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Preliminary Evaluation of Polyferric Sulphate As a Coagulant for Surface Water Treatment

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Chemical Water and Wastewater Treatment III

Abstract

This paper is concerned with the performance of a relatively new form of Fe(III) coagulant, Polyferric Sulphate (PFS), which contains a range of pre-formed Fe(III) hydrolysis species with both a high positive charge and medium and large molecular weights. Preliminary laboratory and pilot-plant experiments were undertaken to evaluate the performance of PFS, in comparison with conventional coagulants such as ferric sulphate (FS), for the coagulation of surface waters containing substantial concentrations of algae and/or colour, and natural organic matter.

The performance of PFS was found to be consistently superior to other coagulants in terms of the removal of turbidity, algae, colour, UV absorbance and TOC, THMFP and the residual concentration of coagulants. In addition, sludge production and headloss development in the subsequent sand filter process were both lower with PFS than FS, and the influence of low water temperatures (e.g. 4°C) on the coagulation performance with PFS was less than that with FS and aluminium sulphate (AS). The reasons for the superior performance of PFS and the effects of pre-ozonation and low water temperatures on coagulation behaviour are discussed in the paper.

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Author information

Authors and Affiliations

  1. Environmental and Water Resource Engineering, Department of Civil Engineering, Imperial College, London, SW7 2BU, UK

    Jia-Qian Jiang & Nigel J. D. Graham

  2. Anglian Water Services Ltd., Chivers Way, Histon, Cambridge, CB4 427, UK

    Clive Harward

Authors
  1. Jia-Qian Jiang
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  2. Nigel J. D. Graham
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  3. Clive Harward
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Editors and Affiliations

  1. Institut WAR Wasserversorgung · Abwassertechnik Abfalltechnik · Umwelt- und Raumplanung, Technische Hochschule Darmstadt, Petersenstraße 13, D-64287, Darmstadt, Germany

    Rudolf Klute

  2. Institut für Siedlungswasserwirtschaft Am Fasanengarten, Universität Karlsruhe, D-76128, Karlsruhe, Germany

    Hermann H. Hahn

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© 1994 Springer-Verlag Berlin Heidelberg

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Jiang, JQ., Graham, N.J.D., Harward, C. (1994). Preliminary Evaluation of Polyferric Sulphate As a Coagulant for Surface Water Treatment. 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_6

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  • DOI: https://doi.org/10.1007/978-3-642-79110-9_6

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-79112-3

  • Online ISBN: 978-3-642-79110-9

  • eBook Packages: Springer Book Archive

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