(501g) Integrated Technology for Liquid Biofuels and Bioproducts from Lignocellulose

Zhang, J. - Presenter, Tsinghua University

With lignocellulose as a raw material, based on separation of components and total utilization of lignocellulose biomass, the pretreatment of lignocellulose was studied. After pretreatment, cellullase production by a novel solid state fermentation process was investigated. Then, cellulose was hydrolyzed by cellulase to get hydrolysate which was used to produce bioethanol by simultaneous saccharification and fermentation. In order to reduce the inhibition of bioethanol on fermentation, CO2 gas stripping method was adopted and discussed. In addition, hemicellulose was used to produce bioethanol, 2,3-butanediol and xylitol, respectively. As to lignin, it was used to produce lignin derived products. Furthermore, on the one hand, bioethanol can be used as biofuel; on the other hand, bioethanol can be used to produce bioethylene by catalytic dehydration which was also studied in our research work. As we know, ethylene is a basic raw material to be used to produce more than 70% chemicals in chemical industry. In addition, biolipid production by fermentation to be used as raw material to produce biodiesel was also investigated, and biodiesel production by chemical transesterification with solid catalyst and supercritical fluid technology respectively were discussed too. Moreover, biobutanol production by fermentation was studied in our research. Therefore, an integrated technology route of bioenergy and biorefinery from lignocellulose were presented by our studies.