초록
<P>Industrial wastes are of great interest as a substrate in production of value-added products to reduce cost, while managing the waste economically and environmentally. Bio-ethanol production from industrial wastes has gained attention because of its abundance, availability, and rich carbon and nitrogen content. In this study, industrial potato waste was used as a carbon source and a medium was optimized for ethanol production by using statistical designs. The effect of various medium components on ethanol production was evaluated. Yeast extract, malt extract, and MgSO<SUB>4</SUB>·7H<SUB>2</SUB>O showed significantly positive effects, whereas KH<SUB>2</SUB>PO<SUB>4</SUB> and CaCl<SUB>2</SUB>·2H<SUB>2</SUB>O had a significantly negative effect (<I>p</I>-value < 0.05). Using response surface methodology, a medium consisting of 40.4 g/L (dry basis) industrial waste potato, 50 g/L malt extract, and 4.84 g/L MgSO<SUB>4</SUB>·7H<SUB>2</SUB>O was found optimal and yielded 24.6 g/L ethanol at 30 °C, 150 rpm, and 48 h of fermentation. In conclusion, this study demonstrated that industrial potato waste can be used effectively to enhance bioethanol production.</P>