Evaluación de la reacción de Fenton sobre su efectividad en la remoción de materia orgánica de los efluentes de la planta de tratamiento de la curtiduría Tungurahua

Abstract

Tannery wastewater is a problem due to its high pollutant load, negatively affecting water quality. Its proper treatment is essential to preserve the environment. Therefore, the objective of this project is to evaluate the Fenton reaction in the removal of organic matter from the effluents of the Tungurahua tannery treatment plant, where the physicochemical properties of the residual water were characterized, followed by the identification of the optimal parameters for the Fenton process, the treatment of produced sludge and the evaluation of the biodegradability of the effluents by analyzing the ratio of BOD to COD. With which, through the Fenton reaction, a 45.3 percent COD removal was achieved, under a molar ratio of one to ten between iron and hydrogen peroxide, pH of 2.5 and a reaction time of 120 minutes, highlighting the effectiveness of the process in reducing organic matter present in the effluent, finding a ratio of 0.80 between milligrams of hydrogen peroxide and milligrams of COD. Furthermore, treatment 4 of the Fenton sludge treated with lime and cement turned out to be the most effective, complying with the established physicochemical parameters. Likewise, a favorable rate of 57.4 percent of biodegradability was found, which indicates that a significant part of the organic compounds can be decomposed by microorganisms, contributing to the improvement of environmental quality.