镉对污水生物脱氮反应动力学的影响研究  

Impacts of Cd on the Kinetics of Biological Nitrogen Removal During the Wastewater Treatment Process

作　　者：侯昭牧[1] 李晓晨[1] 孙淑娟[1] 王伟[1] 江丹丹[1] 

机构地区：[1]山东农业大学水利土木工程学院,山东泰安271018

出　　处：《人民黄河》2013年第9期64-67,共4页Yellow River

基　　金：中国博士后科学基金资助项目(20080431214);山东农业大学青年创新基金资助项目

摘　　要：通过批量试验检测COD、NH+4-N和NOx-N的去除率和比降解速率,研究了Cd2+对活性污泥生物脱氮反应动力学的影响。结果表明:在硝化反应和反硝化反应有机物降解过程中,5 mg/L的Cd2+即会对有机物的去除率产生抑制作用,20 mg/L的Cd2+对有机物去除率和有机物比降解速率有显著抑制效应;在硝化反应NH+4-N的去除过程中,20mg/L的Cd2+会显著抑制对NH+4-N的去除,10 mg/L的Cd2+可造成比硝化速率的显著降低;在反硝化反应NOx-N的去除过程中,Cd2+对NOx-N去除率没有显著影响,20 mg/L的Cd2+对比反硝化速率有显著抑制效应。The impacts of Cd2＋ on the kinetics including the organic substrate, ammonium and nitrate reinoval, were invrestigated through five iden- tical batch assays set with Cd2 ＋ loading of 0, 5, 10, 20 and 40 mg/L respectively. The results indicate that in the organic substrate removal process of nitrification and denitrification, Cd2＋ loading concentration of 5 mg/L slightly inhibited the COD removal rate ; significant decreases were observed in the COD removal rate and specific COD removal rate with the Cd2 ＋ loading concentration above 20 mg/L into the system. In the nitrifi- cation process, Cd2＋ loading concentration of 20 mg/L significantly inhibits the NH4＋ - N removal rate and Cd2＋ loading concentration of 10 mg/L significantly inhibits the specific ammonia uptake late （sAUR）. In the denitrification process, Cd2＋ has no significant effects on the NOx - N re- moval rate and Cd2 ＋ loading concentration of 20 mg/L greatly inhibits the specific nitrate uptake rate （sNUR）.

关 键 词：镉 生物脱氮 活性污泥 硝化 反硝化 污水处理 

分 类 号：X522[环境科学与工程—环境工程]