Co-production of bioethanol and biodiesel from corn stover pretreated with nitric acid

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This research explores the application of glucose and xylose from corn stover pretreated with nitric acid (HNO3) for the co-production of bioethanol and biodiesel. Response surface methodology was employed to optimize HNO3 pretreatment condition including HNO3 concentration (0.2-1.0%), temperature (140-160 degrees C), and reaction time (1-10 min). The optimal reaction condition was 151.9 degrees C, 0.68% HNO3 and 2.5 min, which resulted in the highest xylose yield of 77.8% and glucan content of 57.1%. Quasi-simultaneous saccharification and fermentation (Q-SSF) of pretreated corn stover with Saccharomyces cerevisiae gave an ethanol concentration of 22.4 g/L, corresponding to 69.1% theoretical ethanol yield based on initial cellulose weight. In addition, Cryptococcus curvatus in hydrolysate medium showed the lipid yield (final cell weight x lipid content) of 1.04 g/L, which was higher than those in defined medium using pure xylose. Our work demonstrates that the simultaneous production of ethanol and lipid can be one potentially promising option for lignocellulose-derived fuel production.
Publisher
ELSEVIER SCI LTD
Issue Date
2015-03
Language
English
Article Type
Article
Keywords

ETHANOL-PRODUCTION; SSF; FERMENTATION; OPTIMIZATION; HYDROLYSIS; STRAW

Citation

FUEL, v.143, pp.285 - 289

ISSN
0016-2361
DOI
10.1016/j.fuel.2014.11.031
URI
http://hdl.handle.net/10203/195315
Appears in Collection
CE-Journal Papers(저널논문)
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