模拟回用水管道中的反硝化现象研究  

Denitrification in Reclaimed Water Distribution System

作　　者：王怡[1] 柯利[1] 范丽龑[1] 彭党聪[1] 夏四清[1,2] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]同济大学环境科学与工程学院,上海200092

出　　处：《中国给水排水》2014年第9期1-4,共4页China Water & Wastewater

基　　金：国家自然科学基金青年基金资助项目(51108368);陕西省国际合作项目(2011KW-34);教育部留学回国人员启动基金资助项目(2011-1139)

摘　　要：回用水管网中的反硝化可以去除水中的硝态氮(或亚硝态氮)及微量的有机质,对于提高回用水水质具有积极意义。以西安市某再生水厂出水为原水,采用4个完全混合式CDC生物膜反应器串联模拟回用水管道,探讨了回用水管道的反硝化现象。连续8个月的运行结果表明,70%的水样通过模拟管道反应器后出现了氮的损失。沿程水质分析、生物膜表面电镜扫描以及反硝化速率测定结果表明,系统具备反硝化所需的碳源条件,且硝化和反硝化是同时发生的;生物膜表面普遍存在通气孔,管道始端的生物膜反硝化速率可达160.08 mgNO-3-N/(h·m2)。Denitrificafion in reclaimed water and trace organic compounds in water, which has distribution system can remove nitrate （or nitrite） positive significance for improving reclaimed water quality. Four modified CDC biofilm reactors were connected in series to simulate a reclaimed water distribution system carrying the finished water from a wastewater treatment and reuse plant located in Xi＇ an. Denitrification in the reclaimed water distribution system was investigated. Results from 8 months of continuous operation showed that nitrogen loss appeared in about 70% of the samples. In addition, analysis of water quality and biofilm along the modified CDC biofilm reactors showed that carbon source for denitrification was attainable and simultaneous nitrification and denitrification could occur. Meanwhile, denitrification pores on the biofilm surface appeared universally, and the denitrification rate of the biofilm reached 160.08mg NO3^--N/（h·m^2 ） at the beginning of the reclaimed water distribution system.

关 键 词：反硝化 回用水管道 CDC生物膜反应器 

分 类 号：X703[环境科学与工程—环境工程]