Application of Advanced Oxidation Processes for the Treatment of Color and Chemical Oxygen Demand of Pulp and Paper Wastewater

The present study was conducted in order to investigate the efficiency of different advanced oxidation processes both individually and combination with biological method for removal color chemical oxygen demand (COD) from wastewater pulp paper industry. Advanced include ozone, Fenton, hydrogen peroxide, photo-Fenton. Biologically treated successively subjected (AOPs). optimum conditions ozone treatment raw were found be a contact time 9 min pH 5 at fixed dose 41.22% 88.53% COD. Similar biologically showed 46.36% 95.92% photo-Fenton process also an comparable wastewater, resulting 39.85% (color) 90.13% 41.34% 94.29% wastewater. Each had 12 h. Fenton more than 26.30% 86.33% oxidation, however, 26.62% 84.49% COD Hydrogen peroxide 28.45% 85.13% 39.48% 86.53% results treatments indicated that higher efficiencies can achieved when they are used as pre-treatments. Biological is cost-effective but it has less removal. In one AOPs, either pre- or post-treatment under controlled dose, increased efficiency, making feasible larger scales.