Mathematical modelling of the osmotic dehydration of physalis

Fernanda Rosa Assis, Rui Manuel Santos Costa de Morais, Alcina Maria Miranda Bernardo de Morais*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Physalis was osmotically dehydrated with 60°Bx sucrose or sorbitol solutions at 60 °C and with a mass ratio of sample to solution of 1:4, at atmospheric pressure or under vacuum at 150 mbar. The Crank's, Peleg's and Page's models were tested to describe the mass transfer kinetics for water loss (WL) and solids gain (SG). The effective diffusivities of both water and solute were around 10-11 m2 s-1 under all conditions. Peleg's model presented the best fit. The use of sorbitol as the osmotic agent resulted in an increase in the WL rate. In experiments with sucrose solutions, a higher WL was obtained under vacuum than at atmospheric pressure. The SG was particularly low during osmotic dehydration. Thus, the use of sorbitol as the osmotic agent was shown to be a promising alternative to sucrose.
Translated title of the contributionModelagem matemática da desidratação osmótica da physalis
Original languageEnglish
Article numbere2017102
Number of pages5
JournalBrazilian Journal of Food Technology
Publication statusPublished - 2018


  • Mass transfer
  • Mathematical models
  • Osmotic dehydration
  • Physalis
  • Sorbitol
  • Vacuum


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