Abstract
Treatment of textile dye wastewater was carried using Pleurotus floridanus in a batch reactor. Response surface methodology (RSM) was used to optimize the process parameters like pH, temperature, agitation speed and dye wastewater concentration for the decolorization of textile dye wastewater. The optimum conditions for the maximum decolorization was: pH 6.6, temperature 28.8 °C, agitation speed 183 rpm and dye wastewater concentration 1:2. From the results it was found that, the linear effect of agitation speed and initial textile dye wastewater concentration were more significant than other factors for the textile dye wastewater treatment. At these optimized conditions, the maximum decolorization and COD reduction was found to be 71.2 and 80.5 %, respectively. Kinetics of textile dye degradation process was studied by various models like first order, diffusional and Singh model. From the results it was found that the degradation follows first order model with R2 value of 0.9550.
Highlights
Dyes are synthetic, complex, ionizing, aromatic structures that are responsible for their stability against light, sweat, heat, chemical oxidant, etc. (Aksu and Tezer 2005)
From the results it was found that, the linear effect of agitation speed and initial textile dye wastewater concentration were more significant than other factors for the textile dye wastewater treatment
Kinetics of textile dye degradation process was studied by various models like first order, diffusional and Singh model
Summary
Complex, ionizing, aromatic structures that are responsible for their stability against light, sweat, heat, chemical oxidant, etc. (Aksu and Tezer 2005). Are some of the methods commonly used for the decolorization of dye wastewater (Ansari and Thakur 2006; Zhang et al 2002; Rajeshkannan et al 2010, 2011). These methods are mostly ineffective, expensive and produce side reactions, high sludge and by products formation and not suited to degrade all dyes, etc. (Chang et al 2001; Khehra et al 2005) Among these microorganisms, white rot fungi are the most intensive studied dye decolorizing microbes and it produce large quantity of extra cellular enzymes that helps to remove dyes from industrial effluent and they have ability to resist unfavorable environmental conditions (Bumpus 1998; Pointing 2001)
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