Onwude, Daniel I. and Hashim, Norhashila and Abdan, Khalina and Janius, Rimfiel and Chen, Guangnan (2018) Investigating the influence of novel drying methods on sweet potato (Ipomoea batatas L.): Kinetics, energy consumption, color, and microstructure. Journal of Food Process Engineering, 41 (4):e12686.
Abstract
This study investigated the drying kinetics, specific energy consumption (SEC), color, and microstructural changes of sweet potato (Ipomoea batatas L.) based on experimental set-up of convective hot-air drying (CHAD), infrared drying (IRD), and combined infrared and convective-hot-air drying (IR-CHAD). The experiments were carried out at three air temperatures (50, 60 and 70 8C) and two IR intensities (1,100 and 1,400 W/m2) for sweet potato slices of 4 and 6 mm, respectively. The experimental results showed that the drying kinetics and mass transfer characteristic were significantly affected by drying air temperature, IR intensity, and thickness of the product. Combined IR-CHAD provided a higher drying rate with the shortest drying time when compared with CHAD and IRD. The IRD resulted in the lowest SEC values. The combined IR-CHAD resulted in 69.34–85.59% reduction in the SEC of CHAD. For combined IR-CHAD, an increase in the IR intensity at each temperature and slice thickness caused a decrease in the total SEC value. Dried sweet potato slices using CHAD and IR1-CHAD at intensity of 1,100 W/m2 showed the best color attributes. Combined IR-CHAD proved to be a very efficient drying method for the drying sweet potato and can be used for both industrial and commercial purposes.
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| Item Type: | Article (Commonwealth Reporting Category C) |
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| Refereed: | Yes |
| Item Status: | Live Archive |
| Additional Information: | Published online 23 March 2018. Permanent restricted access to ArticleFirst version in accordance with the copyright policy of the publisher. |
| Faculty/School / Institute/Centre: | Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -) |
| Faculty/School / Institute/Centre: | Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -) |
| Date Deposited: | 04 Apr 2018 00:42 |
| Last Modified: | 11 Apr 2021 22:54 |
| Uncontrolled Keywords: | drying methods, sweet potato, energy |
| Fields of Research (2008): | 09 Engineering > 0999 Other Engineering > 099901 Agricultural Engineering |
| Fields of Research (2020): | 40 ENGINEERING > 4099 Other engineering > 409901 Agricultural engineering |
| Socio-Economic Objectives (2008): | B Economic Development > 82 Plant Production and Plant Primary Products > 8203 Industrial Crops > 820399 Industrial Crops not elsewhere classified |
| Identification Number or DOI: | https://doi.org/10.1111/jfpe.12686 |
| URI: | http://eprints.usq.edu.au/id/eprint/33924 |
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