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Simultaneous estimation of sludge biological activity and influent nitrogen load using ORP and DO dynamics

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Abstract

This paper proposes a new optimization strategy to estimate nitrifiable nitrogen concentration in wastewater, nitrification rate, denitrification rate and/or COD available for denitrification of an activated sludge process submitted to intermittent aeration. The approach uses the oxydo-reduction potential and dissolved oxygen measurements only. The parameter identification is based on a Simplex optimization of a cost function related to the error between an experimental cycle (an aerobic period followed by an anoxic one) and a simulation of a reduced model derived from ASM1. Results show very good prediction of experimental oxygen, ammonium and nitrate profiles. The estimation of nitrifiable nitrogen and removal rates has been validated both on simulated data obtained from COST action 624 benchmark and on experimental data.

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Notes

  1. We consider in the following that the return sludge is free from nitrate, then \(S_{NO_3^-}^{x}=0\)

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Authors and Affiliations

  1. LAAS-CNRS, 7 avenue du Colonel Roche, 31077, Toulouse cedex 04, France

    Isabelle Queinnec

  2. Laboratoire d’Ingénierie des Procédés de l’Environnement (LIPE), DGPI-INSA, 135 Avenue de Rangueil, 31077, Toulouse cedex 04, France

    Mathieu Spérandio

Authors
  1. Isabelle Queinnec
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  2. Mathieu Spérandio
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Correspondence to Isabelle Queinnec.

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Queinnec, I., Spérandio, M. Simultaneous estimation of sludge biological activity and influent nitrogen load using ORP and DO dynamics. Bioprocess Biosyst Eng 27, 329–337 (2005). https://doi.org/10.1007/s00449-005-0411-7

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  • DOI: https://doi.org/10.1007/s00449-005-0411-7

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