The invention relates to a method for treating a lignocellulosic biomass, with: a. Pretreatment of the biomass by at least one cooking or steam explosion operation, in order to obtain a pretreated substrate, b. Liquid / solid separation on at least part of the pretreated substrate, comprising two successive substeps: - an upstream substep of contacting b1 of the solid / liquid mixture implemented by a continuous mixer (M) using a mixing fluid a downstream extraction / washing sub-step b2 implemented by a continuous filter, using a washing fluid, to obtain a solid phase enriched in solid and a plurality of liquid phases enriched in liquid, with recycling at least partial of a liquid phase extracted from the filter entering the mixer as a mixing fluid.
展开▼
