The objective of this study was to evaluate the physicochemical treatment of wool washing effluents from a textile industry in the city of Arequipa in order to comply with the Maximum Admissible Values (VMA), using 40% ferric trichloride as coagulant and 0,1% MT-FLOC 4299 polymer flocculant. The effluent was physically and chemically characterized at the beginning and at the end of the treatment, measuring pH, temperature, Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), total suspended solids (TSS), oils and fats, sulfates, ilosulphides, ammoniacal nitrogen, total cyanide, hexavalent chromium and turbidity. To determine the optimal doses of coagulant and flocculent, three treatments were done using a jug set at 50, 200 and 40 rpm. The sedimentation time of the floc was 10 minutes. The initial turbidity ranges oscillated between 200 and 800 NTU, obtaining a removal of 89 % ...