Department of Chemical Engineering and Environmental Technology, University Institute of Industrial Technology of Asturias (IUTA), Higher Polytechnic School of Engineering, University of Oviedo, 33203 Gijón, Spain.
J Hazard Mater. 2010 Jan 15;173(1-3):682-8. doi: 10.1016/j.jhazmat.2009.08.140. Epub 2009 Sep 4.
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 NO(3)-N/g VSS h were obtained. The effluents were nitrate-free and very low COD concentrations were obtained in 4-6h 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 VSS(formed)/g NO(x)-N(reduced)). 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.
采用序批式反应器（SBR）研究了不同有机碳源在 2500mg/L 硝酸盐废水中的反硝化作用。试验了三种替代碳源：甜厂废水、软饮料厂残渣和奶制品厂残渣。前两种是富含糖的，而第三种则含有较高的乳酸。最大比反硝化速率在 42 到 48mgNO3--N/gVSSh 之间。出水硝酸盐为零，在 4-6h 反应时间内获得了非常低的 COD 浓度，尤其是使用富含糖的碳源时。反硝化菌净产率系数的值高于使用甲醇时（0.93-1.75gVSS（形成）/gNOx-N（还原））。使用富含乳酸的残渣时得到的数值最低。最佳 COD/N 比在富含乳酸的碳源为 4.6，而在富含糖的碳源为 5.5-6.5。
