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An irradiation-alkaline pretreatment of kenaf core for improving the sugar yield

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  • Jeun, Joon-Pyo
  • Lee, Byoung-Min
  • Lee, Jin-Young
  • Kang, Phil-Hyun
  • Park, Jung-Ki

Abstract

Kenaf (Hibiscus cannabinus) has received considerable attention as a renewable resource because of its fast growth and low lignin content. In the present study, a combination pretreatment of kenaf core using electron beam irradiation (EBI) and dilute alkali was investigated to improve the sugar yield in enzymatic hydrolysis. In the first step, EBI of the kenaf core was performed at various doses ranging from 100 to 500 kGy. The electron beam-irradiated kenaf core was then autoclaved with 3% dilute alkali at 120 °C for 5 h. The pretreated kenaf core was finally subjected to enzymatic hydrolysis at 50 °C for 24, 48, and 72 h by Celluclast 1.5 L (70 FPU/mL) and Novozyme-188 (40 CbU/mL). A total sugar yield of 72.4% was obtained with a 63.9% yield of glucose from pretreated kenaf core after 72 h of enzymatic hydrolysis. To further analyze effectiveness of EBI pretreatment, characterizations of kenaf core by a two-step process of EBI-alkaline pretreatment were also investigated.

Suggested Citation

  • Jeun, Joon-Pyo & Lee, Byoung-Min & Lee, Jin-Young & Kang, Phil-Hyun & Park, Jung-Ki, 2015. "An irradiation-alkaline pretreatment of kenaf core for improving the sugar yield," Renewable Energy, Elsevier, vol. 79(C), pages 51-55.
    • Handle: RePEc:eee:renene:v:79:y:2015:i:c:p:51-55
    DOI: 10.1016/j.renene.2014.10.030
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    References listed on IDEAS

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    1. Chen, Wei-Hsin & Tu, Yi-Jian & Sheen, Herng-Kuang, 2011. "Disruption of sugarcane bagasse lignocellulosic structure by means of dilute sulfuric acid pretreatment with microwave-assisted heating," Applied Energy, Elsevier, vol. 88(8), pages 2726-2734, August.
    2. Haghighi Mood, Sohrab & Hossein Golfeshan, Amir & Tabatabaei, Meisam & Salehi Jouzani, Gholamreza & Najafi, Gholam Hassan & Gholami, Mehdi & Ardjmand, Mehdi, 2013. "Lignocellulosic biomass to bioethanol, a comprehensive review with a focus on pretreatment," Renewable and Sustainable Energy Reviews, Elsevier, vol. 27(C), pages 77-93.
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    1. Duangporn Premjet & Suwanan Wongleang & Siripong Premjet, 2022. "Enhancing Glucose Recovery from Hibiscus cannabinus L. through Phosphoric Acid Pretreatment," Energies, MDPI, vol. 15(20), pages 1-15, October.
    2. Tye, Ying Ying & Lee, Keat Teong & Wan Abdullah, Wan Nadiah & Leh, Cheu Peng, 2016. "The world availability of non-wood lignocellulosic biomass for the production of cellulosic ethanol and potential pretreatments for the enhancement of enzymatic saccharification," Renewable and Sustainable Energy Reviews, Elsevier, vol. 60(C), pages 155-172.

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