Ethanol production from nonsterilized carob pod extract by free and immobilized Saccharomyces cerevisiae cells using fed-batch culture |
| |
Authors: | Roukas T |
| |
Affiliation: | Department of Food Science and Technology, Aristotelian University of Thessaloniki, Box 250, 540 06 Thessaloniki, Greece. |
| |
Abstract: | The production of ethanol from carob pod extract by free and immobilized Saccharomyces cerevisiae cells in batch and fed-batch culture was investigated. Fed-batch culture proved to be a better fermentation system for the production of ethanol than batch culture. In fed-batch culture, both free and immobilized S. cerevisiae cells gave the same maximum concentration (62 g/L) of final ethanol at an initial sugar concentration of 300 g/L and F = 167 mL/h. The maximum ethanol productivity (4.4 g/L h) was obtained with both free and immobilized cells at a substrate concentration of 300 g/L and F = 334 mL/h. In repeated fed-batch culture, immobilized S. cerevisiae cells gave a higher overall ethanol concentration compared with the free cells. The immobilized S. cerevisiae cells in Ca-alginate beads retained their ability to produce ethanol for 10 days. (c) 1994 John Wiley & Sons, Inc. |
| |
Keywords: | ethanol Saccharomyces cerevisiae carob pod fed-batch culture |
本文献已被 PubMed 等数据库收录! |
|