Original scientific paper
https://doi.org/10.33128/pc.24.1-4.2
Influence of laser pretreatment on the convection drying rate of grapes
Ante Galić
orcid.org/0000-0002-0155-7228
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Stjepan Pliestić
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Jana Šic Žlabur
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Nick Borna Pavić
; student Agronomskog fakulteta Sveučilišta u Zagrebu, Zagreb, Hrvatska
Sandra Voća
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Abstract
Grapes are mainly dried for the purpose of raisin production and aromatization and production of dessert wines. The main goals of grape drying are to shorten the duration of the process and to reduce costs while maintaining nutritional and sensory properties. Non-invasive techniques such as laser can be applied as pre-treatment for drying. The use of low-power lasers causes more positive reactions on plant material, which provides opportunities for their widespread use in processing and finishing of agricultural products. Analyses were performed on Muscat Hamburg and Traminac grape varieties. Drying of the control sample and laser-treated berries (with output powers 100 and 200 mW) was performed in the laboratory dryer at a temperature of 40 ºC. The duration of convection drying was shorter for the Traminac variety than for the Muscat Hamburg variety. A reduction in drying time was observed for the variety Muscat Hamburg with laser treatment 100 mW during 60 s, while a reduction in drying time was observed for the variety Traminac at 100 and 200 mW laser during 60 s pretreatment.
Keywords
berries; grapes; laser; drying; Traminac; Muscat Hamburg
Hrčak ID:
261917
URI
Publication date:
16.8.2021.
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