Bioproduction of Butanol in Bioreactors: New Insights From Simultaneous In Situ Butanol Recovery to Eliminate Product Toxicity

Autor(es)

Mariano, Adriano Pinto ^{[1, 2]} ; Qureshi, Nasib ^[3] ; Maciel Filho, Rubens ^[2] ; Ezeji, Thaddeus Chukwuemeka ^[1]

Afiliação do(s) autor(es)

^[1] Ohio State Univ, Ohio Agr Res & Dev Ctr, Dept Anim Sci, Wooster, OH 44691 - USA

^[2] Univ Campinas UNICAMP, Sch Chem Engn, Lab Optimizat Design & Adv Control LOPCA, Campinas, SP - Brazil

^[3] ARS, USDA, Natl Ctr Agr Utilizat Res, Bioenergy Res Unit, Peoria, IL 61604 - USA

• Tipo de documento: Artigo Científico
• Fonte: Biotechnology and Bioengineering; v. 108, n. 8, p. 1757-1765, AUG 2011.
• Citações Web of Science: 64

Resumo

Simultaneous acetone butanol ethanol (ABE) fermentation by Clostridium beijerinckii P260 and in situ product recovery was investigated using a vacuum process operated in two modes: continuous and intermittent. Integrated batch fermentations and ABE recovery were conducted at 37 degrees C using a 14-L bioreactor (7.0 L fermentation volume) containing initial substrate (glucose) concentration of 60 g/L. The bioreactor was connected in series with a condensation system and vacuum pump. Vacuum was applied continuously or intermittently with 1.5 h vacuum sessions separated by 4, 6, and 8 h intervals. A control ABE fermentation experiment was characterized by incomplete glucose utilization due to butanol toxicity to C. beijerinckii P260, while fermentation coupled with in situ recovery by both continuous and intermittent vacuum modes resulted in complete utilization of glucose, greater productivity, improved cell growth, and concentrated recovered ABE stream. These results demonstrate that vacuum technology can be applied to integrated ABE fermentation and recovery even though the boiling point of butanol is greater than that of water. Biotechnol. Bioeng. 2011;108: 1757-1765. (C) 2011 Wiley Periodicals, Inc. (AU)

• Processo FAPESP: 07/00341-1 - Modelagem, simulacao e controle de um processo fermentativo continuo extrativo de producao de butanol.
• Beneficiário: Adriano Pinto Mariano
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado