Case Study: Refinement of Hydraulic Operation of a Complex CSO Storage/Treatment Facility by Numerical and Physical Modeling

He, Cheng; Maršálek, Jiří; Rochfort, Quintin; Krishnappan, B. G.

doi:10.1061/(asce)0733-9429(2006)132:2(131)

Cited by 13 publications

(3 citation statements)

References 12 publications

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“…models (e.g., He et al 2006), and (c) the need to assess the removals for various overflow events producing different surface loading rates. Note that e.g., the above cited procedure F-5-5 stipulates the removal rate of 50% as an average value attained for at least 90% of total CSO flow during an average runoff season (OMOE, undated).…”

Section: Settleability Of Constituentsmentioning

confidence: 99%

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

Exall

Maršálek

Krishnappan

2009

Water Science and Technology

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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.

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Section: Settleability Of Constituentsmentioning

confidence: 99%

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

Exall

Maršálek

Krishnappan

2009

Water Science and Technology

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“…The hydraulic design of CSO settling tanks relies on empirical approaches providing input to computer modelling. Adamsson et al (2003), He et al (2006) and others conducted laboratory research using small-scale physical models to advance the understanding of settling processes and advance their modelling by computational fluid dynamics models. Nevertheless, serious challenges remain in scaling up model results to actual sedimentation tanks, because of complex facility geometries, unsteady flow hydrodynamics, and variable particle fluxes and characteristics.…”

Section: Introductionmentioning

confidence: 99%

Assessing Settleability of Dry and Wet Weather Flows in an Urban Area Serviced by Combined Sewers

Piro

Carbone

Tomei

2010

Water Air Soil Pollut

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Settleability of dry and wet weather flow samples from a combined sewer system was examined by settling column tests, in order to improve understanding of settling processes and obtain information for design of settling tanks. In fact, these tests mimic the actual settling processes and allow evaluating total suspended solids (TSS) removal by settling. Therefore, it is also possible to assess, indirectly, removals of other pollutants, such as heavy metals, which are generally transported by solid particles in sewage. Towards this end, dry and wet weather flow samples were collected in the Liguori Channel catchment and analyzed in the laboratory for Water Supply and Sewerage (Acquedotti e Fognature) of the University of Calabria for TSS concentrations according to the Standard Methods. The settleability study revealed that removals of TSS in dry weather samples (i.e., sanitary sewage) were greater than in wet weather samples (WW), using the same experimental procedures. In particular, 65% of TSS was removed in dry weather samples at a depth of 3 m for a detention time of 40 min; while in wet weather samples the comparable removal efficiency was less than 60%.

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“…For example Kofoed-Hansen et al (2000) utilized both numerical and physical models to study seiching in exposed new marina where the physical model was applied to investigate especially for incident wave conditions associated with strong wave breaking, where the numerical model was not yet feasible. He et al (2006) simulated the performance of a combined sewer overflow using physical and numerical models. The physical model was used to establish a verified numerical model of the facility for future work.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of wave propagation into a harbor using improved characteristic scheme

Triatmadja

2010

Journal of Hydro-environment Research

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Case Study: Refinement of Hydraulic Operation of a Complex CSO Storage/Treatment Facility by Numerical and Physical Modeling

Cited by 13 publications

References 12 publications

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

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

Assessing Settleability of Dry and Wet Weather Flows in an Urban Area Serviced by Combined Sewers

Numerical modeling of wave propagation into a harbor using improved characteristic scheme

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