METHOD FOR PRETREATING PLANT STARTING MATERIAL FOR THE PRODUCTION， FROM SACCHARIFEROUS AND LIGNOCELLULOSIC RESOURCES， OF BIOETHANOL AND/OR OF SUGAR

The invention proposes a method for pretreating plant starting material for the purpose of producing bioethanol and/or sugar by means of a common chamber (12)， characterized in that: -during one period， the plant material (MP)， introduced into the common pretreatment chamber， is a lignocellulosic plant starting material， the pretreatment of which is aimed at separating the cellulose， the hemicelluloses and the lignins so as to obtain a pretreated plant material that canbe hydrolysed and fermented for the production of bioethanol; -during another period， the plant material (MP)， introduced into the common pretreatment chamber， is a sacchariferous plant starting material， the pretreatment of which is aimed at extracting therefrom， by diffusion， a sugar juice for the production of sugar and/or of bioethanol. The invention proposes a method for pretreating plant starting material for the purpose of producing bioethanol and/or sugar by means of a common chamber (12)， characterized in that: -during one period， the plant material (MP)， introduced into the common pretreatment chamber， is a lignocellulosic plant starting material， the pretreatment of which is aimed at separating the cellulose， the hemicelluloses and the lignins so as to obtain a pretreated plant material that canbe hydrolysed and fermented for the production of bioethanol; -during another period， the plant material (MP)， introduced into the common pretreatment chamber， is a sacchariferous plant starting material， the pretreatment of which is aimed at extracting therefrom， by diffusion， a sugar juice for the production of sugar and/or of bioethanol.