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Articles by Satyendra Kumar Garg
Total Records ( 2 ) for Satyendra Kumar Garg
  Satyendra Kumar Garg , M. Tripathi and N. Lal
  In the present study, different approaches are being compared for the decolorization of reactive orange 4 monoazo dye by Bacillus cereus isolate under varied cultural and nutritional conditions. By employing conventional one-factor-at-a-time approach, the bacterial strain exhibited decolorization activity over a wide range of pH (7.0-9.0), temperature (30-38°C), dye concentration (50-200 mg L–1 MSM) and inoculum size (1.0-6.0%, v/v), with peak activity (68.2% color removal) at pH 8.0, 35°C, 50 mg dye L–1 MSM and 4.0% (v/v) inoculum in the presence of 1.0% (w/v) glucose as carbon/energy source and 0.2% (w/v) ammonium nitrate within 72 h incubation. Under response surface methodology (RSM using Box-Behnken design) approach, the dye decolorization enhanced to 100% at optimized 40 mg reactive orange L–1 MSM, glucose 1.0% (w/v) and ammonium nitrate 0.2% (w/v) during 72 h of incubation. The dye decolorization time was advanced by 12 h in bioreactor trial and 100% color removal was achieved within only 60 h incubation. In future experimentation, we envisage to test the potential of our isolate for the decolorization of other variety of azo dyes, mixture of dyes as well as the real textile effluent.
  Satyendra Kumar Garg and Manikant Tripathi
  Wastewater from the textile industries contains a variety of pollutants, particularly dyes. In this review, different methods used for decolorization and detoxification of azo dyes have been discussed. Various physical, chemical and biological treatment methods are being employed for decolorization of azo dyes. The majority of treatment methods work either by concentrating the color in to sludge, solid supports or by complete destruction of the dye molecules. Physical and chemical methods employed for textile wastewater treatment are insufficient, not always environment friendly and usually generate unacceptable levels of secondary pollution in the form of sludge. Bioremediation is being viewed as a clean and practicable alternative means to remediate color from dye containing wastewaters. The ability of microorganisms to decolorize and metabolize dyes has been well established. The use of bioremediation based technologies for treatment of textile azo dyes may be a more viable option for sufficiently cleaning dye containing wastewaters hazardous to human health and to the environment.
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