Abstract
The dye removal bacteria Brevibacillus laterosporus (TS5) was isolated from dye contaminated soil, and it’s identified by 16S rDNA sequencing method. The prospective bacterial strain exhibited a highest decolorization (97.8%) in Luria-Bertani broth medium. Among the operational factors, Plackett-Burman design, experimental results indicated that pH, incubation period, and yeast extract significantly contributed for the dye decolorization. Also, dye concentration, starch, temperature, and inoculum size noted as insignificant factors on dye decolorization. Central composite design applied for optimization of important factors to enhance the dye decolorization by Brevibacillus laterosporus (TS5). The optimal values of significant factors were determined by the Response surface methodology (RSM) as follows: 0.60% (w/v) yeast extract, 7.23 pH and 61.45 hrs incubation period, which assisted for Brevibacillus laterosporus (TS5) to attain 90.66% dye removal. Brevibacillus laterosporus (TS5) showed 90.08% decolorization in validation experiments by the support of optimal factors, and implies that explored strain could be a suitable candidate for bioremediation of dye containing effluents.
Highlights
The disposal of waste from textile industries is considered as major environmental problem in the worldwide
The present study focused on the exploration of textile dye decolorizing bacteria Brevibacillus laterosporus (TS5) isolated from the dye contaminated soil, and its dye decolorization efficacy was enhanced via optimization by screening of influencing factors in dye removal process with
The present study demonstrated that the decolorization potentiality, and statistical optimization of bacterium
Summary
The disposal of waste from textile industries is considered as major environmental problem in the worldwide. The discharging of textile industry effluent into the ecosystem is hazardous one, as it contains bio-recalcitrant dye stuffs (Sarayu and Sandhya 2012). Textile effluent includes a mixture of dyes, organic and inorganic chemicals (Doble and Kumar 2005). Dyes are recognized as a first pollutant in textile waste water, since it possesses higher visibility in colored effluent (Kilic et al.2007). Azo dyes are normally recognized as the most imperative group of synthetic dyes. They are carcinogenic aromatic compound that disturbs the transparency, gas solubility nature of water bodies, and inhibits the growth of aquatic plants
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