Journal article
Microbial Inactivation by Non-equilibrium Short-Pulsed Atmospheric Pressure Dielectric Barrier Discharge (Cold Plasma): Numerical and Experimental Studies
FOOD ENGINEERING REVIEWS, v 13(1)
Mar 2021
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Microbial inactivation efficacy of plasma generated by a custom-made floating electrode dielectric barrier discharge (FE-DBD) or cold plasma at three different frequencies (1 kHz, 2 kHz, and 3.5 kHz) was experimentally evaluated for its inactivation of the pathogen surrogateEnterobacter aerogeneson a glass surface to obtain inactivation kinetics. COMSOL Multiphysics (R) was used to numerically simulate the amount and the distribution of reactive species within an FE-DBD system. Microbial inactivation kinetics was predicted using species concentrations and microbial inactivation rates from the literature and compared with experimental data. The results showed that the FE-DBD plasma treatment achieved a microbial reduction of 4.3 +/- 0.5 log CFU/surface at 3.5 kHz, 5.1 +/- 0.09 log CFU/surface at 2 kHz, and 5.1 +/- 0.05 log CFU/surface at 1 kHz in 2 min, 3 min, and 6 min, respectively. The predicted values were 4.02 log CFU/surface, 4.10 log CFU/surface, and 4.56 log CFU/surface at 1 kHz, 2 kHz, and 3.5 kHz, respectively. A maximum 1 log difference was observed between numerical predictions and the experimental results. The difference might be due to synergistic interactions between plasma species, UV component of FE-DBD plasma, and/or the electrical field effects, which could not be included in the numerical simulation.
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Details
- Title
- Microbial Inactivation by Non-equilibrium Short-Pulsed Atmospheric Pressure Dielectric Barrier Discharge (Cold Plasma): Numerical and Experimental Studies
- Publication Details
- FOOD ENGINEERING REVIEWS, v 13(1)
- Publisher
- SPRINGER; NEW YORK
- Number of pages
- 11
- Grant note
- This study is financially supported by the Turkish Ministry of Education. Partial funding is provided by the New Jersey Agricultural Experiment Station.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Drexel University
- Web of Science ID
- WOS:000580495300001
- Scopus ID
- 2-s2.0-85092915785
- Other Identifier
- 991021860760404721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Food Science & Technology