Sugarcane molasses fermentation with in situ gas stripping using low and moderate sugar concentrations for ethanol production: Experimental data and modeling

Autor(es)

Ponce, Gustavo Henrique Santos F. ^[1] ; Neto, Joao Moreira ^[1] ; De Jesus, Sergio Santos ^[1] ; de Carvalho Miranda, Julio Cesar ^[1] ; Maciel Filho, Rubens ^[1] ; de Andrade, Rafael Ramos ^[2] ; Wolf Maciel, Maria Regina ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Chem Engn, Lab Optimizat, Design Adv Control, BR-13083970 Campinas, SP - Brazil

^[2] Univ Fed Sao Paulo, Dept Exact & Earth Sci, Diadema, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Biochemical Engineering Journal; v. 110, p. 152-161, JUN 15 2016.
• Citações Web of Science: 7

Resumo

In this study, the feasibility of gas stripping technique was studied for Brazilian sugarcane industry conditions: Saccharomyces cerevisiae yeast and sugarcane molasses as raw material. The experimental trials were carried out in batch into two levels of gas flow rate (4 and 6 L/min) and sugar concentration (170 and 250 g/L). Results showed that the gas stripping technique was effective since ethanol concentration was maintained below threshold of toxicity (no more than 60 g/L in all cases), as well as sugar containing was consumed almost completely. Furthermore, a mixed mathematical model combining a complex term for the ethanol entrainment from gas stripping fermentation was proposed based in robust models for sugarcane molasses previously presented in literature. ParametersY(px), mu(max), P-max, Y-x, X-max were estimated and presented itself within previous ranges validated for sugarcane molasses. The methodology of parameters estimation using genetic algorithms showed to have good performance, and the model was able to predict the data set of glucose, biomass and ethanol concentrations in low and high levels of sugarcane molasses in the broth, with only one set of parameters. (C) 2016 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 12/17706-0 - Desenvolvimento De Um Processo Fermentativo Extrativo De Produção De Etanol Por Arraste Gasoso.
• Beneficiário: Gustavo Henrique Santos Flores Ponce
• Modalidade de apoio: Bolsas no Brasil - Doutorado