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Low humidity air drying of apple slices: Effect of EMR pretreatment on mass transfer parameters, energy efficiency and quality.

IR@CSIR-CFTRI

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Relation http://ir.cftri.com/14626/
https://doi.org/10.1016/j.ifset.2019.05.006
 
Title Low humidity air drying of apple slices: Effect of EMR pretreatment on mass
transfer parameters, energy efficiency and quality.
 
Creator Sandhya, R. Shewale
Deependra, Rajoriya
Umesh Hebbar, H.
 
Subject 01 Apple
02 Drying and Dehydration
 
Description The apple slices were treated with electromagnetic radiations (EMR) namely, infrared (IR) and microwave (MW)
and dried using low humidity air (LHA) and normal hot air (HA) at 40 °C. The effect of EMR pretreatment on
drying kinetics, mass transfer, shrinkage, porosity, energy efficiency and product quality was evaluated. The
combination of EMR pretreatment with LHA drying reduced the drying time by 23.4 to 27.3%, and the dried
product had lower shrinkage (60 to 65%) as well as higher porosity (0.38 to 0.45) compared to control. Among
the EMR pretreatments, IR treated slices retained a higher amount of ascorbic acid (78.68%), phenolic content
(74.42%), antioxidant activity (79.54%) and better color compared to MW treated. EMR pretreatment reduced
the energy requirement for drying by 26.5 to 37.1%. The mass transfer parameters (moisture diffusivity and
mass transfer coefficient) estimated using the analytical model proposed by Dincer and Dost showed higher
values for EMR treated samples. Moisture content predicted for both the drying methods showed good agreement with experimental values. The present study demonstrated that for heat sensitive products like apple, a
combination of IR pretreatment and LHA drying could be effective for reducing drying time as well as energy
requirements and also to obtain better quality products.
 
Date 2019
 
Type Article
PeerReviewed
 
Format pdf
 
Language en
 
Identifier http://ir.cftri.com/14626/1/Innovative%20Food%20Science%20and%20Emerging%20Technologies%2055%20%282019%29%201%E2%80%9310.pdf
Sandhya, R. Shewale and Deependra, Rajoriya and Umesh Hebbar, H. (2019) Low humidity air drying of apple slices: Effect of EMR pretreatment on mass transfer parameters, energy efficiency and quality. Innovative Food Science and Emerging Technologies, 55. pp. 1-10.