Enhanced bio-decolorization of azo dyes by co-immobilized quinone-reducing consortium and anthraquinone.
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.
Su
Yanyan
Y
School of Environmental and Biological Science and Technology, Dalian University of Technology, No. 2, Linggong Road, Dalian, Liaoning 116023, PR China. suyanyan_1982@hotmail.com
Zhang
Yifeng
Y
Wang
Jing
J
Zhou
Jiti
J
Lu
Xuebin
X
Lu
Hong
H
D000880:Anthraquinones / Q000378:metabolism*; D001391:Azo Compounds / Q000378:metabolism*; D001421:Bacteria, Anaerobic / Q000145:classification / Q000378:metabolism*; D016227:Benzoquinones / Q000378:metabolism*; D018914:Cells, Immobilized; D018920:Coculture Techniques / Q000379:methods; D004396:Coloring Agents / Q000378:metabolism*; D010084:Oxidation-Reduction; D013045:Species Specificity; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000378:metabolism*; D018508:Water Purification / Q000379:methods*
D000880:Anthraquinones; D001391:Azo Compounds; D016227:Benzoquinones; D004396:Coloring Agents; D014874:Water Pollutants, Chemical; C004532:quinone