Study of biodegradation of a dye indegocarmin by system containing Acinetobacter baumannii

Colored sewage discharge into rivers and lakes, resulting in decreased water quality and reduce the solubility of gases. highly toxic, carcinogenic and mutagenic can be noted as the problems that dyes created for mammals and aquatic organisms. For the removal of dyes there are two physical and chemical methods. Due to the limitations of this methods we can take biodegradation method which is cheaper and more effective as an alternative for old methods. In biodegradation method, microorganisms such as bacteria, fungi, algae and actioiomycetes are used. Due to the fact that these microorganisms are better and more compatible absorbent Using These microorganisms for decolonization is expanding day by day. In this study, the bacterium Acinetobacter baumannii was used for the biodegradation indegocarmin. After the bacteria resistant to indegocarmin color, the effect of time, initial dye concentration, pH and temperature effects were studied to determine the percentage degredation. The optimum conditions of temperature 55 ° C and pH was about 10, with the requirements of 100 mg /L Indigocarmin of color were analyzed in a period of 66 hours at the rate of 88/98 percent.