Abstract
Recalcitrant wastewater from a combined effluent treatment plant of heterogeneous industrial sector is very complex and often possess intense colour and fluctuating characteristics. In this work, the treatment of such complex effluent using photo-catalysis and Fenton processes is investigated. Studies on the treatment of combined wastewater are scarce. The reduction in colour and COD with photo-catalysis was 10% and 5%, respectively; and with Fenton process it was 80% and 72%, after 2 h. Fenton process appears to be more promising in comparison to photo-catalysis. Optimization of H2O2 & Fe2+ concentrations revealed that maximum reduction in colour and COD occurred at ratio of H2O2:Fe2+ (30:1).
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