应用呼吸-滴定测量监测硝化动态过程

将pH值在线监测与药品自动投加系统与已开发的混合呼吸测量仪集成,组成自动呼吸-滴定测量仪,同时测定废水生物处理过程氧气利用速率(OUR)和质子变化速率(HVR).对活性污泥硝化过程定时测定NH4+-N浓度,比较其与基于HVR或OUR预测的NH4+-N浓度间的一致程度,评估自动滴定测量装置测试硝化过程动态的性能.结果表明,在初始NH4+-N浓度分别为20,25mg/L的间歇试验中,实测值数组与基于OUR的预测值数组间的相关系数分别为0.9967和0.9972,与基于HVR的预测值数组间的相关系数分别为0.9991和0.9992,表明OUR和HVR均能及时准确地反映硝化过程的动态特性.

Monitoring the dynamic process of nitrification with respirometry-titrimetry

A set of automatically respirometric-titrimetric system to monitor simultaneously oxygen uptake rate(OUR)and hydrogen ion variation rate(HVR) was developed, which consists of the pH monitoring unit, titrant auto-dosing unit and hybrid respirometer. Timely sampling and measuring the NH4+-N concentration in the nitrifying process, the accuracy of the system for monitoring dynamic process of nitrification was evaluated by comparing the consistency between the measured NH4+-N concentration and the predicted concentration based on OUR and HVR respectively. For the batch experiments process with initial NH4+-N concentrations of 20 and 25 mg/L respectively, the correlation coefficients between the measured value and the predicted value based on OUR were 0.9967 and 0.9972, 0.9991 and 0.9992 between the measured value and the predicted value based on HVR, that showed that the dynamic process of nitrification could be timely and accurately presented with measuring OUR and HVR in the process.