Detoxification of azo dye waste by Microorganisms

点击翻译按钮获取中文摘要

Most of aromatic amines resulting from the cleavage of azo dyes are potentially carcinogenic. Therefore aromatic amines are should be treated and detoxified completely. The main objective of this study is to observe microbial decolorization and detoxification of azo dyes. 1) Bradyrhizobium sp. No.168, which degraded sulfanilic acid resulting from the cleavage of azo bond of Orange II, was isolated. The combination of strain No.168 and azo dyes decolorizing microorganisms decolorized Orange II and degraded sulfanilic acid resulting from the decolorization of Orange II. The continuous decolorization of Orange II and degradation of sulfanilic acid was accomplished by immobilized these microorganisms. 2) 4-amino-1-naphtalenesulfonate resulting from the decolorization of Bordeaux S was degraded by laccase produced from white-rot fungi. The continuous degradation of 4-amino-1-naphtalenesulfonat was accomplished by immobilized laccase on alumina beads.