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Membrane Contactors for Textile Wastewater Ozonation
Author(s) -
CIARDELLI GIANLUCA,
CIABATTI INGRID,
RANIERI LAURA,
CAPANNELLI GUSTAVO,
BOTTINO ALDO
Publication year - 2003
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.2003.tb05990.x
Subject(s) - membrane , contactor , mass transfer , wastewater , rotating biological contactor , chemical engineering , chemistry , ceramic membrane , ozone , effluent , chromatography , materials science , waste management , pulp and paper industry , organic chemistry , biochemistry , physics , power (physics) , quantum mechanics , engineering
A bstract : This paper deals with the application of a membrane contactor for the ozone treatment of textile wastewater. Ceramic (α‐Al 2 O 3 ) membranes were chosen because of their ozone resistance. A thin metal oxide (TiO 2 and γ‐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.