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Pretreatment of Corn Stover Silage with Fe(NO3)3 for Fermentable Sugar Production

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Abstract

Corn stover silage is an attractive raw material for the production of biofuels and chemicals due to its high content of carbohydrates and easy degradability. The effects of Fe(NO3)3 pretreatment conditions on sugar yields were investigated for corn stover silage. In addition, a combined severity factor was used to evaluate the effect of pretreatment conditions on the concentration of total sugars and inhibitors. Optimum pretreatment condition was obtained at 150 °C for 10 min with 0.05 M Fe(NO3)3, at which the yields of soluble xylose and glucose in liquid achieved 91.80% of initial xylose, 96.74% of initial arabinose and 19.09% of initial glucose, respectively, meanwhile, 91.84% of initial xylose, 98.24% of initial arabinose, and 19.91% of initial glucose were removed. In addition, a severity analysis showed that the maximum sugar concentration of 33.48 g/l was achieved at combined severity parameter value of 0.62, while the inhibitor concentration was only 0.03 g/l. Fe(NO3)3 is an effective catalyst to enhance hemicellulose hydrolysis in corn stover silage, the yields of monomeric xylose in the liquid fraction reached as high as 91.06% of initial xylose and 96.22% of initial arabinose, respectively.

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Acknowledgments

The authors acknowledge the financial support from the National Key Technology R&D Program (NO. 2007BAD75B07). This work was also supported by the Seed Foundation of Tianjin University (NO. 60302006). The authors gratefully acknowledge Prof. Yimin Zhang for providing HPLC and Dr. Xiaoyan Yu, Suli Zhi, and Xudong Gong for help in reviewing this paper. The authors also thank postgraduate researchers Gang Han, Han Wang, Guofu Li, and Bo Xi for their assistance in preparing corn stover silage samples.

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  1. School of Environment Science and Technology, Tianjin University, Tianjin, 300072, China

    Youshan Sun, Xuebin Lu, Rui Zhang, Xinying Wang & Shuting Zhang

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  1. Youshan Sun
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  2. Xuebin Lu
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  3. Rui Zhang
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  4. Xinying Wang
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Correspondence to Shuting Zhang.

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Sun, Y., Lu, X., Zhang, R. et al. Pretreatment of Corn Stover Silage with Fe(NO3)3 for Fermentable Sugar Production. Appl Biochem Biotechnol 164, 918–928 (2011). https://doi.org/10.1007/s12010-011-9184-4

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  • DOI: https://doi.org/10.1007/s12010-011-9184-4

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