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模拟串联垂直流人工湿地去除重污染河水中氮的研究

DOI: 10.11654/jaes.2014.12.020, PP. 2420-2426

Keywords: 串流垂直流人工湿地,河水,,水力负荷,植物

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Abstract:

利用在温室内构建的串联垂直流人工湿地模拟装置净化北京市清河污染河水,研究2种水力负荷、3个串联级数、有无植物等对湿地除氮效果的影响.5个多月的运行结果表明:在进水总氮(TN)浓度平均12.36mg·L-1,氨氮浓度平均5.92mg·L-1时,TN去除率在水力负荷为0.2m3·m-2·d-1时明显高于0.4m3·m-2·d-1时;串联级数对氮去除有一定影响,1级柱与3级柱系统间存在显著差异(P0.05);植物显著影响除氮,有-无植物系统间存在显著差异(P<0.05).总体上,水力负荷为0.2m3·m-2·d-1时,有植物3级柱系统的TN、氨氮的去除率最高,其中氨氮去除率高达85.74%,出水平均浓度0.43mg·L-1,达地表水Ⅱ类水质标准.

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