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Anaerobic granular sludge as a microbial platform for theconversion of gaseous substrates at moderate pressures

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Resumo:As the end of fossil fuels-era is approaching, new biotechnological alternatives for biofuels and biochemicals production are emerging. Here we focus on the use of gaseous substrates, namely H2/CO2 and CO/H2/CO2 (syngas) as carbon and energy sources for the production of compounds with economical value, such as biomethane and fatty-acids by anaerobic granular sludge at moderate pressures up to 5×105 Pa. It was proven that anaerobic granular sludge can stand increased H2/CO2 pressure maintaining a high rate of methane production. On the other hand, the rise of syngas pressure up to 5×105 Pa led to a reduction on CO and H2 consumption rates and to a shift towards the formation of propionate and butyrate. The increase of initial H2/CO2 or syngas total pressure resulted in a specialization of the microbial communities. Anaerobic granular sludge was a stable and efficient microbial platform for the conversion of gaseous substrates.
Autores principais:Alves, Joana I.
Outros Autores:Lopes, Marlene; Arantes, Ana Luísa; Belo, Isabel; Sousa, Diana Zita Machado; Alves, M. M.
Ano:2019
País:Portugal
Tipo de documento:comunicação em conferência
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho
Descrição
Resumo:As the end of fossil fuels-era is approaching, new biotechnological alternatives for biofuels and biochemicals production are emerging. Here we focus on the use of gaseous substrates, namely H2/CO2 and CO/H2/CO2 (syngas) as carbon and energy sources for the production of compounds with economical value, such as biomethane and fatty-acids by anaerobic granular sludge at moderate pressures up to 5×105 Pa. It was proven that anaerobic granular sludge can stand increased H2/CO2 pressure maintaining a high rate of methane production. On the other hand, the rise of syngas pressure up to 5×105 Pa led to a reduction on CO and H2 consumption rates and to a shift towards the formation of propionate and butyrate. The increase of initial H2/CO2 or syngas total pressure resulted in a specialization of the microbial communities. Anaerobic granular sludge was a stable and efficient microbial platform for the conversion of gaseous substrates.