OSMOTIC DEHYDRATION OF PUMPKIN (Cucurbita moschata) IN SUCROSE AND SUCROSE-SALT SOLUTIONS. EFFECT OF SOLUTION COMPOSITION AND SAMPLE SIZE

Authors

  • Maria Florencia Kvapil
  • L.L. Chaillou
  • A.G. Qüesta
  • Rodolfo Mascheroni

DOI:

https://doi.org/10.52292/j.laar.2020.73

Keywords:

Anco pumpkin, Osmotic dehydration, Size, Sucrose, Sodium chloride

Abstract

Mass transfer during osmotic dehy-dration (OD) of pumpkin cubes was studied as a function of sample size and composition and con-centration of sucrose dehydrating solution. Models of Azuara and Hawkes & Flink were adjusted to the experimental data and optimal dehydrating conditions could be specified. For equal solutes concentration, higher weight losses were reached for smaller size samples. The addition of 2% NaCl increased Water Loss (WL) and lowered Solids Gain (SG) for the solution of higher sucrose con-tent. Prediction capacity of the simplified models was very good under the tested working conditions. In brief, OD can be optimized using 1 cm side cu-bes dehydrated in binary or ternary solutions at the higher sucrose content (55ºBx), maximizing WL and minimizing SG.

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Published

2020-06-24

Issue

Vol. 50 No. 3 (2020): Latin American Applied Research

Section

Heat and Mass Transfer

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