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首页> 外文会议>Second International Conference on Wetlands amp; Remediation, Sep 5-6, 2001, Burlington, Vermont >ATMOSPHERIC OXYGEN DIFFUSION RATES IN CONSTRUCTED WETLANDS
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ATMOSPHERIC OXYGEN DIFFUSION RATES IN CONSTRUCTED WETLANDS

机译：人工湿地的大气氧气扩散率

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摘要

Nitrogen removal efficiency in a constructed wetland is often limited by the amount of oxygen available in the system. Oxygen transfer to the constructed treatment wetlands is dominated by atmospheric oxygen diffusion. The atmospheric oxygen diffusion rates of both subsurface flow constructed wetlands and free water surface constructed wetlands were quantified in this study using lab-scale constructed wetlands with two input concentrations of ammonia, 50 mg/L and 10 mg/L. Higher amounts of oxygen diffused into the subsurface-flow constructed wetlands. In contrast, little oxygen actually diffused into the free water surface systems. Statistically, cattails had no significant effect on either atmospheric oxygen diffusion rates or ammonia removal efficiencies in both subsurface flow systems and free water surface systems.
机译：人工湿地中的脱氮效率通常受系统中可用氧气量的限制。氧气向人工处理湿地的转移主要受大气中氧气的扩散影响。在这项研究中，使用实验室规模的人工湿地（输入浓度分别为50 mg / L和10 mg / L的两种氨）对地下流动人工湿地和自由水表面人工湿地的大气氧气扩散速率进行了量化。大量氧气扩散到地下流动的人工湿地中。相反，实际上没有氧气扩散到自由水表面系统中。从统计学上讲，香蒲对地下流动系统和自由水表面系统中的大气氧扩散速率或氨去除效率均无显着影响。

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