NOVELTY - The facility (10) has screw press (16) and three-phase centrifuge (18) which separate saccharified liquid and residue from mixture produced by saccharification apparatus (14). A fermentation apparatus (20) ferments the separated saccharified liquid to produce fermented liquor. An enzyme-reaction processing apparatus (30) performs enzyme-reaction treatment process to produce enzyme-reaction thing containing enzyme-reaction liquid. The enzyme-reaction liquid separated from enzyme-reaction thing by screw press (32) is sent to saccharification apparatus.    USE - Ethanol production facility for manufacturing ethanol for fermenting foodstuff waste material e.g. biomass feedstock discharged from convenience store and restaurant, and organic refuse discharged from foodstuff factory, home, hospital, and agricultural field.    ADVANTAGE - The enzyme-reaction processing apparatus performs enzyme-reaction treatment process to produce enzyme-reaction thing containing enzyme-reaction liquid, such that the yield of ethanol can be improved to reduce the cost of cellulose, and the surface area of residue can be enlarged. Hence the enzyme reactivity in enzyme-reaction processing apparatus can be improved, and the weight reduction of residue can be achieved.    DETAILED DESCRIPTION - The saccharification apparatus is configured to produce the mixture containing saccharified liquid and residue. A distillation apparatus (22) is configured to distill the fermented liquor. A polymeric degradation enzyme is added to the residue separated by screw press and three-phase centrifuge to perform enzyme-reaction process. A pulverization device is configured to pulverize the residue between screw press and three-phase centrifuge and enzyme-reaction processing apparatus. A heat processing apparatus is configured to heat the pulverized residue. The heated residue is sent to enzyme-reaction processing apparatus as to-be-processed object. The distillation waste liquid discharged from distillation apparatus is sent to the enzyme-reaction processing apparatus and saccharification apparatus as addition water. An anaerobic processing apparatus (34) is configured to anaerobically process the distillation waste liquid to generate combustible gas. The combustible gas is utilized as heat source of ethanol production facility. A drying apparatus is configured to dry the residue separated from enzyme-reaction thing. A shaping apparatus is configured to mold the dried material to produce biomass solid fuel. The polymeric degradation enzymes are comprised with protease, cellulase, hemicellulase, lipase, pectinase, nuclease, and cell-wall degradation enzyme. The addition density of cellulase in enzyme-reaction processing apparatus is 0.1-0.5 wt% with respect to the quantity of the to-be-processed object. The to-be-processed object is stirred at the temperature of 45-60 degrees C for 12 hours at enzyme-reaction treatment process. The to-be-processed object is stirred for 24 hours in enzyme-reaction treatment process. An INDEPENDENT CLAIM is included for a weight reduction method of residue.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of the ethanol production facility.(Drawing includes non-English language text)    Ethanol production facility (10)    Saccharification apparatus (14)    Screw presses (16,32)    Three-phase centrifuge (18)    Fermentation apparatus (20)    Distillation apparatus (22)    Enzyme-reaction processing apparatus (30)    Anaerobic processing apparatus (34)