Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7711514 | International Journal of Hydrogen Energy | 2016 | 8 Pages |
Abstract
The major hurdle to produce bioenergy from rice straw is the low yield of fermentable sugars. This study was carried out to evaluate the effect of pretreatment conditions (rice straw concentration, particle size, hydrolysis time, acid concentration, FeCl3 and enzyme additions) that can yield the maximum sugar monomers for simultaneous production of hydrogen and ethanol by mixed culture fermentation. The results of the evaluation showed that 0.8-1.0Â M hydrochloric acid could give the maximum total sugar yield of 52.9%, 2.8Â g/L glucose, 14.5Â g/L xylose, and 38.6Â g/L total reducing sugar from 100Â g/L rice straw with particle size 0.15Â mm, hydrolysis time 20Â min. FeCl3 addition did not enhance the sugar yield but enzymatic hydrolysis increased the reducing sugar yield to 49.8Â g/L. High volumetric hydrogen production of 771Â mL/L and ethanol production of 1776Â mg COD/L was obtained from the pretreated rice straw hydrolyzate. And the total energy from simultaneous hydrogen and ethanol production was highest at 355Â J/g polysaccharides.
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Authors
Biswarup Sen, Yen-Ping Chou, Shu-Yii Wu, Chun-Min Liu,