Eco-sustainable bioremediation of industrial azodye micropollutants by extremophilic plant growth promoting bacterium Halomonas desertis G11

Application of extremophilic plant growth promoting bacteria (PGPB) and their enzymes in bioremediation have been received increasing interest due to eco-friendly nature effectiveness for bio treatment diverse industrial micro pollutants. In this work, the azo-dye decolorization potential halophilic PGPB Halomonas desertis G11 was evaluated optimized using central composite experimental design response surface methodology. Interestingly, increase pH NaCl concentration accelerated dye decolorization. The model predicted a maximum removal BEZACTIV blue S-2G (80%) at optimal operating conditions (dye 50 mg/L, inoculum size 1.0%, 8.2, 5.0% incubation time 10 days). predictions are good agreement with data, thereby providing soundness developed model. biodecolorization under pressures high salinity alkalinity seems be correlated azoreductase activity. gene encoding FMN-dependent NADH azo-reductase from bacterium H. identified structure catalytic mechanism decolorizing enzyme were elucidated. Results study provide evidence application producing as novel candidate biological sediments wastewaters contaminated by azo-dyes.