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Dehydration kinetics of onion slices in osmotic and air convective drying process

Lookup NU author(s): Dr Pankaj Pathare



This is the final published version of an article that has been published in its final definitive form by Czech Academy of Agricultural Sciences, 2014.

For re-use rights please refer to the publisher's terms and conditions.


The effect of different pre-treatments (i.e. osmotic dehydration in 10, 15 and 20°Brix NaCl solution and drying air temperature of 50, 60 and 70°C) on drying behaviour of onion slices were investigated. The onion slices were dried in a laboratory model tray dryer. Drying of onion slices occurred in falling rate period. Five thin-layer drying models (Exponential, Page, Henderson and Pabis, Logarithmic and Power law) were fitted to the moisture ratio data. Among the drying models investigated, the Page model satisfactorily described the drying behaviour of onion slices. The effective moisture diffusivity of pre-treated samples was higher than that of non-treated samples.

Publication metadata

Author(s): Revaskar VA, Pisalkar PS, Pathare PB, Sharma GP

Publication type: Article

Publication status: Published

Journal: Research in Agricultural Engineering

Year: 2014

Volume: 60

Pages: 92-99

Acceptance date: 26/08/2014

Date deposited: 07/04/2016

ISSN (print): 1212-9151

ISSN (electronic): 1805-9376

Publisher: Czech Academy of Agricultural Sciences