Empirical Mathematical Model to Evaluate the Effective Diffusivity of Pumpkin Slice During Forced Air Convection Dryer

Benseddik, A.; Aberqi, Ahmed; Lalmi, Djemoui; Bensaha, Hocine; Zidoune, Mohammed Nasreddine; Allaf, Karim

doi:10.1007/978-981-15-5444-5_6

Cited by 1 publication

(1 citation statement)

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“…Several studies have focused on the use of hot air drying to reduce the moisture content of residues (Benseddik et al, 2020;Henríquez, Córdova, Almonacid, & Saavedra, 2014;Obied, Bedgood Jr, Prenzler, & Robards, 2008;Shah, Jani, & Khan, 2014;Wuttipalakorn, Srichumpuang, & Chiewchan, 2009). However, this technique is not adequate for some heat-sensitive agri-food by-products, as, the increase of the drying temperature results in an enzymatic and non-enzymatic degradation or decomposition of thermosensitive compounds (Gan, Ong, Chin, & Law, 2017;Larrauri, Rupérez, & Saura-Calixto, 1997;Mounir, Besombes, Al-Bitar, & Allaf, 2011).…”

Section: Introductionmentioning

confidence: 99%

A Mathematical Model for Dehydration by Successive Pressure Drops: Simulation of Discarded Potatoes Dehydration

Gutierrez-Pacheco

Palacios

Parra-Coronado

et al. 2021

jftr

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Dehydration by Successive Pressure Drops (SPD) is a process with high potential for treating heat-sensitive materials; this includes agro-industry by-products. However, the response of drying kinetics to operating conditions of SPD is not fully understood. The present manuscript refers to mathematical simulations to describe drying kinetics of discarded potatoes using SPD. While there are numerous theoretical, semi-theorical and empirical mathematical models, the selection of the appropriate model is a rigorous process. In this paper, the Thompson thin-layer semi-theoretical model was chosen since the assumptions for this model (e.g., product is arranged in thin layers) are fulfilled for the SPD. As a result of mathematical simulation, it was possible to describe the drying kinetics in terms of the major parameters of SPD namely pressurizing level (Pa) and the Frequency of Pressure Drop (FPD). The dehydration by SPD allows the removal of water from the material, mainly at the pressure drop. If this stage occurs more frequently, the drying rate increases. The model developed describes at less 91% of the variability of the experimental data. It is recommended to use high FPD and Pa equals to 0.50 MPa.

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