Decolourization of Textile Dyes with Biotechnological Potent Bacterial Isolates

Abstract

The discharge of effluents from the textile industries to aqueous bodies is currently one of the biggest concerns of environmentalists. Dyes used in the textiles industries create pollution in the environment. The application of biological treatments is one of the most economically viable systems to decolorized effluents using bacterial isolates (TBSP, TBSP2). In this sense, studies were carried out tests for the removal of colour of Congo red, Methyl orange, Brilliant Blue, using bacterial strain. Firstly, all two bacterial strains were isolated from different environments. Then, tests were performed to verify which concentration of the dye would be limit for the growth of each microorganism. In addition to decolourization tests, other parameters such as pH, biomass, total proteins and toxicity of the metabolites formed were also monitored. The bacterial strain, isolated from the river environment, was able to decolourization concentrations of 100ppm to upto 700ppm respectively for the, Coomasie Brilliant blue, Methyl orange and Congo red. TBSP1 and TBSP2 discoloured respectively at concentrations 100ppm to 700 ppm , while the intercropping (consortium) of the two bacteria discoloured at a concentration of 700ppm for the three dyes tested individually. In these cultivation conditions, the decrease in the quality rate varied with the lowest rate observed in the assay containing Congo Red and Congo red dye and the highest removal rate in the assay containing the intercropping and the CBBR dye. The results shows that the bacteria biotechnological potent bacteria present initial pot in the decolourization of textile dyes, initial pot were shows the ability to decolorize azo dyes.