Steady state modeling of reactor-settler interaction

Moshe Sheintuch*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


The work analyzes the interaction of a biological reactor and a settler coupled either via mass balance, exocellular polymer production or competition between flocculating and filamentous microorganisms. Pertinent experimental information is reviewed. Simple models are constructed to account for the necessary features of the interaction. The analysis reveals that chemical interaction should be correlated with sludge age and optimal operating conditions are derived. Biological interaction induces steady state multiplicity or coexistence of the two species. Recent observations of populations-shift dynamics are presented.

Original languageEnglish
Pages (from-to)1463-1472
Number of pages10
JournalWater Research
Issue number12
StatePublished - Dec 1987
Externally publishedYes


  • activated sludge
  • biological reactor
  • coexistence
  • exocellular polymer
  • filaments
  • settler
  • steady state multiplicity


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