作　　者： ; ; ; ; ;

机构地区： 西安建筑科技大学环境与市政工程学院

出　　处： 《中国给水排水》 2010年第21期21-24,29,共5页

摘　　要： 采用微电极考察了SBR系统活性污泥微环境中的硝化反应。结果表明:当活性污泥絮体中的DO为1.95 mg/L时,絮体处于好氧状态,仅发生硝化反应,氨氮转化为硝态氮的比率较高;而当DO为0.24 mg/L时硝化反应受到抑制,氨氮转化为硝态氮的比率降低。另外,当进水NH4+-N为6.5 mg/L时硝化反应进行得较完全;当进水NH4+-N为13 mg/L时硝化反应进行得不完全,去除的氨氮中只有40%转化为硝态氮。借助微电极能从微观角度验证SBR反应器内发生的硝化反应,量化絮体内部DO、NO3-、NO2-和NH4+浓度的变化,因而将其作为微观测定工具应用于SBR系统是可行的。 Nitrification in micro-environment of SBR system was investigated with microelectrode. The results show that when DO in activated sludge floc is 1.95 mg/L, aerobic environment can be obtained, and only nitrification is observed with high transformation rate from ammonia nitrogen to nitrate nitrogen. However, when DO is 0.24 mg/L, nitrification is inhibited, and the transformation rate from ammonia nitrogen to nitrate nitrogen is decreased. The complete nitrification occurs when the influent am- monia nitrogen is 6.5 mg/L, while the incomplete nitrification occurs when the influent ammonia nitrogen is 13 mg/L. About 40% of removed ammonia nitrogen is transformed into nitrate nitrogen. Microelectrode can verify the nitrification in SBR reactor from the microscopic viewpoint and quantify the concentrations of DO, NO3^- , NO2^- and NH4^＋ in the floc, so it is feasible to be considered as a tool used for SBR system.

关 键 词： 微电极 活性污泥 硝化

领　　域： [环境科学与工程]