A process of isobutanol production from sugarcane bagasse hydrolysates in Enterobacter aerogenes was developed here with a pervaporation-integrated procedure. Isobutanol pathway was overexpressed in a mutant strain with eliminated byproduct-forming enzymes (LdhA, BudA, and PflB). A glucose-and-xylose–coconsuming ptsG mutant was constructed for effective utilization of lignocellulosic biomass. Toxic effects of isobutanol were alleviated by in situ recovery via a pervaporation procedure. Compared to single-batch fermentation, cell growth and isobutanol titer were improved by 60% and 100%, respectively, in the pervaporation-integrated fermentation process. A lab-made cross-linked polydimethylsiloxane membrane was cast on polyvinylidene fluoride and used in the pervaporation process. The membrane-penetrating condensate contained 55–226 g m−2 h−1 isobutanol with 6–25 g L−1 ethanol after separation. This study offers improved fermentative production of isobutanol from lignocellulosic biomass with a pervaporation procedure.
Bibliographical noteFunding Information:
This study was supported by a grant from the National Research Foundation funded by the Korean Government (2012M1A2A2026560 and 2017R1A2B4008758).
This study was supported by a grant from the National Research Foundation funded by the Korean Government ( 2012M1A2A2026560 and 2017R1A2B4008758 ).
© 2018 Elsevier Ltd
- Enterobacter aerogenes
- Lignocellulosic biomass
- Sugarcane bagasse hydrolysate
ASJC Scopus subject areas
- Environmental Engineering
- Renewable Energy, Sustainability and the Environment
- Waste Management and Disposal