This research consisted of the evaluation and characterization of wastewater generated during the leather soaking process, both in its conventional method and its enzymatic method. The experiments were conducted at an industrial scale at the Helianthus S.A.C. Company in Lima, using 20 cow hides. Likewise, a treatment process was evaluated for these effluents consisting of protein precipitation and was followed by coagulation. Finally, the dry sludge from each treatment method was evaluated separately for its potential use as fertilizer. The process for the chemical precipitation of proteins consisted of applying KOH until reaching pH values of 10, 11 and 12; while the coagulation process consisted of the application of doses of 600, 800 and 1000 mg/L of aluminum sulphate 17%. When using the conventional soaking process wastewater, the proposed treatment system achieved removal efficienci...