常温下A/O工艺的短程硝化反硝化  

Short-cut Nitrification and Denitrification by Using A/O Process at Ambient Temperature

作　　者：陈韬[1] 王淑莹[2] 彭永臻[2] 田文军[3] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]北京工业大学环境与能源工程学院,北京100022 [3]中国市政工程华北设计研究院,天津300074

出　　处：《中国给水排水》2002年第12期5-8,共4页China Water & Wastewater

基　　金：国家自然科学基金重点项目 (5 0 1380 10 );北京市自然科学基金项目 (80 0 2 0 0 5 )

摘　　要：采用A O工艺处理模拟生活污水 ,考察了pH值、游离氨 (FA)、DO、HRT等因素的影响。试验结果表明 ,A O工艺在常温 (18～ 2 5℃ )和pH <7.5时可以发生比较稳定的短程硝化反硝化 ;即使FA浓度低达 0 .0 6mg L也会对硝化菌属产生抑制作用 ,但FA浓度不会单独成为影响亚硝酸盐积累的主要因素 ;反硝化是否彻底将影响硝化类型 ,反硝化不完全时硝化类型向全程硝化反硝化转化 ,而一旦反硝化进行得比较彻底则可在短时间内恢复短程硝化反硝化 ;因硝化反应存在滞后现象 ,故控制较短的HRT有助于NO-2 -N的积累 ,而延时曝气则可以减少NO-2 -N的积累。A/O process was used for treatment of the simulated domestic sewage in order to investigate the effect of pH, free ammonia (FA), DO , and HRT , etc. The test result showed that the short-cut nitrification and denitrification can be steadily achieved at ambient temperature (18～25℃) and pH <7.5 by using A/O process; even if FA is as low as 0.06 mg/L, it will also inhibit nitrobacter. However, FA itself will not become the main factor affecting the accumulation of nitrite. Whether denitrification process proceeds thoroughly will affect the type of nitrification; incomplete denitrification will result in the transfer to whole-run nitrification and denitrification, and if denitrification proceeds thoroughly, short-cut nitrification and denitrification will recover in a short while. There is lagging in nitrification, therefore short HRT will contribute to the accumulation of NO - 2-N, and extended aeration can reduce the accumulation of NO - 2-N.

关 键 词：短程硝化反硝化 A/O工艺 FA NO2^--N 

分 类 号：X799.3[环境科学与工程—环境工程]