短程硝化过程动力学及有机物影响试验研究  

KINETICS AND EFFECT OF ORGANICS ON SHORT-CUT NITRIFICATION

作　　者：吕永涛[1] 王磊[1] 陈祯 王旭东[1] 吴红亚 王志盈[1] 

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]江苏盛立环保工程有限公司,江苏南京210019 [3]咸阳昱闻土木工程有限公司,陕西咸阳712000

出　　处：《水处理技术》2011年第5期33-36,共4页Technology of Water Treatment

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07212-002);西安市科技计划项目(CXY09025(4));陕西省教育厅专项基金资助项目(09JK543)

摘　　要：在SBR中对自养环境下短程硝化过程动力学和维持初始DO质量浓度不变的条件下有机物对短程硝化的影响进行研究。结果表明,自养环境下,短程硝化过程动力学可以用Monod模型表示,NH4+-N对污泥的最大比氧化速率vmax为13.05 mg.g-.1h-1,NH4+-N半饱和常数Ks为21.98 mg.L-1。DO充足的条件下,低浓度有机物对短程硝化作用影响不大,系统中主要反应为短程硝化;高浓度有机环境下,氨氮降解速率略有下降,亚硝氮积累率降幅较大,TN有损失,系统中除了短程硝化外,还发生了同步硝化反硝化作用。动力学参数vmax随着有机物浓度的增加先变大后减小,在C/N体积比为0.6左右时,vmax达到最大值58.72 mg.g-.1h-1。The kinetics and the effect of organics on short-cut nitrification were investigated while the initial DO concentration was maintained constant in a lab-scaled SBR.The kinetics of short-cut nitrification under autotrophic conditions can be described by the Monod model.vmax of 13.05 mg·g-1·h-1 and Ks of 21.98 mg·L-1 were obtained,respectively.Low organic concentration affected slightly on short-cut nitrification under DO saturation.When the COD was high,the rate of ammonium consumed and the accumulate efficiency decreased.Nitrogen loss was observed due to simultaneous nitrification and denitrification in the system.With the increment of organic matter,the vmax increased first and then decreased.When C/N was 0.6.58.72 mg·g-1·h-1 of a maximum vmax was achieved.

关 键 词：短程硝化 动力学模型 有机物 氨氧化菌 

分 类 号：X703.1[环境科学与工程—环境工程]