DISASTER RISK REDUCTION for REACTIVE DYE WASTEWATER in SBR SYSTEMS

Reactive dyes have been identified as problematic compounds in wastewater from textile industries and cannot be easily removed by conventional aerobic biological treatment systems. A bioflocculant–producing bacterium wasisolated from wastewater and sediments of Close Drainage Systems (CDS) located at Penang, Malaysia. The purposeof this study is employing reactive dye by Sphingomonas paucimobilis bacteria at sequence batch reactor for dyeremoval and disaster risk reduction for dye wastewater. Two separate experiments, with different range of the dyewastewater concentrations and dosages of Sphingomonas paucimobilis were conducted. The experiment was carried out for Sphingomonas paucimobilis acclimatization on the different dye concentration of wastewater in four reactors(R١, R٢, R٣ and R٤). All experiments were analyzed for chemicals oxygen demand (COD) and mixed liquor suspended solids (MLSS) and colour removal every day. Results show that COD reduction increased at ٥٠٠٠mg/L MLSS with respect to F/M ratio. Modelling for dye removal with different concentrations COD at two different MLSS concentrations (٣٠٠٠ and ٥٠٠٠ mg/L) were performed by regression analysis.

Keywords:

Biological treatment , sequencing batch reactor , Cibacron yellow FN_٢R , COD reduction