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Continuous tubular microwave heating of particulate foods at high temperatures
RISE - Research Institutes of Sweden, Bioscience and Materials, Agrifood and Bioscience.
RISE - Research Institutes of Sweden, Bioscience and Materials, Agrifood and Bioscience.
RISE - Research Institutes of Sweden, Bioscience and Materials, Agrifood and Bioscience.ORCID iD: 0000-0002-2149-4586
2017 (English)In: The Journal of microwave power and electromagnetic energy, ISSN 0832-7823Article in journal (Refereed) In press
Abstract [en]

A pilot-scale process for continuous in-flow microwave processing of particulate pumpable foods, designed and implemented at RISE Agrifood and Bioscience, was evaluated for heat treatment of a particulate, viscous model food at high-temperature conditions at 2450 MHz. The microwave system has three consecutive cavities, one excited by the TM020 microwave mode that heats primarily in the centre of the tube, and two cavities fed by TM120 modes that heat primarily in the tube periphery. In this paper, combined TM020 and TM120 tubular microwave heating is evaluated as an alternative to high-temperature short-time (HTST) processing for a high-concentrated particulate model product. Rapidness in heating of the product was evaluated after tubular microwave heating for different time-temperature conditions, corresponding to the required microbiological inactivation for a model product intended for storage at ambient conditions. Moreover, the effects on product quality of the microwave heated model soup were investigated in terms of texture, piece integrity and colour. Microstructural analysis was used to gain an understanding of the effects of heating at a microscopic scale. It was found that the microwave-assisted HTST system results in large process flexibility. Additionally, it offers advantages in product quality in terms of piece integrity and texture.

Place, publisher, year, edition, pages
2017.
Keywords [en]
continuous process, heat rapidness, high-concentration large particulates, high-temperature short-time (HTST), Microwave in-flow heating, microwave-assisted HTST system, particulate foods, preservation, pumpable foods, tubular heating, Food storage, Heating, Microwave heating, Microwave tubes, Microwaves, Quality control, Wood preservation, High temperature, Microwave assisted, Thermal processing (foods)
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:ri:diva-32817DOI: 10.1080/08327823.2017.1388942Scopus ID: 2-s2.0-85033664975OAI: oai:DiVA.org:ri-32817DiVA, id: diva2:1161775
Available from: 2017-12-01 Created: 2017-12-01 Last updated: 2017-12-13Bibliographically approved

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