| 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. |
