缺/好氧环境中Cu^2＋对活性污泥沉降性及脱氮性能的影响  

Influence of Cu^(2+) on Sludge Settleability and Denitrogenation Under Anoxic and Aerobic Conditions

作　　者：彭永臻[1] 张健伟[1] 王杰[1] 张婷[1] 

机构地区：[1]北京工业大学国家工程实验室,北京市污水脱氮除磷处理与过程控制工程技术研究中心,北京100124

出　　处：《北京工业大学学报》2017年第11期1750-1756,共7页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(51578014);北京市教育委员会资助项目

摘　　要：为研究Cu^(2+)在缺氧和好氧不同环境中对活性污泥沉降性及脱氮性能的影响,在3个完全相同以缺氧/好氧方式运行的序批式反应器(SBR)中,采用以乙酸钠为唯一碳源的合成废水,待系统的硝化反硝化过程运行稳定后,SBR 1#作为对照试验,每周期分别在SBR 2#的缺氧段和SBR 3#的好氧段投加Cu SO4溶液,每次按反应器内5mg/L Cu^(2+)投加.研究结果表明:在缺氧段投加Cu^(2+)能引发污泥膨胀,而在好氧段投加Cu^(2+)并未引起污泥沉降性的恶化;在缺好氧环境中Cu^(2+)都未引起丝状菌的大量增殖;Cu^(2+)能刺激微生物分泌更多的胞外聚合物抵御Cu^(2+)的毒害作用,抑制微生物贮存聚-β-羟基烷酸酯(PHA)的能力;在SBR 2#的缺氧段投加Cu^(2+)有利于短程硝化反硝化的形成,但长期投加并不能维持短程硝化,而在SBR 3#的好氧段投加Cu^(2+)后,系统迅速丧失脱氮性能.In order to investigate the influence of copper ions on settleability and denitrogenation, three sequencing batch reactors （SBR） equipped with PLC system were operated by synthetic wastewater using acetate as the single carbon source. After the nitrification and denitrification process, when the system was stable, SBR 1# was operated as a control test , copper sulphate solution was dosed to SBR 2# and SBR 3# under anoxic and aerobic conditions in each cycle. The results show that the adding of Cu2 ＋ under anoxic zone leads to deterioration of sludge sedimentation, but in the aerobic stage, Cu2＋ does not cause the deterioration of sludge settling. The presence of Cu2＋ under anoxic and aerobic conditions do not cause proliferation of filamentous bacteria. The dosing of Cu2 ＋ stimulated the secretion of more extracellular polymers against the toxic effects of Cu2 ＋ and inhibited the ability of microorganisms to store PHA. The presence of Cu2＋ under anoxic condition of SBR 2# is contributed to the formation of shortcut nitrification and denitrification, but the shortcut nitrification can not be maintained by longterm dosing. The adding Cu2＋ in the aerobic stage of SBR 3# causes the rapid loss of nitrification and denitrification.

关 键 词：污泥沉降性 铜离子 丝状菌 胞外聚合物 脱氮 

分 类 号：U461[机械工程—车辆工程] TP308[交通运输工程—载运工具运用工程]