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Landfill leachate treatment by batch supercritical water oxidation

dc.contributor.authorMarulanda Cardona, Victor Fernando
dc.contributor.authorMarulanda Buitrago, Paola Andrea
dc.contributor.authorAlvarado Acosta, Didier Haid
dc.date.accessioned2020-01-08T19:11:30Z
dc.date.available2020-01-08T19:11:30Z
dc.date.issued2017-08-01
dc.identifierhttp://revistas.unimilitar.edu.co/index.php/rcin/article/view/2305
dc.identifier10.18359/rcin.2305
dc.identifier.urihttp://hdl.handle.net/10654/33423
dc.descriptionLandfill leachate treatment has been the focus of a great deal of research through different physicochemical and biological methods. However, no single method successfully addresses the required destruction efficiencies regarding organic matter and nitrogen, which is why the treatment is done employing combined technologies. Supercritical water oxidation (SCWO), a process that takes place at temperatures and pressures above the critical point of water and in the presence of a source of oxygen, has been successfully applied to the treatment of different types of wastewaters in an efficient way. Therefore, this paper presents an experimental study of the supercritical water oxidation of landfill leachate in a batch reactor in the temperature range 400-500°C, reaction times from 15 to 30 minutes and oxygen excess (OE) from 100% to 300 %. Total organic carbon (TOC) and Total nitrogen (TN) destruction efficiencies were measured in the reactor effluent samples and the combined effect of the studied factors was analyzed by means of the Analysis of Variance (ANOVA). Optimal operation conditions for TOC destruction were 400°C, 30 min and 100 % OE, being 500°C, 30 min and 100 % OE for TN destruction. Contrary to what has been reported in similar studies, the results suggest that it is possible to accomplish the simultaneous TOC and TN destruction in leachate wastewater by SCWO treatment at 400°C, 100 % OE and residence times longer than 30 min and without using a catalyst, either in batch or in a continuous process, as long as both the oxidant and the wastewater are mixed and heated together at the reaction temperature.eng
dc.descriptionEl tratamiento de lixiviados por medio de diferentes procesos fisicoquímicos y biológicos ha sido ampliamente estudiado. Sin embargo, ningún proceso logra las eficiencias de destrucción requeridas en cuanto a materia orgánica y nitrógeno, razón por la cual el tratamiento se realiza por medio de tecnologías combinadas. La oxidación en agua supercrítica o SCWO, proceso que se lleva a cabo a temperaturas y presiones superiores a las del punto crítico del agua en presencia de una fuente de oxígeno, se ha aplicado exitosamente al tratamiento de distintos tipos de aguas residuales de forma eficiente. Por lo tanto, este trabajo presenta un estudio experimental de la oxidación en agua supercrítica de lixiviados de relleno sanitario en un reactor batch, en el rango de temperatura de 400-500°C, tiempos de reacción de 15 a 30 minutos y excesos de oxígeno (OE) de 100 % a 300 %. Se midieron las eficiencias de destrucción de carbono orgánico total (COT) y nitrógeno total (NT), y se determinó el efecto combinado de los factores estudiados por medio del Análisis de Varianza (ANOVA). Las condiciones de operación óptimas para la destrucción de COT fueron 400°C, 30 min y 100 % OE, y 500°C, 30 min y 100 % OE para el NT. A diferencia de lo reportado en estudios similares, los resultados sugieren que es posible llevar a cabo la destrucción simultánea del COT y el NT en los lixiviados por medio de SCWO a 400°C, 100 % OE y tiempos de residencia de más de 30 min sin usar un catalizador, ya sea en un proceso batch o continuo, siempre y cuando tanto el oxidante como el agua residual se mezclen y se calienten juntos a la temperatura de reacción.spa
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dc.language.isoeng
dc.publisherUniversidad Militar Nueva Granadaspa
dc.rightsDerechos de autor 2016 Ciencia e Ingeniería Neogranadinaspa
dc.rightshttps://creativecommons.org/licenses/by-nc-nd/4.0spa
dc.sourceCiencia e Ingenieria Neogranadina; Vol 27 No 2 (2017); 5-26eng
dc.sourceCiencia e Ingeniería Neogranadina; Vol. 27 Núm. 2 (2017); 5-26spa
dc.sourceCiencia e Ingeniería Neogranadina; v. 27 n. 2 (2017); 5-26por
dc.source1909-7735
dc.source0124-8170
dc.titleLandfill leachate treatment by batch supercritical water oxidationeng
dc.titleTratamiento de lixiviados de relleno sanitario por medio de oxidación en agua supercríticaspa
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
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dc.subject.proposallandfill leachateeng
dc.subject.proposalSCWOeng
dc.subject.proposalTOC destructioneng
dc.subject.proposaltotal nitrogen destructioneng
dc.subject.proposallixiviadosspa
dc.subject.proposalSCWOspa
dc.subject.proposaldestrucción de COTspa
dc.subject.proposaldestrucción de nitrógeno totalspa


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