Drying kinetics of ginger (Zingiber officinale) slices under going microwave drying.

The drying characteristics of ginger slices were investigated in an experimental microwave dryer and modeled at 1.0, 1.5, 2.0 and 2.5 kW power levels. The entire drying process took place in the falling rate period. The effective moisture diffusivity values ranged from 2.5356 × 10 to 1.2678 × 10 m/s within the power levels (1.0 to 2.5 kW) studied. Exponential, Page, Henderson and Pabis, Logarithmic and Power law models were applied and validated on the basis of determination of coefficient (R), reduced mean square () of the deviation, mean bias error (E MB ) and root mean square error (E RMS ) between the observed and predicted values of moisture ratios. Page model was found to fit best, representing an excellent tool for estimation of the drying time and the values of R, 2, E RMS and E MB were in the ranged of 0.995 to 0.997; 0.0006 to 0.005; 0.022 to 0.038 and 0.005 to 0.009, respectively.

[1]  M. Miranda,et al.  Hot-air drying characteristics of Aloe vera (Aloe barbadensis Miller) and influence of temperature on kinetic parameters , 2007 .

[2]  B. Özbek,et al.  Thin-layer drying characteristics and modelling of mint leaves undergoing microwave treatment , 2007 .

[3]  Mehmet Pala,et al.  Drying characteristics of dill and parsley leaves , 2006 .

[4]  M. Hawlader,et al.  Mathematical modelling and experimental investigation of tropical fruits drying , 2005 .

[5]  V. Demir,et al.  Mathematical Modelling and the Determination of Some Quality Parameters of Air-dried Bay Leaves , 2004 .

[6]  E. Akpinar,et al.  Thin layer drying of red pepper , 2003 .

[7]  Osman Yaldýz,et al.  THIN LAYER SOLAR DRYING OF SOME VEGETABLES , 2001 .

[8]  W. Mcminn,et al.  Principles, Methods and Applications of the Convective Drying of Foodstuffs , 1999 .

[9]  F. W. Bakker-Arkema,et al.  Stochastic Modelling of Grain Drying: Part 2. Model Development , 1997 .

[10]  Arun S. Mujumdar,et al.  Solar drying of foods: Modeling and numerical simulation , 1997 .

[11]  Prabir K. Chandra,et al.  Applied Numerical Methods for Food and Agricultural Engineers , 1994 .

[12]  L. Diamante,et al.  Mathematical modelling of the thin layer solar drying of sweet potato slices , 1993 .

[13]  Food Dehydration , 1943, Science.

[14]  Amin Taheri-Garavanda,et al.  Mathematical Modeling of Thin Layer Drying Kinetics of Tomato Influence of Air Dryer Conditions , 2011 .

[15]  H. Ramaswamy,et al.  CONVECTIVE-AIR DRYING KINETICS OF OSMOTICALLY PRE-TREATED BLUEBERRIES , 1998 .

[16]  Qin Zhang,et al.  AN OPTIMIZATION OF INTERMITTENT CORN DRYING IN A LABORATORY SCALE THIN LAYER DRYER , 1991 .

[17]  S. M. Hendorson.  Grain Drying Theory (I) Temperature Effect on Drying Coefficient , 1961 .