Microbial Decontamination of Dishwashing Tools by Corona Discharge Plasma JetMicrobial Decontamination of Dishwashing Tools by Corona Discharge Plasma Jet
- Other Titles
- Microbial Decontamination of Dishwashing Tools by Corona Discharge Plasma Jet
- Authors
- 김민수; 이태훈; Pradeep Puligundla; 목철균
- Issue Date
- Nov-2020
- Publisher
- 한국산업식품공학회
- Keywords
- corona discharge plasma; dishwashing tool; decontamination; kinetic modeling
- Citation
- 산업식품공학, v.24, no.4, pp.225 - 229
- Journal Title
- 산업식품공학
- Volume
- 24
- Number
- 4
- Start Page
- 225
- End Page
- 229
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/79678
- ISSN
- 1226-4768
- Abstract
- Dishwashing tools such as sponges, scourers, and dishcloths are known to harbor dense and diverse microbial communities, including pathogenic bacteria. In this study, the potential of corona discharge plasma jet (CDPJ) as a disinfectant was tested to improve the hygienic quality of dishwashing tools. For the simulation of microbial contamination, selective pathogenic bacteria (Escherichia coli O157:H7, Staphylococcus aureus, and Pseudomonas putida) were inoculated on selected dishwashing tools (dishcloth, sponge, and scourer) at concentrations of 6.55 to 8.77 log CFU/cm 2 . CDPJ generated at 20 kV voltage and 1.5A current was used for decontamination, whereas a sample-to-electrode distance of 25 mm was maintained during the treatment. Following CDPJ treatment for 5 min, the viable counts of E. coli O157:H7, S. aureus, and P. putida were reduced by 4.30-4.56, 3.71-4.78, and 3.50-3.83 log, respectively. The rates of inactivation were varied among the pathogens, decreasing in the order E. coli O157:H7 > S. aureus > P. putida. Among tested kinetic models, namely log-linear, log-linear with shoulder, and Weibull models, the log-linear with shoulder model was found to be the most suitable model to explain the CDPJ inactivation of the pathogens. In conclusion, CDPJ can be used as a potential sanitizing agent for dishwashing tools.
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