title: Study of in situ 1-butanol pervaporation from A-B-E fermentation using a PDMS composite membrane: validity of solution-diffusion model for pervaporative A-B-E fermentation.
abstract: In this study, the application of a new polydimethylsiloxane (PDMS)/dual support composite membrane was investigated by incorporating the pervaporation process into the A-B-E (acetone-butanol-ethanol) fermentation. The performance of the A-B-E fermentation using the integrated pervaporation/fermentation process showed higher biomass concentrations and higher glucose consumption rates than those of the A-B-E fermentation without pervaporation. The performance of the membrane separation was studied during the separation of 1-butanol from three different 1-butanol solutions: binary, model, and fermentation culture solutions. The solution-diffusion model, specifically the mass transfer equation based on Fick's First Law, was shown to be applicable to the undefined A-B-E fermentation culture solutions. A quantitative comparison of 1-butanol separation from the three different solutions was made by calculating overall mass transfer coefficients of 1-butanol. It was found that the overall mass transfer coefficients during the separation of binary, model, and fermentation culture solutions were 1.50, 1.26, and 1.08 mm/h, respectively.
authors.affiliation: Dept. of Chemical, Materials and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, USA.
authors.forename: Si-Yu
authors.initials: SY
authors.lastname: Li
authors.forename: Ranjan
authors.initials: R
authors.lastname: Srivastava
authors.forename: Richard S
authors.initials: RS
authors.lastname: Parnas
mesh_terms: D020001:1-Butanol / Q000378:metabolism*; D018533:Biomass; D046969:Clostridium acetobutylicum / Q000378:metabolism; D004058:Diffusion; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D005285:Fermentation; D008567:Membranes, Artificial; D008956:Models, Chemical; D012996:Solutions
chemical_list: D004129:Dimethylpolysiloxanes; D008567:Membranes, Artificial; D012996:Solutions; C013830:baysilon; D020001:1-Butanol