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

Author

Listed:
  • V.A. Revaskar

    (Department of Processing & Food Engineering, Maharana Pratap University of Agriculture and Technology, Udaipur, India)

  • P.S. Pisalkar

    (Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, India)

  • P.B. Pathare

    (Department of Process & Chemical Engineering, University College Cork, Ireland)

  • G.P. Sharma

    (Department of Processing & Food Engineering, Maharana Pratap University of Agriculture and Technology, Udaipur, India)

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

Suggested Citation

  • V.A. Revaskar & P.S. Pisalkar & P.B. Pathare & G.P. Sharma, 2014. "Dehydration kinetics of onion slices in osmotic and air convective drying process," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 60(3), pages 92-99.
    • Handle: RePEc:caa:jnlrae:v:60:y:2014:i:3:id:22-2012-rae
    DOI: 10.17221/22/2012-RAE
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    Cited by:

    1. Anirban Dey & Somya Singhal & Prasad Rasane & Sawinder Kaur & Navneet Kaur & Jyoti Singh, 2019. "Comparative kinetic analysis of convective and vacuum dried Opuntia ficus-indica (L.) Mill. cladodes," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 65(1), pages 1-6.
    2. R.A. Chayjan & M. Kaveh, 2016. "Drying characteristics of eggplant (Solanum melongena L.) slices under microwave-convective drying," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 62(4), pages 170-178.

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