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Mathematical modeling and polysaccharide content of Ganoderma lucidum by hot air impingement drying

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  131619320,  2013 Kansas City, Missouri, July 21 - July 24, 2013. (doi: http://dx.doi.org/10.13031/aim.20131619320) @2013
Authors:   Jun-Wen Bai, Hong-Wei Xiao, Zheng Lou, Zhen-Jiang Gao
Keywords:   drying Ganoderma lucidum air impingement Mathematical modeling polysaccharide

Abstract. Drying kinetics of Ganoderma lucidum was investigated in an air impingement dryer at the drying temperature of 55 – 70 oC with a constant air velocity of 15 m/s. The drying time decreased significantly with the increase of drying temperature. The experimental drying curves showed only a falling rate period. The experimental results were fitted to 10 thin-layer drying models and it was found that modified Page models best described the drying curves. The moisture effective diffusivity ranged from 1.96×10-9 to 6.01×10-9 m2/s calculated using the Fick’s second law of diffusion. Activation energy for moisture diffusion of the Ganoderma lucidum samples was found to be 69.05 kJ/mol. Ganoderma lucidum samples dried at 65 oC revealed the highest polysaccharide content than dried at other temperatures.

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