NOVELTY - A biomass is subjected to chip forming process using a chipper (2), when the biomass is wood. A biomass is subjected to pulping process comprising pulping, selection and deinking processes, when the biomass is recovered used paper. The chip or deinking recovered pulp is processed with chlorine dioxide to obtain a holocellulose. The holocellulose is hydrolyzed with sulfuric acid to obtain monosaccharide of pentose and hexose. The fermentation of 2,3-butanediol is carried out by dehydration using a solid acid catalyst (24) to obtain methyl ethyl ketone as an alternative fuel.    USE - Manufacture of monosaccharide of non-edible lignocellulosic biomass and alternative fuel e.g. methyl ethyl ketone.    ADVANTAGE - The method enables manufacture of monosaccharide of non-edible lignocellulosic biomass and alternative fuel, economically and environmental-friendly. The pentose and hexose are monosaccharidized with simple equipment.    DETAILED DESCRIPTION - A biomass is not crushed, and is subjected to chip forming process using a chipper, when the biomass is wood. A biomass is subjected to pulping process comprising pulping, selection process using a screen cleaner, and deinking process by a floatator, when the biomass is recovered used paper chosen from newspaper, magazine, ledger and corrugated-cardboard. The chip or deinking recovered pulp is processed with chlorine dioxide to obtain a dissolution lignin and holocellulose comprising hemicellulose and cellulose. The dissolution lignin waste liquid is concentrated to total solid of 55% or more, and burned using a boiler, and the energy is recovered. The holocellulose is hydrolyzed with sulfuric acid or microbial enzyme to obtain monosaccharide of pentose and hexose. The 2,3-butanediol, bioethanol and an acetic acid are fermented. The bioethanol and acetic acid are distilled and refined. The fermentation of 2,3-butanediol is carried out by dehydration using a solid acid catalyst to obtain methyl ethyl ketone as an alternative fuel.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of the apparatus for manufacturing monosaccharide of non-edible lignocellulosic biomass.    Chipper (2)    Batch-type chlorine-dioxide process reactor (12)    Mixed-bed ion resin (18)    Sterilization tower (20)    Solid acid catalyst (24)