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Theses

Optimisation d’un procédé à deux étapes pour la production d’un mélange hydrogène/méthane (biohythane) à partir de la fraction fermentescible des ordures ménagères

Abstract : Two-step process producing biologically a mixture of H2/CH4 (5-20 % of H2) so called biohythane can be used for organic fraction of municipal solid waste valorization (OFMSW). The first step consists of a dark fermentation reactor (hydolysis/acidogenesis) which allows a partial degradation of organic matter into H2 and simple molecules (volatile fatty acid, sugar, ethanol…). Then the outlet of the first reactor can be used in a second reactor for methane production ending organic matter degradation. However, only high efficiency of the dark fermentation step allows making this two-step process economically viable compared to a simple anaerobic digestion reactor. The aim of this thesis is to improve the knowledge of the dark fermentation process for optimizing hydrogen and metabolites productions. Experiments were achieved to better understanding the main factors limiting hydrogen production along with the operational conditions that could improve hydrogen yield. This thesis also shows the high stability and robustness of effluent recirculation for consecutive hydrogen batch reactor. Finally, several sizes of reactors were performed for a scale-up of the process in order to reach the real operational conditions in industrial scale. This thesis provides new knowledge of the dark fermentation process in mixed culture for creating an industrial two-step process for biohythane production using municipal solid waste.
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https://tel.archives-ouvertes.fr/tel-01841437
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Submitted on : Tuesday, July 17, 2018 - 12:12:05 PM
Last modification on : Thursday, July 2, 2020 - 2:13:44 PM
Long-term archiving on: : Thursday, October 18, 2018 - 1:45:18 PM

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  • HAL Id : tel-01841437, version 1

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Florian Paillet. Optimisation d’un procédé à deux étapes pour la production d’un mélange hydrogène/méthane (biohythane) à partir de la fraction fermentescible des ordures ménagères. Génie des procédés. Montpellier SupAgro, 2017. Français. ⟨NNT : 2017NSAM0027⟩. ⟨tel-01841437⟩

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