期刊
BIORESOURCE TECHNOLOGY
卷 330, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.124969
关键词
Self-cycling fermentation; Sequential sugar utilization; Cellulosic ethanol; Cellulose nanocrystals; Biorefinery
资金
- Future Energy Systems at the University of Alberta, Edmonton, AB, Canada [T01-P01]
- BioFuelNet Canada (NCEBFN 3N)
- Natural Sciences and Engineering Research Council of Canada (Discovery Grants, NSERC) [RGPIN-2019-04184]
- InnoTech Alberta
The study successfully integrated self-cycling fermentation with cellulose nanocrystals production, achieving stable ethanol production and increased productivity. This co-production strategy has the potential to produce both cellulosic ethanol and cellulose nanocrystals from a single feedstock.
A promising approach to help offset production costs for the cellulosic ethanol industry is to improve ethanol productivity while simultaneously generating value-added by-products. This study reports integration of an advanced fermentation approach (self-cycling fermentation) with the production of cellulose nanocrystals. Specifically, wood pulp was enzymatically hydrolyzed to yield dissolved sugars, which were fed to a self-cycling fermentation system for ethanol production, and residual solids were used for cellulose nanocrystals production via acid hydrolysis. Self-cycling fermentation achieved stable ethanol production for 10 cycles with significantly greater productivity than batch operation: ethanol volumetric productivity increased by 63?95% and annual ethanol productivity by 96 ? 5%. Additionally, the enzyme hydrolysis approach employed did not impede ethanol fermentation, and the cellulose nanocrystals generated displayed properties consistent with previous studies. Taken together, these results highlight the potential of this co-production strategy to produce both cellulosic ethanol and cellulose nanocrystals from a single feedstock.
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