溶解氧对NBIAS系统生物除磷脱氮的影响  

Effect of DO on Nitrogen and Phosphorus Removal in the NBIAS

作　　者：吉方英[1] 罗固源[1] 

机构地区：[1]重庆建筑大学城市建设学院,400045

出　　处：《重庆建筑大学学报》1999年第6期49-52,共4页Journal of Chongqing Jianzhu University

摘　　要：通过溶解氧对一池无回流间歇曝气系统( NBIAS) 对除磷脱氮效果的影响的研究表明:在NBIAS 系统运行过程中DO 和NOt- N浓度的周期性变化使系统呈现明显的厌氧—好氧—缺氧交替变化过程;DO愈大,硝化反应速度愈快,NOt- N浓度愈高,即能有效抑制在缺氧过程中的磷的释放, 保证出水水质; 当SRT在18～22 天的情况下,DO= 3 mg/l时,NBIAS处理城市污水出水TP< 1 mg/l,TP去除率> 80% 。The effect of dissolved oxygen(DO) on nitrogen and phosphorus removal in the NBIAS was studied in this article. The results show that the periodic variation of concentration of DO and Not-N in NBIAS leads to that the system was in alternate change of anaerobic, aerobic and anoxic process. The higher the concentration of DO, the larger the velocity of nitrification process, the higher the concentration Not-N and this can control release of phosphorus in the anoxic process. Under the operation condition of SRT=18-22d and DO=3mg/l, there will be the effluent TP≤1mg/l and the removal rate of TP>80%.

关 键 词：除磷脱氮 生物处理 溶解氧 间歇曝气 废水处理 

分 类 号：X703[环境科学与工程—环境工程]