdl.handle.net/1822/51754
Título: | High rate biomethanation of carbon monoxide rich gases via a thermophilic synthetic co-culture |
Autor(es): | Diender, Martijn Uhl, Philipp Bitter, Johannes Hendrik Stams, Alfons Johannes Maria Sousa, Diana Zita Machado |
Palavras-chave: | Methanogenesis Hydrogenogenesis Syngas fermentation Carboxydothermus hydrogenoformans Methanothermobacter thermoautotrophicus Sabatier process |
Data: | Fev-2018 |
Editora: | American Chemical Society (ACS) |
Revista: | ACS Sustainable Chemistry & Engineering |
Citação: | Diender, Martijn; Uhl, Philipp; Bitter, Johannes Hendrik; Stams, A. J. M.; Sousa, Diana Z., High rate biomethanation of carbon monoxide rich gases via a thermophilic synthetic co-culture. |
Resumo(s): | Carbon monoxide-fermenting microorganisms can be used for the production of a wide range of commodity chemicals and fuels from syngas (generated by gasification of e.g. wastes or biomass) or industrial off-gases (e.g. from steel industry). Microorganisms are normally more resistant to contaminants in the gas (e.g. hydrogen sulfide) than chemical catalysts, less expensive and self-regenerating. However, some carboxydotrophs are sensitive to high concentrations of CO, resulting in low growth rates and productivities. We hypothesize that cultivation of synthetic co-cultures can be used to improve overall rates of CO bioconversion. As case study a thermophilic microbial co-culture, consisting of Carboxydothermus hydrogenoformans and Methanothermobacter thermoautotrophicus was constructed to study the effect of co-cultivation on conversion of CO-rich gasses to methane. In contrast to the methanogenic monoculture, the co-culture was able to efficiently utilize CO or mixtures of H2/CO/CO2 to produce methane at high efficiency and high rates. In CSTR-bioreactors operated in continuous mode, the co-culture converted artificial syngas (66.6% H2: 33.3% CO) to an outflow gas with a methane content of 72%, approaching the 75% theoretical maximum. CO conversion efficiencies of 93% and volumetric production rates of 4 m3methane/m3liquid/day were achieved. This case shows that microbial co-cultivation can result in a significant improvement of gas-fermentation of CO-rich gasses. |
Tipo: | Artigo |
Descrição: | The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acssuschemeng.7b03601. |
URI: | https://hdl.handle.net/1822/51754 |
DOI: | 10.1021/acssuschemeng.7b03601 |
ISSN: | 2168-0485 |
e-ISSN: | 2168-0485 |
Versão da editora: | http://pubs.acs.org/journal/ascecg |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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document_47354_1.pdf Acesso restrito! | 1,43 MB | Adobe PDF | Ver/Abrir |