pH值对厌氧氨氧化与反硝化耦合脱氮性能的影响

Effect of pH Value on Denitrification Performance of Anaerobic Ammonium Oxidation and Denitrification Coupling System

厌氧氨氧化与反硝化耦合系统在运行过程中容易受到很多因素的影响,包括温度、水力停留时间、C/N、pH值等。试验开展了p H值对厌氧氨氧化与反硝化耦合脱氮的影响研究。试验通过设置p H值梯度为7.0、7.5、8.0和8.5,测定反应系统氨氮、硝氮去除率,确定厌氧氨氧化与反硝化耦合工艺运行的最佳p H值。结果表明:pH值为7.5时最适宜,此时氨氮去除率达55%,硝氮去除率80%左右,耦合系统运行平稳恒定。

The anaerobic ammonia oxidation and denitrification coupling system is easily affected by many factors,including temperature,hydraulic residence time,C/N,pH value and so on.In this paper,influence of pH value on the denitrification performance of anaerobic ammoxidation and denitrification coupling system was investigated.At pH values of 7.0,7.5,8.0and 8.5,the removal rates of ammonia nitrogen and nitrate in the reaction system were determined,and the optimal pH value of anaerobic ammonia oxidation and denitrification coupled process was determined.The results showed that the optimal pH value was 7.5,at which the removal rate of ammonia nitrogen was up to 55%,and the removal rate of nitrate nitrogen was about 80%.The coupled system was stable and constant.