期刊
BIORESOURCE TECHNOLOGY
卷 135, 期 -, 页码 396-402出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.07.062
关键词
ABE fermentation; Butanol; Clostridium acetobutylicum; Fibrous bed bioreactor; Two-stage gas stripping
资金
- Ohio Department of Development-Third Frontier Advanced Energy Program [Tech 08036]
- National Science Foundation STTR program [IIP-0810568, IIP-1026648]
- Advanced Research Projects Agency-Energy [DE-AR0000095]
- Fundamental Research Funds for the Central Universities [DUT11RC(3)77]
- China Postdoctoral Science Foundation [20110491527]
- China Scholarship Council [2009100607]
- Div Of Industrial Innovation & Partnersh
- Directorate For Engineering [1026648] Funding Source: National Science Foundation
Two-stage gas stripping for butanol recovery from acetone-butanol-ethanol (ABE) fermentation with Clostridium acetobutylicum JB200 in a fibrous bed bioreactor was studied. Compared to fermentation without in situ gas stripping, more ABE (10.0 g/L acetone, 19.2 g/L butanol, 1.7 g/L ethanol vs. 7.9 g/L acetone, 16.2 g/L butanol, 1.4 g/L ethanol) were produced, with a higher butanol yield (0.25 g/g vs. 0.20 g/g) and productivity (0.40 g/L.h vs. 0.30 g/L-h) due to reduced butanol inhibition. The first-stage gas stripping produced a condensate containing 175.6 g/L butanol (227.0 g/L ABE), which after phase separation formed an organic phase containing 612.3 g/L butanol (660.7 g/L ABE) and an aqueous phase containing 101.3 g/L butanol (153.2 g/L ABE). After second-stage gas stripping, a highly concentrated product containing 420.3 g/L butanol (532.3 g/L ABE) was obtained. The process is thus effective in producing high-titer butanol that can be purified with much less energy. (C) 2012 Elsevier Ltd. All rights reserved.
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