| DOI | Trouver le DOI : https://doi.org/10.1016/j.renene.2019.06.134 |
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| Auteur | Rechercher : Mockaitis, Gustavo1Identifiant ORCID : https://orcid.org/0000-0002-4231-1056; Rechercher : Bruant, Guillaume1; Rechercher : Guiot, Serge R.1; Rechercher : Peixoto, GuilhermeIdentifiant ORCID : https://orcid.org/0000-0002-7879-1661; Rechercher : Foresti, Eugenio; Rechercher : Zaiat, Marcelo |
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| Affiliation | - Conseil national de recherches du Canada. Énergie, les mines et l'environnement
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| Format | Texte, Article |
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| Sujet | dark fermentation; kinetics; biohydrogen; anaerobic; acidogenesis |
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| Résumé | 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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| Date de publication | 2019-06-24 |
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| Maison d’édition | Elsevier |
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| Dans | |
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| Publication connexe | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | d544aee2-7c0b-47fb-8035-702e6fe14338 |
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| Enregistrement créé | 2020-06-25 |
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| Enregistrement modifié | 2020-10-30 |
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