Biological decolourzation quinone compound enhancing azo dyes

Enhanced action of azo dyes decolourzation by quinone-reducing community using redox mediators was inspected. This bacterium community could enhance the bio-decolourization of many kinds of azo dyes using AQDS (2,6-dioulfonic acid anthracene quinine) as a redox mediator, in which the adaptable conditions of active Red KE-3B were pH 6~9; extra added glucose concentration 0.05%~0.10%; AQDS concentration 10~100mg/L and dye initial concentration ≤600mg/L. Under these conditions, the maximal decolourization rate was about 90%, the time of reaching the maximal decolourization rate was 18h. Meanwhile, it was found that the community could enhance biological decourization of azo dye active red KE-3B using many anthraquinone quinine dyes intermediate as redox mediator.