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- Title
EVALUATION OF EXISTING THIN LAYER DRYING MODELS ON DRYING KINETICS OF PERSIMMON (DIOSPYROS KAKI L.).
- Authors
Hanif, Muhammad; Khattak, Mansoor Khan; ur Rahman, Masood; Khan, Maaz Ullah
- Abstract
A study was conducted in the Department of Agricultural Mechanization, Faculty of Crop Production Sciences, University of Agriculture, Peshawar, Pakistan during 2012 to dry persimmons and decrease the moisture content to a level that allows safe storage over an extended period of time. For this purpose persimmons were dried using a flat plate solar collector connected to a dehydrator under three different drying temperatures (40, 50 and 60°C). Persimmons slices were dehydrated from 82 percent to less than 10 percent moisture content. Persimmons dried at high temperature of 60oC took 16 hours of drying period followed by 50°C (20 hours) and 40°C (26 hours). The drying data were then fitted with 12 existing and already published thin layer drying models. For selection of the best model these models were investigated by comparing determination of coefficient (R²) and reduced root mean square error (RMSE) between the experimental and predicted values. The results showed that model [aexp(-ktn) + cexp(-gtn)] was found as the best model that described the drying kinetics of persimmons at all three drying temperatures with R² and RMSE values of 0.999 and 0.023 for 40oC, 0.989 and 0.021 for 50°C and 0.988 and 0.021 for 60oC respectively. In the light of regression analysis it was concluded that same model was proved as the best model describing drying kinetics of persimmons.
- Subjects
KAKI persimmon; DRYING; PERSIMMON; SOLAR collectors; THIN layer chromatography
- Publication
Journal of Agricultural Research (03681157), 2015, Vol 53, Issue 2, p269
- ISSN
0368-1157
- Publication type
Article