Record Display for the EPA National Library Catalog


Main Title Microbial Resistance to Disinfectants: Mechanisms and Significance.
Author Hoff, J. C. ; Akin, E. W. ;
CORP Author Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
Year Published 1985
Report Number EPA/600/D-85/215;
Stock Number PB86-108297
Additional Subjects Disinfectants ; Potable water ; Microorganisms ; Bacteria ; Viruses ; Protozoa ; Resistance ; Effectiveness ; Drinking water ; Pathogens
Library Call Number Additional Info Location Last
NTIS  PB86-108297 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 33p
Drinking water disinfection provides the final barrier to waterborne transmission of a wide variety of potentially waterborne infectious agents including pathogenic bacteria, viruses, and protozoa. These agents differ greatly in their innate resistance to inactivation by disinfectants, ranging from extremely sensitive bacterial agents to highly resistant protozoan cysts. The close similarity between microorganism inactivation rates and the kinetics of chemical reactions has long been recognized. Ideally, under carefully controlled conditions, microorganism inactivation rates simulate first order chemical reaction rates making it possible to predict the effectiveness of disinfection under specific conditions. In practice, changes in relative resistance and deviations from first order kinetics are caused by a number of factors including microbial growth conditions, aggregation, and association with particulate materials. The net effect of all of these factors is reduction in the effectiveness and predictability of disinfection processes.