Landfill leachate treatment by batch supercritical water oxidation
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Militar Nueva Granada
2017
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| _version_ | 1876445463298703360 |
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| author | Victor Fernando Marulanda Cardona |
| author_facet | Victor Fernando Marulanda Cardona |
| contents | Landfill leachate treatment by batch supercritical water oxidation Victor Fernando Marulanda Cardona Paola Andrea Marulanda Buitrago Didier Haid Alvarado Acosta Ingeniería SCWO SCWO TOC destruction TOC destruction Landfill leachate Landfill 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. 2017 artículo científico 0124-8170 https://www.redalyc.org/articulo.oa?id=91150559003 https://www.redalyc.org/journal/911/91150559003/ https://www.redalyc.org/journal/911/91150559003/html/ https://www.redalyc.org/journal/911/91150559003/91150559003.epub https://www.redalyc.org/journal/911/91150559003/movil http://dx.doi.org/10.18359/rcin.2305 en http://www.redalyc.org/revista.oa?id=911 Ciencia e Ingeniería Neogranadina application/pdf Universidad Militar Nueva Granada Ciencia e Ingeniería Neogranadina (Colombia) Num.2 Vol.27 |
| format | Artículo científico |
| id | redalyc_91150559003 |
| institution | Redalyc |
| language | en |
| publishDate | 2017 |
| publisher | Universidad Militar Nueva Granada |
| spellingShingle | Landfill leachate treatment by batch supercritical water oxidation Victor Fernando Marulanda Cardona Ingeniería SCWO SCWO TOC destruction TOC destruction Landfill leachate Landfill leachate treatment by batch supercritical water oxidation Victor Fernando Marulanda Cardona Paola Andrea Marulanda Buitrago Didier Haid Alvarado Acosta Ingeniería SCWO SCWO TOC destruction TOC destruction Landfill leachate Landfill 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. 2017 artículo científico 0124-8170 https://www.redalyc.org/articulo.oa?id=91150559003 https://www.redalyc.org/journal/911/91150559003/ https://www.redalyc.org/journal/911/91150559003/html/ https://www.redalyc.org/journal/911/91150559003/91150559003.epub https://www.redalyc.org/journal/911/91150559003/movil http://dx.doi.org/10.18359/rcin.2305 en http://www.redalyc.org/revista.oa?id=911 Ciencia e Ingeniería Neogranadina application/pdf Universidad Militar Nueva Granada Ciencia e Ingeniería Neogranadina (Colombia) Num.2 Vol.27 |
| title | Landfill leachate treatment by batch supercritical water oxidation |
| topic | Ingeniería SCWO SCWO TOC destruction TOC destruction Landfill leachate |
| url | https://www.redalyc.org/articulo.oa?id=91150559003 https://www.redalyc.org/journal/911/91150559003/ https://www.redalyc.org/journal/911/91150559003/html/ https://www.redalyc.org/journal/911/91150559003/91150559003.epub https://www.redalyc.org/journal/911/91150559003/movil http://dx.doi.org/10.18359/rcin.2305 |