The synergistic effect of excimer and low-pressure mercury lamps on the disinfection of flowing water

I A Ramsay, J C Niedziela, I D Ogden

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Microorganisms in flowing water were disinfected by UV radiation from two excimer (excited dimer) lamps (emitting at 172 and 222 nm) in combination with two low-pressure mercury lamps (emitting at 254 nm). Synergies were investigated among the three types of radiation in the treatment of water spiked in turn with Escherichia coli, Listeria innocua, Shewanella putrefaciens, and spores of Bacillus subtilis and Bacillus cereus. Synergy was demonstrated between radiations at 222 and 254 nm in the treatment of E. coli, L. innocua, and S. putrefaciens, but Little or no synergy was observed in the treatment of B. subtilis and B. cereus. At maximum how rates (60 Liters/min), 5-log reductions in E. coli were achieved at 254 nm, although at 222 MI, less than 1-log reductions were observed. No bacterial kill was observed with 172-nm radiation alone, despite increasing exposure time by reducing flow rates to less than 3 Liters/min.

Original languageEnglish
Pages (from-to)1529-1533
Number of pages5
JournalJournal of Food Protection
Volume63
Publication statusPublished - 2000

Keywords

  • INACTIVATION
  • FOODS

Cite this

The synergistic effect of excimer and low-pressure mercury lamps on the disinfection of flowing water. / Ramsay, I A ; Niedziela, J C ; Ogden, I D .

In: Journal of Food Protection, Vol. 63, 2000, p. 1529-1533.

Research output: Contribution to journalArticle

@article{7a3b9ab7f1d846b2ab6da4c4f0de7d86,
title = "The synergistic effect of excimer and low-pressure mercury lamps on the disinfection of flowing water",
abstract = "Microorganisms in flowing water were disinfected by UV radiation from two excimer (excited dimer) lamps (emitting at 172 and 222 nm) in combination with two low-pressure mercury lamps (emitting at 254 nm). Synergies were investigated among the three types of radiation in the treatment of water spiked in turn with Escherichia coli, Listeria innocua, Shewanella putrefaciens, and spores of Bacillus subtilis and Bacillus cereus. Synergy was demonstrated between radiations at 222 and 254 nm in the treatment of E. coli, L. innocua, and S. putrefaciens, but Little or no synergy was observed in the treatment of B. subtilis and B. cereus. At maximum how rates (60 Liters/min), 5-log reductions in E. coli were achieved at 254 nm, although at 222 MI, less than 1-log reductions were observed. No bacterial kill was observed with 172-nm radiation alone, despite increasing exposure time by reducing flow rates to less than 3 Liters/min.",
keywords = "INACTIVATION, FOODS",
author = "Ramsay, {I A} and Niedziela, {J C} and Ogden, {I D}",
year = "2000",
language = "English",
volume = "63",
pages = "1529--1533",
journal = "Journal of Food Protection",
issn = "0362-028X",
publisher = "International Association for Food Protection",

}

TY - JOUR

T1 - The synergistic effect of excimer and low-pressure mercury lamps on the disinfection of flowing water

AU - Ramsay, I A

AU - Niedziela, J C

AU - Ogden, I D

PY - 2000

Y1 - 2000

N2 - Microorganisms in flowing water were disinfected by UV radiation from two excimer (excited dimer) lamps (emitting at 172 and 222 nm) in combination with two low-pressure mercury lamps (emitting at 254 nm). Synergies were investigated among the three types of radiation in the treatment of water spiked in turn with Escherichia coli, Listeria innocua, Shewanella putrefaciens, and spores of Bacillus subtilis and Bacillus cereus. Synergy was demonstrated between radiations at 222 and 254 nm in the treatment of E. coli, L. innocua, and S. putrefaciens, but Little or no synergy was observed in the treatment of B. subtilis and B. cereus. At maximum how rates (60 Liters/min), 5-log reductions in E. coli were achieved at 254 nm, although at 222 MI, less than 1-log reductions were observed. No bacterial kill was observed with 172-nm radiation alone, despite increasing exposure time by reducing flow rates to less than 3 Liters/min.

AB - Microorganisms in flowing water were disinfected by UV radiation from two excimer (excited dimer) lamps (emitting at 172 and 222 nm) in combination with two low-pressure mercury lamps (emitting at 254 nm). Synergies were investigated among the three types of radiation in the treatment of water spiked in turn with Escherichia coli, Listeria innocua, Shewanella putrefaciens, and spores of Bacillus subtilis and Bacillus cereus. Synergy was demonstrated between radiations at 222 and 254 nm in the treatment of E. coli, L. innocua, and S. putrefaciens, but Little or no synergy was observed in the treatment of B. subtilis and B. cereus. At maximum how rates (60 Liters/min), 5-log reductions in E. coli were achieved at 254 nm, although at 222 MI, less than 1-log reductions were observed. No bacterial kill was observed with 172-nm radiation alone, despite increasing exposure time by reducing flow rates to less than 3 Liters/min.

KW - INACTIVATION

KW - FOODS

M3 - Article

VL - 63

SP - 1529

EP - 1533

JO - Journal of Food Protection

JF - Journal of Food Protection

SN - 0362-028X

ER -