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Improved enzyme efficiency of rapeseed straw through the two-stage fractionation process using sodium hydroxide and sulfuric acid

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  • Choi, Chang Ho
  • Um, Byung Hwan
  • Kim, Young Soo
  • Oh, Kyeong Keun

Abstract

Two-stage fractionation process using sodium hydroxide and sulfuric acid was conducted to remove lignin and hemicellulose from rapeseed (Brassica napus) straw. This process consists of two stages; using sodium hydroxide, the first stage solubilized 35.54% of lignin and increased the glucan content in the treated solid from 32.86% to 38.13%. The second stage solubilized 85.85% of the lignin and 91.56% of the XMG (Xylan+Mannan+Galactan) into hydrolyzate. After the two-stage process, merely 2.53% of glucan and 3.81% of XMG were lost due to excessive decomposition. Despite the reduction in enzyme loading by 50%, the enzymatic digestibility with the two-stage treated straw was approximately 23% higher than that of the single stage acid fractionation process.

Suggested Citation

  • Choi, Chang Ho & Um, Byung Hwan & Kim, Young Soo & Oh, Kyeong Keun, 2013. "Improved enzyme efficiency of rapeseed straw through the two-stage fractionation process using sodium hydroxide and sulfuric acid," Applied Energy, Elsevier, vol. 102(C), pages 640-646.
  • Handle: RePEc:eee:appene:v:102:y:2013:i:c:p:640-646
    DOI: 10.1016/j.apenergy.2012.08.011
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    1. Chandra, R. & Takeuchi, H. & Hasegawa, T., 2012. "Hydrothermal pretreatment of rice straw biomass: A potential and promising method for enhanced methane production," Applied Energy, Elsevier, vol. 94(C), pages 129-140.
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    1. Chen, Xiaohua & Zhang, YaLei & Gu, Yu & Liu, Zhanguang & Shen, Zheng & Chu, Huaqiang & Zhou, Xuefei, 2014. "Enhancing methane production from rice straw by extrusion pretreatment," Applied Energy, Elsevier, vol. 122(C), pages 34-41.
    2. Jin, Wenxiang & Chen, Ling & Hu, Meng & Sun, Dan & Li, Ao & Li, Ying & Hu, Zhen & Zhou, Shiguang & Tu, Yuanyuan & Xia, Tao & Wang, Yanting & Xie, Guosheng & Li, Yanbin & Bai, Baowei & Peng, Liangcai, 2016. "Tween-80 is effective for enhancing steam-exploded biomass enzymatic saccharification and ethanol production by specifically lessening cellulase absorption with lignin in common reed," Applied Energy, Elsevier, vol. 175(C), pages 82-90.
    3. Ranjan, Amrita & Khanna, Swati & Moholkar, V.S., 2013. "Feasibility of rice straw as alternate substrate for biobutanol production," Applied Energy, Elsevier, vol. 103(C), pages 32-38.
    4. Zhu, Ming-Qiang & Wen, Jia-Long & Wang, Zhi-Wen & Su, Yin-Quan & Wei, Qin & Sun, Run-Cang, 2015. "Structural changes in lignin during integrated process of steam explosion followed by alkaline hydrogen peroxide of Eucommia ulmoides Oliver and its effect on enzymatic hydrolysis," Applied Energy, Elsevier, vol. 158(C), pages 233-242.
    5. Kim, Tae Hoon & Oh, Kyeong Keun & Ryu, Hyun Jin & Lee, Kyong-Hwan & Kim, Tae Hyun, 2014. "Hydrolysis of hemicellulose from barley straw and enhanced enzymatic saccharification of cellulose using acidified zinc chloride," Renewable Energy, Elsevier, vol. 65(C), pages 56-63.
    6. Duque, Aleta & Manzanares, Paloma & Ballesteros, Mercedes, 2017. "Extrusion as a pretreatment for lignocellulosic biomass: Fundamentals and applications," Renewable Energy, Elsevier, vol. 114(PB), pages 1427-1441.
    7. Wang, Zhi-Wen & Zhu, Ming-Qiang & Li, Ming-Fei & Wei, Qin & Sun, Run-Cang, 2019. "Effects of hydrothermal treatment on enhancing enzymatic hydrolysis of rapeseed straw," Renewable Energy, Elsevier, vol. 134(C), pages 446-452.

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