溶解氧浓度对好氧阶段生物脱氮途径的影响  

Effect of aeration rate on biological nitrogen removal methods

作　　者：高兰[1] 章北平[1] 郑源贾[1] 冯立文[1] 

机构地区：[1]华中科技大学环境科学与工程学院,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2013年第2期114-119,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家科技支撑计划资助项目(2012BAC05B02)

摘　　要：采用连续流一体化生物反应器(CIBR)系统,研究了4种曝气量(0.3,0.6,0.9和1.2m3/h)对好氧阶段生物脱氮途径的影响.实验结果表明:当曝气量为0.3m3/h时硝化反应未能顺利进行,其余3种曝气量下均顺利完成硝化反应,曝气量越大,硝化速率越大;总氮(TN)损失量分析表明低曝气量有利于同步硝化反硝化(SND)的发生,当曝气量为0.3m3/h时TN损失量高达9.76mg.L-1,当曝气量高于0.3m3/h时以传统硝化作用为主.研究表明溶解氧(DO)质量浓度影响生物脱氮途径的根本原因是DO影响了氨氧化菌(AOB)、亚硝酸盐氧化菌(NOB)和反硝化菌(DB)的活性,可通过在线控制方式实现各种脱氮途径.The effect of different aeration rates （0.3, 0.6, 0.9 and 1.2 m^3/h） on biological nitrogen removal methods was investigated by a bench-scale continuous-flow integrated biological reactor （CIBR）. The results show that nitrification is finished at different aeration rates except for 0.3 m^3/h, and the nitrification rate increases with the aeration rate. A better efficiency of simultaneous nitrification and denitrification （SND） can be obtained in lower aeration rate, and the total nitrogen （TN） loss is up to 9.76 mg/L at the aeration rate of 0.3 m^3/h, while the traditional nitrification method assumes a dominant position in higher aeration rate. The basic reason of these results is that the DO concentration effects the activities of ammonia oxidizing bacteria （AOB）, nitrite-oxidizing bacteria （NOB） and denitrifying bacteria （DB）. Meanwhile, the idea of realizing various nitrogen removal methods by using online control strategy was put forward.

关 键 词：污水处理 连续流一体化生物反应器(CIBR) 曝气量 脱氮途径 DO临界浓度 

分 类 号：X703.1[环境科学与工程—环境工程]