ResumenSe aplicaron tecnologías avanzadas de oxidación no fotoquímicas, ozonización y oxidación electroquímica, como posibles alternativas para tratar las aguas de lavado de biodiesel. La caracterización fisicoquímica de las aguas mostró altos niveles en demanda química y bioquímica de oxígeno, carbono orgánico total y metanol. Ambas tecnologías aumentaron levemente la biodegradabilidad del agua y mostraron valores de remoción similares, con remociones de demanda química de oxígeno entre 5 y 9 % y de carbono orgánico total entre 9 y 11%. Sin embargo la ozonización presenta características que la hacen más versátil para ser implementada a mayor escala como un sistema de tratamiento solo o acoplado a procesos biológicos, comúnmente usados para el tratamiento de aguas con alta carga orgánica. Palabras clave: ozonización, oxidación electroquímica, biodiesel, aguas residuales, descontaminaciónAbstract Non-photochemical advanced oxidation technologies, ozonation and electrochemical oxidation, as alternative technologies to treat wastewaters from biodiesel production were applied. The physicochemical characterization of the wastewaters showed high levels in biochemical and chemical oxygen demand, total organic carbon and residual methanol. Both technologies increased the wastewater biodegradability and showed similar efficiencies in the reduction of the organic loads, with chemical oxygen demand removal between 5 and 9 % and total organic carbon removal between 9 and 11 %. However the ozonation showed to be a more versatile technology to be implemented on a larger scale as a system for treatment alone or coupled to biological processes that are typically used in treating waters with high organic load.
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