Model based Control of a Continuous Yeast Fermentation

Maria Yolanda Andersen, Henrik Brabrand, Sten Bay Jørgensen

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Abstract

Control of a continuous fermentation with Saccharomyces cerevisiae is performed by manipulation of the feed flow rate using an ethanol measurement in the exit gas The process is controlled at the critical dilution rate with a low ethanol concentration of 40-50 mg/l. A standard PI controller is able to maintain the process satisfactory around the critical dilutio rate, but better performance is obtained with both an adaptive and a non-adaptive LQ controller. However, simulation results indicates that improved performance of the PI controller can be obtained using a simple approximate model to calculate the tuning parameters. The results show that linear, constant gain controllers give satisfactory performance when the process is maintained in a small operating region. Experiments with significant variations in process operation are necessary to demonstrate the advantages of adaptive control.
Original languageEnglish
Title of host publicationAmerican Control Conference
Place of PublicationBoston, MA, USA
PublisherIEEE
Publication date1991
Pages1329-1334
ISBN (Print)0-87942-565-2
Publication statusPublished - 1991
Event1991 American Control Conference - Boston, MA, United States
Duration: 26 Jun 199128 Jun 1991

Conference

Conference1991 American Control Conference
CountryUnited States
CityBoston, MA
Period26/06/199128/06/1991

Bibliographical note

Copyright: 1991 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

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