NOVELTY - Method for converting lignocellulosic biomass to bioproducts involves performing first hydrolyzing cycle of lignocellulosic biomass containing an easily digestible portion and non-easily digestible portion, to produce slurry containing digested solids and unhydrolyzed solids, respectively, and producing solids residue and liquid coproduct from the slurry.    USE - The method is useful for converting lignocellulosic biomass to bioproducts (claimed), used for producing biofuels (e.g. bio alcohols such as ethanol and butanol), chemical intermediates for biosynthesis of bioproducts (e.g. organic acids, fatty acids, alkanes, terpenoids etc.).    ADVANTAGE - The method is cost-effective as it reduces utilization of biocatalyst resources by recycling of yeast cells and enzymes.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) system comprising first vessel for performing first hydrolyzing cycle of lignocellulosic biomass containing an easily digestible portion and a non-easily digestible portion to produce slurry containing digested solids and unhydrolyzed solids, respectively, and second vessel for producing solids residue and liquid coproduct from the slurry, and bioproduct production facility connected to the integrated hydrolysis system and configured to perform either separate hydrolysis and fermentation (SHF) or simultaneous saccharification and co-fermentation (SSCF); and    (2) apparatus comprising integrated hydrolysis equipment configured to perform first hydrolyzing cycle of lignocellulosic biomass containing an easily digestible portion and non-easily digestible portion to produce slurry containing digested solids and unhydrolyzed solids, respectively, where the equipment is further configured to perform production step, in which solids residue and liquid coproduct are produced from the slurry, and recycling step, in which the solids are recycled through second hydrolyzing cycle, and an amount of the undigested solids in the solids residue is converted to digested solids.