IN SITU PRODUCTION OF FURFURAL IN A CONTROLLED AMOUNT IN AN ALCOHOL PRODUCTION UNIT FROM A LIGNOCELLULOSIC BIOMASS

摘要

The present invention relates to a method for producing so-called second-generation alcohol from a lignocellulosic substrate, comprising the in-situ production of furfural in a controlled amount, and including at least the following steps: a first step of chemically pretreating the substrate with alkaline; a step of adjusting the pH of the pretreated substrate; a step of enzymatically hydrolyzing the pretreated substrate; a step of alcoholically fermenting the hydrolysate obtained by a alcohol-producing microorganism; a separation/purification step; a step of the acid conversion of at least one liquid fraction into furfural, said liquid fraction being obtained during one of the preceding steps; and a step of mixing said resulting furfural with the pretreated substrate during the pH adjustment step.