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
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
Denitrification of high nitrate concentration wastewater using alternative carbon sources
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 173, Issues 1–3, 15 January 2010, Pages 682-688
نویسندگان
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