不同潜流湿地去除污水中磷素的反应动力学

Analysis on Reaction Kinetics for Phosphorus Removal of Sewage in Different Subsurface Flow Constructed Wetlands

采用不同潜流型人工湿地对污水处理厂二级出水进行深度处理研究,分析其对磷素去除效果及其反应动力学模型。结果表明,在选取相同水力负荷条件下,与垂直潜流湿地相比,水平潜流湿地对污水中的磷素的去除表现出了较好的去除趋势;而与水平-沸石湿地相比,水平-石灰石湿地则表现出了对磷素更佳的去除效果,其去除率则基本稳定在66.3±3.32%~92.0±4.82%。另外,根据反应动力学模拟分析可知,四种潜流湿地符合一级反应动力学方程特点,即其对磷素的去除过程基本可以认为只进行到一级反应。

Different Subsurface flow constructed wetlands were adapted to advanced treat sewage treatment plant secondary effluent, and analyze the effect of phosphorus removal and its reaction kinetics model. The results showed that horizontal subsurface flow wetland removal of phosphorus in sewage exhibited a better removal trends compared with vertical undercurrent wetlands; and compared with horizontal zeolite wet- land, horizontal limestone wetland exhibited better phosphorus removal effect, the removal rate basically retained at 66.3 subsurface constructed wetlands ; phosphorus ; secondary effluent from sewage treatment plant reaction kinetics model3.32% to 92.0 subsurface constructed wetlands ; phosphorus ; secondary effluent from sewage treatment plant reaction kinetics model 4.82%. In addition, based on the reaction dynamics simulation analy- sis, the results showed four subsurface flow wetlands were in line with the characteristics of first--order kinetics equation, i.e. phosphorus removal process was basically carried out to a reaction.