Interpretation of bacterial. Activities in nitrification filters by a biofilm model considering the kinetics of soluble microbial products

H. Furumai, B. E. Rittmann

Research output: Contribution to journalArticle

24 Scopus citations


Activities of heterotrophic bacteria in nonsteady-state biofilms were evaluated using a simplified biofilm model in which formation and exchange of soluble microbial products (SMP) by nitrifiers and heterotropbs were considered. The model was applied to experimental results for a trace-level substrate removal. The model predictions indicated that SMP from nitrifiers contributed to supporting heterotrophic growth aid their substrate removal potential. The biological interactions were more significant in cases of low influent substrate COD concentrations aid increased with higher influent ammonium concentration. The introduction of SMP kinetics into the model captured the key aspects of removal and formation of COD components in biofilms receiving low influent substrate concentrations, such as nitrification filters for drinking water treatment and wastewater reuse.

Original languageEnglish (US)
Pages (from-to)147-156
Number of pages10
JournalWater Science and Technology
Issue number11
StatePublished - Dec 1 1994
Externally publishedYes



  • Biological filters
  • Heterotrophic activity
  • Microbial products
  • Multispecies biofilm
  • Nitrification
  • Trace-level substrate

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

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