title: Combination of adsorption and biodegradation processes for textile effluent treatment using a granular activated carbon-biofilm configured packed column system.
abstract: The objective of this study was to investigate the feasibility of using a granular activated carbon-biofilm configured packed column system in the decolorization of azo dye Acid Orange 7-containing wastewater. The Acid Orange 7-degrading microbial from anaerobic sequencing batch reactor which treating the azo dye-containing wastewater for more than 200 d was immobilized on spent granular activated carbon (GAC) through attachment. The GAC-biofilm configured packed column system showed the ability to decolorize 100% of the azo dye when working at high loading rate of Acid Orange 7 at 2.1 g/(L x d) with treatment time of 24 h. It was observed that the decolorization rate increased along with the increasing of initial Acid Orange 7 concentrations, until it reached an optimum point at about 0.38 g/h with initial Acid Orange 7 concentrations of 1,150 mg/L and the decolorization rate tend to be declined beyond this concentration.
authors.affiliation: Department of Applied Chemistry, Oita University, Oita 870-1192, Japan. ongsoonan@yahoo.com
authors.forename: SoonAn
authors.initials: S
authors.lastname: Ong
authors.forename: Eiichi
authors.initials: E
authors.lastname: Toorisaka
authors.forename: Makoto
authors.initials: M
authors.lastname: Hirata
authors.forename: Tadashi
authors.initials: T
authors.lastname: Hano
mesh_terms: D000042:Absorption; D001391:Azo Compounds / Q000737:chemistry*; D001557:Benzenesulfonates / Q000737:chemistry*; D001673:Biodegradation, Environmental; D018441:Biofilms; D019149:Bioreactors; D002244:Carbon / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry; D004305:Dose-Response Relationship, Drug; D007220:Industrial Waste; D008855:Microscopy, Electron, Scanning; D013783:Textile Industry; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D001557:Benzenesulfonates; D004396:Coloring Agents; D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D002244:Carbon; C014722:2-naphthol orange