The objective of this research was to "Apply Ozone Technology in the treatment of leachates to reduce total organic compounds in the solid urban waste landfill in Cajamarca". Applied research was carried out at an experimental level. The population was represented by the leachates coming from the urban landfill of Cajamarca. Among the most outstanding results, it was found that the topography of the terrain increases the possibility of runoff into the landfill, putting at risk the nearby water bodies, as well as the soil and the environment. The physicochemical and biological parameters exceed the maximum allowable limits. The ozone technique was applied using portable equipment and showed an improvement in the concentrations of organic parameters of between 32% and 5%, with the greatest reduction in COD (from 1,031.3 mg/l to 702.5 mg/l). In reference to the true color of the water, an improvement of 54% was achieved, evidenced by a more clarified water. Finally, the biological parameters represented by total coliforms achieved a significant reduction. Ozone treatment achieved the elimination of biological agents by reducing them to 99.9%.
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