Journal
WATER RESEARCH
Volume 34, Issue 16, Pages 4007-4013Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0043-1354(00)00172-X
Keywords
ultraviolet (UV) disinfection; medium pressure; germicidal efficiency; germicidal intensity; germicidal dose
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The responses of three species of coliform bacteria (Citrobacter diversus, Citrobacter freundii and Klebsiella pneumoniae) and the bacteriophage (virus) phi X-174 to three wavelengths of UV light (254, 280 and 301 nm) were measured. The values of germicidal efficiency at 280 nm determined for each of the microorganisms were not significantly different. At 301 nm, the values of germicidal efficiency were significantly different, but ail values were too small (< 0.06) to warrant consideration in the modeling of the germicidal intensity delivered by a medium pressure UV system. The data from this study provide some evidence that the values of germicidal efficiency determined for one species of bacteria or virus may be used to represent the relative responses of all bacteria and viruses to medium pressure UV irradiation. (C) 2000 Elsevier Science Ltd. All rights reserved.
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