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Int. J. Mol. Sci. 2015, 16(10), 24490-24505; doi:10.3390/ijms161024490

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

1
Department of Agricultural and Biological Engineering, the Pennsylvania State University, University Park, PA 16802, USA
2
The Huck Institutes of Life Sciences, the Pennsylvania State University, University Park, PA 16802, USA
*
Author to whom correspondence should be addressed.
Academic Editors: Marianne Su-Ling Brooks and Marcello Iriti
Received: 20 August 2015 / Revised: 18 September 2015 / Accepted: 24 September 2015 / Published: 15 October 2015
(This article belongs to the Special Issue Bioprocess Engineering)
View Full-Text   |   Download PDF [1258 KB, uploaded 15 October 2015]   |  

Abstract

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. View Full-Text
Keywords: bio-ethanol; Saccharomyces cerevisiae; industrial waste; Plackett-Burman; Box-Behnken design bio-ethanol; Saccharomyces cerevisiae; industrial waste; Plackett-Burman; Box-Behnken design
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Izmirlioglu, G.; Demirci, A. Enhanced Bio-Ethanol Production from Industrial Potato Waste by Statistical Medium Optimization. Int. J. Mol. Sci. 2015, 16, 24490-24505.

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