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Conversion of Sweet Sorghum Straw to Sugars by Dilute Acid Saccharification

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Abstract

This study was focused on hydrolysis of sweet sorghum straw using dilute acid pretreatment. The biomass loading was 10 % w/v and the pretreatment parameters, concentration of sulfuric acid (0–3 % v/v), temperatures (120–190 °C) and residence times (10–30 min) were investigated. The monomeric sugars (glucose, xylose, galactose, arabinose, mannose) in hydrolyzate were analyzed using high performance liquid chromatography. The maximum yield of glucose and xylose from sweet sorghum straw was 0.234 g glucose/g dry substrate and 0.208 g xylose/g dry substrate, respectively, at the pretreatment condition: 120 °C, 3 % H2SO4 for 10 min. In this case, a total of 50.04 % of glucan and 76.41 % of xylan were converted to glucose and xylose, respectively.

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Acknowledgments

This research was financially supported by the Government of Thailand, the Graduate School Research Fund, the Ratchadaphiseksomphot Endowment Fund (RD_40_53_61), the Higher Education Research Promotion and National Research University Project of Thailand, Office of the Higher Education Commission (EN1191B-55), Chulalongkorn University.

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Authors and Affiliations

  1. Program in Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand

    Aphisit Poonsrisawat & Sukanya Phuengjayaem

  2. Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand

    Amorn Petsom

  3. Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok, 10330, Thailand

    Siriluk Teeradakorn

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  1. Aphisit Poonsrisawat
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  2. Sukanya Phuengjayaem
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  3. Amorn Petsom
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  4. Siriluk Teeradakorn
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Correspondence to Siriluk Teeradakorn.

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Poonsrisawat, A., Phuengjayaem, S., Petsom, A. et al. Conversion of Sweet Sorghum Straw to Sugars by Dilute Acid Saccharification. Sugar Tech 15, 322–327 (2013). https://doi.org/10.1007/s12355-013-0235-8

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  • DOI: https://doi.org/10.1007/s12355-013-0235-8

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