Earticle

초록

영어

Rice straw is a lignocellulosic biomass that is a renewable organic substance and alternative source of energy. For the first time, rice straw was pretreated in a novel manner using TiO2/UV system and the pretreated rice straw was hydrolyzed using Accellerase 1000™.
Hydroxyl radicals (OH•) from TiO2/UV system could degrade lignin and carbohydrates. TiO2/UV pretreatment was essential step for conversion of hemicelluloses to xylose. The optimal conditions for TiO2/UV pretreatment were TiO2 concentration (0.1%, w/v), irradiation time (2 h), UV lamp type (UVC, 254 nm). Under these conditions and following enzymatic hydrolysis, the sugar yields were 59.6±0.7% for glucose (339±13 mg/g rice straw) and 50.3±2.8% for xylose (64±3 mg/g rice straw) of theoretical. The fermentation of enzymatic hydrolysates containing 10.5 g glucose/L and 3.2 g xylose/L with Pichia stipitis produced 3.9 g ethanol/L with corresponding yield of 0.39 g/g rice straw, which is 76.47% of the stoichiometric and fermentation efficiency yields. The TiO2/UV pretreatment method can be conducted at room temperature and atmospheric pressure. Also, TiO2/UV system has a price advantage.

키워드

저자

• Hee-Kyoung KANG [ The Research Institute for Catalysis and School of Biological Sciences and Technology, Chonnam National University, Gwang-Ju, 500-757. ]
• Jongho KIM [ School of Applied Chemical Engineering, Chonnam National University, Gwang-Ju, 500-757. ]
• Doman KIM [ The Research Institute for Catalysis and School of Biological Sciences and Technology, Chonnam National University, Gwang-Ju, 500-757. ]

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발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국생물공학회 학술대회

• 간기

  반년간

• 수록기간

  1985~2013

• 십진분류

  KDC 476 DDC 576