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Effect of pretreatments on solar dehydration of different varieties of apple (Malus domestica)

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  • Sevil Karaaslan
  • Kamil Ekinci

    (Department of Agricultural Machinery and Technologies Engineering, Faculty of Agriculture, Isparta University of Applied Sciences, Isparta, Turkey)

Abstract

In this study, four different apple varieties were dried in a solar tunnel dryer using four different methods. Apple slices were immersed in a solution consisting of 0.5% ascorbic acid, 0.5% sodium metabisulphite, and 0.5% citric acid for 3 min. Constant measurements were performed in various parts of the dryer for drying air temperature, solar irradiation, air velocity, and relative humidity during drying. The change in the mass of apples was measured on a daily basis. Furthermore, ten mathematical models were used to study the drying process, which were Newton, Page, Henderson and Pabis, logarithmic, diffusion, two-term, two-term exponential, Midilli, Alibas, and logistic equation. Then, these models were compared in terms of their performance levels based on correlation coefficient (R2), chi-square value (χ2), and root mean square error (RMSE) between moisture ratios (MR) that were observed and predicted. Furthermore, we observed that the Alibas model and the two-term model revealed the ratio of drying in a satisfactory way for all drying methods.

Suggested Citation

  • Sevil Karaaslan & Kamil Ekinci, 2022. "Effect of pretreatments on solar dehydration of different varieties of apple (Malus domestica)," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 40(2), pages 93-101.
    • Handle: RePEc:caa:jnlcjf:v:40:y:2022:i:2:id:201-2021-cjfs
    DOI: 10.17221/201/2021-CJFS
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    References listed on IDEAS

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    1. Rathore, N.S. & Panwar, N.L., 2010. "Experimental studies on hemi cylindrical walk-in type solar tunnel dryer for grape drying," Applied Energy, Elsevier, vol. 87(8), pages 2764-2767, August.
    2. Stela JOKIĆ & Darko VELIĆ & Mate BILIĆ & Jasmina LUKINAC & Mirela PLANINIĆ & Ana BUCIĆ-KOJIĆ, 2009. "Influence of process parameters and pre-treatments on quality and drying kinetics of apple samples," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 27(2), pages 88-94.
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    Cited by:

    1. Qiyao Dong & Huaipan Liu & Ronald Kurtenbach, 2022. "Polyamines in plasma membrane function in melatonin-mediated tolerance of apricot fruit to chilling stress," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 40(4), pages 313-322.

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