title: Membrane contactors for textile wastewater ozonation.
abstract: This paper deals with the application of a membrane contactor for the ozone treatment of textile wastewater. Ceramic (alpha-Al(2)O(3)) membranes were chosen because of their ozone resistance. A thin metal oxide (TiO(2) and gamma-Al(2)O(3)) layer was deposited on the membrane surface to eliminate large defects. Membranes were characterized by bubble pressure and gas permeability tests. Mass transfer coefficients were calculated by using the double-film theory. Decolorization kinetics were studied with model dye solutions. Decolorization experiments with a real exhausted dyebath (untreated and after biological treatment) were also carried out. The potential advantages of membrane contactors for the treatment of these types of effluents are demonstrated.
authors.affiliation: Tecnotessile S.r.l., via del Gelso 13, Prato, Italy. chemtech@tecnotex.it
authors.forename: Gianluca
authors.initials: G
authors.lastname: Ciardelli
authors.forename: Ingrid
authors.initials: I
authors.lastname: Ciabatti
authors.forename: Laura
authors.initials: L
authors.lastname: Ranieri
authors.forename: Gustavo
authors.initials: G
authors.lastname: Capannelli
authors.forename: Aldo
authors.initials: A
authors.lastname: Bottino