Thin-Layer Drying Characteristics and Quality Evaluation of Air-Dried Ganoderma Tsugae Murrill

Ganoderma is normally dried to extend its shelf life without using chemical preservative and to concentrate the medicinal value in the fruiting body. Convective hot air drying characteristics of Ganoderma tsugae Murrill were evaluated in hot air circulated oven at different drying temperatures, sizes, and air flow rates. The drying kinetics of Ganoderma tsugae in kidney shape and slices were investigated and compared at different drying conditions. The variation of effective moisture diffusivity values at decreasing moisture contents during drying was determined from the drying data. Four well-known thin-layer drying models were fitted to the experimental data and the Midilli model was found to satisfactory describe the drying characteristics of kidney-shaped Ganoderma tsugae. Ganoderma tsugae dried at 50°C with air velocity of 1.401 ms−1 showed the highest retention of crude ganoderic acid content compared to other drying conditions.

[1]  J. Westwater,et al.  The Mathematics of Diffusion. , 1957 .

[2]  J. R. O'Callaghan,et al.  Digital simulation of agricultural drier performance , 1971 .

[3]  S. M. Henderson,et al.  Progress in Developing the Thin Layer Drying Equation , 1974 .

[4]  W. Horwitz.  Official Methods of Analysis , 1980 .

[5]  Vaios T. Karathanos,et al.  Comparison of Two Methods of Estimation of the Effective Moisture Diffusivity from Drying Data , 1990 .

[6]  U. Pal,et al.  Thin layer convection-drying of mushrooms , 1997 .

[7]  L. Gothandapani,et al.  EVALUATION OF DIFFERENT METHODS OF DRYING ON THE QUALITY OF OYSTER MUSHROOM (Pleurotus sp) , 1997 .

[8]  F. Gurtas Seyhan,et al.  LOW TEMPERATURE MUSHROOM (A. bisporus) DRYING WITH DESICCANT DEHUMIDIFIERS , 2000 .

[9]  O. Paredes-López,et al.  EFFECT OF PRETREATMENT AND DRYING ON THE QUALITY OF OYSTER MUSHROOMS (PLEUROTUS OSTREATUS) , 2001 .

[10]  Ya-Jie Tang,et al.  Significance of inoculation density control in production of polysaccharide and ganoderic acid by submerged culture of Ganoderma lucidum , 2002 .

[11]  A. Midilli,et al.  A NEW MODEL FOR SINGLE-LAYER DRYING , 2002 .

[12]  C. Geankoplis,et al.  Transport Processes and Separation Process Principles , 2003 .

[13]  W. Cao,et al.  Thin-layer drying of Maitake mushroom analysed with a simplified model , 2003 .

[14]  G. Raghavan,et al.  DRYING KINETICS OF AGARICUS BISPORUS AND PLEUROTUS FLORIDA MUSHROOMS , 2003 .

[15]  G. Raghavan,et al.  Moisture adsorption isotherms for mushroom , 2004 .

[16]  Shu-Yao Tsai,et al.  Antioxidant properties of methanolic extracts from Ganoderma tsugae , 2005 .

[17]  Da‐Wen Sun,et al.  Dehydration of Concentrated Ganoderma lucidum Extraction by Combined Microwave-Vacuum and Conventional Vacuum Drying , 2006 .

[18]  S. G. Walde,et al.  Effects of pretreatments and drying methods on dehydration of mushroom , 2006 .

[19]  R. Paterson,et al.  Ganoderma - a therapeutic fungal biofactory. , 2006, Phytochemistry.

[20]  D. Guo,et al.  Quantitative determination of six major triterpenoids in Ganoderma lucidum and related species by high performance liquid chromatography. , 2006, Journal of pharmaceutical and biomedical analysis.

[21]  M. Rahman,et al.  Handbook of Food Preservation, Second Edition , 2007 .

[22]  Oktay Hacıhafızoğlu,et al.  Modelling of intermittent drying of thin layer rough rice , 2007 .

[23]  Suresh Prasad,et al.  Drying kinetics and rehydration characteristics of microwave-vacuum and convective hot-air dried mushrooms , 2007 .

[24]  G. Xanthopoulos,et al.  Evaluation of Thin-Layer Models for Mushroom (Agaricus bisporus) Drying , 2007 .

[25]  Orhan Aydin,et al.  Drying Kinetics of Red Delicious Apple , 2007 .

[26]  A. Mujumdar,et al.  Convective Drying of Ganoderma tsugae Murrill and Effect of Temperature on Basidiospores , 2008 .