NOVELTY - A method for improving a bioconversion process, comprising combining a biomass with an acid to provide a biomass slurry and liberate a saccharide component, precipitating the saccharide components, removing the acid from the precipitated saccharide component, redissolving the water-soluble precipitated saccharide component to provide saccharide solution, and adding a hydrolyzing enzyme and a dilute acid. An organic solvent is added to the biomass slurry to precipitate the saccharide components.    USE - Used to produce fuels, chemicals and isolating saccharide components.    ADVANTAGE - The method has high saccharide yields, greater efficiency and fast hydrolysis rates. The method: reduces/avoids formation of inhibitor molecules; produces high value by-products such as high quality lignin and hemicellulose; and decreases energy and equipment costs.    DETAILED DESCRIPTION - A method for improving a bioconversion process, comprises combining a biomass with an acid to provide a biomass slurry and liberate a saccharide component, precipitating the saccharide components, removing the acid from the precipitated saccharide component, redissolving the water-soluble precipitated saccharide component to provide saccharide solution, and adding a hydrolyzing enzyme and a dilute acid. An organic solvent is added to the biomass slurry to precipitate the saccharide components. The hydrolyzing enzyme having cellulase is added to the saccharide dispersion to hydrolyze a cellulose component. The saccharide is fermented in a sugar-to-ethanol converting microorganism under suitable conditions for producing ethanol. The ethanol is extracted from the reaction mixture. The biomass is hardwood, softwood, herbaceous plants, grasses, and agricultural residues. The organic solvent is present in a 2-100 fold volumetric excess to the biomass slurry volume.    INDEPENDENT CLAIMS are included for:    (1) a method for optimizing a pretreatment protocol for hydrolysis of lignocellulosic material; and    (2) a cellulose saccharification process.    DESCRIPTION OF DRAWING(S) - The diagram shows a process equipment that incorporates saccharide precipitation in a lignocellulose conversion process:    Acid holding tank; (108)    Precipitation tank; (110)    Organic solvent tank; (114)    Evaporator; (118)    Hydrolysis reactor. (132)