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Please use this identifier to cite or link to this item: http://hdl.handle.net/10651/32529

Title: Denitrification of high nitrate concentration wastewater using alternative carbon sources
Author(s): Fernández Nava, Yolanda
Marañón Maison, María Elena
Soons, Jan
Castrillón Peláez, Leonor
Keywords: Activated sludge
Alternative carbon sources
Stainless steel rinse wastewater
Issue date: 2010
Publisher: Elsevier
Publisher version: http://dx.doi.org/10.1016/j.jhazmat.2009.08.140
Citation: Journal of Hazardous Materials, 173(1-3), p. 682-688 (2010); doi:10.1016/j.jhazmat.2009.08.140
Format extent: p. 682-688
Abstract: The use of different organic carbon sources in the denitrification of wastewater containing 2500 mg nitrates/L in a SBR was studied. Three alternative sources of carbon were tested: wastewater from a sweet factory, a residue from a soft drinks factory and a residue from a dairy plant. The first two are sugar-rich, whereas the third presents a high content in lactic acid. Maximum specific denitrification rates of between 42 and 48 mg NO3-N/g VSS h were obtained. The effluents were nitrate-free and very low COD concentrations were obtained in 4–6 h reaction time, especially with the sugar-rich carbon sources. The values of the denitrifier net yield coefficient were higher than when using methanol (0.93–1.75 g VSSformed/g NOx-Nreduced). The lowest value was obtained using the lactic acid-rich residue. The optimum COD/N ratios varied between 4.6 for the lactic acid-rich carbon source and 5.5–6.5 for the sugar-rich carbon sources
URI: http://hdl.handle.net/10651/32529
ISSN: 0304-3894
Sponsored: European Union via Contract ECSC-7210-PR-358, Membrane-bioreactor system for treatment of nitrates in pickling process waste water
Project id.: ECSC-7210-PR-358
Appears in Collections:Artículos
Ingeniería Química y Tecnología del Medio Ambiente

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