Concentrations monitoring via software sensor for bioreactors under model parametric uncertainty: Application to cadmium removal in an anaerobic pro

Alexandria Engineering Journal

M.I. Neria González¹  R. Aguilar López²  P.A. López Pérez³  M.R. Pérez García⁴ 

[1] Chemical and Biochemical Engineering Division, Tecnológico de Estudios Superiores de Ecatepec, Tecnológico, 55210, Valle de Anáhuac, Ecatepec de Morelos, Estado de México, Mexico;Department of Biotechnology & Bioengineering CINVESTAV-IPN, Instituto Politécnico Nacional 2508, San Pedro Zacatenco, 07360 México, D.F, Mexico;Escuela Superior de Apan, Universidad Autónoma del Estado de Hidalgo, Carretera Apan-Calpulalpan, km. 8, Chimalpa Tlalayote s/n Colonia Chimalpa, Apan, 43900 Hgo, Mexico;IK4-CIDETEC, Parque Científico y Tecnológico de Gipuzkoa Ceramic Surfaces Unit – P° Miramón, 196 20009 Donostia – San Sebastián, Spain;

关键词: Local observability;    Nonlinear observer;    Parametric uncertainties;    Heavy-metal removal;    Sulfate-reducing bioreactor;   

DOI  :  10.1016/j.aej.2016.03.013

来源: DOAJ

【 摘 要 】

The main objective of this work was to design a software sensor device based on state observer for a class of continuous bioreactor with application to heavy metal removal and locally analyze the observability properties of the considered system, considering parametric uncertainties. First, an alternative phenomenological model of the main state variables of the process was formulated, considering an unstructured kinetic approach based on Levenspiel product inhibition model; this kinetic model was experimentally validated. The kinetic model was used as a benchmark plant and extended for continuous operation in order to analyze the local observability properties, considering several sets of measured outputs that produce observable subspaces of different dimensions. In addition, we present a nonlinear observer, which is robust against parametric uncertainties, to estimate the observable states of the bioreactor. The convergence of the proposed methodology was analyzed using Lyapunov stability theory. Numerical experiments were done in order to show the performance of the proposed observer and the observability properties of the system.

【 授权许可】

Unknown