Non-linear Analysis of Feedback Controlled Aerobic Cultures

Autor: OLIVIERI, GIUSEPPE, MARZOCCHELLA, ANTONIO, MAFFETTONE, PIER LUCA, SALATINO, PIERO, M. E. Russo, E. Mancusi
Přispěvatelé: Olivieri, Giuseppe, M. E., Russo, E., Mancusi, Marzocchella, Antonio, Maffettone, PIER LUCA, Salatino, Piero
Jazyk: angličtina
Rok vydání: 2013
Předmět:
Zdroj: Chemical Engineering Transactions, Vol 32 (2013)
ICheaP-11, 11th International Conference on Chemical and Process Engineering, pp. 811–816, Milano, 3-5 Giugno 2013
info:cnr-pdr/source/autori:Giuseppe Olivieri, Maria Elena Russo, Erasmo Mancusi, Antonio Marzocchella, Pier Luca Maffettone, Piero Salatino/congresso_nome:ICheaP-11, 11th International Conference on Chemical and Process Engineering/congresso_luogo:Milano/congresso_data:3-5 Giugno 2013/anno:2013/pagina_da:811/pagina_a:816/intervallo_pagine:811–816
ISSN: 2283-9216
Popis: In the present work, the results of a complete dynamical analysis of open- and closed-loop continuous bioreactor for cultures of substrate inhibited aerobic microorganisms were presented. In the closed loop system the dissolved oxygen concentration was controlled at a pre-set value by means of a proportionalintegral feedback control scheme manipulating the inlet substrate concentration. A mathematical model was developed coupling the mass balance equation for the substrates (carbon-source and oxygen) and the controller. Solutions of both open- and closed-loop systems were assessed by means of parametric continuation technique and bifurcational analysis tools. The dynamics behavior was studied by changing the main operating parameters - dilution rate and gas-liquid mass transfer rate - and the controller parameters - gain and set-point - in a wide intervals. We have found that the regimes strongly depend on the operating conditions. In particular, the open-loop unstable steady state may be stabilized in closedloop system, provided the proper choice of both the gain and the reset time for the selected set-point value of oxygen concentration. Copyright �� 2013, AIDIC Servizi S.r.l.
Databáze: OpenAIRE
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