Application of intense pulsed light – plasma – ultraviolet combined system on granular and powdered foods for microbial inactivation

Hee Jeong Hwang, Ji Yoon Lee, Sea C. Min, Myong Soo Chung

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The bactericidal effects of a self-designed device that combines intense pulsed light (IPL), plasma, and ultraviolet irradiation (UV) on granular and powdered foods, and the changes induced in the properties of the samples were studied. Samples were treated by combined IPL-plasma-UV system continuously. A maximum 1.33 ± 0.24-log reduction of microorganisms on sesame seeds were achieved using the combined system, while maximum 1.12 ± 0.18- and 0.59 ± 0.06-reductions were achieved using IPL-only and plasma-only systems, respectively. Using the combined system achieved maximum 0.41 ± 0.04- and 0.51 ± 0.05-log reductions of microorganisms on black pepper powder and red pepper powder, respectively, which have more holes, cracks, and crevices than sesame seeds. Significant changes in water activity, moisture content, and color were found in all samples due to drying caused by fast circulation or plasma treatment. So further research is needed to reduce the changes of the sample properties after the combined system.

Original languageEnglish
Article number114447
JournalLWT - Food Science and Technology
Volume174
DOIs
StatePublished - 15 Jan 2023

Bibliographical note

Publisher Copyright:
© 2023

Keywords

  • Granular and powdered foods
  • Intense pulsed light (IPL)
  • Microbial inactivation
  • Plasma
  • Ultraviolet irradiation

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