污水处理厂流量分配计算方法及试验研究

针对大部分污水处理厂的工艺单元均由多组系列平行独立组成,在实际运行中,受客观条件影响各系列水量分配往往不均衡,会给污水处理厂运行带来很多不利影响,在不具备计量条件的情况下需要一种便捷的方法来获取污水处理厂的配水情况的问题,提出了一种计算污水处理厂配水分布的方法.该方法基于物料平衡原理,通过直接或间接监测配水前后的水质指示指标参数波动,结合数值拟合及动态时间规整算法( dynamic time warping, DTW)对数据进行分析对比,从而计算配水分布情况.通过该方法在某大型污水处理厂进行了试验,计算结果表明模拟流量与实际流量的拟合度较好,其线性相关系数为0.948,平均误差为-2.5%.试验结果表明该方法对于污水处理厂实际应用具有一定参考意义.

Assessment Method and Experiment Study of Wastewater Treatment Flow Distribution

Most of the wastewater treatment plant ( WWTP ) process unites consist of multi parallel series. In applications, under the influence of interference factors the discharge distribution of these series are unbalanced, which will bring lots of adverse effects to the WWTP operation. Therefore, a convenient method is needed to accurately assessment the flow distribution. To solve this problem, a method was proposed to assessment WWTP flow distribution based on material balance principle, by monitoring the fluctuations of indicator values between inlet and outlet flow, numerical fitting and dynamic time warping ( DTW) algorithm was associated to assessment the flow distribution. This method was applied to a large WWTP. Result shows good fitting of actual values and predictive values, the linear correlation coefficient is 0. 948 , and the average error is -2. 5%. This method has certain reference for the WWTP operation.