Tratamiento por oxidación química FENTON de las aguas residuales de una imprenta

Abstract

The investigation was carried out in an industry dedicated to printing labels of all kinds, located in the province of Pichincha. The company carries out a flocculation and coagulation treatment of its wastewater without reaching the COD value established in AM 097 A, Annex 1, Table 8. Sewerage. Currently, the company does not discharge the treated effluent but rather recirculates it within the plant, forming a closed circuit. With the desire to discharge the effluent at some point, the printing company requested to determine a complementary treatment. A first characterization was made, finding that the treatment must be purely chemical. The FENTON treatment was chosen for its application in the wastewater at the outlet of the Treatment Plant. Sampling was carried out for four months, and the sample was treated with different doses of the hydrogen peroxide mixture Ferrous sulfate heptahydrate. Initial characterizations of the sample were carried out at each sampling stage, and then COD was measured in the waters treated with FENTON. The highest removal found was 70% of COD, which was insufficient to comply with current environmental regulations. It is recommended that the company continue with recirculation or treat the effluent as hazardous waste and send it to an environment authorized manager.