Evaluation of aerated lagoon modified with spongy support medium treating Kraft pulp mill effluent

Camila Peitz; Claudia Regina Xavier

doi:10.17533/udea.redin.20190725

Autores/as

Camila Peitz Universidad Tecnológica Federal de Paraná
Claudia Regina Xavier Universidad Tecnológica Federal de Paraná

DOI:

https://doi.org/10.17533/udea.redin.20190725

Palabras clave:

tratamiento biológico, biodegradación, compuestos específicos

Resumen

La industria de celulosa genera grandes flujos de efluentes que contienen una alta demanda química de oxígeno (DQO), demanda bioquímica de oxígeno (DBO5), color y ecotoxicidad. Este estudio tuvo como objetivo evaluar el tratamiento del efluente de celulosa Kraft en lagunas aireadas con medios de soporte de esponja (APG). Fue evaluado el arreglo de los medios de soporte en carga orgánica volumétrica de 0,2 kgDQO m-3 d -1, después de esto se estudió una variación de carga de 0,2 a 1,2 kgDQO m-3 d -1. Se evaluaron los parámetros DBO5, DQO, color, derivados de lignina, compuestos fenólicos totales y ecotoxicidad en D. magna. Las remociones de DQO y DBO5 fueron de 32% y 88%, respectivamente, para los medios de soporte libres y confinados en 0,2 kgDQO m-3 d -1. No hubo remoción del color o compuestos fenólicos totales en estas condiciones. Considerando la variación de la carga orgánica volumétrica, el mejor desempeño fue para 1,2 kgDQO m-3 d -1, donde fueron eliminados 50% y 75% de la DQO y DBO5, respectivamente. La remoción del color, compuestos fenólicos totales y derivados de lignina fueron de cerca de 20%, 18% y 10%, respectivamente. La ecotoxicidad aguda se redujo a factor de toxicidad de 1 en todos los tratamientos. Comparando los sistemas de laguna aireada sin la presencia del APG, se sugiere aplicar un soporte esponjoso en carga orgánica más alta que aquellas típicas de lagunas aireadas.

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Biografía del autor/a

Camila Peitz, Universidad Tecnológica Federal de Paraná

Grupo GTEF, Programa de Posgrado en Ciencia y Tecnología Ambientales, Departamento de Química y Biología DAQBi.

Claudia Regina Xavier, Universidad Tecnológica Federal de Paraná

Grupo GTEF, Programa de Posgrado en Ciencia y Tecnología Ambientales, Departamento de Química y Biología DAQBi.

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