Microbial decontamination of chicken using atmospheric plasma bubbles
Author(s)
Mai-Prochnow, Anne
Alam, David
Zhou, Renwu
Zhang, Tianqi
Ostrikov, Kostya Ken
Cullen, Patrick J
Griffith University Author(s)
Year published
2020
Metadata
Show full item recordAbstract
In this study, we demonstrate that atmospheric air plasma bubbles are an effective, energy-efficient, residue-free alternative to current decontamination techniques. Five to fifteen minutes of plasma-bubble treatments of inoculated chicken skin led to a significant reduction in colony-forming units (CFUs). We show that the activation efficiency is dependent on the plasma discharge frequency, with a higher one (2,000 Hz) leading to a higher CFU reduction (1.4 log) as compared with a lower (0.3 log) reduction at 1,000 Hz. Scanning electron microscopy pictures of treated bacteria reveal damage to the cells. An evaluation of the ...
View more >In this study, we demonstrate that atmospheric air plasma bubbles are an effective, energy-efficient, residue-free alternative to current decontamination techniques. Five to fifteen minutes of plasma-bubble treatments of inoculated chicken skin led to a significant reduction in colony-forming units (CFUs). We show that the activation efficiency is dependent on the plasma discharge frequency, with a higher one (2,000 Hz) leading to a higher CFU reduction (1.4 log) as compared with a lower (0.3 log) reduction at 1,000 Hz. Scanning electron microscopy pictures of treated bacteria reveal damage to the cells. An evaluation of the physicochemical properties of the generated plasma-activated water revealed an increase in conductivity and in ozone, nitrite, nitrate, hydroxyl, and peroxide concentrations with higher frequencies, all contributing to the observed antimicrobial effect.
View less >
View more >In this study, we demonstrate that atmospheric air plasma bubbles are an effective, energy-efficient, residue-free alternative to current decontamination techniques. Five to fifteen minutes of plasma-bubble treatments of inoculated chicken skin led to a significant reduction in colony-forming units (CFUs). We show that the activation efficiency is dependent on the plasma discharge frequency, with a higher one (2,000 Hz) leading to a higher CFU reduction (1.4 log) as compared with a lower (0.3 log) reduction at 1,000 Hz. Scanning electron microscopy pictures of treated bacteria reveal damage to the cells. An evaluation of the physicochemical properties of the generated plasma-activated water revealed an increase in conductivity and in ozone, nitrite, nitrate, hydroxyl, and peroxide concentrations with higher frequencies, all contributing to the observed antimicrobial effect.
View less >
Journal Title
Plasma Processes and Polymers
Note
This publication has been entered as an advanced online version in Griffith Research Online.
Subject
Atomic, molecular and optical physics
Nuclear and plasma physics
Particle and high energy physics
Physical chemistry
Materials engineering
Science & Technology
Physical Sciences
Physics, Applied
Physics, Fluids & Plasmas
Physics, Condensed Matter