期刊
BIORESOURCE TECHNOLOGY
卷 117, 期 -, 页码 242-250出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.04.013
关键词
Bio-ethanol fermentation; Glycerol; Dynamic model; Temperature
资金
- French National Agency for Research as part of the National Research Program on Biofuels
- CNRS
- Region Midi-Pyrenees
The impact of the temperature on an industrial yeast strain was investigated in very high ethanol performance fermentation fed-batch process within the range of 30-47 degrees C. As previously observed with a lab strain, decoupling between growth and glycerol formation occurred at temperature of 36 degrees C and higher. A dynamic model was proposed to describe the impact of the temperature on the total and viable biomass, ethanol and glycerol production. The model validation was implemented with experimental data sets from independent cultures under different temperatures, temperature variation profiles and cultivation modes. The proposed model fitted accurately the dynamic evolutions for products and biomass concentrations over a wide range of temperature profiles. R-2 values were above 0.96 for ethanol and glycerol in most experiments. The best results were obtained at 37 degrees C in fed-batch and chemostat cultures. This dynamic model could be further used for optimizing and monitoring the ethanol fermentation at larger scale. (C) 2012 Elsevier Ltd. All rights reserved.
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