In situ extractive ethanol fermentation in a drop column bioreactor

Autor(es)

Lemos, Diego A. ^[1] ; Sonego, Jorge L. S. ^[1] ; Cruz, Antonio J. G. ^[1] ; Badino, Alberto C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Chem Engn Grad Program, Rod Washington Luis, Km 235, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY; v. 93, n. 5, p. 1381-1387, MAY 2018.
• Citações Web of Science: 1

Resumo

BACKGROUNDIn conventional ethanol fermentation processes, the low ethanol content in the wine is due to inhibition of its production by the yeast cells. Extractive fermentation is an alternative process that can be used to overcome product inhibition by removing the ethanol from the fermentation broth. The present study describes the modeling and experimental validation of ethanol production in extractive batch fermentation, with in situ ethanol extraction by oleic acid, in a non-conventional drop column bioreactor (DCB) operated under industrial conditions. RESULTSA model was developed using the hybrid Andrews-Levenspiel equation and the ethanol distribution coefficient (K-DE), which provided an excellent description of the extractive fermentation process with oleic acid. Furthermore, higher ethanol productivities were obtained in the extractive fermentations, with ethanol productivity of 11.27-12.98 kg m(-3) h(-1), 12.7-29.8% higher when compared with the conventional process without ethanol removal. This was especially evident for the best extractive fermentation, which finished around 2 h earlier than the conventional fermentation. CONCLUSIONThe DCB showed good performance for use in extractive fermentation with liquid-liquid extraction of the ethanol and this technique presented higher ethanol productivity compared with the conventional process. (c) 2017 Society of Chemical Industry (AU)

• Processo FAPESP: 12/50046-4 - Estudo de processos integrados de produção e recuperação de etanol 1G (fapesp-eth bioenergia)
• Beneficiário: Alberto Colli Badino Junior
• Modalidade de apoio: Auxílio à Pesquisa - Parceria para Inovação Tecnológica - PITE