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中文摘要：
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NO-2-N积累,而不采用在线过程控制,NO-2-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.
英文摘要：
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.
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