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

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 tr...

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Bibliographic Details
Published in:Water science and technology 2009-01, Vol.59 (6), p.1159-1167
Main Authors: Exall, K, Marsalek, J, Krishnappan, B G
Format: Article
Language:English
Subjects:
Combined sewer overflows
Constituents
Elutriation
Fractionation
Freshwater
Municipal wastes
Municipal wastewater
Municipalities
Pressure
Settling
Sewage
Sewage disposal
Water - analysis
Water - chemistry
Water quality
Weather
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Summary: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.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2009.101