The Effect of Ohmic Heating Pretreatment on Drying of Apple

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Kutlu N., Yilmaz M. S., Arslan H., Isci A., Sakiyan Ö.

21st International Drying Symposium (IDS), Valencia, İspanya, 11 - 14 Eylül 2018, ss.1487-1494, (Tam Metin Bildiri) identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.4995/ids2018.2018.7375
  • Basıldığı Şehir: Valencia
  • Basıldığı Ülke: İspanya
  • Sayfa Sayıları: ss.1487-1494
  • Anahtar Kelimeler: Ohmic heating, drying, kinetic models, thin-layer models, apple, COLOR-CHANGE KINETICS, SOLAR
  • Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
  • Ankara Üniversitesi Adresli: Evet

Özet

In this study, effects of ohmic pretreatment on the drying rates and color kinetics of apple were investigated. Apple slices were treated at different electric field strengths (20-30 and 40 V/cm) at 60 degrees C for 1 min. Drying process was applied at 60 degrees C-2 m/s by using a fray-dryer. Delta E and moisture content were calculated. These values were fitted to the semi-theoretical thin-layer drying and the zero and first-order kinetic model. The shortest drying time was found samples treated with 30 V/cm. Wang&Singh model gave the superior fit to the experimental data. Delta E fitted well to the zero-order kinetic model.