title: Modelling pathogen fate in stormwaters by a particle-pathogen interaction model using population balances.
abstract: Stormwater is polluted by various contaminants affecting the quality of receiving water bodies. Pathogens are one of these contaminants, which have a critical effect on water use in rivers. Increasing the retention time of water in stormwater basins can lead to reduced loads of pathogens released to the rivers. In this paper a model describing the behaviour of pathogens in stormwater basins is presented including different fate processes such as decay, adsorption/desorption, settling and solar disinfection. By considering the settling velocity distribution of particles and a layered approach, this model is able to create a light intensity, and particle and pathogen concentration profile along the water depth in the basin. A strong effect of solar disinfection is discerned. The model has been used to evaluate pathogen removal efficiencies in stormwater basins. It includes a population of particle classes characterized by a distribution of settling velocities in order to be able to reproduce stormwater quality and treatment in a realistic way.
authors.affiliation: Département de génie civil et de génie des eaux, Université Laval, 1065 av. de la Médecine, Québec, Qc, Canada.
authors.forename: L
authors.initials: L
authors.lastname: Vergeynst
authors.forename: B
authors.initials: B
authors.lastname: Vallet
authors.forename: P A
authors.initials: PA
authors.lastname: Vanrolleghem
mesh_terms: D003198:Computer Simulation; D055867:Cyclonic Storms; D004926:Escherichia coli / Q000502:physiology; D008954:Models, Biological; D052638:Particulate Matter / Q000737:chemistry*; D014871:Water Microbiology; D014876:Water Pollution / Q000032:analysis*
chemical_list: D052638:Particulate Matter