Treatment of pesticide intermediate industrial wastewater using different advanced treatment processes

Now-a-days industrial wastewater treatment has been a major preventive step against the pollution of natural water resources. This wastewater contains different type of contaminants and it needs prior treatment for its discharge in to water body. This study deals with the treatment of pesticide intermediate industrial wastewaters using individual treatment processes such as fenton, photo-fenton, electro-oxidation, rotavapor distillation, and coagulation. Optimization of operational parameters such as reaction time and fenton reagent dosages in fenton process, coagulant dosage in coagulation, inter-electrode distance, reaction time and pH in electro-oxidation process had been carried out in this study for the optimal reduction of chemical oxygen demand (COD). Using optimised dosages of fenton reagents FeSO 4 .7H 2 O of 0.1 g/l, H 2 O 2 of 1.75 g/l for 250 ml of sample (i.e. Fe +2 /H 2 O 2 = 0.050) in the fenton treatment of pesticide intermediate industrial wastewater an optimum COD. Removal of 51.1% was obtained at a reaction time of 180 min and at a pH of 3. Where as in photo-fenton process, an optimum COD removal of 53.33% was obtained at a reaction time of 180 min. Using rotavapor distillation, highest percentage removal of COD (62.22%) was obtained at a distillation temperature of 100 ℃. Graphic abstract