Abstract
Biology does not afford treatment of CSO’s (Combined Sewer Overflow) waters under fair technical conditions. Due to limited upflow velocities during the settling phase, the usual physico-chemical processes do not afford treatment of such high flow rates under fair economic conditions.
The ACHFLO process, using recycled microsand as a ballast to increase the settling speed of flocculated particles, overcomes this economic problem through lowering by a factor of 10 (approx) the lamellar area required to treat a given water flow.
Removal of 80% of TSS, 60% of BOD, 15% of NTK and 80% of P is achieved with a consumption of about 60 g FeCl3, 0.8 gpolyelectrolyte and 3 g of microsand per m3 of CSO’s water, within a total area of only 0.03 m2/m3 influent per hour.
Plant start-up is achieved within about 15 minutes.
Microsand weighted flocculation appears to be a good way for disposing of the COS’s water from large and medium urban catchments economically.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Bibliography
Argaman, Y.A. Kaufman, W.J.: Turbulence and Flocculation. J. Div. Sank. Eng., Pro. Am. Soc. Civil Eng. 96 (SA2) (1979) 223–241.
Argaman, Y.A.: Pilot Plant Studies of Flocculation. JAWWA 63(12) (1971) 775–777.
Bourdon, F., Jarosz, J., Ottavioli, J., Mallen, A.: Optimizing Operating and Control of Physico-Chemical Lamella Settling. IAWPRC — IWS A Specialized Conference — Coagulation, Flocculation, Filtration, Sedimentation and Flotation in Water and Wastewater Treatment, Jönköping, Sweden, April 24–26, 1990.
Chebbo, G., Saget, A., Bachoc, A.: Elements pour le dimensionnement des ouvrages de dépollution des rejets urbains par temps de pluie. AFITE la pollution par les eaux pluviales Qualité-Collecte-Solution d’avenir, Lyon, 4–5 nov. 1992, pp. 17-26.
De Dianous, F., Pujol, E., Druoton, J.C.: Industrial Application of Weighted Flocculation Development of the Actiflo® Clarification. In: Chemical Water and Wastewater Treatment, H.H. Hahn and R. Klute (Eds.). Springer, Berlin Heidelberg New York 1990, pp.
Guibelin, E.: Le procédé Actiflo — Décantation lamellaire par flocs lestés des eaux de surface. Tribune de l’eau, Nov./Déc. 1990 (special Pollutec) pp. 3-6.
Janssens, J.G., Buekens, A.: Theoretical Analysis and Practical Application of the Kinetic Model for Flocculation in the Interpretation of Jar Tests. Aqua 2 (1987) 91-97.
Morissey, S.P., Harlemans, D.R.F.: Retrofitting Conventional Primary Treatment Plants for Chemically Enhanced Primary Treatment in the USA. In: Chemical Water and Wastewater Treatment II, R. Klute and H.H. Hahn (Eds.). Springer, Berlin Heildelberg New York 1992, pp. 401–416.
Ostrowski, M.: Storm Water Treatment in the Federal Republic of Germany. AFITE la Pollution par les eaux pluviales Qualité — Collecte — Solutions d’Avenir, Lyon, 4–5 Nov. 1992, pp. 141-149.
Sibony, J.: Clarification with Microsand Seeding, a State of the Art. Water Research 15 (1992) pp. 1281-1290, 1981.
Tabuchi, J.P.: Les impacts des rejets urbains de temps de pluie. Agence de l’Eau Scine Normandie, 24 Juin 1991
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1994 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Guibelin, E., Delsalle, F., Binot, P. (1994). High Speed Settling of Stormwater with Microsand. In: Klute, R., Hahn, H.H. (eds) Chemical Water and Wastewater Treatment III. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-79110-9_23
Download citation
DOI: https://doi.org/10.1007/978-3-642-79110-9_23
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-79112-3
Online ISBN: 978-3-642-79110-9
eBook Packages: Springer Book Archive