Thermal hydrolysis of secondary scum for control of biological foam

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Outline
  • Extent of Gordona Foaming Problem
  • Scope
  • Cambi Process
  • Methods & Materials
  • Results
  • Cost Comparison
  • Conclusions, Future Concerns

Extent of Gordona Foaming Problem

  • Gordona (aka Nocardia) is the predominant organism in 66% of 114 USA treatment plants (Pitt and Jenkins,1990).
  • San Francisco experiences operating problems due to Gordona scum.

Foaming control methods

  • Operation at low MCRTs
  • Selectors
  • Selective wasting of scum
  • Addition of polymer
  • Chlorination

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