The application of settling velocity as a parameter for characterising wastewater solids

Hedges, Peter D.; Becker, Fiona A.; Smisson, Robert P.M.

doi:10.1016/s0273-1223(97)00754-3

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…Data relative to the settling velocity of stormwater TSS have been acquired over the past fifteen years or so (Chebbo & Bachoc, 1992;Hedges et al 1998;Michelbach & Wö hrle, 1992;Pisano, 1996). The databases available however remain limited in scope when compared with the variability in phenomena from one rainfall event to another and from one measurement site to another.…”

Section: Introductionmentioning

confidence: 99%

Settling velocity of particulate pollutants from combined sewer wet weather discharges

Gromaire

Kafi-Benyahia²,

Gaspéri

et al. 2008

Water Science and Technology

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Settling velocities of TSS and of particulate pollutants (COP, PDCO, PTKN, PCu, PPb, PZn, PPAH) measured on a wide range of wet weather flow (WWF) samples collected at different levels of the Parisian combined sewer system are reported. The recorded V30 (0.01 to 0.1 mm s(-1)) and V50 (0.09 to 0.6 mm s(-1)) values exceed by a factor 10 those of dry weather sewage and also exceed the values measured for pavement runoff. These values lie however often below the 0.28 mm s(-1) reference value considered in France for the design of WWF settling facilities. A decrease in settleability is observed between a small upstream catchment and larger scaled downstream catchments. The settling behaviour of particulate pollutants varies depending on the considered parameter and can differ significantly from the TSS behaviour, due to a non homogeneous distribution of micropolluants over the different classes of particles. PZn and PTKN appear far less settleable than TSS, whereas PPAH show higher settleability.

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Section: Introductionmentioning

confidence: 99%

Settling velocity of particulate pollutants from combined sewer wet weather discharges

Gromaire

Kafi-Benyahia²,

Gaspéri

et al. 2008

Water Science and Technology

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“…Samples are then withdrawn from the bottom of the column at timed intervals(Michelbach & Wö hrle 1992) Chebbo & Bachoc (1992). addressed a similar issue for urban wet weather flows in two catchments, and with a mean settling period of 13 h, noted the following removals of various constituents: TSS -86%; COD -82%; BOD 5 -80%; Pb-74%; hydrocarbons 2 69%; and TKN-60% Hedges et al (1998). used the Aston settling column to characterize wastewater solids by settling velocity.…”

mentioning

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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Settling velocity characterization of aquacultural solids

Wong

Piedrahita

2000

Aquacultural Engineering

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The application of settling velocity as a parameter for characterising wastewater solids

Cited by 6 publications

References 3 publications

Settling velocity of particulate pollutants from combined sewer wet weather discharges

Settling velocity of particulate pollutants from combined sewer wet weather discharges

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

Settling velocity characterization of aquacultural solids

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