IBB-Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Braga, Portugal.
Biodegradation. 2011 Jun;22(3):661-71. doi: 10.1007/s10532-010-9439-8. Epub 2010 Dec 12.
The denitrification performance of a lab-scale anoxic rotating biological contactor (RBC) using landfill leachate with high nitrate concentration was evaluated. Under a carbon to nitrogen ratio (C/N) of 2, the reactor achieved N-NO(3)(-) removal efficiencies above 95% for concentrations up to 100 mg N-NO(3)(-) l(-1). The highest observed denitrification rate was 55 mg N-NO(3)(-) l(-1) h(-1) (15 g N-NO(3)(-) m(-2) d(-1)) at a nitrate concentration of 560 mg N-NO(3)(-) l(-1). Although the reactor has revealed a very good performance in terms of denitrification, effluent chemical oxygen demand (COD) concentrations were still high for direct discharge. The results obtained in a subsequent experiment at constant nitrate concentration (220 mg N-NO(3)(-) l(-1)) and lower C/N ratios (1.2 and 1.5) evidenced that the organic matter present in the leachate was non-biodegradable. A phosphorus concentration of 10 mg P-PO(4)(3-) l(-1) promoted autotrophic denitrification, revealing the importance of phosphorus concentration on biological denitrification processes.
采用具有高硝酸盐浓度的垃圾渗滤液评估了实验室规模缺氧旋转生物接触器（RBC）的反硝化性能。在碳氮比（C/N）为 2 的条件下，该反应器在高达 100 mg N-NO3(-) l(-1)的浓度下实现了 N-NO3(-)去除效率超过 95%。在硝酸盐浓度为 560 mg N-NO3(-) l(-1)时，观察到的最高反硝化速率为 55 mg N-NO3(-) l(-1) h(-1)（15 g N-NO3(-) m(-2) d(-1)）。尽管该反应器在反硝化方面表现出非常好的性能，但出水化学需氧量（COD）浓度仍不适于直接排放。在随后的实验中，在恒定硝酸盐浓度（220 mg N-NO3(-) l(-1)）和较低 C/N 比（1.2 和 1.5）下获得的结果表明，渗滤液中存在的有机物是不可生物降解的。磷浓度为 10 mg P-PO4(3-) l(-1)促进了自养反硝化，揭示了磷浓度对生物反硝化过程的重要性。
