PROCESS FOR THE PRODUCTION OF OXYGEN COMPOUNDS AND / OR ALKENES, HYDROGEN AND METHANE FROM LIGNOCELLULOSIC BIOMASS

摘要

The present invention describes a method for producing oxygenated compounds and / or alkenes, hydrogen and methane from lignocellulosic biomass comprising a step of pretreatment of the lignocellulosic biomass making it possible to obtain a pretreated substrate, then a step of enzymatic hydrolysis making it possible to obtain an effluent containing sugars, then a fermentation step in the presence of a microorganism making it possible to obtain an effluent containing an oxygenated compound and / or an alkene, and then a step of separation of the effluent allowing to obtain an oxygenated compound and / or an alkene, and a residue, said residue being subjected to anaerobic digestion in two steps: acidification in the presence of acidogenic microorganisms in a first reactor to produce a effluent containing hydrogen and of carbon dioxide, then methanogenesis in the presence of methanogenic microorganisms in a second actor to produce an effluent containing methane and carbon dioxide.