کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
581023 | 1453155 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Denitrification of high nitrate concentration wastewater using alternative carbon sources
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
The use of different organic carbon sources in the denitrification of wastewater containing 2500Â 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 48Â mg NO3-N/g VSS h were obtained. The effluents were nitrate-free and very low COD concentrations were obtained in 4-6Â 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 173, Issues 1â3, 15 January 2010, Pages 682-688
Journal: Journal of Hazardous Materials - Volume 173, Issues 1â3, 15 January 2010, Pages 682-688
نویسندگان
Y. Fernández-Nava, E. Marañón, J. Soons, L. Castrillón,