Enhanced Bio-Ethanol Production from Industrial Potato Waste by Statistical Medium Optimization

International Journal of Molecular Sciences

Gulten Izmirlioglu²  Ali Demirci²  Marianne Su-Ling Brooks¹ 

[1] Department of Agricultural and Biological Engineering, the Pennsylvania State University, University Park, PA 16802, USA; E-Mail;Department of Agricultural and Biological Engineering, the Pennsylvania State University, University Park, PA 16802, USA; E-Mail:

关键词: bio-ethanol;    Saccharomyces cerevisiae;    industrial waste;    Plackett-Burman;    Box-Behnken design;   

DOI  :  10.3390/ijms161024490

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.