Abstract
Mango is widely preferred because of its excellent flavour and nutritional quality. Mango pulp fro m Dussehri variety was foam mat d ried using 0, 3, 5, 7, and 9% egg white as foaming agent and then dried at air dry ing temperature of 65, 75 and 85 o C. Weight loss was used to estimate change in mo iture ratio with respect to time and effective diffusivity. Seven thin layer drying models were fitted to get the best fit model, which was selected on the basis of various statistical parameters. Wang and Singh model was found to be best in almost all cases. Nutrit ional status in terms of total carotenes was estimated and it was observed that there was significant effect of drying temperatures and egg white concentration. Based on above parametres it was resolved that foam mat d rying using 3% egg white at 65 o C air dry ing temperature was the best combination.
Highlights
Mango (Mangifera indica L.) co mmonly known as king of fruits is a major fru it in Asia and around the world
The results are in accordance with the earlier observations for foam mat drying of tomato[9]
Fro m above it can be concluded that 3% egg white concentration is good due to effective drying rate
Summary
Mango (Mangifera indica L.) co mmonly known as king of fruits is a major fru it in Asia and around the world. India being the largest producer of mango contributes 37% o f total 30.5 million tons of global production[2]. Wide gap between total production and consumption due to poor transportation and storage facilit ies leads to post harvest losses[3]. To avoid post harvest losses and increase the shelf life mango has to be processed into shelf stable products. Spray drying of mango pulp produced good coloured powder but no pleasant flavour[5]. Freeze-dried mango pulp with added sugar produced powder with good shelf life but the cost was prohibitive[6]. Sweetened mango powder produced by drying, which involved mixing pulp with an equal quantity of sucrose and dried in a vacuum drier at 65°C and 27′′Hg vacuum for 8 h, retained 57% β-carotene at 38°C and 65% RH[7]
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