Abstract
The influence of different doses of aluminium sulphate and polyaluminium chlorides when cleaning a thin and a thick sewage on the residual turbidity, concentrations of TOC, ortho-P, non-ortho-P, SS, and alkalinity and sludge volume produced was studied.
Both the alkalinity consumed and the amount of ortho-phosphate precipitated decreased with increasing basicity of the coagulant. At low coagulant doses no or little alkalinity was consumed. When the coagulants were added above a threshold concentration the alkalinity consumed as well as the amount of sludge produced increased strongly with the dose used.
When the thick water was cleaned to a constant phosphorus concentration the type of coagulant giving lowest sludge volume depended on the amount of phosphorus removed. At high removal rates the lowest basicity coagulants gave the lowest sludge volume. When the residual P concentration was 1.5 mg/1 the coagulant with OH/A1 of 1.1 gave the lowest sludge volume.
When waters were cleaned to a constant turbidity the sludge volume decreased somewhat with increasing basicity of the coagulant.
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.
References
Bottéro, J.Y., Poirier, J.E., Fiessinger, F.: Study of Partially Neutralized Aqueous Aluminium Chloride Solutions: Identification of Aluminium Species and Relation Between the Composition of the Solutions and Their Efficiency as a Coagulant. Prog. Wat. Tech. Toronto 12 (1980) 601–612.
Bottéro, J.Y., Tchoubar, D., Cases, J.M., Fripiat, J.J., Fiessinger, F.: New Development in Knowledge of Aluminum Colloids, Interfacial Phenomena. In: Biotechnology and Materials Processing, Ed. by Y. Attia, B.M. Moudgil, and S. Chander. Elsevier Science Publisher, 1988, pp.459-479.
Bottéro, J.Y., Bersillon, J.L.: Aluminum and Iron (III) Chemistry Some Implications for Organic Substance Removal. Adv. Chem. Ser., Aquatic Humic Substances 219 (1989) Chap. 26, pp. 425–442.
Brosset, C., Biedermann G., Sillén, L.G.: Studies of the Hydrolysis of Metal Ions; XI. The Aluminium Ion. Acta Chem. Scand. 8 (1954) 1917–1926
Fiessinger, F., Bersillon, J.L.: Prépolymérisation de l’hydroxyde d’aluminium pour la coagulation des eaux. CEBEDEAU-BECEWA 399 (1977) 52–68
Ødegaard, H., Fettig, J., Ratnaweera, H.C.: Coagulation with Prepolymerized Metal Salts. In: Chemical Water and Wastewater Treatment, H.H. Hahn and R. Klute (Eds.). Springer, Berlin Heidelberg New York 1990, pp. 189–220.
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
Gillberg, L. (1994). Influence of the Basicity of Polyaluminium Chlorides When Cleaning Municipal Wastewater. 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_4
Download citation
DOI: https://doi.org/10.1007/978-3-642-79110-9_4
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-79112-3
Online ISBN: 978-3-642-79110-9
eBook Packages: Springer Book Archive