Effect of pH control on EBPR stability and efficiency

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Abstract

Biological phosphorus removal from water surfaces is an important process for the control of eutrophication. Even though much attention has been devoted to understanding the metabolism of bacteria and the effect of operational parameters on the efficiency of the phosphorus removal process, certain aspects are still unclear. The aim of this work was to evaluate the influence of pH control on the stability and efficiency of two sequenced batch reactors (SBR): one operated with pH control (pH 7.0) and the other without pH control (pH raised from around 7.8 to 8.5). The reactor operated without pH control showed higher efficiency on phosphorus removal and stability than the reactor with pH control. Based on the kinetics of both reactors it could be inferred that a different population developed in both systems.

Original languageEnglish
Pages (from-to)179-184
Number of pages6
JournalWater Science and Technology
Volume46
Issue number4-5
Publication statusPublished - 9 Oct 2002
Event2nd World Water Congress of the International Water Association - Berlin, Germany
Duration: 15 Oct 200119 Oct 2001

Keywords

  • Activated sludge
  • EBPR
  • Glycogen
  • pH control
  • PHA
  • Polyphosphate

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