浮萍植物在污水处理中的应用研究进展

浮萍科植物是漂浮生长在水流相对平缓的湖泊河湾水面上植物类群,整个植株完全退化为一个呈圆形或椭圆形的叶状体,主要是通过根或叶状体从水中吸收所需的氮磷等各种营养物质.浮萍科植物的氮磷含量和生长速率高并可以耐受多种污水条件,因此这个类群是污水处理生态工程中重要的水生植物类群.以浮萍为主的污水处理系统已得到较多的研究和应用,这类系统最大特点是浮萍的生长可以大量吸收污水中的氮磷,从而具有较高的氮磷去除率,同时生成的生物量可多种方式利用.因此利用这类系统对污水进行氮磷的处理与转化,并将生成的浮萍生物量适当地资源化利用是未来的发展方向.

Application of duckweeds in wastewater treatment

Duckweed species,namely Lemnaceae species,are a group of free-floating aquatic plants.They have leaf-like body,called frond.The frond could proliferate and accumulate biomass rapidly through taking up nutrient such as nitrogen and phosphorus from water.Duckweed species have very high content of nitrogen and phosphorus.They could tolerate many types of wastewater and grow rapidly through taking up nutrient from these wastewater.These make duckweeds to be an important group in the ecological engineering for wastewater treatment.Duckweed wastewater treatment systems have been researched and utilized around the world.The advantage of these systems was high removal of nitrogen and phosphorus and duckweed biomass could be used as valuable resource such as fish feed and manure,which was the direction of them in future.