title: Biobutanol production from C5/C6 carbohydrates integrated with pervaporation: experimental results and conceptual plant design.
abstract: In this study, a simulated lignocellulosic hydrolyzate was used in a continuous two-stage fermentor setup for production of acetone, butanol and ethanol. An organophilic pervaporation unit was coupled to the second fermentor. The dilution rate in the first fermentor was kept constant at 0.109 h(-1), while the dilution rate in the second fermentor was gradually decreased from 0.056 to 0.020 h(-1). Glucose was completely consumed, while 61% of the xylose was consumed at the lowest dilution rate, leading to an overall solvent productivity of 0.65 g L(-1) h(-1) and a high concentration of 185 g kg(-1) solvents in the permeate in the last fermentation zone during 192 h. Based on the experimental results, a process integrated with organophilic pervaporation was conceptually designed and compared with a base-case. Chemcad simulations indicate an energy reduction of ~50% when organophilic pervaporation is used. This study also demonstrates significant reductions in process flows and energy consumption by the use of organophilic pervaporation as in situ product recovery technology.
authors.affiliation: Flemish Institute for Technological Research (VITO), Business Unit Separation and Conversion Technology, Boeretang 200, 2400, Mol, Belgium. wouter.vanhecke@vito.be.
authors.forename: Wouter
authors.identifier: http://orcid.org/0000-0002-8140-4562
authors.initials: W
authors.lastname: Van Hecke
authors.affiliation: Flemish Institute for Technological Research (VITO), Business Unit Separation and Conversion Technology, Boeretang 200, 2400, Mol, Belgium. pieter.vandezande@vito.be.
authors.forename: Pieter
authors.initials: P
authors.lastname: Vandezande
authors.affiliation: Flemish Institute for Technological Research (VITO), Business Unit Separation and Conversion Technology, Boeretang 200, 2400, Mol, Belgium. marjorie.dubreuil@vito.be.
authors.forename: Marjorie
authors.initials: M
authors.lastname: Dubreuil
authors.affiliation: Flemish Institute for Technological Research (VITO), Business Unit Separation and Conversion Technology, Boeretang 200, 2400, Mol, Belgium. maarten.uyttebroeck@vito.be.
authors.forename: Maarten
authors.initials: M
authors.lastname: Uyttebroek
authors.affiliation: Flemish Institute for Technological Research (VITO), Business Unit Separation and Conversion Technology, Boeretang 200, 2400, Mol, Belgium. herman.beckers@vito.be.
authors.forename: Herman
authors.initials: H
authors.lastname: Beckers
authors.affiliation: Flemish Institute for Technological Research (VITO), Business Unit Separation and Conversion Technology, Boeretang 200, 2400, Mol, Belgium. heleen.dewever@vito.be.
authors.forename: Heleen
authors.initials: H
authors.lastname: De Wever
mesh_terms: D000096:Acetone / Q000378:metabolism; D019149:Bioreactors; D000440:Butanols / Q000378:metabolism*; D050260:Carbohydrate Metabolism; D000431:Ethanol / Q000378:metabolism; D005285:Fermentation; D005947:Glucose / Q000378:metabolism; D014835:Volatilization
chemical_list: D000440:Butanols; D000096:Acetone; D000431:Ethanol; D005947:Glucose
keywords: Biobutanol; Bioprocess design; In situ product recovery; Pervaporation; Process integration; Product inhibition