Combination of adsorption and biodegradation processes for textile effluent treatment using a granular activated carbon-biofilm configured packed column system.

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.

[1]  W. G. Characklis,et al.  Dynamics of biofilm processes: methods , 1982 .

[2]  Alberto Rozzi,et al.  Textile wastewater reuse: Ozonation of membrane concentrated secondary effluent , 1999 .

[3]  Ibrahim M. Banat,et al.  Microbial decolorization of textile-dye-containing effluents A review , 1996 .

[4]  H. Horitsu,et al.  Some properties of azoreductase produced byPseudomonas cepacia , 1987, Bulletin of environmental contamination and toxicology.

[5]  Owen P. Ward,et al.  Biodegradation of dimethyl phthalate with high removal rates in a packed-bed reactor , 2002 .

[6]  C. Cerniglia,et al.  The reduction of azo dyes by the intestinal microflora. , 1992, Critical reviews in microbiology.

[7]  V. Wray,et al.  Monitoring Key Reactions in Degradation of Chloroaromatics by In Situ 1H Nuclear Magnetic Resonance: Solution Structures of Metabolites Formed from cis-Dienelactone , 2002, Journal of bacteriology.

[8]  G. Lettinga,et al.  The role of (auto)catalysis in the mechanism of an anaerobic azo reduction , 2000 .

[9]  Soon-An Ong,et al.  Granular activated carbon-biofilm configured sequencing batch reactor treatment of C.I. Acid Orange 7 , 2008 .

[10]  P. Bishop,et al.  Characterization of aerobic azo dye-degrading bacteria and their activity in biofilms , 1997 .

[11]  J. S Knapp,et al.  Decolorization of an azo dye by unacclimated activated sludge under anaerobic conditions , 2000 .

[12]  Soon-An Ong,et al.  Decolorization of azo dye (Orange II) in a sequential UASB–SBR system , 2005 .

[13]  P. Bishop,et al.  Simultaneous anaerobic and aerobic degradation of the sulfonated azo dye Mordant Yellow 3 by immobilized cells from a naphthalenesulfonate-degrading mixed culture , 1996, Applied Microbiology and Biotechnology.

[14]  T. Panswad,et al.  Effect of chemical structures of reactive dyes on color removal by an anaerobic-aerobic process , 2000 .

[15]  S. Pavlostathis,et al.  Decolorization and toxicity screening of selected reactive azo dyes under methanogenic conditions , 1998 .

[16]  H. H. Fang,et al.  Anoxic treatment of low-strength wastewater by immobilized sludge , 1997 .

[17]  P. Dubin,et al.  Reduction of azo food dyes in cultures of Proteus vulgaris. , 1975, Xenobiotica; the fate of foreign compounds in biological systems.

[18]  K. Chung,et al.  Reduction of azo dyes by intestinal anaerobes , 1978, Applied and environmental microbiology.

[19]  E. Carliell,et al.  Microbial decolourisation of a reactive azo dye under anaerobic conditions , 1995 .

[20]  Sanjeev Chaudhari,et al.  Anaerobic decolorisation of simulated textile wastewater containing azo dyes. , 2002, Bioresource technology.

[21]  P. Grau.  Textile Industry Wastewaters Treatment , 1991 .

[22]  Ping-Yi Yang,et al.  Nitrate removal using a mixed-culture entrapped microbial cell immobilization process under high salt conditions , 1995 .

[23]  B. Donlon,et al.  Biodegradation of selected azo dyes under methanogenic conditions , 1997 .