Maîtrise de la gestion des fumiers de bovin avant méthanisation : un enjeu clé pour optimiser la production de biogaz

Abstract : This work focuses on the optimization of cattle manure management practices before anaerobic digestion. Different storage conditions were studied for 120 days at the laboratory scale, notably open-air storage and ensiling (and co-ensiling), with the aim of improving the conservation of the biochemical methane potential. These experiments have highlighted the very poor preservation of fresh cattle manure. On the one hand, about 74% of the biochemical methane potential was lost during aerobic storage. On the other hand, chemical properties of fresh cattle manure restricted silage stabilization, resulting in 46% loss of biochemical methane potential. Co-ensiling trials showed that preservation of cattle manure can be achieved if proper storage practices are used. For co-silages with wheat straw the energy losses varied between 5-67%. With the addition of glucose or starch the energy losses were negligible after 120 days. Co-ensilage of cattle manure with a co-substrate rich in accessible sugars and high dry matter content seems to be the most appropriate method for preserving the energy potential of this resource before anaerobic digestion.
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Submitted on : Monday, January 7, 2019 - 9:01:46 AM
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Ruben Teixeira Franco, Pierre Buffière, Rémy Bayard. Maîtrise de la gestion des fumiers de bovin avant méthanisation : un enjeu clé pour optimiser la production de biogaz. Déchets, Sciences et Techniques, 2018, ⟨10.4267/dechets-sciences-techniques.3862⟩. ⟨hal-01971381⟩

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