Special Issue for the 13th IWA International Specialist Conference

Mortality rates of pathogen indicator microorganisms discharged from pointand non-point sources in an urban area


Geonha Kim , Jin Hur

DOI:

Received September 22, 2009,Revised January 11, 2010, Accepted , Available online

Volume 22,2010,Pages 929-933

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This research measured the mortality rates of pathogen indicator microorganisms discharged from various point and non-point sources in an urban area.Water samples were collected from a domestic sewer, a combined sewer overflow, the e uent of a wastewater treatment plant, and an urban river. Mortality rates of indicator microorganisms in sediment of an urban river were also measured. Mortality rates of indicator microorganisms in domestic sewage, estimated by assuming first order kinetics at 20°C were 0.197 day??1, 0.234 day??1, 0.258 day??1 and 0.276 day??1 for total coliform, fecal coliform, Escherichia coli, and fecal streptococci, respectively. E ects of temperature, sunlight irradiation and settlement on the mortality rate were measured. Results of this research can be used as input data for water quality modeling or can be used as design factors for treatment facilities.

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