不同氨氮浓度对部分亚硝化过程中N_2O释放的影响  

Effects of Different Concentrations of Ammonia Nitrogen on N_2O Emission in the Process of Partial Nitrification

作　　者：田琳[1] 孔强[1,2] 张建[2] 苗明升[1] 

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

出　　处：《安徽农业科学》2012年第33期16325-16327,共3页Journal of Anhui Agricultural Sciences

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07209-006;2009ZX07210-009)

摘　　要：[目的]研究氨氮浓度对部分亚硝化过程中温室气体N2O释放的影响。[方法]利用序批式生物膜反应器(SBBR),采用间歇曝气的方式,分析进水不同氨氮浓度对部分亚硝化过程中N2O产生的影响。[结果]当进水氨氮浓度不同时,部分亚硝化过程中DO、ORP变化趋势大体一致,出水中亚硝氮与氨氮的浓度比都能达到1∶1,而且硝氮始终都维持在较低水平。进水氨氮浓度对部分亚硝化过程中N2O的释放有显著影响,氨氮浓度越高,N2O的释放量越大。其中,当氨氮浓度为400 mg/L时,N2O的释放量高达37 mg左右。[结论]部分亚硝化过程中N2O的释放可能与NH4+、NO2-的浓度有关。[Objective] The study aimed to discuss the effects of different concentrations of ammonia nitrogen on N2O emission in the process of partial nitrification.[Method] By using a sequencing batch biofilm reactor（SBBR） under intermittent aeration,the influences of various concentrations of influent ammonia nitrogen on nitrous oxide（N2O） emission from partial nitrification were analyzed.[Result] When the concentration of influent ammonia nitrogen varied from 200 to 400 mg/L,the changing trends of DO and ORP value were consistent during the process of partial nitrification,and the concentration ratio of NO-2-N to NH＋4-N in the effluent reached 1∶1,with lower NO-3-N level.In addition,ammonia nitrogen concentration in the influent had a significant effect on N2O emission in the process of partial nitrification,that is,the higher the ammonia nitrogen concentration,the more the N2O emission.When ammonia nitrogen concentration was 400 mg/L,N2O emission was up to about 37 mg.[Conclusion] N2O emission in the process of partial nitrification might be related to the concentration of NH＋4 and NO-2.

关 键 词：氨氮 部分亚硝化 SBBR N2O 

分 类 号：S181.3[农业科学—农业基础科学] O629.9[理学—有机化学]