1Central Institute of Agricultural Engineering, Nabibagh, Berasia Road, Bhopal-462038 (MP).
2Faculty of Agricultural Engineering, Indira Gandhi Agricultural University, Raipur (Chhattisgarh).
Drying of ginger (Zingiber officinale) flakes was studied under fluidized bed conditions in the temperature range of 50 to 80°C and pretreatment of calcium oxide in the range of 1 to 2.5%. Drying rate at 60°C air temperature decreased from 0.43 to 0.17 g/s with the change in moisture content from 300 to 10% d.b. The volatile oil in dried flakes decreased from 1.2 to 0.99% with increase in drying temperature from 50 to 80°C. The effect of drying temperature and concentration of calcium oxide on colour L*(lightness) value and drying ratio was non-significant at P>0.05, however, these had significant effect on rehydration ratio.
