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Tratamiento de lixiviados de relleno sanitario local utilizando tecnología similar a Fenton

Authors: Maragaño Mujica, Julián; Delletesse, Maximiliano Iván; Vitale, Paula;

Tratamiento de lixiviados de relleno sanitario local utilizando tecnología similar a Fenton

Abstract

El relleno sanitario es la tecnología más utilizada y ampliamente difundida para la disposición final de residuos sólidos urbanos. Sin embargo, los lixiviados generados requieren de un tratamiento efectivo previo a su vertido (contenido de metales y alta carga orgánica). El proceso Fenton es actualmente una de las tecnologías avanzadas de oxidación más utilizadas para el tratamiento de efluentes no biodegradables debido a su eficacia y economía. En este trabajo se estudió la aplicación de tecnología similar a Fenton, con pH cercano a la neutralidad, como tratamiento para los lixiviados del relleno sanitario municipal de Olavarría (carga orgánica inicial Ca. 5400 mgO2 /L). Los parámetros óptimos del proceso se determinaron mediante metodología de superficie de respuesta (Statgraphics Centurion XVI). En ensayo típico, a 200 mL de lixiviado, con pH previamente ajustado (5 a 8,5), se aplicaron dosis de H2O2 (600 a 1800 ppm) y Sulfato Ferroso (1000 a 3000 ppm) en pulsos de volúmenes fijos por hora (4 totales). Los parámetros de respuesta (demanda química de oxígeno, conductividad y pH final) fueron medidos inicialmente y transcurridas 48 horas del comienzo del experimento. En los resultados obtenidos, se observó que los parámetros de mayor relevancia en el tratamiento fueron la concentración agregada de Sulfato Ferroso y la interacción del mismo con el pH inicial de la muestra. Las condiciones óptimas permitieron alcanzar reducciones de carga orgánica mayores a 90% para un pH inicial de 7,92, una dosis de H2O2 de 1390 ppm y Sulfato Ferroso de 3000 ppm.

The landfill is the most widely used and widespread technology for the final disposal of urban solid waste. However, the generated leachate requires effective treatment before discharge (metal content and high organic load). The Fenton process is currently one of the most widely used advanced oxidation technologies for treating non-biodegradable effluents due to its efficiency and economy. In this work, the application of technology similar to Fenton, with a pH close to neutrality, was studied as a treatment for leachate from the Olavarría local landfill (initial organic load Ca. 5400 mgO2 /L). Optimal process parameters were determined using response surface methodology (Statgraphics Centurion XVI). In a typical test, to 200 mL of leachate, with previously adjusted pH (5 to 8.5), doses of H2O2 (600 to 1800 ppm) and Ferrous Sulfate (1000 to 3000 ppm) were applied in pulses of fixed volumes per hour (4 total). The response parameters (chemical oxygen demand, conductivity, and final pH) were measured initially and 48 hours after the beginning of the experiment. In the results, the most relevant parameters in the treatment were the added concentration of Ferrous Sulfate and its interaction with the initial pH of the sample. Optimum conditions allowed reaching organic load reductions more significant than 90% for an initial pH of 7.92, a dose of H2O2 of 1390 ppm, and Ferrous Sulfate of 3000 ppm.

Fil: Delletesse, Maximiliano Iván. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina

Fil: Vitale, Paula. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina

Fil: Maragaño Mujica, Julián. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ingeniería Olavarría; Argentina

Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura

6° Congreso Argentino de Ingeniería; 12° Congreso Argentino de Enseñanza de Ingeniería

Universidad de la Cuenca del Plata. Facultad de Ingeniería y Tecnología

Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias

Universidad Tecnológica Nacional. Facultad Regional Resistencia

Country
Argentina
Keywords

Fenton, Relleno sanitario, Demanda química de oxígeno, https://purl.org/becyt/ford/2.4, Lixiviado, https://purl.org/becyt/ford/2

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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