Publications

Detailed Information

Fundamental characteristics of deep-UV light-emitting diodes and their application to control foodborne pathogens

Cited 82 time in Web of Science Cited 95 time in Scopus
Authors

Shin, Joo-Yeon; Kim, Soo-Ji; Kim, Do-Kyun; Kang, Dong-Hyun

Issue Date
2016-01
Publisher
American Society for Microbiology
Citation
Applied and Environmental Microbiology, Vol.82 No.1, pp.2-10
Abstract
Low-pressure mercury UV (LP-UV) lamps have long been used for bacterial inactivation, but due to certain disadvantages, such as the possibility of mercury leakage, deep-UV-C light-emitting diodes (DUV-LEDs) for disinfection have recently been of great interest as an alternative. Therefore, in this study, we examined the basic spectral properties of DUV-LEDs and the effects of UV-C irradiation for inactivating foodborne pathogens, including Escherichia coli O157:H7, Salmonella enterica serovar Typhimurium, and Listeria monocytogenes, on solid media, as well as in water. As the temperature increased, DUV-LED light intensity decreased slightly, whereas LP-UV lamps showed increasing intensity until they reached a peak at around 30 degrees C. As the irradiation dosage and temperature increased, E.coli O157: H7 and S. Typhimurium experienced 5- to 6-log-unit reductions. L. monocytogenes was reduced by over 5 log units at a dose of 1.67 mJ/cm(2). At 90% relative humidity (RH), only E. coli O157:H7 experienced inactivation significantly greater than at 30 and 60% RH. In a water treatment study involving a continuous system, 6.38-, 5.81-, and 3.47-log-unit reductions were achieved in E. coli O157:H7, S. Typhimurium, and L. monocytogenes, respectively, at 0.5 liter per minute (LPM) and 200 mW output power. The results of this study suggest that the use of DUV-LEDs may compensate for the drawbacks of using LP-UV lamps to inactivate foodborne pathogens.
ISSN
0099-2240
URI
https://hdl.handle.net/10371/201157
DOI
https://doi.org/10.1128/AEM.01186-15
Files in This Item:
There are no files associated with this item.
Appears in Collections:

Related Researcher

  • College of Human Ecology
  • Department of Food and Nutrition
Research Area Food Safety, UV LED, Water Disinfection

Altmetrics

Item View & Download Count

  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Share