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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Energy requirements during butanol production and in situ recovery by cyclic vacuum

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Mariano, Adriano Pinto [1, 2] ; Maciel Filho, Rubens [2] ; Ezeji, Thaddeus Chukwuemeka [1]
Total Authors: 3
[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, BR-13083852 Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: RENEWABLE ENERGY; v. 47, p. 183-187, NOV 2012.
Web of Science Citations: 25

Performance of the ABE fermentation and integrated product recovery by cyclic vacuum was investigated in a 14-1 bioreactor containing initial glucose concentration of 60 g l(-1) at 35 degrees C. The cyclic operation consisted of 2 h-vacuum-cycles separated by 4 h-fermentation intervals at atmospheric pressure. Application of periodic vacuum sufficed to eliminate hutanol inhibition of Clostridium beijerinckii 8052 culture, which tolerated alternate vacuum and atmospheric pressures. A 39% reduction in the energy requirement for acetone butanol ethanol (ABE) fermentation and in situ recovery by vacuum was achieved by changing the mode of vacuum operation from continuous (24 h vacuum time) to cyclic (12 h vacuum time). Analysis of the overall energy consumption for ABE fermentation and recovery (vacuum fermentation + distillation) demonstrated that cyclic vacuum ABE fermentation is more energy efficient than the conventional batch fermentation. (C) 2012 Elsevier Ltd. All rights reserved. (AU)