好氧段对反硝化除磷系统的影响  

Process of Oxic to Affect the System of Denitrifying Phosphorus Removal

作　　者：高小平[1] 吉芳英[1] 丁彩娟[1] 左宁[1] 张斌[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400030

出　　处：《重庆大学学报（自然科学版）》2005年第3期106-109,120,共5页Journal of Chongqing University

基　　金：国家自然科学基金资助课题(50278101);重庆大学骨干教师资助课题(1-57)

摘　　要：生物除磷系统在厌氧 /缺氧交替变化的环境中可以发生反硝化除磷现象,通过研究发现:没有好氧段的A/A-SBR系统除磷能力低于有好氧段的A/AO-SBR系统,而且随着运行时间的增加A/A-SBR系统的除磷能力逐渐减弱,污泥产率也从起始的 0. 22gMLSS/gCOD·d逐渐下降趋于零增长甚至负增长。试验结果表明,设置后好氧段是保证反硝化除磷系统稳定运行的关键。但是,较长的好氧时间将导致NO3 -N的积累,并抑制A/AO-SBR系统除磷,而 0. 5h的后好氧时间既可以确保A/AO-SBR反硝化除磷系统的稳定运行又可以获得好的除磷效果。The phenomenon of denitrifying can be found under the condition of anaerobic/anoxic(A/A) in the biological phosphorus removal. It is found through the test that: The ability of denitrifying phosphorus removal in the system of A/A-SBR is lower than the system of A/AO-SBR, and along with the time increasing in the system of A/A-SBR, the ability of phosphorus removal would weaken, Ys will also decrease gradually from initial 0.22 gMLSS/gCOD.d to zero or even minus. The result of test indicates that the key to make the system oprerate steadily is increasing the latter aerobic time. However,the longer aerobic time will result in the accumulation of NO_3-N, and restrain the system of A/AO-SBR from removing phosphorus. It is also found in the test that the latter aeration for 0.5 h would ensure not only steady operation, but also good effect of phosphorus removal in the system of A/AO-SBR.

关 键 词：反硝化除磷 好氧时间 A/A—SBR A/AO—SBR 生物除磷脱氮 

分 类 号：X505[环境科学与工程—环境工程]