NOVELTY - Enzyme mixing-biomass refining apparatus comprises: an extruder comprising a cylindrical housing and a rotatable screw mounted in the housing, where one side of the housing is connected to a feedstock feeding unit, and an outlet is connected to a biomass inlet of a refiner; and a refiner comprising a stator disc having a cooling water unit, at least one enzyme feeding hole, and a biomass inlet, and a refining disc which is provided so as to form a gap with the inner surface of the stator disc and to have a refining region opposite to that of the stator disc.    USE - The enzyme mixing-biomass refining apparatus is useful for simultaneously performing biomass refining and enzyme mixing (claimed) for producing cellulosic sugar and bioethanol.    ADVANTAGE - The enzyme mixing-biomass refining apparatus: utilizes less energy; exhibits high saccharification efficiency; and performs biomass refining and enzyme mixing shortens, thus shortening pretreatment procedures, while increasing the efficiency with which the enzyme is mixed.    DETAILED DESCRIPTION - Enzyme mixing-biomass refining apparatus comprises: an extruder comprising a cylindrical housing and a rotatable screw mounted in the housing, where one side of the housing is connected to a feedstock feeding unit, and an outlet provided at the other side of the housing is connected to a biomass inlet of a refiner; and a refiner comprising a stator disc having a cooling water unit formed on its outer peripheral surface, at least one enzyme feeding hole is provided in a refining region, and a biomass inlet provided at the central portion, and a refining disc which is provided so as to form a gap with the inner surface of the stator disc and to have a refining region opposite to that of the stator disc and is rotated by a separate motor. An INDEPENDENT CLAIM is also included for simultaneously performing biomass refining and enzyme mixing using the enzyme mixing-biomass refining apparatus, comprising (a) horizontally transferring biomass by rotation of an extruder screw into a gap, formed between a stator disc of a refiner and a refining disc disposed opposite to it, through a biomass feeding opening provided at a center of the stator disc, (b) maintaining an internal temperature of the gap, formed between the stator disc and the refining disc disposed opposite, at 40-80 degrees C by circulating cooling water to a cooling water space, provided on the outer peripheral surface of the stator disc, and (c) saccharifying the biomass by feeding an enzyme into at least one hole provided in the refining region adjacent to a circumference of the stator disc, and rotating the refining disc to refine the biomass while mixing the biomass with the enzyme.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the enzyme mixing biomass refining apparatus