| DOI | Resolve DOI: https://doi.org/10.1016/j.renene.2019.06.134 |
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| Author | Search for: Mockaitis, Gustavo1ORCID identifier: https://orcid.org/0000-0002-4231-1056; Search for: Bruant, Guillaume1; Search for: Guiot, Serge R.1; Search for: Peixoto, GuilhermeORCID identifier: https://orcid.org/0000-0002-7879-1661; Search for: Foresti, Eugenio; Search for: Zaiat, Marcelo |
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| Affiliation | - National Research Council of Canada. Energy, Mining and Environment
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| Format | Text, Article |
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| Subject | dark fermentation; kinetics; biohydrogen; anaerobic; acidogenesis |
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| Abstract | Xylose is a by-product of lignocellulosic biomass processing for production of second-generation biofuels and could be suitable for bioproduct manufacturing. This paper describes an innovative approach that enables the system to achieve high yielding for hydrogen production. The study compared 4 physicochemical pre-treatments performed in an anaerobic mixed culture (acidic, thermal, acidic-thermal and thermal acidic) to achieve an inoculum with a high-efficiency xylose to hydrogen conversion under mesophilic conditions (30 °C). The acidic pre-treatment was the most efficient to select microorganisms able to produce hydrogen and volatile acid from xylose. Kinetics has shown that acidic pre-treatment had a hydrogen/xylose molar yielding factor of 1.57 (molar base) and a hydrogen maximum production rate of 253 mL H₂ h⁻¹. Mass balance considered all possible metabolic pathways using xylose as a substrate. Anaerobic degradation of ethanol was the most active pathway for hydrogen production in all experiments, except for the control. Each pre-treatment performed for the original inoculum resulted in different microbiological profiles, but the genus Clostridium was the most abundant in all assays. Acidic pre-treatment stimulated the growth of organisms from the genera Peptostreptococcaceae, Truepera and Kurthia, which could be related to the better results in hydrogen production found in this condition. |
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| Publication date | 2019-06-24 |
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| Publisher | Elsevier |
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| In | |
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| Related publication | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | d544aee2-7c0b-47fb-8035-702e6fe14338 |
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| Record created | 2020-06-25 |
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| Record modified | 2020-10-30 |
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