Few studies have been interested in the drying process of digestate and no information is available on the modelling. This research work consisted_in modelling the drying inetics and determining the moisture diffusivity. Experiments were performed using an air impingement dryer under 6 air velocities (1, 5, 7, 13, 17 and 19 m s(-1)) and 2 temperatures (40 degrees C and 70 degrees C). The time required to achieve a residual moisture content of 20% varied between 240 min and 140 min at 40 degrees C, and between 96 min to 60 min at 70 degrees C for 1 m s(-1) and 19 m s(-1), respectively. Experimental data were fitted to different curve fitting equations: the Lewis, the Modified Page and the Logarithmic equations. The analytical solution was also applied to identify the apparent moisture diffusivity. The effective moisture diffusivity at infinite air velocity, D-eff, was varied with the temperature and the values were equal to 1.70 x 10(-9) m(2) s(-1) at 40 degrees C and 3.98 x 10(-9) m s(-1) at 70 degrees C. Predictive equations for the apparent moisture diffusivity versus air velocity and temperature were determined. (C) 2019 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.