不同脱氮类型和氨氮浓度对N_2O逸出量的影响  

Effects of Different Denitrification Types and Ammonia Nitrogen Concentrations on N_2O Evolution

作　　者：吴振华[1,2] 孙力平[1,2] 李明明[1,2] 许艳梅[1,2] 李亚静[1,2] 

机构地区：[1]天津城建大学环境与市政工程学院,天津300384 [2]天津市水质科学与技术重点实验室,天津300384

出　　处：《中国给水排水》2013年第21期111-114,共4页China Water & Wastewater

摘　　要：采用密闭SBR系统,在双污泥和单污泥系统均能达到高效脱氮除磷的基础上,研究了不同脱氮类型和氨氮浓度对N2O逸出量的影响。结果表明:反硝化除磷和外源反硝化系统中N2O的产生量分别为0.15和0.20 mg/L,各占TN去除量的0.92%和1.52%。反硝化的碳源类型(胞内类聚物和外碳源)对N2O的逸出量没有显著影响。在同等氨氮浓度水平下,混合污泥的N2O逸出量要高于硝化污泥,且受氨氮浓度影响较大。Based on the singleand two-sludge system with high nitrogen and phosphorus removal performance, a closed SBR was used to study the effects of different denitrification types and ammonia nitrogen concentrations on N2O evolution. The results showed that the yields of N2O from denitrifying phosphorus removal system and exogenous denitrification system were 0.15 and 0.20 mg/L, accounting for 0.92% and 1.52% of TN removal, respectively. The carbon source type for denitrification （intracellular polymers and external carbon） had no significant effect on the evolution of N2O. Meanwhile, at the same level of ammonia nitrogen concentration, the evolution of N2O from mixed sludge was more than that from nitrifying sludge and was influenced significantly by ammonia nitrogen concentration.

关 键 词：双污泥系统 单污泥系统 N2O 

分 类 号：X703[环境科学与工程—环境工程]