ISOLATION AND SCREENING OF DYE DEGRADING MICROORGANISMS FROM INDUSTRIAL WASTE OF DHAKA CITYMD. MAHMUD RAHMAN, KAMAL KANTA DAS, KHUSBU AKTAR AND FARAHNAAZ FEROZ
Textile and dying industrial effluents are the major environmental concern for the present world. Untreated or partially treated effluent can contain toxins for environment and human beings. And bioremediation is one of most advance and ecofriendly approach for effluent treatment. In this study, different effluent and soil samples were collected from textile industry of Dhaka city. Here total 12 bacteria were isolated from collected samples using spread plate method. Among them Staphylococcus spp., Bacillus spp. and Enterobacter spp. are predominated which is confirmed by biochemical methods. All thus isolates were used for the further studies like dye degrading ability using decolorizing activity. Here, decolorizing activities of the isolated bacteria were measured using a photo electric colorimeter after aerobic incubation in different time intervals of the isolates in direct red in nutrient broth containing 0.1% of dye. In this study, some of isolates have capabilities to degrade dyes completely within eight days. So, the degrading efficacy of isolated bacteria indicate that these bacteria can be used in large scale treatment in textile industry.