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1 June 2022 Energy density effects on disinfection of gram-negative organisms using a portable UV disinfection unit
Sungho Shin, Brianna Dowden, Iyll-Joon Doh, Xi Wu, Bartek Rajwa, Euiwon Bae, J. Paul Robinson
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Proceedings Volume 12120, Sensing for Agriculture and Food Quality and Safety XIV; 121200D (2022) https://doi.org/10.1117/12.2623328
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States
Abstract
Rapid detection and disinfection of microbial contamination is an ongoing concern across various food processing industries. Numerous methods exist for detection, including nucleic acid-based, fluorescence microscopy, and immunological-based tests. There is an emerging interest in using optical techniques to perform detection and disinfection simultaneously. This study reports on experimental results of energy density effects on disinfection of gram-negative organisms using a commercially available portable device. Three different gram-negative organisms were cultured and diluted over a four-log range. Samples of different concentrations were plated and exposed to UVC with increasing energy densities. A summary of the disinfection rate is presented. We identified an appropriate energy density condition that was required depending upon the concentration and type of microorganisms. The results showed that the tested portable device could serve be a valuable alternative for in-field screening and disinfection.
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Sungho Shin, Brianna Dowden, Iyll-Joon Doh, Xi Wu, Bartek Rajwa, Euiwon Bae, and J. Paul Robinson "Energy density effects on disinfection of gram-negative organisms using a portable UV disinfection unit", Proc. SPIE 12120, Sensing for Agriculture and Food Quality and Safety XIV, 121200D (1 June 2022); https://doi.org/10.1117/12.2623328
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KEYWORDS
Organisms
Ultraviolet radiation
Agriculture
Bacteria
Pathogens
Optical sensors
Safety
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