高温下生物滴滤塔脱除烟气NO_x的研究  

STUDY OF BIOTRICKLING FILTER FOR NO_x REMOVAL UNDER THERMOPHILIC AND AEROBIC CONDITIONS

作　　者：梁炜[1] 黄少斌[2] 

机构地区：[1]北京师范大学珠海分校环境科学与工程系,广东珠海519000 [2]华南理工大学环境与能源学院,广州510006

出　　处：《环境工程》2016年第11期64-67,161,共5页Environmental Engineering

基　　金：国家自然科学基金(51378217;U1360101)

摘　　要：NOx是燃烧烟气中典型有害污染物之一。利用前期已筛选出的具有高温好氧反硝化能力的菌株Chelatococcus daeguensis TAD1作为菌源,建立高温生物滴滤系统,在模拟烟气NO入口浓度535.7 mg/m^3、氧气浓度8%的条件下,考察了温度、反应器空床停留时间(EBRT)、填料高度、循环液NO_3^--N浓度对NO去除效率的影响。研究结果表明:系统温度控制在20~50℃时,NO去除率均保持在80%以上;随着EBRT的增加,NO去除率也逐渐上升;生物滴滤塔内不同填料高度NO的去除率均保持较高水平;循环液中NO_3^-的反硝化作用抑制了NO的脱除。Nitrogen oxides（ NOx） are hazardous air pollutants. A thermophilic biotrickling lter system was established to inoculate a newly isolated strain of Chelatococcus daeguensis TAD1. We conducted experiments to evaluate the effect of temperature,EBRT,the concentration of NO_3^--N in trickling liquid,on NO removal rate. The bench-scale BTF was operated under 535. 7 mg/m^3 inlet NO and 8% of O_2. The results showed that： the BTF system was able to remove 80% of NO consistently when the temperature was at 20 ~ 50 ℃; NO removal efficiency increased with the EBRT increased. NO removal rate was maintained at high level on different height of this biotrickling filter; the removal of NO was inhibited by denitrification of nitrate in the trickling liquid.

关 键 词：高温 好氧反硝化 NO 

分 类 号：X773[环境科学与工程—环境工程]