INACTIVATION OF PATHOGENIC BACTERIA USING PULSED UV-LIGHT AND ITS APPLICATION IN WATER DISINFECTION AND QUALITY CONTROL

The lethality of pulsed ultra-violet (UV) rich light for the inactivation of pathogenic bacteria has been investigated. A low pressure xenon filled flash lamps that produced UV intensities have been used. The pulsed operation of the system enable the release of electrical energy stored in the capaci...

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Main Author: M. K. Sharifi-Yazdi H. Darghahi
Format: Article
Language:English
Published: Tehran University of Medical Sciences 2006-09-01
Series:Acta Medica Iranica
Subjects:
Online Access:http://journals.tums.ac.ir/PdfMed.aspx?pdf_med=/upload_files/pdf/3228.pdf&manuscript_id=3228
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spelling doaj-0404133a08d14a86b06545e229d444692020-11-25T04:00:51ZengTehran University of Medical SciencesActa Medica Iranica0044-60252006-09-01445305309INACTIVATION OF PATHOGENIC BACTERIA USING PULSED UV-LIGHT AND ITS APPLICATION IN WATER DISINFECTION AND QUALITY CONTROLM. K. Sharifi-Yazdi H. DarghahiThe lethality of pulsed ultra-violet (UV) rich light for the inactivation of pathogenic bacteria has been investigated. A low pressure xenon filled flash lamps that produced UV intensities have been used. The pulsed operation of the system enable the release of electrical energy stored in the capacitor into the flash lamp within a short time and produces the high current and high peak power required for emitting the intense UV flash. The flash frequency was adjusted to one pulse per second. Several types of bacteria were investigated for their susceptibility to pulsed UV illumination. The treated bacterial populations were reduced and determined by direct viable counts. Among the tested bacteria Pseudomonas aeruginosa was the most susceptible to the pulsed UV- light with a 8 log10 cfu/ml reduction after 11 pulses, while the spores of Bacillus megaterium was the most resistant and only 4 log10 cfu/ml reduction achieved after 50 pulses of illumination. The results of this study demonstrated that pulsed UV- light technology could be used as an effective method for the inactivation, of pathogenic bacteria in different environments such as drinking water. http://journals.tums.ac.ir/PdfMed.aspx?pdf_med=/upload_files/pdf/3228.pdf&manuscript_id=3228UV inactivationflashlamp
collection DOAJ
language English
format Article
sources DOAJ
author M. K. Sharifi-Yazdi H. Darghahi
spellingShingle M. K. Sharifi-Yazdi H. Darghahi
INACTIVATION OF PATHOGENIC BACTERIA USING PULSED UV-LIGHT AND ITS APPLICATION IN WATER DISINFECTION AND QUALITY CONTROL
Acta Medica Iranica
UV inactivation
flashlamp
author_facet M. K. Sharifi-Yazdi H. Darghahi
author_sort M. K. Sharifi-Yazdi H. Darghahi
title INACTIVATION OF PATHOGENIC BACTERIA USING PULSED UV-LIGHT AND ITS APPLICATION IN WATER DISINFECTION AND QUALITY CONTROL
title_short INACTIVATION OF PATHOGENIC BACTERIA USING PULSED UV-LIGHT AND ITS APPLICATION IN WATER DISINFECTION AND QUALITY CONTROL
title_full INACTIVATION OF PATHOGENIC BACTERIA USING PULSED UV-LIGHT AND ITS APPLICATION IN WATER DISINFECTION AND QUALITY CONTROL
title_fullStr INACTIVATION OF PATHOGENIC BACTERIA USING PULSED UV-LIGHT AND ITS APPLICATION IN WATER DISINFECTION AND QUALITY CONTROL
title_full_unstemmed INACTIVATION OF PATHOGENIC BACTERIA USING PULSED UV-LIGHT AND ITS APPLICATION IN WATER DISINFECTION AND QUALITY CONTROL
title_sort inactivation of pathogenic bacteria using pulsed uv-light and its application in water disinfection and quality control
publisher Tehran University of Medical Sciences
series Acta Medica Iranica
issn 0044-6025
publishDate 2006-09-01
description The lethality of pulsed ultra-violet (UV) rich light for the inactivation of pathogenic bacteria has been investigated. A low pressure xenon filled flash lamps that produced UV intensities have been used. The pulsed operation of the system enable the release of electrical energy stored in the capacitor into the flash lamp within a short time and produces the high current and high peak power required for emitting the intense UV flash. The flash frequency was adjusted to one pulse per second. Several types of bacteria were investigated for their susceptibility to pulsed UV illumination. The treated bacterial populations were reduced and determined by direct viable counts. Among the tested bacteria Pseudomonas aeruginosa was the most susceptible to the pulsed UV- light with a 8 log10 cfu/ml reduction after 11 pulses, while the spores of Bacillus megaterium was the most resistant and only 4 log10 cfu/ml reduction achieved after 50 pulses of illumination. The results of this study demonstrated that pulsed UV- light technology could be used as an effective method for the inactivation, of pathogenic bacteria in different environments such as drinking water.
topic UV inactivation
flashlamp
url http://journals.tums.ac.ir/PdfMed.aspx?pdf_med=/upload_files/pdf/3228.pdf&manuscript_id=3228
work_keys_str_mv AT mksharifiyazdihdarghahi inactivationofpathogenicbacteriausingpulseduvlightanditsapplicationinwaterdisinfectionandqualitycontrol
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