摘要
对沸石潜流湿地、砾石潜流湿地和自由表面流人工湿地脱氮除磷性能进行了中试对比试验研究,结果表明:在相同进水水质和水力停留时间为1 d的运行条件下,沸石潜流湿地脱氮效果最佳,总氮去除率接近60%;砾石潜流湿地除磷效果最佳,总磷去除率可达70%;自由表面流人工湿地脱氮除磷效果介于沸石和砾石潜流湿地之间。探讨了三种人工湿地脱氮除磷机理方面的差别,并对其进行了经济性、运行方式等方面的比较。
A pilot-scale experiment was conducted to compare the nitrogen and phosphorus removal performance among the constructed wetlands with a zeolite media substrate, a gravel media substrate, and a soil layer (free surface), respectively. For comparison, we kept a 1 day hydraulic retention time , and fed with the same wastewater in the experiment. The experimental results show that for the zeolite wetland the total nitrogen removal rate is close to 60%, for the gravel wetland phosphorus removal rate is 70% the highest, and the nitrogen and phosphorus removal rate for free surface constructed wetland are between those for zeolite and gravel wetlands. The different nitrogen and phosphorus removal mechanisms for these three wetlands are discussed, and the economic efficiency and operating scheme are compared.
出处
《地学前缘》
EI
CAS
CSCD
北大核心
2005年第U04期73-76,共4页
Earth Science Frontiers
基金
国家科学技术部"十五"科技专项资助(k99 05 35 02)
关键词
人工湿地
脱氮除磷
沸石
砾石
自由表面
constructed wetland
nitrogen and phosphorus removal
zeolite
gravel
free surface
