Developing ultrasound-assisted hot-air and infrared drying technology for sweet potatoes

被引:29
作者
Rashid, Muhammad Tayyab [1 ]
Liu, Kunlun [1 ]
Jatoi, Mushtaque Ahmed [2 ]
Safdar, Bushra [3 ]
Lv, Dingyang [1 ]
Wei, Dengzhong [1 ]
机构
[1] Henan Univ Technol, Coll Food Sci & Engn, Zhengzhou 450001, Peoples R China
[2] Shah Abdul Latif Univ, Dept Bot, Burlington 66020, Pakistan
[3] Beijing Technol & Business Univ, Beijing Adv Innovat Ctr Food Nutr & Human Hlth, Beijing 100048, Peoples R China
基金
中国国家自然科学基金;
关键词
Sweet potatoes; Drying; Ultrasound; Mathematical modeling; Exergetic analysis; ANTIOXIDANT ACTIVITY; PHYSICOCHEMICAL PROPERTIES; FUNCTIONAL-PROPERTIES; INTENSITY ULTRASOUND; OSMOTIC DEHYDRATION; POLYPHENOL OXIDASE; QUALITY ATTRIBUTES; RELATIVE-HUMIDITY; KINETICS; APPLE;
D O I
10.1016/j.ultsonch.2022.106047
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
The influence of ultrasound (US) pretreatments combined with infrared (IRD) and hot-air (HAD) drying on drying kinetics, mathematical modeling, bioactive compounds (antioxidant activities, Vitamin C, phenolics, and flavonoid contents), qualitative properties (beta-carotene, total carotenoids, color indexes, textural profile), enzyme inactivation, and exergetic analysis of sweet potatoes. The US pretreatment at 40 kHz combined with IRD and HAD (70 degrees C) significantly lessened the drying time and water contents. Besides, it did not affect the sweet potato's bioactive components and other quality-related attributes. The samples' activation energy (E-a) ranged from 17.60 to 29.86 kJ/mol for both dryers, with R-2 (0.999-0.9809). Control samples had the highest specific energy consumption (SEC) due to the extended drying period, whereas ultrasound (40 kHz) treated samples had the lowest SEC during HAD and IRD at 80 degrees C. The thermodynamic parameters indicated that increasing the drying temperature lowers the enthalpy and Gibbs free energy, while entropy resulted in negative values. HAD had better textural qualities (hardness and resilience). The US pretreatments followed by HAD or IRD may lead to an energy-efficient method with acceptable quality maintenance.
引用
收藏
页数:15
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