Adaptive control of the methane flow rate in biogas plants

Author

Draa, Khadidja Chaib ; Voos, Holger ; Alma, Marouane ; Darouach, Mohamed

Author_Institution

Fac. des Sci., de la Technol. et de la Commun. (FSTC), Univ. du Luxembourg, Luxembourg, Luxembourg

fYear

2015

fDate

25-27 May 2015

Firstpage

1

Lastpage

6

Abstract

In this paper we consider the control of the methane flow rate in biogas production using a continuous stirred tank reactor or a fixed bed digester. The goal is to regulate the methane flow rate in order to match an energy demand in spite of variations in the waste concentrations. For this purpose, a two step (acidogenesis-methanogenesis) nonlinear mass balance model is considered. Due to the costs and complexity of the measurements an observer based estimator is designed for the acidogenesis reaction rate. The stability of the observation part is proved and its implementation with the designed control laws for both the methane flow rate and the acetate concentration in the reactor are confirmed by simulations.

Keywords

adaptive control; biofuel; chemical reactors; flow control; observers; stability; acidogenesis-methanogenesis; biogas production; continuous stirred tank reactor; fixed bed digester; methane flow rate adaptive control; nonlinear mass balance model; observer based estimator; stability; Biological system modeling; Inductors; Mathematical model; Microorganisms; Process control; Production; Substrates; Anaerobic Digestion; Linearized Control; Nonlinear Models; Observer Based Estimator;

fLanguage

English

Publisher

ieee

Conference_Titel

Control, Engineering & Information Technology (CEIT), 2015 3rd International Conference on

Conference_Location

Tlemcen

Type

conf

DOI

10.1109/CEIT.2015.7233155

Filename

7233155