Nitrogen Removal in an Ecological Ditch Based on an Orthogonal Test

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• 作者：Songmin Li ; Xiaoling Wang ; Jiamin Tu ; Bin Qiao…
• 关键词：Dynamic simulation test ; Ecological ditch ; Nitrogen removal ; Orthogonal test
• 刊名：Water, Air, and Soil Pollution
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：227
• 期：11
• 全文大小：1,268 KB
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Terrestrial Pollution
  Hydrogeology
  
• 出版者：Springer Netherlands
• ISSN：1573-2932
• 卷排序：227

文摘

Agricultural drainage plays a vital role in the discharge of non-point source pollutants into surface-receiving waters. Sustainable drainage management to mitigate nitrogen losses from cultivated land is needed. Many factors influence nitrogen removal in agricultural drainage ditches. However, existing research has not fully considered parameter sensitivity analysis of nitrogen removal. Therefore, in this study, an ecological ditch model containing a permeable dam was built, in which the influent nitrogen concentration, suspended solid concentration, influent flow, and water level were examined as influencing factors. An orthogonal test was conducted to explore the significance of these four factors and their impacts on nitrogen removal as well as the nitrogen transport characteristics along the ditch. The results revealed that the ditches had an interception effect on nitrogen pollutants, and according to importance, the four factors are influent nitrogen concentration, water level, water flow, and suspended solid concentration in descending order. The plants and permeable dam in the ditch also played an important role in nitrogen removal.