人工湿地去污模型的统一结构特征

通过对典型人工湿地去污模型的分析比较，提出了基于各模型微分方程而建立的统一去污模型。该模型能够将典型去污模型作为特例而导出，并能很好地解释这些模型之间的过渡关系。以潜流湿地中NH4^＋和BOD5的降解为例，对统一去污模型的应用情况进行了简单探讨，表明利用统一去污模型结构有助于深入揭示去污机理，从而提出更为精确的去污模型。

Characteristics of the generalized structure of pollutant removal models for constructed wetlands

Based on the analysis of typical existing pollutant removal models for constructed wetlands,this paper presents a generalized expression of various models in terms of differential equations.The proposed generalized expression can not only embrace most existing models as special cases but also interpret the transitions from one model to another.Potential application of the generalized expression was exemplified through the case of NH+4 and BOD5 degradation in subsurface flow constructed wetlands.It was shown that the generalized expression is helpful to reveal the pollutant removal mechanism,and thus it is good for development of more accurate models.