Journal
BIORESOURCE TECHNOLOGY
Volume 164, Issue -, Pages 276-284Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.04.107
Keywords
ABE fermentation; Permeating-heating-gas stripping; Fed-batch fermentation; Cell immobilization
Funding
- National Outstanding Youth Foundation of China [21025625]
- National High-Tech Research and Development Program of China (863) [2012AA021200]
- National Basic Research Program of China (973) [2011CBA00806]
- National Key Technology RD Program [2012BAI44G01]
- National Natural Science Foundation of China [201390204]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1066]
- Jiangsu Provincial Natural Science Foundation of China [SBK 201150207]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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Butanol recovery from acetone-butanol-ethanol (ABE) fed-batch fermentation using permeating-heating-gas was determined in this study. Fermentation was performed with Clostridium acetobutylicum B3 in a fibrous bed bioreactor and permeating-heating-gas stripping was used to eliminate substrate and product inhibition, which normally restrict ABE production and sugar utilization to below 20 g/L and 60 g/L, respectively. In batch fermentation (without permeating-heating-gas stripping), C. acetobutylicum B3 utilized 60 g/L glucose and produced 19.9 g/L ABE and 12 g/L butanol, while in the integrated process 290 g/L glucose was utilized and 106.27 g/L ABE and 66.09 g/L butanol were produced. The intermittent gas stripping process generated a highly concentrated condensate containing approximately 15% (w/v) butanol, 4% (w/v) acetone, a small amount of ethanol (<1%), and almost no acids, resulting in a highly concentrated butanol solution [similar to 70% (w/v)] after phase separation. Butanol removal by permeating-heating-gas stripping has potential for commercial ABE production. (C) 2014 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons. org/licenses/by-nc-nd/3.0/).
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