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KMID : 0613820120220010074
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Journal of Life Science
2012 Volume.22 No. 1 p.74 ~ p.79
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Optimum Enzyme Mixture of Cellulase, Hemicellulase, and Xylanase for Production of Water-Soluble Carbohydrates from Rice Straw
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Cho Sang-Buem
Lee Sang-Suk
Kim Chang-Hyun
Ryu Kyeong-Seon
Park Hee-Jun
Myong Hyun
Choi Nag-Jin
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Abstract
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This study was conducted to investigate the production of water-soluble carbohydrates (WSCs) by treatment of different amounts of rice straw with cellulase, hemicellulase, and xylanase. Treatment of high amounts of rice straw (100 g/l) with cellulase and hemicellulase resulted in similar production of WSCs. Reducing the amount of rice straw to 50 g/l decreased the production of WSCs by hemicellulase but had no effect on WSC production by cellulase. The interaction among rice straw amounts, and hemicellulase and xylanase activities was investigated using a Box Behnken design and a response surface model. An interaction was found only between hemicellulase and xylanase. An enzyme mixture consisting of 0.55 mg/ml of hemicellulase and 0.65 mg/ml of xylanase generated the highest amounts of WSCs, regardless of the amount of rice straw provided. Therefore, the activity of cellulase was higher than that of either hemicellulose or xylanase for WSC production from rice straw. The interaction observed for hemicellulase and xylanase indicates that a combined enzyme treatment could improve the production of WSCs from rice straw.
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KEYWORD
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Cellulase, hemicellulase, xylanase, water soluble carbohydrates, rice straw
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