稀土元素对生物塔烟气同时脱硫脱氮的强化作用  

Intensifying purification function of biofilm-packing tower by rare earth element on simultaneous removal of SO_2 and NO_x from flue gas

作　　者：魏中华[1] 孙珮石[1] 邹平[1] 毕晓伊[1] 姜阅[2] 任洪强[3] 王艳茹[3] 

机构地区：[1]云南大学工程技术研究院,昆明650091 [2]云南大学生命科学学院,昆明650091 [3]南京大学环境学院,南京210023

出　　处：《环境工程学报》2016年第4期1893-1899,共7页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51278447;51168046;51008264)

摘　　要：依据对9组持续20 d/组的正交实验（L_9（3^4））结果直观分析的极差值R变化情况考察,对稀土元素强化生物膜填料塔烟气同时脱硫脱氮性能（重点对脱氮性能）的作用进行了分析研究。分析及实验验证的结果表明,在启动阶段及实验的全过程中,添加稀土元素对生物塔烟气脱氮效率的影响均远大于同时添加的镁盐和碳源,而且其对脱氮菌生长的强化刺激作用存在于生物净化操作的全过程。According to investigations on the change in R value of range analysis during an orthogonal experiment,which was composed of nine groups（ L_9（ 3^4）） each lasting 20 days,a test study on intensifying the purification function of a biofilm-packing tower using a rare earth element,especially to promote the removal of NOx,was performed. A rare earth element,magnesium salt,and carbon source were used together as the chemical enhancer during orthogonal experiments to intensify the purification function of the biofilm-packing tower. The results of analysis and experiments indicated that the rare earth element had a greater influence than the magnesium salt and carbon source on the NOxpurification efficiency of the biofilm-packing tower,and it worked not only at the initial phase,but over the entire process as well. Furthermore,adding a rare earth element could improve the growth of denitrification bacteria over the entire process of biological removal of SO_2 and NOx.

关 键 词：稀土元素 强化作用 生物膜填料塔 烟气同时脱硫脱氮 

分 类 号：X701[环境科学与工程—环境工程]