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

V. A. Revaskar, P. S. Pisalkar, Pankaj B. Pathare*, G. P. Sharma

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)92-99
Number of pages8
JournalResearch in Agricultural Engineering
Volume60
Issue number3
DOIs
Publication statusPublished - 2014

Keywords

  • Diffusivity
  • Drying
  • Mathematical models
  • Onion
  • Osmotic dehydration

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Agronomy and Crop Science

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