Rehydration process of Boletus edulis mushroom: characteristics and modelling



Rehydration of air-dried Boletus edulis mushrooms was investigated at six temperatures (25, 30, 40, 50, 60 and 70 °C). To describe the rehydration kinetics, two empirical equations, Peleg and Weibull, and a diffusion model for a slab were considered. The empirical models described the rehydration process properly, while the diffusion model also described experimental data adequately when considering the moisture-dependent effective diffusion coefficient. The equilibrium moisture content increased in line with temperature up to 60 °C, then decreased. The kinetics constants of the Peleg and Weibull models, k1 and β respectively, were affected by temperature. This influence of temperature can be expressed in term of an Arrhenius relationship, with an average activation energy of 19.2 kJ mol−1. Copyright © 2005 Society of Chemical Industry