Method for subjecting solid biomass to saccharification pretreatment, apparatus therefor, and method for saccharification of solid biomass

摘要

In the present invention, a solid biomass having a water content of 30 to 95 mass percent is brought into contact with ammonia gas at a pressure of 0.5 to 4 MPa and held at a temperature of 50 to 200°C. The pressure is then rapidly decreased and the solid biomass is blasted. Ammonia gas that is vaporized by the pressure reduction is recovered and reused. Ammonia gas can be brought into contact with the whole of the solid biomass evenly and in a short time. The heat of absorption of the ammonia gas is generated, enabling the minimization of energy consumption required for additional heating.