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Chemically Assisted Sedimentation in an Inclined Tube Clarifier

  • Steve Williams
  • Peter Pearce
  • Phil Marsh
Conference paper

Abstract

A demonstration scale inclined tube clarifier was tested at two wastewater treatment plants in Thames Water. The performance of the clarifier was evaluated without coagulant, with coagulant and with coagulant and flocculant. The coagulant improved the removal of suspended solids and BOD and the key parameters were the initial mixing of the coagulant, flocculation time and overflow rate. The volume of sludge produced from the clarifier increased broadly in line with the additional mass of solids removed. Addition of a flocculant to the coagulated wastewater improved the performance of the clarifier and produced an effluent with an average of 50 mg/l suspended solids and 60 mg/l BOD.

Keywords

Suspended Solid Overflow Rate Waste Activate Sludge Dose Point Sludge Production 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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    Marsh, P.: The Design and Development of the Thames Primary Lamella Separator. Paper presented to IWEM seminar: Lamella Technology. A state of the art review, 13th December 1995Google Scholar
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    Klute, R : Role of Mixing min Coagulation Processes. Paper presented to IChemE seminar: The water Industry and Mixing Technology, 7th October 1992Google Scholar
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    Chaudary, R., Shao, Y.J., Crosse, J., Soroushian, F.: Evaluation of Chemical Addition. Water Environmental and Technology 3 (1991) 66–71Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1996

Authors and Affiliations

  • Steve Williams
    • 1
  • Peter Pearce
    • 1
  • Phil Marsh
    • 1
  1. 1.Thames Water Utilities LtdReadingEngland

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