title: Favouring butyrate production for a new generation biofuel by acidogenic glucose fermentation using cells immobilised on γ-alumina.
abstract: The effect of γ-alumina as a fermentation advancing tool and as carrier for culture immobilisation, regarding VFAs and ethanol production during acidogenic fermentation of glucose, was examined at various process conditions (sugar concentration, pH) and operation modes (continuous with and without effluent recirculation and batch). The results showed that at high initial pH (8.9) the continuous acidogenic fermentation of glucose led to high yields of VFAs and favoured the accumulation of butyric acid. The batch process on the other hand at pH 6.5, favoured the ethanol-type fermentation. The results indicate that in the frame of technology development for new generation biofuels, using γ-alumina as a process advancing tool at optimum process conditions (pH, initial glucose concentration and mode of operation), the produced VFAs profile and ethanol concentration may be manipulated.
authors.affiliation: Food Biotechnology Group, Department of Chemistry, University of Patras, 26500 Patras, Greece.
authors.forename: Kostas
authors.initials: K
authors.lastname: Syngiridis
authors.affiliation: Food Biotechnology Group, Department of Chemistry, University of Patras, 26500 Patras, Greece.
authors.forename: Argyro
authors.initials: A
authors.lastname: Bekatorou
authors.affiliation: Food Biotechnology Group, Department of Chemistry, University of Patras, 26500 Patras, Greece.
authors.forename: Panagiotis
authors.initials: P
authors.lastname: Kandylis
authors.affiliation: Clermont Université, Université Blaise Pascal, Institut Pascal UMR CNRS 6602, Polytech Clermont-Ferrand, 24 avenue des Landais, BP-20206, 63174 Aubière Cedex, France.
authors.forename: Christian
authors.initials: C
authors.lastname: Larroche
authors.affiliation: Food Biotechnology Group, Department of Chemistry, University of Patras, 26500 Patras, Greece.
authors.forename: Maria
authors.initials: M
authors.lastname: Kanellaki
authors.affiliation: Food Biotechnology Group, Department of Chemistry, University of Patras, 26500 Patras, Greece. Electronic address: a.a.koutinas@upatras.gr.
authors.forename: Athanasios A
authors.initials: AA
authors.lastname: Koutinas
mesh_terms: D000537:Aluminum Oxide; D056804:Biofuels; D019149:Bioreactors; D020148:Butyric Acid / Q000378:metabolism*; D000431:Ethanol / Q000378:metabolism; D005285:Fermentation
chemical_list: D056804:Biofuels; D020148:Butyric Acid; D000431:Ethanol; D000537:Aluminum Oxide
keywords: Acidogenic fermentation; Butyric acid; Ethanol; VFAs; γ-Alumina