低浓度氨氮硝化过程中影响因素的研究  

Effects of factors affecting nitrification at low ammonia concentration

作　　者：李娟英[1] 赵庆祥[2] 

机构地区：[1]上海水产大学生命科学与技术学院,上海200090 [2]华东理工大学资源与环境工程学院,上海200237

出　　处：《环境污染与防治》2006年第1期11-13,24,共4页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.20077007)。

摘　　要：一般来说硝化细菌对环境条件的变化比较敏感,而在低浓度氨氮系统中,硝化细菌对环境条件变化的敏感度比高浓度系统更大,而且其影响规律也有所不同。用富集培养的硝化细菌就温度、pH和碱度对高、低浓度氨氮硝化的影响做了研究。结果表明,低浓度氨氮硝化的温度系数(θ=1.105)大于高浓度(θ=1.099),温度对低浓度氨氮硝化的影响较高浓度大;偏碱性的环境更有利于低浓度氨氮硝化的进行,因此低浓度氨氮硝化的最优pH和Alk/N值都较高浓度高。和温度相比,pH和碱度是影响低浓度氨氮硝化过程的主要因素。Nitrifying bacteria are very sensitive to the changes of environmental conditions, especially at a low ammonia concentration environment. Effects of temperature, pH and alkalinity on nitrification were determined using enriched nitrifying bacteria. The temperature effect was slightly greater at NH3-N = 3 vs. 100 mg/L. The alkaline condition was favorable to achieve complete nitrification at a low ammonia concentration, pH and alkalinity had greater impacts than temperature on nitrification at low ammonia concentration.

关 键 词：硝化温度pH 碱度 NH3 

分 类 号：X703[环境科学与工程—环境工程] TQ153.11[化学工程—电化学工业]