NO_2^-作为缺氧吸磷电子受体的试验研究  

Experiment Study on Anoxic Phosphate Accumulation with Nitrite

作　　者：张小玲[1] 王磊[2] 王志盈[2] 

机构地区：[1]长安大学环境科学与工程学院,西安710064 [2]西安建筑科技大学环境与市政工程学院,西安710055

出　　处：《环境科学》2006年第5期930-934,共5页Environmental Science

基　　金：国家自然科学基金项目(50178059);长安大学青年基金项目(05Q11)

摘　　要：利用SBR反应器,采用NO2-的2种投加方式研究了以NO2-为电子受体吸磷的聚磷菌的诱导过程.采用NO2-连续投加方式,经过23d的诱导,聚磷菌可以利用NO2-为电子受体吸磷,最大吸磷速率达到10.44 mg/(g.h),缺氧吸磷量占缺氧和好氧吸磷总量的97%以上;比较NO2-的2种投加方式,发现NO2-集中投加方式的缺氧吸磷速率及缺氧段吸磷百分数都小于连续投加的运行方式,为了得到较好的缺氧聚磷效果,建议采用连续加入NO2-的运行方式.在SBR反应器内,通过调节COD负荷、沉淀时间、HRT等操作条件,培养出了具有反硝化聚磷能力的颗粒污泥,颗粒污泥的平均粒径为315μm,污泥比重在1.006 4~1.016 5之间,含水率为96.78%~98.14%,SVI在25~40 mL/g之间.试验中COD处理负荷高达1.5 kg/(m3.d),氮、磷的去除率也在90%以上.Biological phosphorus removal with nitrite was studied in an Sequencing Batch Reactor. The results showed that nitrite can be used as electron acceptor in denitrifying phosphorus removal. Feed mode of nitrite had significant influence on denitrifying phosphorus removal. Anoxic phosphorus assimilation rate could be reached 10.44 mg/（g·h） and percentage of anoxie phosphorus assimilation amount was more than 97 %. Granular sludge with denitrifying phosphorus removal activity was cultivated in an SBR. The effects of different operational conditions on formation of granular were studied such as COD loading, settling time, HRT and so on. The average dimension of granular was 315μm. Its water content was at 96.78% ～98.14%, specific gravity 1.0064～1.016 5, SVI of sludge 25～40mL/g, COD removal loading could be reached to 1.5 kg/（m^3·d）, nitrogen and phosphorus removal efficiency was more than 90 %.

关 键 词：SBR NO2^- 反硝化聚磷 颗粒污泥 

分 类 号：X703.1[环境科学与工程—环境工程]