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Development of a Continuous System for 2-Phenylethanol Bioproduction by Yeast on Whey Permeate-Based Medium

Drężek, Karolina and Kozłowska, Joanna and Detman, Anna and Mierzejewska, Jolanta (2021) Development of a Continuous System for 2-Phenylethanol Bioproduction by Yeast on Whey Permeate-Based Medium. Molecules, 26 (7388). ISSN 1420-3049

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Official URL: https://www.mdpi.com/1420-3049/26/23/7388

Abstract

2-Phenylethanol (2-PE) is an alcohol with a rosy scent and antimicrobial activity, and therefore, it is widely used in the food and cosmetic industries as an aroma and preservative. This work was aimed to draw up a technology for 2-PE bioproduction on whey permeate, which is waste produced by the dairy industry, rich in lactase and proteins. Its composition makes it a harmful waste to dispose of; however, with a properly selected microorganism, it could be converted to a value-added product. Herein, two yeast Kluyveromyces marxianus strains and one Kluyveromyces lactis, isolated from dairy products, were tested for 2-PE production, firstly on standard media and then on whey permeate based media in batch cultures. Thereafter, the 2-PE bioproduction in a continuous system in a 4.8 L bioreactor was developed, and subsequently, the final product was recovered from culture broth. The results showed that the yield of 2-PE production increased by 60% in the continuous culture compared to batch culture. Together with a notable reduction of chemical oxygen demand for whey permeate, the present study reports a complete, effective, and environmentally friendly strategy for 2-PE bioproduction with a space-time yield of 57.5 mg L−1 h−1.

Item Type:Article
Subjects:Q Science > QD Chemistry
Q Science > QR Microbiology
T Technology > TP Chemical technology
Divisions:Department of Molecular Biology
ID Code:2124
Deposited By: dr inż. Anna Detman
Deposited On:16 Dec 2021 15:27
Last Modified:16 Dec 2021 15:27

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