title: Response surface methodology for optimization of medium for decolorization of textile dye Direct Black 22 by a novel bacterial consortium.
abstract: Decolorization and degradation of polyazo dye Direct Black 22 was carried out by distillery spent wash degrading mixed bacterial consortium, DMC. Response surface methodology (RSM) involving a central composite design (CCD) in four factors was successfully employed for the study and optimization of decolorization process. The hyper activities and interactions between glucose concentration, yeast extract concentration, dye concentration and inoculum size on dye decolorization were investigated and modeled. Under optimized conditions the bacterial consortium was able to decolorize the dye almost completely (>91%) within 12h. Bacterial consortium was able to decolorize 10 different azo dyes. The optimum combination of the four variables predicted through RSM was confirmed through confirmatory experiments and hence this bacterial consortium holds potential for the treatment of industrial waste water. Dye degradation products obtained during the course of decolorization were analyzed by HPTLC.
authors.affiliation: BRD School of Biosciences, Sardar Patel Maidan, Sardar Patel University, Vallabh Vidyanagar 388120, Gujarat, India. sarayu124@yahoo.com
authors.forename: Sarayu
authors.initials: S
authors.lastname: Mohana
authors.forename: Shalini
authors.initials: S
authors.lastname: Shrivastava
authors.forename: Jyoti
authors.initials: J
authors.lastname: Divecha
authors.forename: Datta
authors.initials: D
authors.lastname: Madamwar
mesh_terms: D000704:Analysis of Variance; D001391:Azo Compounds; D001419:Bacteria / Q000187:drug effects / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D001673:Biodegradation, Environmental / Q000187:drug effects; D002855:Chromatography, Thin Layer; D004396:Coloring Agents / Q000378:metabolism*; D003470:Culture Media; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005947:Glucose / Q000494:pharmacology; D009281:Naphthalenes / Q000378:metabolism*; D010802:Phylogeny; D012044:Regression Analysis; D015203:Reproducibility of Results; D013784:Textiles / Q000382:microbiology*