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Mixing for Coagulation: Organic Polymers, Static Mixers, and Modeling

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Chemical Water and Wastewater Treatment IV

Abstract

This paper is a summary of research on the role of mixing in the coagulation process. In particular, the optimal rapid mix G value and detention time were determined for coagulation using an organic, cationic polyelectrolyte. The optimal G value was in agreement with previous studies, but the optimal detention time was in seconds instead of several minutes. Studies on the use of static mixers are also summarized. Comparing the static mixer to a jar test for enhanced coagulation studies showed that the type of mixer is important in determining optimal coagulant doses for TOC removal. This conclusion has important implications for water treatment plants practicing enhanced coagulation. A computational fluid dynamics model of static mixers is also introduced that can provide detailed, quantitative information on the fluid flow and chemical dispersion in static mixers.

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Authors and Affiliations

  1. School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA

    Appiah Amirtharajah & S. Casey Jones

Authors
  1. Appiah Amirtharajah
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  2. S. Casey Jones
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Editors and Affiliations

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

    Hermann H. Hahn Ph. D.  & Erhard Hoffmann  & 

  2. Dept. of Hydraulic and Environmental Engineering, Norwegian University of Science and Technology, NTNU, S.P. Andersens vei 5, N-7034, Trondheim, Norway

    Hallvard Ødegaard (Faculty of Civil Engineering) (Faculty of Civil Engineering)

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© 1996 Springer-Verlag Berlin Heidelberg

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Amirtharajah, A., Jones, S.C. (1996). Mixing for Coagulation: Organic Polymers, Static Mixers, and Modeling. In: Hahn, H.H., Hoffmann, E., Ødegaard, H. (eds) Chemical Water and Wastewater Treatment IV. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-61196-4_1

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  • DOI: https://doi.org/10.1007/978-3-642-61196-4_1

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-64743-7

  • Online ISBN: 978-3-642-61196-4

  • eBook Packages: Springer Book Archive

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