Non-steady state modeling of extracellular polymeric substances, soluble microbial products, and active and inert biomass

Chrysi S. Laspidou, Bruce E. Rittmann

Research output: Contribution to journalArticle

153 Scopus citations

Abstract

We present a modeling approach that quantifies the unified theory presented in the companion paper. In this approach, we use mathematical modeling to quantify the relationships among three solid species - bacteria, extracellular polymeric substances (EPS), and inert residual biomass - two soluble microbial products (SMP), original substrate, and an electron acceptor. According to the model, donor electrons are used for the synthesis of biomass, EPS, and utilization-associated products. Residual inert biomass and biomass-associated products are produced from the decay of active biomass and the hydrolysis of EPS, respectively. The model includes mass balance equations that consistently describe the flow of electrons among the components. It is solved with a set of parameters appropriate to the experimental study of Hsieh et al. (Biotech. Bioeng. 44 (1994) 219). Model outputs capture all trends observed in steady-state CSTR experiments and transient batch experiments. This agreement supports that the unified theory correctly captures the interconnections among SMP, EPS, and active and inert biomass.

Original languageEnglish (US)
Pages (from-to)1983-1992
Number of pages10
JournalWater Research
Volume36
Issue number8
DOIs
StatePublished - Jan 1 2002
Externally publishedYes

Keywords

  • Biofilm modeling
  • Electron acceptor
  • Extracellular polymeric substances
  • Hydrolysis
  • Inert biomass
  • Soluble microbial products

ASJC Scopus subject areas

  • Ecological Modeling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

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