人工湿地在污水处理厂尾水深度处理领域的应用研究

Research on Application of Constructed Wetland in Advanced Treatment Field of Tail Water in Sewage Treatment Plant

该研究以“潜流人工湿地+表流人工湿地组合工艺”对某高寒、高海拔地区污水处理厂尾水进行了深度净化处理,通过对人工湿地设计参数、填料选择以及植物搭配进行优化,在湿地进水主要水质指标(CODCr、NH3-N、TN、TP等)满足GB18918—2002《城镇污水处理厂污染物排放标准》中一级A标准的前提下,实现了将湿地出水中CODCr、NH3-N两项考核指标质量浓度分别控制在30 mg/L、1.5 mg/L以下的设计需求,有效满足了GB 3838—2002《地表水环境质量标准》中Ⅳ类水的相关要求,具有良好的环境效益和生态与景观效益。

The complex process of "subsurface flow conducted wetland and surface flow conducted wetland " were applied to advanced treat the tail water of sewage treatment plant which was in the alpine and high altitude areas.Based on the optimization of design parameters, filler selection(recycled filler) and plant mix of constructed wetlands, the upstream water(CODCr、NH3-N、TN、TP concerned) meeting the first level A standard of GB 18918-2002 Discharge standard of pollutants for municipal wastewater treatment plant),design requirements were realized when both the quality concentrations of CODCrand NH3-N in wetland effluent had been controlled below 30 mg/L and 1.5 mg/L respectively and met the water quality of surface water Class IV standard of GB 3838 -2002 Environmental quality standards for surface water. It has significant environmental ecological and landscape benefits.