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Article dans une revue

Settling velocity of particulate pollutants from combined sewer wet weather discharges.

Abstract : 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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Soumis le : lundi 5 mars 2012 - 11:55:50
Dernière modification le : vendredi 5 août 2022 - 14:38:11



Marie-Christine Gromaire, M. Kafi-Benyahia, Johnny Gasperi, M. Saad, R. Moilleron, et al.. Settling velocity of particulate pollutants from combined sewer wet weather discharges.. Water Science and Technology, IWA Publishing, 2008, 58 (12), pp.2453-65. ⟨10.2166/wst.2008.835⟩. ⟨hal-00676414⟩



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