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Evaluation of aerated lagoon modified with spongy support medium treating Kraft pulp mill effluent/Evaluacion de la laguna aireada modificada con medio de soporte que trata el efluente Kraft

Revista Facultad de Ingeniería, 2019-07 (92), p.70 [Peer Reviewed Journal]

COPYRIGHT 2019 Universidad de Antioquia, Facultad de Ingenieria ;ISSN: 0120-6230 ;EISSN: 2422-2844 ;DOI: 10.17533/udea.redin.20190725

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  • Title:
    Evaluation of aerated lagoon modified with spongy support medium treating Kraft pulp mill effluent/Evaluacion de la laguna aireada modificada con medio de soporte que trata el efluente Kraft
  • Author: Peitz, Camila ; Xavier, Claudia Regina
  • Subjects: Analysis ; Biochemical oxygen demand ; Biochemistry ; Biodegradation ; Lignin ; Sewage treatment ; Toxicity ; Wood pulp industry
  • Is Part Of: Revista Facultad de Ingeniería, 2019-07 (92), p.70
  • Description: The pulp industry generates high effluent flows, which contain high chemical oxygen demand (COD), biochemical oxygen demand ([BOD.sub.5]), colour and ecotoxicity. This study aimed to evaluate the treatment of Kraft pulp effluent by aerated lagoon modified with sponge support media (APG). It was assessed the arrangement of the support media in the aerated lagoons in the organic load rate (OLR) of 0.2 [kg.sub.COD] [m.sup.-3] [d.sup.-1], and after that, with OLR variation from 0.2 to 1.2 [kg.sub.COD] [m.sup.-3] [d.sup.-1]. The parameters evaluated were [BOD.sub.5], COD, colour, lignin derivatives, total phenolic compounds and acute ecotoxicity in D. magna. COD and [BOD.sub.5] removals were 32% and 88%, respectively, for free and confined support media in 0.2 [kg.sub.COD] [m.sup.-3] [d.sup.-1]. There was no colour or total phenolic compounds removal under these conditions. Considering the treatment in which there was a variation of the organic load rate, 1.2 [kg.sub.COD] [m.sup.-3] [d.sup.-1] had the best performance. In this case, 50% and 75% of COD and [BOD.sub.5] were removed, respectively. Removal of colour, total phenolic compounds and lignin derivatives were around 20%, 18% and 10%, respectively. The acute ecotoxicity was reduced to toxicity factor equal to 1 in all treatments. Comparing the aerated lagoon modified systems with those without the APG, it was suggested to apply spongy support in higher organic load rate than these typically used in aerated lagoons. KEYWORDS: Biological treatment, biodegradation, specific compounds La industria de celulosa genera grandes flujos de efluentes que contienen una alta demanda quimica de oxigeno (DQO), demanda bioquimica de oxigeno ([DBO.sub.5]), 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 organica volumetrica de 0,2 [kg.sub.DQO] [m.sup.-3] [d.sup.-1], despues de esto se estudio una variacion de carga de 0,2 a 1,2 [kg.sub.DQO] [m.sup.-3] [d.sup.-1]. Se evaluaron los parametros [DBO.sub.5], DQO, color, derivados de lignina, compuestos fenolicos totales y ecotoxicidad en D. magna. Las remociones de DQO y [DBO.sub.5] fueron de 32% y 88%, respectivamente, para los medios de soporte libres y confinados en 0,2 [kg.sub.DQO] [m.sup.-3] [d.sup.-1]. No hubo remocion del color o compuestos fenolicos totales en estas condiciones. Considerando la variacion de la carga organica volumetrica, el mejor desempeno fue para 1,2 [kg.sub.DQO] [m.sup.-3] [d.sup.-1], donde fueron eliminados 50% y 75% de la DQO y [DBO.sub.5], respectivamente. La remocion del color, compuestos fenolicos 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 organica mas alta que aquellas tipicas de lagunas aireadas. Tratamiento biologico, biodegradacion, compuestos especificos
  • Publisher: Universidad de Antioquia, Facultad de Ingenieria
  • Language: Spanish
  • Identifier: ISSN: 0120-6230
    EISSN: 2422-2844
    DOI: 10.17533/udea.redin.20190725
  • Source: ProQuest Central
    DOAJ Directory of Open Access Journals
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