The Effect of Pretreatment and Hot-air Drying Parameters on the Drying Behavior and Quality Properties of Onion (Allium cepa L.)
Maryam Hanif, Amal Brahimi, Abdelhakim Boudboud, Ali Assifaoui, Hassan Hajjaj, Hamid Mazouz and Abdelhay Elharrak
Hot-air drying is widely applied for onion (Allium cepa) preservation, but processing conditions strongly influence the quality of the final powder. This study evaluated the effects of blanching time (0, 3, and 5 min), antibrowning treatments (sodium metabisulfite (Na₂S₂O₅) or sodium sulfite (Na₂SO₃); 0.05 – 0.2% w/v), and drying temperature (60 – 80 °C) on physicochemical, biochemical and sensory properties of onion powder.
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