| 不同气水比对两种人工湿地除污效果的影响 |
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| 引用本文： | 李静静,邹大为,张毓媛,安树青,冷欣.不同气水比对两种人工湿地除污效果的影响[J].湿地科学与管理,2017(3):50-55. |
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| 作者姓名： | 李静静 邹大为 张毓媛 安树青 冷欣 |
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| 作者单位： | 1. 南京大学生命科学学院,南京,210023;2. 南京大学生命科学学院, 南京 210023;南京大学常熟生态研究院, 常熟 215500 |
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| 基金项目： | 淮河下游重污染河道水质改善生态净化与水生态修复技术及示范(2014ZX07204-005)，清潩河(许昌段)环境流量调控与生态水系构建技术集成与示范(2015ZX07204-002-04-4) |
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| 摘 要： | 为比较不同气水比下各类型人工湿地的除污效果,选取火山石、炉渣和牡蛎壳作为人工湿地构建基质,研究两种人工湿地(表面流和潜流人工湿地)在不同气水比(0,2,4,6,8)下对污水的净化效果。结果表明:潜流型人工湿地对COD、NH_4~+-N及TP的去除率均高于表面流人工湿地;尤其是在COD的去除过程中,当气水比≥4时,潜流式湿地对污染物的去除效果显著高于表面流人工湿地。此外,适当曝气可显著提高人工湿地对COD、NH_4~+-N及TP的去除率,气水比为4时,表面流和潜流人工湿地对COD及TP的去除率显著高于气水比为0和2时的去除率。对NH_4~+-N而言,表面流和潜流人工湿地分别在气水比为8和6时达到最大去除率。气水比和人工湿地类型的交互作用对污染物的去除率影响不显著,在实际工程中可以忽略组合效应,致力于确定湿地类型及气水比各自对湿地除污效果的最优条件。
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| 关 键 词： | 人工湿地 表面流潜流 气水比 除污效果 |
Effects of Air-water Ratio on Pollutants Removal in Two Types of Constructed Wetland |
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| LI Jing-Jing,ZOU Da-Wei,ZHANG Yu-Yuan,AN Shu-Qing,LENG Xin.Effects of Air-water Ratio on Pollutants Removal in Two Types of Constructed Wetland[J].Wetland Science & Management,2017(3):50-55. |
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| Authors: | LI Jing-Jing ZOU Da-Wei ZHANG Yu-Yuan AN Shu-Qing LENG Xin |
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| Abstract: | To investigate the pollutant removal efficiencies of different types of constructed wetland under different air-water ratios, COD、NH4+-N and TP were measured under different air-water ratios(R=0、2、4、6、8), and three types of substrates of volcanic stone, slag and oyster shell. The results showed that for constructed wetlands with subsurface lfow the removal efficiency of COD、NH4+-N and TP was higher than that with surface lfow, especially the removal efficiency of COD at R=4 and higher. In addition, appropriate aeration can signiifcantly promote the removal efficiency of COD、NH4+-N and TP. The removal efficiency of COD and TP at R=4 was signiifcantly higher than the removal efficiency at R=0 and 2. As to NH4+-N, the best removal efficiency was at R=8 and R=6. No interaction was found between the types of constructed wetlands and air-water ratio. Results highlighted choosing the appropriate type of constructed wetland or selecting the suitable air-water ratio for decontamination of wetlands. |
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| Keywords: | Constructed wetlands Surface flow Subsurface flow Air-water ratio Pollutant removal efficiencies |
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