Sphingomonas Paucimobilis: Modeling New Biological Treatment of Reactive Dye Wastewater in SBR Systems Inoculated With Bacteria

This study is conducted on biologically treated wastewater discharged from the textile industry (textiles made of cotton and/or synthetic fiber) using sequencing batch reactor (SBR) laboratory systems. The bioflocculant is effective in flocculating a kind of reactive soluble dye (Cibacron yellow FN_2R) in aqueous solution. A bioflocculant–producing bacterium was isolated from wastewater and sediments of Close Drainage Systems (CDS) located at the Prai area of Penang, Malaysia. Reactive dyes have been identified as problematic compounds in wastewater from textile industries as they are water soluble and cannot be easily removed by conventional aerobic biological treatment systems. The treat-ability of a reactive dye (Cibacron yellow FN_2R) by sequencing batch reactor and the influence of the dye on concentration on system performance were investigated in this study. Employing reactive dye by phingomonas paucimobilis bacteria at sequence batch reactor is a novel approach of dye removal. The dye concentrations were adjusted to500, 1000, 1500 and 2000 mg/L in the reactors R1, R2, R3 and R4, Experiments were analyzed for Chemical Oxygen Demand (COD) and Mixed Liquor Suspended Solids (MLVSS), dye and colour removal everyday. No significant influence on COD removal efficiency was observed. By altering the dye concentration. The dye removal efficiency was decreased by increasing the dye concentration. Highest dye removal efficiency was at a dye concentration of 500mg/L. Results show that COD reduction increased at 5000mg/L MLSS with respect to F/M ratio. Modeling for dye removal with different concentrations COD at two MLSS, 3000 and 5000 mg/L are performed by Linear Regression Analysis.

کلیدواژه ها:

Biological treatment ، sequencing batch reactor ، reactive dye ، COD reduction