| The aim of disinfection is to decrease the risk of transmission of waterborne diseases. The disinfection treatment's efficiency is calculated by the dose concept (CT) since it is not possible to measure pathogen inactivation due to their low concentrations in treated water.;The general objective of this project is to validate the CT values of the ozone contactors of the DesBaillets water treatment plant (Montreal, QC) by means of a biodosimetric technique. That approach is currently used to calculate the dose delivered by full-scale UV reactors and allows for a direct measure of the disinfection system performance. The use of aerobic spores has been suggested since they are found in high concentrations in surface waters, resistant to disinfection, linearly inactivated and detected by reproducible techniques. Since spores concentrations are generally low in treated water, their analysis by membrane filtration then cellular culture with routine volumes does not give precise data about their inactivation by disinfection. (Abstract shortened by UMI.). |
