给水管网中硝化作用的形成特性研究  

Research on Formation Characteristics of Nitrification in Water Distribution System

作　　者：赵乐乐[1] 李星[1] 杨艳玲[1] 黄静[1] 陈伟雄[2] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]广东省建筑设计研究院,广东广州510010

出　　处：《中国给水排水》2011年第9期37-40,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07421-002;2008ZX07422-005)

摘　　要：采用4台BAR反应器串联对氯胺消毒管网中硝化作用的形成特性进行研究,并与实际管网中的水质变化加以比较。测定显示,BAR4中首先出现氨氧化菌(AOB)生长、氨氮降解和硝酸盐氮浓度升高现象;当AOB数量稳定后,模拟管网中的氨氮浓度沿程降低,生物膜及悬浮态AOB数量、亚硝酸盐氮浓度沿程升高到一定值后降低。发生严重硝化的实际管网末梢pH值较出厂水的降低了0.7,出厂水余氯(3.0 mg/L)已不能控制管网中的硝化作用。由于受AOB检测手段的限制,应综合考虑氨氮、余氯、pH值及不同管网点亚硝酸盐氮浓度的变化来判断管网中是否发生了硝化现象。研究表明,4台BAR反应器串联可以模拟发生硝化作用的实际管网中水质的变化。The formation characteristics of nitrification in water distribution system disinfected with chloramine were investigated using four biofilm annular reactors （BAR） in series, which was compared with the practical water distribution system. A decrease in ammonia and an increase in nitrate first occur in BAR4 at the growth stage of AOB. Ammonia is decreased, AOB in biofilm and bulk and nitrite firstly reach a peak then decline along the pipeline when AOB enter a stationary period. The pH can lower 0.7 from water treatment plant to the end of the water distribution system, while maintaining 3.0 mg/L of residual chlorine in finished water can not suppress the nitrification. Because the AOB method is limited, water quality parameters, such as total residual chlorine, pH, ammonia and nitrite in different points of the system should be simultaneously analyzed to predict the potential of nitrification. The four BAR in series can simulate the variation of water quality in the practical water distribution system with nitrification.

关 键 词：硝化作用 氨氧化菌 氯胺消毒 给水管网 

分 类 号：TU991.33[建筑科学—市政工程]