曝气量对CAST工艺脱氮性能的影响  

Effect of Aeration Rates on Nitrogen Removal Performance of Cyclic Activated Sludge Technology (CAST) Process

作　　者：徐凤[1] 李佩武[1] 刘艳辉[2,3] 

机构地区：[1]天津师范大学城市与环境科学学院,天津300387 [2]天津城市建设学院环境与市政工程系,天津300384 [3]天津城市建设学院天津市水质科学与技术重点实验室,天津300384

出　　处：《天津城市建设学院学报》2010年第4期281-284,共4页Journal of Tianjin Institute of Urban Construction

基　　金：国家自然科学基金(50808128);国家水体污染控制与治理科技重大专项(2008ZX07314);天津市自然科学基金(10JCYBJC05300)

摘　　要：采用循环式活性污泥法(CAST)工艺处理生活污水,来研究曝气量对系统脱氮性能的影响.对不同曝气量(AR)下的系统氨氮和总氮去除效率进行了考察,并分析了不同曝气量下主反应区的溶解氧浓度变化.结果表明:三种曝气量(AR1=0.1,m3/h,AR2=0.2,m3/h,AR3=0.3,m3/h)条件下工艺氨氮去除效率为AR3>AR2>AR1,系统总氮去除效率则为AR2>AR1>AR3.0.2,m3/h的曝气量在主反应区形成的溶解氧浓度水平(0.0～2.0,mg/L)有利于工艺脱氮性能的提高.The effect of aeration rates on nitrogen removal performance was studied in a cyclic activated sludge technology（CAST） process,which was used here for domestic wastewater treatment.In this research,the ammonium nitrogen removal efficiencies and total nitrogen removal efficiencies were examined and the dissolved oxygen concentration profile under different aeration rates was analyzed.Results showed that under the three aeration rates（AR1=0.1 m3/h,AR2=0.2 m3/h,AR3=0.3 m3/h）,the ammonium nitrogen removal efficiency is in a hierarchy of AR3,AR2,and AR1,and the total nitrogen removal efficiency is in a hierarchy of AR2AR1AR3.The dissolved oxygen scope（0.0-2.0mg/L） under 0.2 m3/h in the main reaction zone was in favor of the improvement of nitrogen removal performance in CAST system.

关 键 词：循环式活性污泥法 同步硝化反硝化 曝气量 脱氮性能 

分 类 号：X703[环境科学与工程—环境工程]