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Investigation of dynamic quality changes and optimization of drying parameters of carrots (Daucus carota var. laguna)

Md. Saleh, R.; Kulig, B.; Hensel, O. and Sturm, B. (2019) Investigation of dynamic quality changes and optimization of drying parameters of carrots (Daucus carota var. laguna). Journal of Food Process Engineering, e13314, pp. 1-17.

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Online at: https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfpe.13314

Summary

The effect of air temperature and sample thickness on the color changes and total carotenoids content of carrot slices was investigated. Temperature, exposure time, and moisture levels significantly affected the dynamic changes of total carotenoids and color. A slow and linear decrease in total carotenoids was observed at higher moisture content until reaching an inflection point at around 0.45 gw/gdm for all temperatures studied. Thereafter, the retention in total carotenoids decreased rapidly. The highest retention for a final product was 66.2% when drying at 60°C while retention was between 42.2 and 51.1% when drying at 50 and 70°C. These changes occurred alongside a noticeable change in color at moisture contents below the inflection point of 0.45 gw/gdm for all drying temperatures. Design of experiment based optimization of the drying process resulted in an ideal temperature of 59.8°C and 3.5 mm slice thickness with the predicted values for La*b*; ΔE of 62.18 ± 5.12, 22.46 ± 1.98, 40.35 ± 6.64, 6.31 ± 4.74; rehydration ratio of 0.48 ± 0.07; and total carotenoids of 163.83 ± 17.38 μg/g or 67.38%, respectively, all at a 95% prediction interval.


EPrint Type:Journal paper
Keywords:BÖLN, BOELN, BÖL, BOEL, FKZ 17OE005, SusOrgPlus, Core Organic Cofund, drying parameters, carrots, carotenoids
Subjects: Food systems > Processing, packaging and transportation
Food systems > Produce chain management
Research affiliation: European Union > CORE Organic Cofund > SusOrgPlus
Germany > Federal Organic Farming Scheme - BOELN > Food > Processing
Germany > University of Kassel > Department of Agricultural Engineering and Agricultural Engineering in the Tropics and Subtropics
Malaysia
H2020 or FP7 Grant Agreement Number:727495
Related Links:https://www.bundesprogramm.de, https://orgprints.org/cgi/search/advanced?addtitle%2Ftitle=&keywords=17OE005&projects=BOEL&_order=bypublication&_action_search=Suchen, https://projects.au.dk/coreorganiccofund/core-organic-cofund-projects/susorgplus/
Deposited By: Von Gersdorff, Gardis J.E.
ID Code:36901
Deposited On:11 Dec 2019 08:32
Last Modified:29 Jan 2020 11:12
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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