人工土层快滤系统主要设计参数优化研究——去除COD的参数优化

Optimization of main designed parameters of artificial rapid infiltration land treatment system-COD removal.

在实验室条件下模拟了人工土层快滤系统,运用均匀设计原理来寻求最佳COD去除率的主要设计参数的方法,即人工土组成(石英砂/土)、运行周期(淹水时间、湿干比)等。用倒数方程法来求得系统的COD稳定去除率,利用逐步回归法,建立了人工快速渗滤系统的主要设计参数与COD去除率之间的多元线性回归模型。研究结果得到的主要参数优化方案是石英砂/土=1.073,淹水时间=4h,湿干比=1/8,理论最大COD去除率为84.73%。理论结果与验证结果基本一致,表明此方法是可行的。同时,从优化模型中可以看出人工土组成与湿干比存在交互作用。

In this paper, the Artificial Rapid Infiltration System （ARI） was simulated under laboratory conditions, and the main designed parameters including the component of artificial soil （quartzite/soil） and running circle （flooding time and flooding time/drying time） for the highest removal rate of COD were optimized. The stable removal rate of COD was obtained by the reciprocal equation method, and the model of multi-linear regression equation was established by stepwise regressive method. The optimizing parameters of ARJ were x1（quartzite/soil） = 1.073, x2（flooding time） = 4 h, and x3（flooding time/drying time） = 1/8, and the highest theoretical removal rate of COD was 84. 73 %, which was accordant with the practical value, indicating that the method was feasible, The model also suggested that there was an interaction between the component of artificial soil and the flooding time/drying time.