process and it can be an example of RS bio-refinery for bio-fuel
production.
4. Conclusions
This work investigated a novel two-step RS pretreatment process to improve its ethanol production economy by co-producing
high value-added products. In the first step pretreatment, AT of
RS removed its hemicellulose and xylose was recovered from the
AT hydrolyzate with 83.2% yield. In the second step pretreatment,
ST of the acid treated RS removed its lignin and the ST hydrolyzate
containing 5.0% lignosulfonate was directly recovered as a cement
water reducer. The SSF of the two-step treated RS had high final
ethanol concentration and yield, which suggests the two-step pretreatment was an efficient pretreatment method for its ethanol
production. This process can be an example of RS bio-refinery for
bio-fuel production.
Acknowledgements
This work was supported by the National Natural Science
Foundation of China (No. 21176196) and the Collaborative
Innovation Center of Catalysis Materials of Hubei Province.