【摘要】 以巢湖十五里河河口湿地项目为例，比较分析多级塘湿地净化系统各处理单元与河道原位净化系统对营养物质和透明度的改善效果，探索湿地的脱氮除磷途径。结果表明，多级塘湿地和河道原位净化系统对氨氮的去除效果较好，分别为84.24%与33.58%;多级塘湿地净化系统总氮去除率(42.90%)和总磷去除率(47.22%)要优于河道原位净化系统(19.94%、27.66%)。氮在湿地中的去除途径以植物吸收和微生物反硝化为主，磷去除途径以物理沉淀和化学吸附为主。水体透明度主要的影响因素为悬浮颗粒物浓度。相较于前序处理塘，生态塘和植物塘对透明度提升效果一般，主要是因为鱼类扰动和植物腐烂引起的。建议根据来水营养物浓度不同，调整各处理单元的水力停留时间，加强鱼类结构调整和沉水植物维护，提升湿地运行效果。更多还原

【Abstract】 Based on Shiwuli River Estuarine Wetland project in Chaohu, the effects on nutrient removal and transparency enhancement of multi-pond wetland system and riverway in-situ purification system were compared and analyzed, and the removal pathways of nitrogen and phosphorus were explore. The results showed that both multi-pond wetland system and riverway in-situ purification system had relatively good removal efficiencies in ammonia nitrogen, 84.24% and 33.58%,respectively. The removal efficiency of TN(42.90%) and TP(47.22%) in multi-pond wetland system was better than of riverway in-situ purification system(19.94% and 27.66%). The major removal pathways of nitrogen were absorption by plants and denitrification of microorganisms. The major removal pathways of phosphorus were physical precipitation and chemical adsorption. It was found that the suspended particulate was key factor in water transparency improvement. Compared to previous ponds, the biological and aquatic plant pond had relatively low water transparency due to fish disturbance and plant decomposition. Based on nutrient concentration of the influent, it was suggested that the hydraulic retention time of each treatment unit should be adjusted, and the fish structure adjustment and submerged plant maintenance should be enhanced, so as to improve the purification effect of the wetland system.更多还原