Hydraulic fractionation of conventional water quality constituents in municipal dry- and wet-weather flow samples

Author:

Exall K.1,Marsalek J.1,Krishnappan B. G.1

Affiliation:

1. Environment Canada, Water Science and Technology Directorate, 867 Lakeshore Road, Burlington, Ontario L7R 4A6, Canada E-mail: jiri.marsalek@ec.gc.ca; bommanna.krishnappan@ec.gc.ca

Abstract

The effective design of treatment processes for combined sewer overflows (CSOs) requires understanding of the CSO characteristics and treatability. Environment Canada partnered with four municipalities to evaluate water quality and treatability of wet- and dry-weather flows at local sewage or CSO treatment facilities. Chemical characterization of the samples indicates that the municipal sewage at all of the sites is of relatively weak strength, with several differences between the water quality data for dry-weather and wet-weather flows (assumed to represent CSOs). Hydraulic separation of constituents with an elutriation apparatus illustrated the removals that can be expected with conventional settling techniques and differences in settling of various constituents.

Publisher

IWA Publishing

Subject

Water Science and Technology,Environmental Engineering

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