循环流化床厌氧氨氧化反应器脱氮性能研究  

Study on nitrogen removal properties of a high-rate hybrid anammox reactor

作　　者：高彦宁[1,2] 刘志军[1] 古川宪治[2] 

机构地区：[1]大连理工大学化工与环境生命学部,辽宁大连116023 [2]日本熊本大学工学部环境工学学科

出　　处：《现代化工》2011年第7期75-78,80,共5页Modern Chemical Industry

基　　金：国家自然科学基金资助项目(10972049)

摘　　要：对循环流化床上部附加无纺布作填料的固定床复合式厌氧氨氧化反应器的性能进行了研究,通过控制废水的循环量来调节反应器底部微生物颗粒的流化状态,并对反应器内对富集的厌氧氨氧化菌除氮性能进行了研究。结果表明,反应器稳定运行270 d,总氮去除率及亚硝氮去除率分别维持在80%及90%以上;最大氮负荷达到15.2 kg/m3.d-1,相应的最大氮去除速率达9.9 kg/m3.d-1。通过批实验,得到反应器稳定运行期厌氧氨氧化菌比活性为0.3 kg/k.gd-1。出水悬浮物(SS)浓度检测、微生物颗粒粒径分布测试、微生物颗粒的扫描电镜(SEM)观测结果均表明,循环流化床厌氧氨氧化反应器具有较高的生物滞留能力,形成的微生物颗粒具有较佳性能。采用荧光原位测定(FISH)分析结果显示,厌氧氨氧化菌在反应器微生物群落中含量超过70%。A new hybrid reactor combined the advantages of fluidized bed with fluidization achieved by internal recirculation and fixed bed using nonwoven fabrics as biomass carrier is developed. Its potential nitrogen removal property is evaluated. The results show that, the hybrid reactor can operate stably for about 270 days. The total nitrogen removal rate and nitrite removal rate are around 80% and above 90%, respectively. The maximum nitrogen loading rate reaches 15.2 kg/m^3 .d-1 with corresponding nitrogen removal rate of 9. 9 kg/m^3.d^-1. The specific anammox activity of 0. 3 kg/ kg.d^-1 is calculated as the result of batch test. Better microbial retention capability and sludge characteristics are also proved by low concentration of effluent suspended solids, granule size distribution assay and SEM observation. FISH analysis reveals an anammox bacterium content over 70%.

关 键 词：厌氧氨氧化 流化床反应器 脱氮效率 

分 类 号：X703[环境科学与工程—环境工程]