State Estimation for a Biological Phosphorus Removal Process using an Asymptotic Observer

Claude Alain Larose, Sten Bay Jørgensen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This study investigated the use of an asymptotic observer for state estimation in a continuous biological phosphorus removal process. The estimated states are the concentration of heterotrophic, autotrophic, and phosphorus accumulating organisms, polyphosphate, glycogen and PHA. The reaction scheme describing the process was simplified from a combined ASM1-Delft model. Three examples were investigated: operation at steady state, operation at steady state with a random white-noise in the measurements and operation with a ramp disturbance. In each case, the estimation was quite accurate even if the convergence, driven by the dilution rate, was slow (from 15 to 60 days). The propagation of the measurement noise and a bias in the estimation of glycogen and PHA could be the result of the high condition number of one of the matrices used in the algorithm of the asymptotic observer for the aerated tanks.
Original languageEnglish
JournalWater Science and Technology
Volume43
Issue number11
Pages (from-to)205-213
ISSN0273-1223
Publication statusPublished - 2001

Fingerprint

Dive into the research topics of 'State Estimation for a Biological Phosphorus Removal Process using an Asymptotic Observer'. Together they form a unique fingerprint.

Cite this