Membrane Contactors for Textile Wastewater Ozonation
This paper deals with the application of a membrane contactor for the ozone treatment of textile wastewater. Ceramic (?-Al2O3) membranes were chosen because of their ozone resistance. A thin metal oxide (TiO2 and ?-Al2O3) 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.
membrane contactors textile wastewater ozonation reuse