Analysis of Operating Conditions on Osmotic Dehydration of Plums (Prunus Domestica L.) and 3D-Numerical Determination of Effective Diffusion Coefficients
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María M. Rodríguez
,
Laura A. Campañone
Abstract
The objective of this work was to analyze the relevant process conditions on osmotic dehydration of plums and to determine the diffusion coefficients related to this process. The influence of solution (type and concentration of solute, temperature, fruit/solution ratio) and process time on water loss, water content and solutes gain were studied. Process analysis was performed experimentally by means of a set of 16 duplicate tests and numerically by mathematical modeling of the unsteady-state mass transfer phenomena. Experiments were carried out with glucose and sorbitol solutions (40–60 % w/w), dehydrating plum pieces during 2 h at temperatures of 25 and 40ºC, with fruit/solution ratios of 1/4 and 1/10. For calculating effective diffusion coefficients, a novelty inverse-method was applied, the approximate shape of food-pieces was considered using Finite Elements Method. Calculated diffusion coefficients ranged from 1.13 × 10−09 to 4.71 × 10−09 m2 s−1 and 0.44 × 10−09 to 3.46 × 10−09 m2 s−1, for water and solutes, respectively.
Funding statement: Consejo Nacional de Investigaciones Científicas y Técnicas.
References
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Artikel in diesem Heft
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- Development and Evaluation of a Small-scale In-field Integrated Postharvest Citrus Treatment Unit – Part 1
- Unripe Banana Flour Produced by Air-Drying Assisted with Ultrasound – Description of the Mechanisms Involved to Enhance the Mass Transfer in Two Approaches
- Analysis of Operating Conditions on Osmotic Dehydration of Plums (Prunus Domestica L.) and 3D-Numerical Determination of Effective Diffusion Coefficients
- Applying CFD for Studying the Dynamic and Thermal Behavior of Solar Chimney Drying System with Reversed Absorber
- Optimization and In-vitro Evaluation of Coating Process for Film-Coated Tablets
- Drying Kinetics of Continuous and Intermittent Heat Pump Drying of Green Soybean Seeds
- Predicting Storage Conditions for Rice Seed with Thermodynamic Analysis
- Preparation of Melatonin-Loaded Zein Nanoparticles using Supercritical CO2 Antisolvent and in vitro Release Evaluation
- A Simple Method to Prepare Raw Dehydrated Potato Flour by Low-Temperature Vacuum Drying
