作　　者： ; ; ; ; (蔚凡）;

机构地区： 西安建筑科技大学环境与市政工程学院

出　　处： 《江苏大学学报（自然科学版）》 2012年第5期586-590,共5页

摘　　要： 利用NH4+,NO2-,NO3-和pH等4种离子选择性微电极,研究了不同基质浓度条件下厌氧氨氧化系统中颗粒污泥内部氮素迁移转化的空间分布特征.结果表明:当基质浓度充足时,从颗粒污泥表面到内部的氨氮和亚硝酸盐氮浓度以一定比例同时降低,发生了以厌氧氨氧化反应为主的特征反应;当氨氮浓度受限时,污泥颗粒外层区域(0～1 200μm)发生厌氧氨氧化脱氮途径,内层区域(1 200～2 500μm)发生以亚硝酸盐氮降低为特征的反硝化途径;当只存在NOx-时,颗粒污泥内部发生反硝化的特征反应.因此,厌氧生物转盘氨氧化系统中至少存在厌氧氨氧化和自养反硝化两种生物脱氮途径. To investigate the mechanism and pathways of nitrogen removal, four microelectrodes of NH4^＋ , NO2^- , NO3^- and pH were used to explore the translorm of nitrogen compounds inside the gra-nules obtained from the anaerobic rotating biological contactor （AnRBC） under different operating condi-tions. The results show that when the substrate concentration is sufficient, the concentration of ammonia and nitrite are decreased simultaneously from the granular surface with characteristic reaetion of Anam-mox. When the ammonia concentration is limited in the system, ammonia is consumed by Anainmox in the outer layer（0 - 1 200 μm） , while in the inner layer（ 1 200-2 500 μm） , nitrogen removal is by denitrifieation of nitrite. When there is only NOx^- in granules, the pathway of nitrogen removed shows characteristic of denitrifieation. There are at least two nitrogen removal pathway of Anammox and auto-trophie denitrifieation in the AnRBC system.

关 键 词： 厌氧生物转盘 厌氧氨氧化 反硝化 微电极 脱氮途径

领　　域： [环境科学与工程]