TWO-STEP PARAMETER AND STATE ESTIMATION OF THE ANAEROBIC DIGESTION

摘要

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.