title: Two-stage pervaporation process for effective in situ removal acetone-butanol-ethanol from fermentation broth.
abstract: Two-stage pervaporation for ABE recovery from fermentation broth was studied to reduce the energy cost. The permeate after the first stage in situ pervaporation system was further used as the feedstock in the second stage of pervaporation unit using the same PDMS/PVDF membrane. A total 782.5g/L of ABE (304.56g/L of acetone, 451.98g/L of butanol and 25.97g/L of ethanol) was achieved in the second stage permeate, while the overall acetone, butanol and ethanol separation factors were: 70.7-89.73, 70.48-84.74 and 9.05-13.58, respectively. Furthermore, the theoretical evaporation energy requirement for ABE separation in the consolidate fermentation, which containing two-stage pervaporation and the following distillation process, was estimated less than ∼13.2MJ/kg-butanol. The required evaporation energy was only 36.7% of the energy content of butanol. The novel two-stage pervaporation process was effective in increasing ABE production and reducing energy consumption of the solvents separation system.
authors.affiliation: National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Di
authors.initials: D
authors.lastname: Cai
authors.affiliation: National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Song
authors.initials: S
authors.lastname: Hu
authors.affiliation: National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Miao
authors.affiliation: National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Changjing
authors.initials: C
authors.lastname: Chen
authors.affiliation: College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China; Center for Process Simulation & Optimization, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Huidong
authors.initials: H
authors.lastname: Chen
authors.affiliation: National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Changwei
authors.initials: C
authors.lastname: Zhang
authors.affiliation: National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Ping
authors.initials: P
authors.lastname: Li
authors.affiliation: National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China. Electronic address: qinpeiyong@tsinghua.org.cn.
authors.forename: Peiyong
authors.initials: P
authors.lastname: Qin
authors.affiliation: National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Tianwei
authors.initials: T
authors.lastname: Tan
mesh_terms: D000096:Acetone / Q000302:isolation & purification*; D001709:Biotechnology / Q000191:economics / Q000379:methods*; D000440:Butanols / Q000302:isolation & purification*; D003365:Costs and Cost Analysis; D000431:Ethanol / Q000302:isolation & purification*; D005285:Fermentation; D012997:Solvents; D013816:Thermodynamics; D013997:Time Factors; D014835:Volatilization
chemical_list: D000440:Butanols; D012997:Solvents; D000096:Acetone; D000431:Ethanol
keywords: ABE fermentation; In situ product recovery; PDMS membrane; Pervaporation