溶解氧和有机碳源对同步硝化反硝化的影响  

Influences of DO and organic carbon on simultaneous nitrification and denitrification

作　　者：周丹丹[1] 马放[2] 董双石[2] 王宏宇[2] 王鹤立[1] 

机构地区：[1]中国地质大学(北京)水资源与环境学院,北京100083 [2]哈尔滨工业大学市政环境工程学院环境科学与工程系,哈尔滨150090

出　　处：《环境工程学报》2007年第4期25-28,共4页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金重大国际合作项目(50521140075)

摘　　要：利用SBR反应器，探讨了溶解氧（DO）和有机碳源（COD）对同步硝化好氧反硝化的影响。结果表明，DO范围在0．5～0．6mg／L时最适合于同步硝化好氧反硝化脱氮。在同步硝化反硝化过程中出现了亚硝酸盐氮的积累，推断经由短程硝化反硝化途径。总氮的去除率随着COD／N（碳氮比）的增加而增加，当COD／N为10．05时，总氮去除率最高可达70．39％。继续增加碳氮比时，总氮去除率增加不多，并且还会导致硝化作用不完全。当存在足够的易降解有机碳源时，能发生完全的好氧反硝化作用。In a SBR reactor,the influences of dissolved oxygen （DO） and organic carbon source （COD） on simultaneous nitrificaion and denitrification（SND）were studied. The result indicates that it is most suited for simultaneous nitrification and denitrification when DO is in the range of 0.5 - 0.6 mg/L. The phenomenon of nitrate accumulation appears in the course of simultaneous nitrification and denitrifieation, it is inferred that it is via the short distance nitrification and denitrification. The total nitrogen removal rate increases when COD/N is increased, when COD/N is 10.05, total nitrogen removal couldreach the highest rate of 70. 39%. When COD/N increases further, nitrogen removal rate has no obvious growing, and will result in nitrifying function incompletely. A complete aerobic denitrification function can take place when there are enough degradable organic carbon sources.

关 键 词：好氧反硝化 生物脱氮 同步硝化反硝化 

分 类 号：X172[环境科学与工程—环境科学]