title: Development of a submerged anaerobic membrane bioreactor for concurrent extraction of volatile fatty acids and biohydrogen production.
abstract: The aim of this work was to study an externally-submerged membrane bioreactor for the cyclic extraction of volatile fatty acids (VFAs) during anaerobic fermentation, combining the advantages of submerged and external technologies for enhancing biohydrogen (BioH2) production from agrowaste. Mixing and transmembrane pressure (TMP) across a hollow fiber membrane placed in a recirculation loop coupled to a stirred tank were investigated, so that the loop did not significantly modify the hydrodynamic properties in the tank. The fouling mechanism, due to cake layer formation, was reversible. A cleaning procedure based on gas scouring and backwashing with the substrate was defined. Low TMP, 10(4)Pa, was required to achieve a 3Lh(-1)m(-2) critical flux. During fermentation, BioH2 production was shown to restart after removing VFAs with the permeate, so as to enhance simultaneously BioH2 production and the recovery of VFAs as platform molecules.
authors.affiliation: Université Clermont Auvergne, Université Blaise Pascal, LABEX IMobS(3), BP 10448, F-63000, F-63171 Clermont-Ferrand, France; Université Clermont Auvergne, Université Blaise Pascal, Institut Pascal, BP 20206, F-63174 Aubière cedex, France; CNRS, UMR 6602, IP, F-63178 Aubière, France.
authors.forename: Zaineb
authors.initials: Z
authors.lastname: Trad
authors.affiliation: Swedish Centre for Resource Recovery, University of Borås, S-50190, Sweden.
authors.forename: Julius
authors.initials: J
authors.lastname: Akimbomi
authors.affiliation: Université Clermont Auvergne, Université Blaise Pascal, Institut Pascal, BP 20206, F-63174 Aubière cedex, France; CNRS, UMR 6602, IP, F-63178 Aubière, France. Electronic address: Christophe.Vial@univ-bpclermont.fr.
authors.forename: Christophe
authors.initials: C
authors.lastname: Vial
authors.affiliation: Université Clermont Auvergne, Université Blaise Pascal, Institut Pascal, BP 20206, F-63174 Aubière cedex, France; CNRS, UMR 6602, IP, F-63178 Aubière, France.
authors.forename: Christian
authors.initials: C
authors.lastname: Larroche
authors.affiliation: Swedish Centre for Resource Recovery, University of Borås, S-50190, Sweden.
authors.forename: Mohammad J
authors.initials: MJ
authors.lastname: Taherzadeh
authors.affiliation: Université Clermont Auvergne, Université Blaise Pascal, Institut Pascal, BP 20206, F-63174 Aubière cedex, France; CNRS, UMR 6602, IP, F-63178 Aubière, France.
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Fontaine
mesh_terms: D057219:Biofouling; D056804:Biofuels; D019149:Bioreactors; D005232:Fatty Acids, Volatile; D005285:Fermentation; D005374:Filtration; D006859:Hydrogen; D008567:Membranes, Artificial; D011312:Pressure
chemical_list: D056804:Biofuels; D005232:Fatty Acids, Volatile; D008567:Membranes, Artificial; D006859:Hydrogen
keywords: Anaerobic membrane bioreactor; Fouling; Submerged membrane; Volatile fatty acids