Effects of pretreatments on drying of Turkey berry (Solanum torvum) in fluidized bed dryer

The influence of pretreatment methods like physical, chemical, combined physical, and hybrid treatments on the Turkey berry (Solanum torvum) fruits to enhance the water diffusion during drying was assessed due to removing a waxy layer on the peel. Pretreated and untreated samples were dried at 70 ?C...

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Bibliographic Details
Published in:Chemical Industry and Chemical Engineering Quarterly 2022-01, Vol.28 (3), p.169-178
Main Authors: Barathiraja, R., Thirumal, P., Saraswathy, G., Rahamathullah, I.
Format: Article
Language:English
Subjects:
color
effective moisture diffusivity
pretreatment
shrinkage
turkey berry
vitamin c
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Summary:The influence of pretreatment methods like physical, chemical, combined physical, and hybrid treatments on the Turkey berry (Solanum torvum) fruits to enhance the water diffusion during drying was assessed due to removing a waxy layer on the peel. Pretreated and untreated samples were dried at 70 ?C and 4 m/s of air flow in a fluidized bed dryer. Fruits pretreated with combined abrasion and blanching have the lowest drying time and good vitamin C content retention of 36%. The highest drying rate of 0.396 kg water/kgdb min?1, maximum effective moisture diffusivity of 6.002 x 10-10 m2/s, and volumetric shrinkage ratio of 0.68 were obtained for fruits that undergone combined physical pretreatment along with drying. The maximum change in color ?E = 14.75 and Chroma ?C = - 10.53 were obtained for the untreated samples.
ISSN:1451-9372
2217-7434
DOI:10.2298/CICEQ201120028B