Potential applications of indigenous bacterial consortium for the treatment of textile effluents and condition optimization by RSM technique

Naeem Abbas, Naqi Hussain, Muhammad Umar Farooq Gohar, Farhat Zaheer, Muhammad Hamza, Muhammad Yasir and Aqeel Abbas

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In the present investigation, dyes effluent samples were randomly selected and subjected to biological treatment. The physicochemical characterization such as pH, turbidity, chemical oxygen demand (COD) biological oxygen demand (BOD), conductivity, color and total dissolved solids (TDS) were studied before and after treatment. The biological treatment was employed on selected dye effluent samples. These isolates were depicted as B1 to B17.  High reduction in values of COD, BOD and TDS were observed for B7 in all the effluent samples, while B11, B4 and B15 showed moderate responses. The other isolates did not show any significant response regarding improvement in water quality parameters. For optimal medium and culture conditions response surface methodology was used and up to 50% color and COD removal was observed when B7 was applied on the samples in accordance with analysis of variance (ANOVA). Furthermore, B7 isolate revealed an efficient performance and was identified as Bacillus subtilis by using morphological, biochemical and genomic sequencing.