Enhanced Bio-Ethanol Production from Industrial Potato Waste by Statistical Medium Optimization.
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 MgSO₄·7H₂O showed significantly positive effects, whereas KH₂PO₄ and CaCl₂·2H₂O had a significantly negative effect (p-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 MgSO₄·7H₂O 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.
Department of Agricultural and Biological Engineering, the Pennsylvania State University, University Park, PA 16802, USA. gxi111@psu.edu.
Gulten
G
Izmirlioglu
Department of Agricultural and Biological Engineering, the Pennsylvania State University, University Park, PA 16802, USA. demirci@psu.edu.|The Huck Institutes of Life Sciences, the Pennsylvania State University, University Park, PA 16802, USA. demirci@psu.edu.
Ali
A
Demirci
D000431:Ethanol / Q000378:metabolism*; D007220:Industrial Waste; D012440:Saccharomyces / Q000378:metabolism; D011198:Solanum tuberosum
D007220:Industrial Waste; D000431:Ethanol
Box-Behnken design; Plackett-Burman; Saccharomyces cerevisiae; bio-ethanol; industrial waste