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AWWA WQTC60558
- Effect of Wavelength on Efficiency of DNA Damage During UV Disinfection of E. coli
- Conference Proceeding by American Water Works Association, 11/15/2004
- Publisher: AWWA
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Inactivation of E. coli was investigated via standard plate culture assay and amolecular based assay that measured dimmer formation. Experiments wereperformed under radiation from conventional low and medium pressure ultraviolet (UV)sources as well as wavelength bands around 228 and 289 nm. Inactivation of E.coli was similar under LP and MP sources and the relative number of dimersformed per UV dose was similar. Inactivation was much slower under the otherwavelength bands tested but 228nm was more effective than 289 nm radiation.These results support the accepted action spectrum for E. coli and suggest thatfor inactivation of this bacteria there is no significant difference between LP andMP sources. Includes 6 references, table, figures.
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