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Optimization of a fed-batch simultaneous saccharification and cofermentation process from lignocellulose to ethanol / Ming-Liang Chen in Industrial & engineering chemistry research, Vol. 49 N° 12 (Juin 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 12 (Juin 2010) . - pp. 5775–5785 Titre : Optimization of a fed-batch simultaneous saccharification and cofermentation process from lignocellulose to ethanol Type de document : texte imprimé Auteurs : Ming-Liang Chen, Auteur ; Feng-Sheng Wang, Auteur Année de publication : 2010 Article en page(s) : pp. 5775–5785 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : imultaneous  saccharification  Fed-batch  process  Ethanol Résumé : This paper presents the design of optimal control policies for a fed-batch process of simultaneous saccharification and cofermentation to produce ethanol from lignocellulose using enzymes and a recombinant yeast. The goal of the optimal design herein is to find the optimal feed rate, temperature, feed lignocellulosic concentration, and fermentation time that maximizes the ethanol production rate under the constraints of operational restrictions. We applied an Arrhenius relationship to each rate constant to express the temperature effect on the kinetic model for both saccharification and fermentation. Good bioreactor performance not only is defined as the maximum production rate yielded but also considers follow-up separation specifications as the constraints for the optimization problem. Additional restrictions were also considered in the optimization problem to cope with operating costs and environmental impact. Both crisp and fuzzy optimization methods are applied to solve the problem. The fuzzy optimization approach more flexibly obtains a compromised design compared with the crisp optimization method. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1001982 [article] Optimization of a fed-batch simultaneous saccharification and cofermentation process from lignocellulose to ethanol [texte imprimé] / Ming-Liang Chen, Auteur ; Feng-Sheng Wang, Auteur . - 2010 . - pp. 5775–5785. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 12 (Juin 2010) . - pp. 5775–5785 Mots-clés : imultaneous  saccharification  Fed-batch  process  Ethanol Résumé : This paper presents the design of optimal control policies for a fed-batch process of simultaneous saccharification and cofermentation to produce ethanol from lignocellulose using enzymes and a recombinant yeast. The goal of the optimal design herein is to find the optimal feed rate, temperature, feed lignocellulosic concentration, and fermentation time that maximizes the ethanol production rate under the constraints of operational restrictions. We applied an Arrhenius relationship to each rate constant to express the temperature effect on the kinetic model for both saccharification and fermentation. Good bioreactor performance not only is defined as the maximum production rate yielded but also considers follow-up separation specifications as the constraints for the optimization problem. Additional restrictions were also considered in the optimization problem to cope with operating costs and environmental impact. Both crisp and fuzzy optimization methods are applied to solve the problem. The fuzzy optimization approach more flexibly obtains a compromised design compared with the crisp optimization method. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1001982