Evaluation of semi-continuous operation to hydrogen and volatile fatty acids production using raw glycerol as substrate

Maria Cristina de Almeida Silva, Luiz Olinto Monteggia, José Carlos Alves Barroso Júnior, Camille Eichelberger Granada and Adriana Giongo

Renewable Energy, 2020, vol. 153, issue C, 701-710

Abstract: Two fermenters were operated by semi-continuous mode with suspended biomass and glycerol at concentrations of 10 and 50 g/L to evaluate the semi-continuous operational conditions to hydrogen and volatile fatty acids production. A high hydrogen production in the semi-continuous reactors at the experiment was observed, with a drop during the test, mainly in the reactor with higher substrate concentration. The yield median of the semi-continuous reactors was 0.25 and 0.01 mol H2/mol glycerol, and the volumetric productivity median was 350 and 130 mL H2/L.d in SCR1 and SCR2 (10 and 50 g/L), respectively. It was possible to associate the high hydrogen and volatile fatty acids production in the semi-continuous reactors with the bacterial genus Enterobacter, and the low hydrogen production to the bacterial genus Clostridium.

Keywords: Raw glycerol; Semi-continuous reactors; Hydrogen; VFA (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:153:y:2020:i:c:p:701-710

DOI: 10.1016/j.renene.2020.01.152

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