A PROCESS OF JOINT PRODUCTION OF FUEL ETHANOL, ELECTRICITY AND PAPER PULP BY CLASSIFICATION CONVERSION OF PENNISETUM PURPUREUM SCHUM

摘要

A process of joint production of fuel ethanol, electricity and paper pulp by fractionation conversion of Pennisetum purpureum Schum, which includes steam blasting the Pennisetum purpureum Schum segments with a steam blasting device, obtaining fibres and an aqueous solution containing degraded hemicellulose by washing the steam-blasted product with water; obtaining oligoxylose by separating and purifying the washing solution; fractionating the fibres; using the longer fibers so obtained for auto-catalyzed ethanol pulping, then bleaching the pulp so obtained to obtain a paper pulp; recovering and separating the ethanol to obtain alcohol-soluble lignin; preparing cellulase by solid fermentation; obtaining ethanol and fermentation residue by simultaneous saccharification and fermentation of the mixture of the shorter fibres, solid cellulase and yeast, said fermentation producing also CO2; drying the fermentation residue for use as a biofuel for electricity generation.