Peanut hull (peanut pods and waste materials from processing of peanuts) was pelleted through a 3/16-in. (4.76 mm) diameter die. The
effect of change in moisture content (4.2–21.2%, wet basis) of the pellets (due to exposure of the pellets to low or high humidity storage
environments) on physical properties were measured. Pelleting increased the bulk density of the peanut hull from 151 kg/m3 to more than
600 kg/m3. Bulk density, particle density and durability of the pelleted peanut hull of pellets were significantly affected by moisture content
attained by the pellets during exposure to the low or high humidity environment. Air relative humidity significantly influenced the
rate at which the pellets exchange moisture with the environment while air temperature did not. The values of the constants of the GAB
model were obtained from moisture sorption isotherm at 25 C.