曝气辅助上向流人工湿地的除污效能研究

人工湿地系统具有投资运行费用低、设备少、管理简单、处理效果稳定、便于就地回用等特点。在上向流人工湿地的基础上增加曝气装置,通过厌氧和好氧处理的结合,推动了系统对COD的去除作用以及氨氮的硝化作用。结果表明,在进水COD为326 mg/L、NH4＋-N为32 mg/L的条件下,其出水平均浓度分别为20 mg/L、4 mg/L,达到了GB18918-2002的一级A标准。沿人工湿地床层分布的氧化还原电位趋势线表明由附加曝气所产生的厌氧区和好氧区之间有明显的差异。

Study on Pollutants Removal Efficiency of Upflow Constructed Wetland with Aeration

Construted wetland system has many characteristic,such as low-cost,less equipments,stable management and easy to reuse etc.an aeration system was added based on the upflow construted wetland,boosted the COD removal and nitrification by the combination of anaerobic and aerobic processes.The result shows that when the influent concentration of COD,NH＋4-N are 326 mg/L,32 mg/L respectively,their average effluent concentrations are 20 mg/L and 4 mg/L,which achieve the discharge requirements of I-A criteria specified in the GB 18918-2002.The ORP profile along the wetland bed showed clear distinguishes between the anaerobic and aerobic regions in the wetland with supplementary aeration.