LIGNOCELLULOSIC BIOMASS TREATMENT METHOD
The invention relates to a method for treating a lignocellulosic biomass comprising a solids content of at most 80% by weight, said method comprising the use of at least one reactor (9, 14) for treating said biomass, wherein, or the at least one of said reactors is supplied with biomass by a supply means (6, 11) creating an increase in pressure between the biomass inlet and the biomass outlet of said supply means, wherein said supply means is washed by circulation of a washing fluid between a washing inlet (7, 12) and a washing outlet (8, 13). According to the method, at least one portion of the washing fluid (8, 13) exiting from the fluid outlet of the or of at least one of the supply means (6, 11) is reintroduced into the washing inlet of the same supply means or of another of said supply means.