An ANOVA experimental design was performed to study the effect of the operating variables on the drying time. Temperature has the most important effect on drying time (88.47%), followed by tray rotation, which had a 6.4% contribution to the drying time. This contribution was higher than the corresponding contribution of air velocity (4.6%). Great variations in moisture content were observed for the top and the bottom samples for the non rotational experiments, which was possibly due to an uneven temperature distribution in the drying chamber. The tray rotation effect can be evidenced by following the drying curves for the top and the bottom samples in a non rotational drying run