Enhanced bio-decolorization of azo dyes by co-immobilized quinone-reducing consortium and anthraquinone |
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| Authors: | Yanyan Su Yifeng Zhang Jing Wang Jiti Zhou Xuebin Lu Hong Lu |
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| Institution: | 1. School of Environmental and Biological Science and Technology, Dalian University of Technology, No. 2, Linggong Road, Dalian, Liaoning 116023, PR China;2. Department of Environmental Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark;3. School of Environment Science and Technology, Tianjin University, Tianjin 300072, PR China |
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| Abstract: | 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. |
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| Keywords: | Bio-decolorization Co-immobilization Quinone-reducing consortium Anthraquinone 16S rDNA gene |
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