Respirometry-based on-line model parameter estimation at a full-scale WWTP

H. Spanjers, G.G. Patry, K.J. Keesman

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)


This paper describes part of a project to develop a systematic approach to knowledge extraction from on-line respirometric measurements in support of wastewater treatment plant control and operation. The paper deals with the following issues: (1) test of the implementation of an automatic set-up consisting of a continuous laboratory respirometer integrated in a mobile trailer with sampling and dosing equipment, and data-acquisition and communication system; (2) assessment of activated sludge/sewage characteristics from sludge respirograms by model parameter estimation; (3) comparison of the parameter estimates with regular plant data and information obtained from supplementary wastewater respirograms. The paper describes the equipment and some of its measuring results from a period of one week at a large-scale wastewater treatment plant. The measurements were evaluated in terms of the common activated sludge modelling practice. The automatic set-up allowed reliable measurements during at least one week. The data were used to calibrate two different version of the model, and independent parameter estimates were obtained.
Original languageEnglish
Pages (from-to)4-5
JournalWater Science and Technology
Publication statusPublished - 2002


  • waste water treatment
  • activated sludge
  • respirometry
  • measurement
  • models
  • sewage
  • chemical oxygen demand


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