PROCESS FOR THE PRETREATMENT OF LIGNOCELLULOSIC BIOMASS WITH A HYDRATE INORGANIC SALT FOR OBTAINING A CELLULOSIC FRACTION AND A HEMICELLULOSIC FRACTION

摘要

The present invention describes a lignocellulosic biomass pretreatment process comprising: a) a step of acid hydrolysis of the biomass by an acid solution leading to a liquid fraction and a solid fraction, b) a step of separation of the solid fraction and of the liquid fraction, c) a step of drying the solid fraction, d) a step of cooking the dried solid fraction in a medium comprising at least one hydrated inorganic salt making it possible to obtain a solid fraction and a liquid fraction, e ) a step of separating the solid fraction and the liquid fraction obtained in step d) f) optionally a step of treatment of said solid fraction obtained in step e), g) a step of enzymatic hydrolysis of said solid fraction obtained in step e) and / or f), and in which at least a portion of the liquid fraction obtained in step b) is used for the growth of the microorganism producing the enzymes my requirements for enzymatic hydrolysis of step g).