摘要
人工湿地作为一种高效、低耗的污水处理新工艺已被广泛接受,特别是其在脱氮、除磷方面的应用逐步为人们所重视。本文深入地讨论了表面流人工湿地中各种生物、物理、化学过程对污水中各种形态含氮、含磷化合物的去除机理,及其具体途径、相关反应和反应类型,总结了国内外对各个过程影响因素、控制条件、反应速度、去除能力及相互之间协调拮抗作用的研究结果。虽然硝化/反硝化作用和土壤吸附沉淀作用已被公认为是表面流人工湿地脱氮、除磷的主要途径,但不同研究结果之间仍存在着明显差异,鲜有多介质环境条件下各种脱氮、除磷过程中多种氮、磷形态的质量平衡研究,而以此为基础的人工湿地生态动力学模型的研究则是深入了解人工湿地运行机理、设计和预测其处理效率,以及推动人工湿地污水处理工艺广泛应用的关键。
The mechanism of nitrogen and phosphorus compound removal by the biological, physical and chemical processes in the free-water surface constructed wetlands is reviewed in this paper. Denitrification and sedimentation to the soil are widely accepted as the main pathways through which nitrogen and phosphorus are removed from the wastewater by free-water surface constructed wetlands, but there are significant differences among different researches, and further researches are still required to get detailed information of these processes and pathways for establishing the ecosystem dynamic models, in order to design and predict the performance of free-water surface constructed wetlands, and enhance its application to wastewater treatment.
出处
《生态环境》
CSCD
2004年第1期98-101,共4页
Ecology and Environmnet
基金
国家科技部"十五"重大专项(2002AA601023)
江苏省高校省级重点实验室开放基金项目(KJS03071)
