Efficient degradation of Bismarck brown by the halotolerant Virgibacillus dokdonensis VIT P14

摘要

Biodegradation is defined as the process in which microorganisms are exploited for their capacity to degrade the hazardous compounds. Especially, the degradation of the dyes by the, microbes has attained great interest due to low cost simple process and maintenance conditions. Keeping this in mind, we have exploited the novel organism Virgibacillus dokdonensis VIT P14, isolated from Kumta coast (Karnataka), for degrading the azo dye Bismarck brown. The maximum degradation of about 91.2% was obtained in the media containing 1 mg of the dye along with the loopful of inoculum grown for 24 h in the shaking condition. Effect of chemical and physical parameters such as pH, temperature, dye concentration, shaking and static conditions, sodium chloride concentration, glucose concentration, urea concentration were also studied in detail with respect to bacterial growth in the presence of the azo dye. The results revealed significant parameters that contributed to efficient dye degradation. The ability of the organism to grow under saline conditions and in the presence of the azodye makes it a possible candidate for bioremediation of textile waste water.