The moisture content (H) of the ginger was measured by the toluene distillation method according to AOCS [34], which can distinguish water from volatile material, as previously reported by [29]. The real density of the milled ginger was measured using a helium pycnometer at the Institute of Chemistry, Unicamp, Campinas, São Paulo, Brazil. The characteristics of the particles and particle bed used in this work were [29]: average particle diameter of 6.27 × 10−4m, true particle density of 1900 kg m−3, apparent bed density of 226.42 kg m−3 and particle bed porosity of 0.88. The moisture content of the raw ginger was 83.91 ± 1.67 wt% (mass of water/mass of dried solid) and for the dried ginger it was 10.80 ± 1.04 wt%.