Study of Different Advanced Oxidation Processes for Wastewater Treatment from Petroleum Bitumen Production at Basic pH
2017-07-12T00:00:00Z (GMT) by
Effluents from production of petroleum bitumens were submitted to treatment by three different AOPs at basic pH (i.e., O<sub>3</sub>, H<sub>2</sub>O<sub>2</sub> and the combination of O<sub>3</sub> and H<sub>2</sub>O<sub>2</sub>, a so-called peroxone). The paper presents studies on the identification and monitoring of the volatile organic compounds (VOCs) degradation present in the effluents and formation of byproducts, COD, BOD<sub>5</sub>, sulfide ions, biotoxicity, and biodegradability changes during treatment. Peroxone at 25 °C with a ratio of oxidant in relation to the COD of the effluents (<i>r</i><sub>ox</sub>) of 0.49 achieved 43% and 34% of COD and BOD<sub>5</sub> reduction resulting in the most effective AOP studied. S<sup>2–</sup> ions were effectively oxidized in all technologies studied. Ozonation at 25 °C and with a <i>r</i><sub>ox</sub> of 0.34 was the most effective process to degrade VOCs. Decrease in the biotoxicity was reported in O<sub>3</sub> and peroxone processes. Byproduct formation in different AOPs was reported. These reductions revealed that these technologies are effective if used as pretreatment methods.