Record Display for the EPA National Library Catalog


Main Title Ultraviolet Disinfection of Water for Small Water Supplies.
Author Carlson, D. A. ; Seabloom, R. W. ; DeWalle, F. B. ; Wetzler, T. F. ; Engeset, J. ;
CORP Author Washington Univ., Seattle.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
Year Published 1985
Report Number EPA/600/2-85/092;
Stock Number PB85-239960
Additional Subjects Ultraviolet radiation ; Disinfection ; Water supply ; Water treatment ; Giardia ; Sunlight ; Biocides ; Mercury lamps ; Exposure ; Photochemical reactions ; Giardia lamblia ; Water borne diseases ; Small communities
Library Call Number Additional Info Location Last
NTIS  PB85-239960 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 127p
In the study ultraviolet radiation was considered as an alternative means of disinfection of small drinking water supplies. A major impetus for the study was the large increase in waterborne disease episodes in the United States whose etiologic agent, Giardia lamblia, was found to be highly resistant to conventional chlorination. While the germicidal effect of sunlight has long been known, it has been found that artificial UV radiation with a wavelength of 253.7 nm, can be produced by low pressure mercury vapor lamps. The inactivation of microorganisms by UV radiation is based upon photochemical reactions in the DNA which result in errors in the coding system. Inactivation of microorganisms due to exposure to UV is proportional to the intensity multiplied by the time of exposure.