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.
Skip Nav Destination
Article navigation
Research Article|
June 01 2001
State estimation for a biological phosphorus removal process using an asymptotic observer
A. Larose;
A. Larose
1Department of Chemical Engineering, Building 229, Technical University of Denmark, DK-2800 Lyngby, Denmark
Search for other works by this author on:
S. B. Jørgensen
S. B. Jørgensen
1Department of Chemical Engineering, Building 229, Technical University of Denmark, DK-2800 Lyngby, Denmark
Search for other works by this author on:
Water Sci Technol (2001) 43 (11): 205–213.
Citation
A. Larose, S. B. Jørgensen; State estimation for a biological phosphorus removal process using an asymptotic observer. Water Sci Technol 1 June 2001; 43 (11): 205–213. doi: https://doi.org/10.2166/wst.2001.0684
Download citation file:
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Could not validate captcha. Please try again.
eBook
Pay-Per-View Access
$38.00