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TWO-STEP PARAMETER AND STATE ESTIMATION OF THE ANAEROBIC DIGESTION
V. Lubenova, I. Simeonov*, I. Queinnec**
Institute of Control and System Research, Bulgarian Academy of Sciences
Acad. G. Bontchev St., Bock 2, 1113 Sofia, Bulgaria
E-mail: lubenova@iusi.bas.bg
* Institue of Microbiology, Bulgarian Academy of Sciences,
Acad. G. Bonchev St., Block 26, Sofia 1113, Bulgaria
E-mail: ISSIM@microbio.bas.bg
** Laboratoire d’Analyse et d’Architecture des Systèmes (LAAS/CNRS)
7, Avenue du Colonel Roche, 31077 Toulouse cedex 4, France
E-mail: queinnec@laas.fr
This paper is devoted to the state and parameter observation for anaerobic digestion process of organic waste. The observation has a two-step structure using separation of acidogenic stage from the methanogenic phase. Two observers and one estimator are built on the basis of a mass-balance nonlinear model of the process, involving a new control input, which reflects the addition of a stimulating substance (acetate). Laboratory experiments have been done with step changes of this new input. The stability of the observers is proven and performances are investigated on experimental data and simulations.
Keywords: anaerobic digestion, lab-scale experiments, acetate supply, non-linear model, parameter and state observation.
Session slot T-Tu-M13: Dynamics and Control of Bioprocesses/Area code 7d : Control of Biotechnological Processes
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