温度对哑硝化及氧化哑氮释放的影响

采用批次实验的方法探讨了3种不同温度（15℃，25℃，35℃）对亚硝化及其过程中温室气体氧化亚氮释放情况。结果表明，温度对亚硝化过程及氧化亚氮的释放有显著影响。在15～35℃范围内，随着温度的升高，氨氧化率和亚硝化积累率逐渐升高，N2O释放量也逐渐增大，35℃可以作为适宜的亚硝化温度，平均氨氧化率为50．9％，亚硝化积累率为55．6％，NO-2-N与Nrl4-N出水浓度比为1．1，氨氧化率，亚硝化积累率和出水中亚硝氮与氨氮浓度比较合适，从而可以为厌氧氨氧化工艺提供合适的进水，但在此温度下平均N2O释放量相对较高，为1．494la,g／gMLSS。

Effect of temperature on ammoxidation and nitrous oxide emission in partial nitrification

To investigate the effect of temperature on partial nitrification and nitrous oxide emission in the process, batch experiments at different temperatures（ 15℃ ,25℃ ,35℃ ） were conducted. The results indicated that temperature has important effect on partial nitrification and nitrous oxide emission in the process. In the range of 15 to 35℃ , ammoxidation percentage, nitrite accumulation rate and the emission of nitrous oxide rose with the temperature going up. 35~C is the appropriate temperature for partial nitrification, the reason is that the average ammoxidation percentage is 50.9% , the nitrite accumulation rate is 55.6% and the ratio of NO2--N to NI-I4 -N is 1.1 at this temperature. The ammoxidation percentage and the ratio of NO2- -N to NH4 -N at 35℃ were appropriate, so the partial nitrification can supply proper inflow to anaerobic ammonium oxidation. The average emission of N2O is higher which is 1. 494 μ/g MLSS.