Emmanuel Adu Amankwah

Emmanuel Adu Amankwah

Wageningen University
The Netherlands

Title: Modeling the drying and sorption behavior of yam (Dioscoreaceae rotundata)


E. A. Amankwah is presently a Ph.D. student at the Wageningen University Research Center, The Netherlands and a lecturer at the Kwame Nkrumah University of Science and Technology, Kumasi, Ghana. He has published more than 10 papers in reputed journals and currently working on his final thesis.


Drying experiments on a pilot scale air dryer in the temperature range 30–500C and sorption isotherms at 25 and 50 of yam (D. rotundata, Dente) cuts were investigated. Drying empirical models were fitted to the experimental drying and sorption datas. The Henderson and Pabis model fitted well the experimental drying data while the GAB model fitted well the desorption data. The drying rate, showed strong relationship with temperature. By ignoring shrinkage effective moisture diffusivity ranged between 2.29x10-11 – 6.65x10-11 while activation energy was recorded as 44.06 kJ/mol. Diffusivity was observed to be a function of temperature.

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