ABSTRACT

There are several techniques for sizing horizontal subsurface-flow constructed wetlands systems (CWs), and mathematical models have been frequently used for this purpose because they more accurately represent the liquid behaviour in these reactors. The P-k-C* model has already been used in the prediction of organic matter removal in CWs, but it has been little explored in the literature. On other hand, the model proposed by Chan and Chu [Modeling the reaction kinetics of Fenton’s process on the removal of atrazine. Chemosphere. 2003;51(4):305–311] was not known for prediction of organic matter removal in CW systems. In the present work, the kinetic data for chemical oxygen demand (COD) removal of 28 horizontal subsurface-flow constructed wetlands were used to compare the performance of two pseudo-first-order kinetic models (P-k-C* model and model from Chan and Chu. The comparisons of nonlinear regressions were performed considering Akaike information criterion (AIC), root-mean-square error (RMSE), and adjusted coefficient of determination ($R_{\mathrm{a}\mathrm{d}\mathrm{j}}^2$). In general, both models were able to provide good predictions of relative remaining concentration (C/C₀). However, the Chan and Chu model produced higher adjustment coefficients, showing the potential to be used in modelling and simulation of the degradation kinetics of organic matter in wetlands.

摘要

有多种技术可用于确定水平地下流人工湿地系统 (CW) 的大小，并且数学模型经常用于此目的，因为它们更准确地表示这些反应器中的液体行为。PkC* 模型已被用于预测 CW 中的有机物去除，但在文献中鲜有探讨。另一方面，Chan 和 Chu 提出的模型 [模拟芬顿过程中去除莠去津的反应动力学。化学圈。2003;51(4):305-311] 不知道 CW 系统中有机物去除的预测。在目前的工作中，${\mathrm{电阻}}_{\mathrm{一种}\mathrm{d}\mathrm{j}}^2$）。一般而言，两种模型都能够提供相对剩余浓度 ( C / C ₀ ) 的良好预测。然而，Chan 和 Chu 模型产生了更高的调整系数，显示了用于建模和模拟湿地有机物降解动力学的潜力。