Method for enzymatic saccharification treatment of lignocellulose-containing biomass, and method for producing ethanol from lignocellulose-containing biomass

A method for the enzymatic saccharification treatment of a lignocellulose-based raw material, comprising:

• adding a lignocellulose-based raw material which has been subjected to a pretreatment for making the raw material appropriate for an enzymatic saccharification reaction, and an electrolyte containing a water-soluble salt, to water containing a cellulose saccharification enzyme;
• subjecting the lignocellulose-based raw material as a raw material suspension whose electrical conductivity has been adjusted to 5 mS/cm to 25 mS/cm, to an enzymatic saccharification treatment through an enzymatic saccharification reaction;
• separating and recovering the reaction product and an enzyme-containing solution from the treated suspension after the enzymatic saccharification treatment;
• and
• recycling the recovered enzyme-containing solution as an enzyme for the enzymatic saccharification treatment process.