Integration of performance, molecular biology and modeling to describe the activated sludge process

V. Urbain, B. Mobarry, V. De Silva, D. A. Stahl, Bruce Rittmann, J. Manem

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

To study process performance and population dynamics in activated sludge, a pilot-scale Membrane Bioreactor (MBR) was installed in a municipal wastewater treatment plant (Aubergenville, France). Since no solids losses occur in the MBR effluent, the sludge residence time (SRT) can be: i) easily controlled by means of the sludge withdrawal, and ii) dissociated from the hydraulic residence time (HRT). A complete characterization of this activated sludge system was performed at three sludge ages (5, 10 and 20 days). Raw and treated wastewater quality, as well as sludge concentration, was analyzed, nucleic probe analysis was performed to determine the heterotrophic and nitrifier populations, and the results were compared to the output from a multispecies model that integrates substrate removal kinetics and soluble microbial products (SMP) production/consumption. This paper presents an integrated analysis of the activated sludge process based on chemical, molecular biology, and mathematical tools. The model was able to describe the MBR system with a high degree of accuracy, in terms of COD removal and nitrification, as well as sludge production and population dynamics through the ratio of active nitrifiers/bacteria. Both steady-state and transient conditions could be described accurately by the model, except for technical problems or sudden variations in the wastewater composition.

Original languageEnglish (US)
Pages (from-to)223-229
Number of pages7
JournalWater Science and Technology
Volume37
Issue number4-5
DOIs
StatePublished - 1998
Externally publishedYes

Fingerprint

Activated sludge process
Molecular biology
Molecular modeling
Bioreactors
activated sludge
Population dynamics
sludge
Membranes
bioreactor
Wastewater
modeling
membrane
Nitrification
Sewage sludge
residence time
population dynamics
Wastewater treatment
Effluents
Bacteria
wastewater

Keywords

  • Activated sludge
  • Membrane bioreactor
  • Modeling
  • Nitrification
  • Nucleic probes
  • Sludge production

ASJC Scopus subject areas

  • Water Science and Technology

Cite this

Integration of performance, molecular biology and modeling to describe the activated sludge process. / Urbain, V.; Mobarry, B.; De Silva, V.; Stahl, D. A.; Rittmann, Bruce; Manem, J.

In: Water Science and Technology, Vol. 37, No. 4-5, 1998, p. 223-229.

Research output: Contribution to journalArticle

Urbain, V. ; Mobarry, B. ; De Silva, V. ; Stahl, D. A. ; Rittmann, Bruce ; Manem, J. / Integration of performance, molecular biology and modeling to describe the activated sludge process. In: Water Science and Technology. 1998 ; Vol. 37, No. 4-5. pp. 223-229.
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