Solar convective drying in thin layers and modeling of municipal waste at three temperatures

The drying kinetics was studied at three temperatures (50, 70 and 90 °C) for air flow rate fixed at 0.083m3s-1. The drying rate is determined empirically from the characteristic drying curve. Then, the influence of air heated velocity, temperature of drying air and air moisture content on the drying kinetics of product was studied. Nine statistical models have been used for the description of drying curves. The Midilli and Kucuk model seems to be the most appropriate to describe the drying curves sludge with a highest value of correlation coefficient and in various aero-thermal conditions.