| 饮用水生物处理小试工艺中NH_4~+-N的非硝化去除途径分析 | |
| 于鑫 ; 叶林 ; 李旭东 ; 张晓健 ; 施旭 ; 刘波 ; 李睿华 ; YU Xin ; YE Lin ; LI Xu-dong ; ZHANG Xiao-jian ; SHI Xu ; LIU Bo ; LI Rui-hua | |
| 2010-05-13 ; 2010-05-13 | |
| 关键词 | 饮用水 生物处理 NH4+-N 氮亏损 硝化作用 自养脱氮 drinking water biological processes NH~+_4-N nitrogen loss nitrification autotrophic removal of nitrogen TU991.2 |
| 其他题名 | Non-nitrification Pathway for NH_4~+-N Removal in Pilot-Scale Drinking Water Biological Processes |
| 中文摘要 | 通过计算N和DO的质量平衡,研究饮用水生物处理小试工艺中是否存在NH4+-N的非硝化去除途径,并探讨其可能机制.结果表明,当生物流化床和生物滤池进水NH4+-N浓度大于2 mg/L时,前者进水的NH4+-N、NO2--N和NO3--N之和比出水高出0.91 mg/L,后者理论上消耗的DO比实际多约2.90 mg/L,说明这2种工艺中均有氮亏损现象发生,一部分NH4+-N通过与DO无关的非硝化作用被去除.对非硝化去除途径的分析表明,因为反应器对磷元素和有机物的利用不随氮亏损发生变化,可以排除掉同化作用和反硝化作用;因为反应器进水低碳高氮的特性和NO2--N的积累与发生氮亏损的废水生物处理系统相似,据此提出在生物膜缺氧内部发生、通过短程硝化和厌氧氨氧化的偶联(或OLAND反应)将NH4+-N和NO2--N同时转变为N2脱除的自养脱氮是饮用水生物处理中氮亏损的可能途径.; The non-nitrification pathway for NH~+_4-N removal in pilot-scale drinking water biological treatment processes and its possible mechanism were investigated through calculating N and DO stoichiometric balance.With more than 2(mg/L) NH~+_4-N in the influent,for the fluidized bed bioreactor(FBBR),the total of NH~+_4-N,(NO~-_2-N),(NO~-_3-N) in the influent was 0.91(mg/L) higher than that in the effluent,and for the biofilter,its DO consumption was 2.90(mg/L) less than the stoichiometric amount.The results suggested that nitrogen loss occurred in both reactors and a part of NH~+_4-N was removed through non-nitrification pathway.Because the utilization of phosphorus and organic matters was independent of nitrogen loss,the assimilation and denitrification could be excluded from the possible mechanisms.Because the very low(C/N) in the influent and the accumulation of(NO~-_2-N) in the reactors were similar with the wastewater biological processes,the "autotrophic removal of nitrogen" was regarded as the most probable non-nitrification pathway.In this mechanism,the couple of short-cut nitrification and ANAMMOX(or OLAND) leading to the transformation of NH~+_4-N and(NO~-_2N) into gaseous N_2 was responsible for the nitrogen loss in drinking water biological processes. |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/30640]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 于鑫,叶林,李旭东,等. 饮用水生物处理小试工艺中NH_4~+-N的非硝化去除途径分析[J],2010, 2010. |
| APA | 于鑫.,叶林.,李旭东.,张晓健.,施旭.,...&LI Rui-hua.(2010).饮用水生物处理小试工艺中NH_4~+-N的非硝化去除途径分析.. |
| MLA | 于鑫,et al."饮用水生物处理小试工艺中NH_4~+-N的非硝化去除途径分析".(2010). |
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