A PROCESSING METHOD FOR FRACTIONALLY CONVERTING PENNISETUM HYDRIDIUM INTO FUEL ETHANOL WITH CO-PRODUCTION OF ELECTRICITY GENERATION AND PAPER PULP

摘要

THE INVENTION RELATES TO A METHOD FOR FRACTIONALLY CONVERTING PENNISETUM HYDRIDUM INTO FUEL ETHANOL WITH CO-PRODUCTION OF ELECTRICITY GENERATION AND PAPER PULP, WHICH COMPRISES SUBJECTING THE PENNISETUM HYDRIDUM HAVING BEEN CUT INTO SEGMENTS TO STEAM EXPLOSION TREATMENT BY UTILIZING A STEAM EXPLOSION DEVICE TO OBTAIN A STEAM EXPLOSION PRODUCT, AND SAID METHOD IS CHARACTERIZED IN THAT IT COMPRISES THE STEPS OF: WASHING THE STEAM EXPLOSION PRODUCT WITH WATER TO OBTAIN FIBERS AND WATER WASHING LIQUID CONTAINING A DEGRADED HEMICELLULOSE, AND SEPARATING AND PURIFYING THE WATER WASHING LIQUID TO OBTAIN AN XYLO-OLIGOSACCHARIDE; FRACTIONALLY TEASING THE FIBERS, AND SUBJECTING THE OBTAINED LONG FIBERS TO AN ETHANOL SELF-CATALYZED PULPING AND THEN A BLEACHING TREATMENT TO OBTAIN A PAPER PULP, AND AFTER RECOVERING ETHANOL, OBTAINING AN ALCOHOL-SOLUBLE LIGNIN BY SEPARATION; PREPARING CELLULASE BY A SOLID STATE FERMENTATION, THAT IS, TAKING THE SHORT FIBERS OBTAINED BY FRACTIONALLY TEASING AS A FERMENTATION SUBSTRATE OF TRICHODERMA VIRIDE TO PREPARE A SOLID CELLULASE; MIXING THE SHORT FIBERS, THE SOLID CELLULASE AND YEAST TO PERFORM A SIMULTANEOUS SACCHARIFICATION FERMENTATION FOR OBTAINING THE FUEL ETHANOL AND A FERMENTATION RESIDUE, AND PRODUCING CO2 BY THE FERMENTATION; AND DRYING THE FERMENTATION RESIDUE TO PREPARE A BIOMASS FUEL FOR ELECTRICITY GENERATION. THE METHOD OF THE INVENTION CAN REALIZE A HIGH EFFICIENT COMPREHENSIVE UTILIZATION OF THE PENNISETUM HYDRIDUM RESOURCE.