The olive pomace oil extraction industry generates large amounts of wastewater characterized by dark color, high suspended solid content, high turbidity, acidic pH, low biodegradability, high organic matter content, and phenolic compounds. Conventional treatments usually do not have a positive effect on pollutant removal, necessitating the use of different treatment techniques. In this sense, this work used Fenton's Advanced Oxidation Process as a means of treating these effluents, which is capable of removing mainly the organic load (90%) and phenolic compounds (>99%).