Decolorization potential of burkholderia glumae for reactive textile dye removol

Abstract

Efficacy of commercial microbial inocula, identified as Burkholderia gluma, was evaluated in a laboratory for textile dye biodegradation. Synthetic textile wastewater contained two azo reactive dyes (Remazol Red RGB [RR] and Cibacron Red C2G [CR]) and two anthraquinone dyes (Remazol Navy Blue [RB] and Cibacron Turquoise [CT]) and also supplemented with glucose and yeast extract as nutrients. The decolorization condition was found to be effective at pH 7-8 and 200 mg/l of initial dye concentration. Cassava starch and fertilizer supplied as a nutrient in the synthetic wastewater decreased the cell growth and dye biodegradation. In an aerated cultivation, cell growth increased during approximately first 3 days but decreased the dye removal efficiency. Anoxic condition was found to rapidly induce the decolorization potential. Two subsequent stages integrating anoxic-aerobic mode was designed to increase suspended biomass and completely degrade the aromatic dye. The dye removal efficacy was found to be 76% for the real wastewater.