A/O生物脱氮工艺处理生活污水中试(三)短程硝化过程控制的研究  

A/O pilot-scale nitrogen removal process treating domestic wastewater Ⅲ. The study of nitritation process control

作　　者：马勇[1] 李军[2] 吴学蕾[3] 彭永臻[1] 

机构地区：[1]哈尔滨工业大学,市政与环境工程学院哈尔滨150090 [2]浙江工业大学建筑工程学院,杭州310014 [3]北京市水质科学与水环境恢复工程重点实验室,北京工业大学北京100022

出　　处：《环境科学学报》2006年第5期716-721,共6页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金-国际(地区)重大合作项目(No.50521140075);北京市重点实验室开放基金~~

摘　　要：应用A/O生物脱氮中试试验装置处理实际生活污水,考察了生物脱氮过程中DO和pH的变化规律.结果表明,A/O工艺硝化过程中DO和pH在好氧区的变化可分为3种典型情况,并获得pH曲线可以作为短程硝化反应的控制参数,基于在线过程控制,可以获得稳定较高的NO2--N积累,而不采用在线过程控制,NO2--N积累很不稳定;当亚硝化过程完成继续曝气将造成亚硝酸氮继续氧化为硝酸氮,从而亚硝酸氮积累率降低.应用在线过程控制,不但可提高系统脱氮效率,而且可大大节约系统运行费用.The DO and pH variation laws were investigated in a pilot-scale A/O nitrogen removal system treating domestic wastewater. The results showed that the DO and pH variations along the aerobic zones could be classified into three representative types, and the pH could be used as nitritation control parameter. It could be obtained a high and stable nitrite accumulation with on-line process control at low DO concentration. However, without on-line process control nitrite would be converted to nitrate due to extended aeration when nitritation finished. In addition, using on-line process control could not only improve the nitrogen removal efficiency, but also save operational cost.

关 键 词：A/O生物脱氮工艺 生活污水 在线过程控制 DO pH 亚硝酸氮积累 

分 类 号：X703.1[环境科学与工程—环境工程]