Pulsed light technology for microbial inactivation

Endarko*, M. Maclean, I. V. Timoshkin, S. J. MacGregor, J. G. Anderson

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Pulsed ultraviolet-rich (PUV) light is a novel non-thermal high-peak power technology, which can achieve rapid inactivation of pathogenic and spoilage microorganisms. The aim of this study was to determine the effect of PUV-light for the inactivation of the bacterial species Staphylococcus epidermidis and the yeast species Saccharomyces cerevisiae whilst in liquid suspension. Results demonstrate that PUV-light exposure is highly microbicidal, with a 7-log 10 reduction of S. epidermidis being achieved after application of less than 10 pulses. S. cerevisiae was also inactivated, with 5-log10 and 7-log10 reductions being achieved after exposure to 10 and 75 pulses, respectively. This study also demonstrates that agitation of the sample during PUV exposure significantly enhances the inactivation rate of densely populated microbial suspensions.

Original languageEnglish
Title of host publicationProceedings of the 44th International Universities Power Engineering Conference, UPEC2009
Publication statusPublished - 2009
Externally publishedYes
Event44th International Universities Power Engineering Conference, UPEC2009 - Glasgow, United Kingdom
Duration: 1 Sept 20094 Sept 2009

Publication series

NameProceedings of the Universities Power Engineering Conference


Conference44th International Universities Power Engineering Conference, UPEC2009
Country/TerritoryUnited Kingdom


  • Flashlamp
  • High-peak power
  • Pathogenic bacteria
  • Pulsed ultraviolet
  • Sterilization


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