用微电极测定曝气量对SBR系统中硝化作用的影响  

Effects of aeration quantity on nitrification determined with microelectrode in SBR system

作　　者：王旭东[1] 许维 王磊[1] 吕永涛[1] 崔星[1] 白晓荣[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055 [2]西安市环境保护科学研究院,西安710002

出　　处：《环境工程学报》2010年第12期2705-2708,共4页Chinese Journal of Environmental Engineering

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

摘　　要：为了研究曝气量对硝化作用的影响,实验采用3个相同的SBR装置,分别在曝气量为4、10和16 L/h的条件下处理人工污水,并采用自制的溶解氧、NO3-、NH4+和pH微电极测定了活性污泥絮体内部微元环境中相应基质的浓度。结果表明,曝气量为4 L/h时,活性污泥絮体内存在厌氧微区,NO3--N浓度减小了,发生了反硝化作用;而曝气量为10 L/h和16 L/h时,活性污泥絮体内发生的都是硝化反应,且NH4+-N浓度的减小量、NO3--N浓度的增大量都随着曝气量的增大而增大,pH随着曝气量的增大而减小。To investigate the effects of aeration quantity on nitrification,the same three SBRs with aeration quantities of 4,10 and 16 L/h were adopted to treat synthetic wastewater.Also the self-made microelectrodes of DO,NO3-,NH4＋ and pH were used to determine the substrate concentrations in the internal micro-environment of activated sludge flocs.The results indicated that when the aeration quantity was 4 L/h,there was an anaerobic micro-zone inside the activated sludge floc,the concentration of NO-3-N decreased which showed denitrification happened.When the aeration quantities were 10 L/h and 16 L/h,nitrification occurred inside the activated sludge floc,and with the increase of aeration quantity,the concentration of NH＋4-N decreased,the concentration of NO-3-N increased,and the pH value decreased.

关 键 词：微电极 SBR 硝化 溶解氧 

分 类 号：X703.1[环境科学与工程—环境工程]