温度对亚硝化及氧化亚氮释放的影响  

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

作　　者：郭宁[1] 张建[1] 孔强[1] 苗明升[2] 田琳[2] 

机构地区：[1]山东大学环境科学与工程学院,济南250100 [2]山东师范大学生命科学学院,济南250014

出　　处：《环境工程学报》2013年第4期1308-1312,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金面上项目(21177075);教育部新世纪优秀人才支持计划项目(NCET-10-0554)

摘　　要：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%,NO2--N与NH4+-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1.494μg/g MLSS。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.

关 键 词：温度 亚硝化 生物脱氮工艺 氧化亚氮 

分 类 号：X703.1[环境科学与工程—环境工程]