title: Feasibility and energetic evaluation of air stripping for bioethanol production.
abstract: Stripping of mashes with air as stripping gas and low ethanol contents between 3 and 5wt% was investigated in terms of its suitability for continuous bioethanol production. Experiments in a Blenke cascade system were carried out and the results were compared with values obtained from theoretical vapour-liquid-equilibrium calculations. The whole stripping process was energetically evaluated by a simulation in ChemCAD and compared to conventional distillation. Therefore several parameters such as temperature, air volume flow and initial ethanol load of the mash were varied. Air stripping was found to be a suitable separation method for bioethanol from mashes with low concentrations. However, energetic aspects have to be considered, when developing a new process.
authors.affiliation: Institute of Food Science and Biotechnology, Department of Yeast Genetics and Fermentation Technology, Universität Hohenheim, Garbenstr. 23, 70599 Stuttgart, Germany. Electronic address: sandra.schlaefle@uni-hohenheim.de.
authors.forename: Sandra
authors.initials: S
authors.lastname: Schläfle
authors.affiliation: Institute of Food Science and Biotechnology, Department of Yeast Genetics and Fermentation Technology, Universität Hohenheim, Garbenstr. 23, 70599 Stuttgart, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Senn
authors.affiliation: Institute of Food Science and Biotechnology, Department of Process Engineering and Food Powders, Universität Hohenheim, Garbenstr. 25, 70599 Stuttgart, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Gschwind
authors.affiliation: Institute of Food Science and Biotechnology, Department of Process Engineering and Food Powders, Universität Hohenheim, Garbenstr. 25, 70599 Stuttgart, Germany.
authors.forename: Reinhard
authors.initials: R
authors.lastname: Kohlus
mesh_terms: D000388:Air; D056804:Biofuels; D001709:Biotechnology / Q000379:methods*; D003198:Computer Simulation; D000431:Ethanol / Q000378:metabolism*; D005240:Feasibility Studies; D008031:Lignin / Q000378:metabolism; D013696:Temperature; D014867:Water
chemical_list: D056804:Biofuels; D014867:Water; C036909:lignocellulose; D000431:Ethanol; D008031:Lignin
keywords: Air; Bioethanol; Blenke cascade system; Gas stripping; Vapour-liquid equilibrium