NOVELTY - Resource circulation, comprising grinding biomass e.g. woody and herbage type biomass and organic refuse; carrying out sulfuric acid saccharification of biomass to obtain saccharified liquid used for fuel cell electric power generation; neutralizing the saccharified liquid; utilizing the saccharified liquid for producing various substances such as organic acids and bioactive substances; and utilizing the biomass residue containing gypsum generated by the solid-liquid separation, as e.g. composting raw material and gypsum materials for construction, is new.    USE - The method is useful for circulation of resource and utilization of the saccharified liquid for fuel cell electric power generation by e.g. glucose fuel cell and for producing various organic acids, ethanol, bioactive substances, such as nucleic acids, an amino acid and an inosine, antibiotics, bioactive protein and peptide, an industrial enzyme, single cell protein (SCP), probiotics agent and raw food fertilizer; the biomass residue containing gypsum as soil improvement material for salt accumulation soil and alkali soil, contaminated water suppression material, fine erosion suppression material, composting raw material, and gypsum materials for construction; the residue produced after carrying out isolation extraction of each valuables, or a fermented liquor, for manufacturing fertilizer, soil improvement material, probiotics agent, and microorganisms protein (SCP); and the acidic biomass residue as an alkali soil improvement agent or a neutralizing agent of an alkali waste material (all claimed).    DETAILED DESCRIPTION - Resource circulation, involves grinding biological biomass chosen from woody and herbage type biomass, such as a rice straw and mowed grass, excrement type biomass, such as an activated sludge, food industry waste material, used paper and organic refuse as required; carrying out sulfuric acid saccharification of grinded biomass to obtain saccharified liquid which contains monosaccharides, such as glucose, xylose, etc., in large quantities, where the liquid is used for fuel cell electric power generation by e.g. glucose fuel cell; neutralizing the saccharified liquid with calcium oxide (or calcium carbonate); utilizing the saccharified liquid for producing various organic acids, ethanol, bioactive substances, such as nucleic acids, an amino acid and an inosine, antibiotics, bioactive protein and peptide, an industrial enzyme, single cell protein (SCP), probiotics agent and raw food fertilizer, which production method involves inoculating organic acid such as lactic acid and succinic acid producing microbe, organic acid and ethanol producing yeast, amino acid-fermentation microbe, nucleotide such as inosine fermentation microbes, single cell protein (SCP) related microbe, bioactive-substances such as antibiotics producing microbe, bioactive protein and peptide producing microbe, industrial enzyme producing microbe, or plant growth promotion microorganisms (plant growth promoting rhizobacteria (PGPR), mycorrhiza fungi or nitrogen-fixation microbe), in the saccharified liquid, and culturing the microbes to produce the substance; and utilizing the biomass residue containing gypsum generated by the solid-liquid separation after neutralization, as either the soil improvement material for salt accumulation soil and alkali soil, contaminated water suppression material, fine erosion suppression material, composting raw material, gypsum materials for construction, etc.    INDEPENDENT CLAIMS are also included for:    (1) utilizing the residue produced after carrying out isolation extraction of each valuables, or a fermented liquor, for manufacturing fertilizer, soil improvement material, probiotics agent, microorganisms protein (SCP) etc., after valuables fermentation of the liquid portion after a solid-liquid separation; and    (2) suppressing carbon dioxide emission by performing the above method.