Wastewater Ozonation Catalyzed by Iron

The effectiveness of ozone and integrated ozone catalyzed processes with iron plates on industrial wastewater treatment was evaluated. Both processes were tested at different pH values of the industrial wastewater. Ozonation, under optimal conditions of pH 7 and treatment time of 60 mm, reduced the chemical oxygen demand (COD) by 45%, color by 82%, and the turbidity by 55%. The addition of iron plates inside the reactor greatly improved the reduction of COD (80%), color (90%) and turbidity (99%). Thus, it was concluded that the ozonation process catalyzed with iron plates noticeably improves wastewater quality. Additional advantages of the process are that there is no sludge generation and it occurs readily at pH 7.