Journal
BIORESOURCE TECHNOLOGY
Volume 231, Issue -, Pages 101-108Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.01.039
Keywords
Napier grass; Pennisetum purpureum; Alkali-pretreatment; Enzymatic hydrolysis; Semi-simultaneous saccharification fermentation (sSSF); Butanol fermentation
Funding
- Aph Co. Ltd.
- Ministry of Science and Technology Taiwan [MOST-103-2221-E-005-072-MY3, MOST-104-2621-M-005-004-MY3]
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Napier grass is a potential feedstock for biofuel production because of its strong adaptability and wide availability. Compositional analysis has been done on Napier grass which was collected from a local area of Taiwan. By comparing acid-and alkali-pretreatment, it was found that the alkali-pretreatment process is favorable for Napier grass. An overall glucose yield of 0.82 g/g-glucose(total) can be obtained with the combination of alkali-pretreatment (2.5 wt% NaOH, 8 wt% sample loading, 121 degrees C, and a reaction time of 40 min) and enzymatic hydrolysis (40 FPU/g-substrate). Semi-simultaneous saccharification fermentation (sSSF) was carried out, where enzymatic hydrolysis and ABE fermentation were operated in the same batch. It was found that after 24-h hydrolysis, followed by 96-h fermentation, the butanol and acetone concentrations reached 9.45 and 4.85 g/L, respectively. The butanol yield reached 0.22 g/g-sugar(glucose+xylose). Finally, the efficiency of butanol production from Napier grass was calculated at 31%. (C) 2017 Elsevier Ltd. All rights reserved.
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