Study on decolorization of bromamine acid by Flavobacterium sp..

The Flavobacterium sp. BX26 which could efficiently decolor bromamine acid was screened from the polluted soil. By monitoring the change of cell turbidity and bromamine acid absorbance, the effects of carbon source concentration, bromamine acid concentration, using bromamine acid as the sole source of carbon, nitrogen and sulfur on the growth of BX26 and decolorization of bromamine acid were investigated. The results show that the decolorization of bromamine acid is catalyzed by decolorizing enzyme which is an inducible extracellular one. Enough source of nitrogen and sulfur is needed for the induction and production of the enzyme; but carbon source isn't necessary. Bromamine acid can promote markedly the growth of BX26. Meanwhile, the strain shows high activity to degrade bromamine acid even at its concentration of 1000mg/L. Although the strain can't use bromamine acid as the sole source of carbon, nitrogen and sulfur, it can use its decolorization product as the sole source of carbon.