Persulfate Process Activated by Homogeneous and Heterogeneous Catalysts for Synthetic Olive Mill Wastewater Treatment

Wastewaters from the olive oil industry are a regional environmental problem. Their phenolic content provides inherent toxicity, which reduces treatment potential of conventional biological systems. In this study, Sulfate Radical based Advanced Oxidation Processes (SRbAOPs) compared with advanced oxidation processes (namely Fenton’s peroxidation) as depuration alternative. Synthetic mill wastewaters were submitted to homogeneous and heterogeneous SRbAOPs using iron sulfate solid catalysts (red mud Fe-Ce-O) source (II). The homogenous process was optimized by testing different pH values, well persulfate loads. At best conditions (pH 5, 300 mg/L 600 persulfate), it possible achieve 39%, 63% 37% COD, compounds TOC removal, respectively. catalytic waste mud) laboratory material (Fe-Ce-O) tested heterogenous SRbAOPs. performance achieved Fe-Ce-O, an optimal load 1600 mg/L. these conditions, 27%, 55% 5% removal obtained, Toxicity tests on A. fischeri L. sativum showed no improvements in toxicity treated solutions when original one. Thus, use suitable technology for synthetic OMW.