Second-order sliding mode observer for biomass concentration and growth rate estimation in batch photo-bioreactors

TitleSecond-order sliding mode observer for biomass concentration and growth rate estimation in batch photo-bioreactors
Publication TypeJournal Article
Year of Publication2014
AuthorsNuñez S, Garelli F, De Battista H
JournalInternational Journal of Hydrogen Energy
Volume39
Pagination8772 - 8779
ISSN0360-3199
KeywordsBiohydrogen
Abstract

Abstract In this work the problem of estimating some variables of interest for monitoring and control of photo-fermentation processes is addressed. The focus is on a batch cultivation of Rhodobacter capsulatus where biohydrogen production rate is represented by a Luedeking–Piret expression. The use of second-order sliding mode algorithms to estimate biomass concentration and bacterial specific growth rate is explored. It is concluded that the proposed observer does not require a kinetic model, thus eliminating a source of uncertainty. Also, it is shown that the error dynamics converges exponentially with short time constant determined by process parameters. Numerical simulations corroborate the convergence properties of the algorithm in the nominal case, as well as its robustness against parametric uncertainty and its performance under noisy measurement.

URLhttp://www.sciencedirect.com/science/article/pii/S0360319913029662
DOI10.1016/j.ijhydene.2013.12.033
Research Line: 
High order sliding mode algorithms
Algoritmos por modo deslizante de orden superior
Control of biological processes and systems
Control and monitoring of bioprocesses
Control y monitoreo de bioprocesos