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论文类型： 期刊论文

发表时间： 2014-10-20

发表刊物： JOURNAL OF BIOTECHNOLOGY

收录刊物： SCIE、EI、PubMed、Scopus

卷号： 188

页面范围： 158-165

ISSN号： 0168-1656

关键字： PDMS-PVDF membrane; ABE fermentation; Pervaporation; Butanol recovery

摘要： The polydimethylsiloxane-polyvinylidene fluoride (PDMS-PVDF) composite membrane was studied for its pervaporation performance to removal of butanol from butanol/ABE solution, fermentation broth as well as incorporated with acetone-butanol-ethanol (ABE) fermentation. The total flux and butanol titer in permeate through the PDMS-PVDF membrane were up to 769.6 g/m(2) hand 323.5 g/L at 80 degrees C, respectively. The butanol flux and total flux increased with increasing the feed temperature as well as the feed butanol titer. The butanol separation factor and butanol titer in permeate decreased slightly in the presence of acetone and ethanol in the feed due to their preferential dissolution and competitive permeation through the membrane. In fed-batch fermentation incorporated with pervaporation, butanol titer and flux in permeate maintained at a steady level with the range of 139.9-154.0 g/L and 13.3-16.3 g/m(2) h, respectively, which was attributed to the stable butanol titer in fermentation broth as well as the excellent hydrophobic nature of the PDMS-PVDF matrix. Therefore, the PDMS-PVDF composite membrane had a great potential in the in situ product recovery with ABE fermentation, enabling the economic production of biobutanol. (C) 2014 Elsevier B.V. All rights reserved.