15D-21 |
Application of pervaporation process for the refined alcoholic beverages |
Y. CHOI1, J. Yoo, and Y. Park. (1) Dept. of Food Science & Technology, Kyungpook Natioal University, 1370 Sankyuk-dong, Puk-gu, Taegu, 702-701, South Korea Pervaporation is a separation process where a liquid mixture is directlybrought into contact with a semi-permeable membrane and permeate is removed as a vapor by applying either vacuum or carrier gas to the permeate side. Since the pervaporation process could be applied to remove minor components of a liquid mixture, it was applied to remove impurities in the alcoholic beverages for the refined products with high quality. The objective of this study was to determine the process conditions such as membrane type, flux and pressure to elevate the purity of alcoholic beverage. The pervaporation experiments were carried out with samples having 5.8 - 43.1 wt% of alcohol contents by using PDMS(polydimethylsiloxane) 1060, 1070 and DS-7 pervaporation membrane. The flux of permeate was measured at various temperature, downstream pressures and different membrane types. The response surface methodology(RSM) was also applied to find out the optimum conditions of this process. Our results showed that the removal ratio of impurities such as aldehydes, ester and sulfides in the process of using PDMS membrane was higher than using DS-7 membrane. These results suggested that using the membrane which was a typical hydrophobic and elastomer pervaporation membrane such as polydimethylsiloxane, was more efficient than DS-7. In this syudy, downstream pressure was the most important factor affecting the performance of pervaporation. Depending upon the high or low downstream pressure, the overall results were remarkably different. This study confirmed that pervaporation could be used to extract the impurities of samples selectively and to produce the refined alcoholic beverages. This application has great potential for removing the impurities selectively in the alcoholic beverages processing.
Session 15D, Food Engineering: Processing Technologies
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