DO及HRT对生物接触氧化法中NO_2～--N积累的影响  

Influence of DO and HRT on Nitrite Accumulation on the Biological Contact Oxidation Process

作　　者：张利[1] 屈春香[1] 田浏[1] 冯志江[1] 刘文[1] 戴捷[1] 

机构地区：[1]长江大学化学与环境工程学院,湖北荆州434023

出　　处：《长江大学学报（自科版）（上旬）》2013年第9期32-34,共3页JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG

基　　金：国家自然科学基金项目(21173026);国家大学生创新训练项目(201210489316)

摘　　要：用厌氧水解-二段生物接触氧化(ABBCO)工艺处理生活污水过程中发现NO-2-N积累现象,通过改变水力条件,研究了溶解氧(DO)和水力停留时间(HRT)对NO-2-N积累的影响。试验结果表明,CODCr(化学需氧量)在250mg/L左右,水温为14.8～22.6℃,pH值为6.5～7.5的相对稳定条件下,控制DO在1.0～6.0mg/L的过程中ABBCO反应器均能实现NO-2-N的积累,NH+4-N去除率达到80%以上;当DO为4～5mg/L时,NH+4-N平均去除率达87.03%,取得较好的NH+4-N去除效果,而该条件下NO-2-N的积累率最大为95.64%;当控制HRT为6h以上,NO-2-N积累率达到50%以上的情况下NH+4-N去除率达到85.88%。Characteristics of nitrite accumulation during denitrification process were found by using anaerobic hydrolysis-2 biological contact oxidation(ABBCO).the effects of dissolved oxygen DO and hydraulic retention time HRT on nitrite accumulation by changing the hydraulic conditions.the results showed that when chemical oxygen demand COD is 250mg/L,the water temperature is 14.8～22.6℃and pH value is 6.5～7.5,the phenomenon of nitrite accumulation and Ammonia nitrogen removal rate reached more than 80% took place by controlling DO from 1.0mg/L to 6.0mg/L. While DO is controlled at 4～5mg/L,the removal ratio of Ammonia nitrogen reach the about 87.03%,but nitrite nitrogen accumulated rate reach the about 95.64%;While HRT is controlled at 6h,Nitrite accumulation rate reached 50% under the condition of ammonia nitrogen removal rate reached 85.88%.

关 键 词：生物接触氧化 NO2^--N积累 溶解氧 水力停留时间 

分 类 号：X703[环境科学与工程—环境工程]