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Li M, Tian Y, Yang G, Fan L, Jiang L, Li R, Wang S. Dielectric heating technology assisted for multi-objective processing of agricultural products: research progress, challenges, and future perspectives. Crit Rev Food Sci Nutr 2025:1-25. [PMID: 40388687 DOI: 10.1080/10408398.2025.2506690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2025]
Abstract
Dielectric heating (DH) technology, including microwave and radio-frequency heating, is a type of advanced heating achieved through electromagnetic fields at specific frequencies. DH technology is widely used in the processing of various agricultural products and industrial-scale production owing to its green, efficient, and low-carbon nature. This paper reviewed the principles, typical systems, and devices of the DH technology. The mechanism and application of the DH technology in the processing of agricultural products are described. The research progress, application prospects, future research strategies, and limitations of DH technology in the multi-objective processing of agro-products were highlighted. Compared with traditional heating methods, DH with rapid, volumetric, and selective heating achieves good performance in drying, pasteurization, disinfestation, enzyme deactivation, and improvement of seed germination while producing high-quality agricultural products. Studies have shown that DH technology can simultaneously achieve multi-objective processing, which reduces processing steps, costs, and carbon emissions and raises economic returns. DH technology assisted in multi-objective processing could extend the shelf life and avoid spoilage of products during storage. Future research needs to be conducted with the help of computer simulations and artificial intelligence for parameter optimization and quality improvement to realize multi-objective DH technology in industrial applications.
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Affiliation(s)
- Mengge Li
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Yingqi Tian
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Gaoji Yang
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Liumin Fan
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Longlong Jiang
- Department of Biological Systems Engineering, Washington State University, Pullman, WA, USA
| | - Rui Li
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Shaojin Wang
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, China
- Department of Biological Systems Engineering, Washington State University, Pullman, WA, USA
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Zhang J, Tian Y, Ye X, Mo Z, Li R, Wang S. Effect of Processing Parameters on the Heating Uniformity of Postharvest Tobacco Leaves Subjected to Radio Frequency Disinfestations. INSECTS 2025; 16:228. [PMID: 40003857 PMCID: PMC11856596 DOI: 10.3390/insects16020228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2024] [Revised: 02/17/2025] [Accepted: 02/18/2025] [Indexed: 02/27/2025]
Abstract
Uneven heating is the biggest obstacle to the application of radio frequency (RF) technology in insecticidal applications. Since many existing studies have focused on the RF heating uniformity of granular materials, few RF treatment solutions have been reported for leaf materials. To improve the RF heating uniformity of tobacco leaves, a combined RF-hot air treatment method was developed for disinfestation in this study. The experiments were conducted to determine the effects of three process parameters (electrode gap, sample thickness, and hot air temperature) on the RF heating rate and uniformity of tobacco leaves. The results showed that the heating rate of RF-hot air combined treatment increased with decreasing electrode gap but increased with increasing sample thickness and hot air temperature. The RF heating uniformity in tobacco leaves decreased with increasing heating rate but could be significantly improved with the conveyor movement. Considering the heating uniformity and heating rate, the material thickness of 60 mm and electrode gap of 110 mm were selected as optimal process parameters. The results of the study may provide a feasible method to improve the RF heating uniformity in tobacco leaves and potential applications for effective disinfestations.
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Affiliation(s)
- Jinsong Zhang
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China; (J.Z.); (Y.T.); (X.Y.); (Z.M.); (R.L.)
| | - Yingqi Tian
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China; (J.Z.); (Y.T.); (X.Y.); (Z.M.); (R.L.)
| | - Xin Ye
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China; (J.Z.); (Y.T.); (X.Y.); (Z.M.); (R.L.)
| | - Zijun Mo
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China; (J.Z.); (Y.T.); (X.Y.); (Z.M.); (R.L.)
| | - Rui Li
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China; (J.Z.); (Y.T.); (X.Y.); (Z.M.); (R.L.)
| | - Shaojin Wang
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China; (J.Z.); (Y.T.); (X.Y.); (Z.M.); (R.L.)
- Department of Biological Systems Engineering, Washington State University, Pullman, WA 99164-6120, USA
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Zuo Y, Li Q, Zhang Z, Yang H, Wang S, Hou L. Developing a square container with ideal dielectric constant for improving radio frequency heating uniformity in low-moisture agricultural products. J FOOD ENG 2022. [DOI: 10.1016/j.jfoodeng.2022.111386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Computer simulation analyses to improve radio frequency heating uniformity for watermelon seeds by inserting horizontal aluminum and polypropylene (PP) plates in a rectangular PP container. INNOV FOOD SCI EMERG 2022. [DOI: 10.1016/j.ifset.2022.103118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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