METHOD FOR PRETREATING LIGNOCELLULOSIC BIOMASS WITH A HYDRATED INORGANIC SALT TO OBTAIN A CELLULOSIC FRACTION AND A HEMICELLULOSIC FRACTION

摘要

The present invention describes a method for pretreating lignocellulosic biomass comprising: a) a step of acid hydrolysis of the biomass with an acid solution resulting in a liquid fraction and a solid fraction, b) a step of separating the solid fraction and the liquid fraction, c) a step of drying the solid fraction, d) a step of firing the dried solid fraction in a medium comprising at least one hydrated inorganic salt 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 treating 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 wherein at least a portion of the liquid fraction obtained in step b) is used to grow microorganisms which produce the enzymes necessary for the enzymatic hydrolysis of step g).