Study of Dynaic Gluconic Acid Fermentation by Aspergillus niger

Agustriyanto, Rudy and Fatmawati, Akbarningrum (2010) Study of Dynaic Gluconic Acid Fermentation by Aspergillus niger. In: 2010 International Chemical Congress of Pasific Basin Societies, December 15-20, 2010, Honolulu, Hawaii, USA.

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Gluconic acid is organic acid which has many industrial and daily uses. The aim of this study is to investigate the dynamic behavior of gluconic acid production by Aspergillus niger in single continuous fermenter. The dynamic study will enhance understanding of the fermentation proess and especially it will be useful in designing control strategy, selecting controller settings and optimizing process operating conditions. Instead of Logistic kinetic, the Contois kinetic parameters which had been studied previously were chosen, as it provides dynamic relationship among substrate, cells and product. The data was collected from batch fermentation experiment with initial substrate concentration of 150 g/l and the kinetic parameters were determined using nonlinear least square curve fitting. Contois equation is used for cell growth, Luedeking-Piret equation for gluconic acid formation, and Luedeking-Piret-like equation for glucose consumption. The models for continuous fermentation were derived from mass balances within fermenter. The hydraulic retention time used was determined 24 h. here, we present the dynamic behavior of continuous fermentation for gluconic acid production under possible disturbances that might occur. Figure 1 shows 24 h output profile subject to step disturbance change of inlet substrate concentration. It can be seen that the output exhibit approximately first order respose to the substrate change.

Item Type: Conference or Workshop Item (Poster)
Subjects: Q Science > QA Mathematics
Q Science > QD Chemistry
Q Science > QR Microbiology
T Technology > T Technology (General)
T Technology > TP Chemical technology
Divisions: Faculty of Engineering > Department of Chemical Engineering
Depositing User: Rudy Agustriyanto, M.Sc 199005
Date Deposited: 31 Jul 2012 03:52
Last Modified: 31 Jul 2012 03:52

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