POST HARVEST TECHNOLOGY OF CEREALS PULSES AND OILSEEDS |
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| Authors: | Dr. T. Kudra Dr. G.S.V. Raghavan |
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| Affiliation: | 1. on leave from Institute of Chemical Engineering Lodz Technical University , Poland;2. Department of Agricultural Engineering , Macdonald College of McGill University , Ste Anne de Bellevue, PQ, Canada , H9X 1C0 |
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| Abstract: | ABSTRACT The weight and water loss of 6 mm thick pineapple slabs (one of a six part of slice) were analyzed during osmotic dehydration in sucrose solution at different temperatures (50, 60 and 70°C), sucrose concentrations (50, 60 and 70°Bx) and pH's (6, 7 and 8), in 33 experimental design. These results were fitted to a modified Azuara equation to obtain water and sucrose diffusivity results at equilibrium condition. Mean result of water diffusivity was 1.717 × 10?5 cm2/s and sucrose diffusivity varied from 2.0 to 4.6 × 10?5 cm2/s. The results of water loss at equilibrium in pineapple slabs varied between 0.6 to 0.67 g/g of initial sample weight. The results of sucrose gain at equilibrium varied between 0.15 and 0.21 g/g of initial sample weight. The results from mathematical modeling were compared to experimental results with r 2 = 0.94. |
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| Keywords: | Mass transfer Modeling Tropical fruit processing |
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