Enhanced bio-decolorization of azo dyes by co-immobilized quinone-reducing consortium and anthraquinone

YY Su, Yifeng Zhang, J Wang, JT Zhou, XB Lu, H Lu

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In the present study, the accelerating effect of co-immobilized anthraquinone and quinone-reducing consortium was investigated in the bio-decolorization process. The anthraquinone and quinone-reducing consortium were co-immobilized by entrapment in calcium alginate. The co-immobilized beads exhibited good catalytic activity and increased the decolorization rate for many kinds of azo dyes. The reusability of the co-immobilized beads was evaluated with repeated-batch decolorization experiments. After ten repeated experiments, the decolorization rate of co-immobilized beads retained over 92.8% of their original value. Furthermore, acclimatized quinone-reducing consortium was analyzed by denaturing gradient gel electrophoresis (DGGE) and 16S rDNA gene sequencing to get the complete picture of its diversity. This study explored a great improvement of conventional treatment system and the new bio-treatment concept. (C) 2009 Elsevier Ltd. All rights reserved.
Original languageEnglish
JournalBioresource Technology
Issue number12
Pages (from-to)2982-2987
Publication statusPublished - 2009

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