人工湿地除磷存在的问题及其对策探讨

人工湿地是20世纪七八十年代发展起来的一种污水生态处理技术,能高效去除有机污染物,氮、磷等营养物,近年来得到了广泛的应用。对磷的去除不同于常规化学除磷或生化处理工艺,而是集物理化学法和生物法于一体,即通过基质、水生植物及微生物的协同作用完成。基质容易达到饱和是人工湿地除磷面临的主要问题,进水水质、水力条件、温度变化等条件也不同程度影响人工湿地的除磷效果。针对以上问题,提出了相应对策,以实现人工湿地除磷系统的稳定运行。

Problems and Countermeasures of Phosphorus Removal in Constructed Wetland

Constructed wetland, which has a high removing rate of organic pollutant, nitrogen, phosphorus and other nutrients is an ecological wastewater treatment technology developed in seventies and eighties of the 20th century. It has been widely applied in recent years. The removal of phosphorus is different from conventional chemical phosphorus removal or biochemical process, but combining physico - chemical and biological treatments or the interaction of the substrate, plants and microorganisms. But the main problem is the substrate easy to saturate. The water quality, hydraulic condition and the change of temperature also influence the removal rate of phosphorus. This article proposed some countermeasures to these problems in order to keep the tranquilization function of the wetland.