To improve the conversion rate of the saccharification liquid of food wastes, containing a mixture of pentose and hexose, to bioethanol, this study aimed to investigate the fermentation characteristics by P. stipitis which is used in the fermentation of xylose as well as glucose as a substrate. Saccharification liquid of cellulosic food wastes such as Chinese cabbage, cabbage, and Chinese chive contained hexose, mainly glucose and fructose, and pentose, mainly xylose and trace disaccharide. The pentose in reducing sugar occupied 32%, meaning that the conversion rate to ethanol could be increased by the fermentation of such a pentose. From the result of ethanol fermentation, although the rate of fermentation by P. stipitis was slower than by S. coreanus, it was verified the consumption of pentose as well as hexose in the process of the forced air injection, consequently, it was confirmed the increase of ethanol yield.

• 정승미(목포해양대학교 환경·생명공학과) | Seung-Mi Jeong
• 김용진(목포해양대학교 환경·생명공학과) | Yong-Jin Kim Corresponding author