Factors influencing the antimicrobial efficacy of Dielectric Barrier Discharge (DBD) Atmospheric Cold Plasma (ACP) in food processing applications

Abstract

Atmospheric cold plasma (ACP) is an emerging technology in the food industry with a huge antimicrobial potential to improve safety and extend the shelf life of food products. Dielectric barrier discharge (DBD) is a popular approach for generating ACP. Thanks to the numerous advantages of DBD ACP, it is proving to be successful in a number of applications, including microbial decontamination of foods. The antimicrobial efficacy of DBD ACP is influenced by multiple factors. This review presents an overview of ACP sources, with an emphasis on DBD, and an analysis of their antimicrobial efficacy in foods in open atmosphere and in-package modes. Specifically, the influence of process, product, and microbiological factors influencing the antimicrobial efficacy of DBD ACP are critically reviewed. DBD ACP is a promising technology that can improve food safety with minimal impact on food quality under optimal conditions. Once the issues pertinent to scale-up of plasma sources are appropriately addressed, the DBD ACP technology will find wider adaptation in food industry.

Keywords:

• DBD
• atmospheric cold plasma
• food decontamination
• in-package treatment
• antimicrobial mechanisms

Disclosure statement

The authors declare that they do not have any conflict of interest.

Additional information

Funding

We acknowledge the funding support from Alberta Agriculture and Forestry, Alberta Innovates, Alberta Canola Producers Commission, and Natural Sciences and Engineering Research Council (grant nos. 2017F024R, 2018F180R; RGPIN-2017-05051, CRDPJ532306) for the funding support.