Biotransformation of a Textile Azo dye Acid Yellow 25 by Marinobacter gudaonensis AYAF-130

Abstract

Biotransformation is the process of altering an organic compound's form to reduce its toxicity and persistence. A marine bacterium capable of degrading the textile azo dye Acid Yellow 25which was isolated from natural environments on a nutrient medium containing high salinity and the dye. The isolate AYAF-130 was obtained and was identified as Marinobacter gudaonensis AYAF-130 based on biochemicals and phylogenetic analysis based on 16s rRNA gene sequence. The isolate was able to decolorize the dye up to 98% in a nutrient medium and up to 100% in the presence of different co-substrates. The degradation of the dye was confirmed by the GC-MS analysis. The isolate reduced the COD of the dye up to 65%.