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Int. J. Mol. Sci. 2012, 13(4), 4141-4152; doi:10.3390/ijms13044141

Comparison of Ultrasonic and CO2 Laser Pretreatment Methods on Enzyme Digestibility of Corn Stover

1,3,* , 1
1 School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China 2 College of Food science and Technology, Henan University of Technology, Zhengzhou 450001, China 3 School of Forestry, Northeast Forestry University, Harbin 150040, China
* Author to whom correspondence should be addressed.
Received: 8 February 2012 / Revised: 12 March 2012 / Accepted: 22 March 2012 / Published: 29 March 2012
(This article belongs to the Section Green Chemistry)
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To decrease the cost of bioethanol production, biomass recalcitrance needs to be overcome so that the conversion of biomass to bioethanol becomes more efficient. CO2 laser irradiation can disrupt the lignocellulosic physical structure and reduce the average size of fiber. Analyses with Fourier transform infrared spectroscopy, specific surface area, and the microstructure of corn stover were used to elucidate the enhancement mechanism of the pretreatment process by CO2 laser irradiation. The present work demonstrated that the CO2 laser had potential to enhance the bioconversion efficiency of lignocellulosic waste to renewable bioethanol. The saccharification rate of the CO2 laser pretreatment was significantly higher than ultrasonic pretreatment, and reached 27.75% which was 1.34-fold of that of ultrasonic pretreatment. The results showed the impact of CO2 laser pretreatment on corn stover to be more effective than ultrasonic pretreatment.
Keywords: pretreatment; CO2 laser; ultrasonic; corn stover; FT-IR pretreatment; CO2 laser; ultrasonic; corn stover; FT-IR
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Tian, S.-Q.; Wang, Z.-Y.; Fan, Z.-L.; Zuo, L.-L. Comparison of Ultrasonic and CO2 Laser Pretreatment Methods on Enzyme Digestibility of Corn Stover. Int. J. Mol. Sci. 2012, 13, 4141-4152.

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