摘要
通过对湿地不同功能区——沉淀池、潜流区和表流区的现场观测,并采用线性回归方法分析观测数据,比较各功能区除氮效果的差异。研究发现沉淀池除氮效果不明显,但在该区内,有机氮可能发生矿化作用而转变为氨氮;有植物系统的潜流和表流区除氮效果较为明显,其中表流区除氮效果优于潜流区,该区活跃的植物生长及微生物作用有效地降解、消减了各形态的氮。针对污染物的化学组分,选用合适的功能区,并加以串联组合,将有助于提高综合去污效果。
The nitrogen removal efficiency of different function units including sedimentation tank（ST）, subsurface flow unit（SSF） and free water surface（FWS） unit for a constructed wetland is investigated. In-situ observations were carried out to obtain inflow and outflow nitrogen concentration data for each unit, and the linear regression method was employed to analyze the data. The nitrogen removal in the ST unit is not apparent, while the SSF and FWS units demonstrate some removal efficiency for nitrogen, and among which, the FWS unit has a noticeable effect on nitrogen removal due to its active system of hydrophytes and microorganism function. According to the chemical composition of the pollution sources, a reasonable design and combination of different units may improve the overall purification efficiency.
出处
《科学技术与工程》
2006年第6期723-725,共3页
Science Technology and Engineering
基金
国家自然科学基金(40471018)中国科学院"百人计划"项目南京地理与湖泊研究所所长基金(CXNIGLAS-2004-1)教育部留学回国人员科研启动基金南京市留学人员科技活动基金共同资助
关键词
人工湿地
功能区
除氮效果
constructed wetland
function unit
nitrogen removal efficiency
