Method for treating biomass and device for treating biomass

A method for treating biomass, the method comprising:

• feeding the biomass (1) and an amount of water (2) as an impregnation liquid into a first reactor unit (10) such that the biomass (1) is impregnated using the amount of water (2) as the impregnation liquid while the biomass (1) is transferred through the first reactor unit (10) by a conveyor means (11, S10);
• transferring the impregnated biomass (22) from the first reactor unit (10) to a separation unit (20) in which at least a part (21) of the amount of water (2) used for impregnation can be separated from the impregnated biomass (22, S20);
• transferring the impregnated biomass (22) from the separation unit (20) into a second reactor unit (30) in which the impregnated biomass (22) is subjected to a predetermined pressure (S30) and hydrolysis of the impregnated biomass takes place in the second reactor unit;
• wherein the impregnation of the biomass (1) in the first reactor unit (10) is carried out exclusively using the amount of water (2) fed into the first reactor unit (10).