Abstract
Studies on the treatment of simulated acid metal complex azo dye (C.I.Acid black 210) wastewater was carried out in anoxic-aerobic-anoxic microenvironment using a periodically operated sequencing batch reactor (SBR) with suspended growth configuration at two organic loading rates (0.56 Kg COD/cum-day and 0.75 Kg COD/cum-day). The experimental data revealed the effective performance of the SBR system in the process of azo dye minerilazation, which may be attributed to the prevailing anoxic microenvironment present during the cycle operation. The reactor showed rapid startup (within 22 days) and stabilization (within 6 days after loading) compared to conventional continuously operated systems. Organic loading (shock loads) rates have shown relatively less effect on the performance.
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