Microbial Decolorization of Remazol Brilliant Orange 3R, Remazol Black B & Remazol Brilliant Violet Dyes in a Sequential Anaerobic-Aerobic System

Maulin P Shah^1, , Kavita A Patel¹, Sunu S Nair¹ and A M Darji¹

¹Industrial Waste Water Research Laboratory, Applied & Environmental Microbiology Lab, Enviro Technology Limited (CETP), Gujarat, India

Cite this paper:
Maulin P Shah, Kavita A Patel, Sunu S Nair and A M Darji. Microbial Decolorization of Remazol Brilliant Orange 3R, Remazol Black B & Remazol Brilliant Violet Dyes in a Sequential Anaerobic-Aerobic System. International Journal of Environmental Bioremediation & Biodegradation. 2013; 1(1):6-13. doi: 10.12691/ijebb-1-1-2

Abstract

A sequential anaerobic–aerobic treatment process based on mixed culture of bacteria isolated from textile dye effluent-contaminated soil was used to degrade reactive azo dyes Remazol Brilliant Orange 3R. Remazol Black B and Remazol Brilliant Violet 5R. Treating synthetic dye wastewater with the combination anaerobic and aerobic process showed that the majority of colors were removed by the anaerobic process, on the other hand the majority of chemical oxygen demand (COD) was removed in the subsequent aerobic process. Samples from combined anaerobic–aerobic system at the beginning of anaerobic process, after anaerobic process and after subsequent aerobic process were analyzed by high performance liquid chromatography (HPLC). The results suggested that under anaerobic conditions, the azo dyes were reduced and the aromatic amines were generated by the bacterial biomass. After re-aeration of the synthetic dye wastewater, these amines were further degraded by the same isolates. Thus, total degradation of reactive azo dyes was achieved by using an anaerobic–aerobic treatment.

Keywords:
Remazol Brilliant Orange 3R. Remazol Black B and Remazol Brilliant Violet 5R Sequential Anaerobic-Aerobic System

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