The current study demonstrated there are strong linear correlations (R2 > 0.96) between the extent of ozone
degradation after 60 second reaction time and COD concentration for AW I and canteen wastewater in concentration
range of 0-80 mg L-1. The ozone degradation rate and COD concentration of AW I and canteen wastewater exhibits
strong linear correlation (R2 > 0.92) in the same COD range. Test with various types of wastewaters is required to
evaluate the reliability and accuracy of this method compared to the standard method.