Improving the removal efficiency of chemical oxygen demand and total organic carbon from industrial wastewater by magnetic forced vortex and ozone

Some treatments of industrial wastewater suffer from the difficulty of removing or reducing pollution by organic and inorganic materials. This research was conducted to investigate the effect of applying advanced treatment method by using ozone and a magnetic field combined with a forced vortex on the removal efficiency of chemical oxygen demand (COD) and total organic carbon (TOC) from industrial wastewater. Samples of the wastewater of Addora Electric Station, which is located in the southern part of Baghdad, were collected just before being discharged to Tigris River. Experiments on treating the wastewater samples and tests were conducted at the laboratories of Iraqi Ministry of Science and Technology. The experimental treatments were conducted under different flow rates, values of pH, and detention time. The applied flow rates are 0.25, 0.5, 0.75, and 1.0 L/min. Four values of pH of the wastewater were applied, which are 3.0, 5.0, 7.5 and 9.0. The effect of the detention time of 30, 50, 70, and 90 min were investigated. The removal efficiency of COD and TOC when using treatment by ozone and magnetic field combined with forced vortex were compared to that results obtained by using treatment with ozone alone. The results indicated that effect of vortex and magnetic with ozone have a positive effect on COD and TOC removal. The most significant removal efficiency detected COD and TOC were 98% and 97%, respectively, obtained at pH 9.0 and detention time of 90 min as compared to the control samples.