三种湿地植物处理餐饮废水试验

Treatment of restaurant wastewater by three wetland plants

选择水芹菜(Oenanthe javanica)、空心菜(Ipomoea aquatica)、青菜(Brassca chinensis L)三种常见植物作为人工湿地植物,研究了它们的生长特性及对餐饮废水中主要污染物的净化能力。试验结果表明:三种植物均生长良好;当污水停留时间(HRT)为6天时,对废水中COD、TP、TN与浊度的去除率,水芹菜分别为80.03%、72.22%、79.47%和85.99%,空心菜分别为84.68%、94.56%、82.48%和87.42%,青菜分别为65.77%、89.89%6、4.46%和82.77%,最终出水指标基本达到了GB 18918—2002《城镇污水处理厂污染物排放标准》的要求。该处理方法对未接入城市污水管网的旅游区、度假区、风景区有一定的应用优势。

We choose three kinds of common plants Oenanthe javanica,Ipomoea aquatica,Brassca chinensis L as the constructed wetland plants,and study their growth characteristic and purification ability of the main pollutants in restaurant wastewater.The results show that three kinds of plants all grow well.When the water retention time（HRT） is six days,the removal rate of COD,TP,TN and turbidity in Oenanthe javanica wetland is 80.03%,72.22%,79.47% and 85.99%,respectively.In Ipomoea aquatica wetland,the removal rate of COD,TP,TN and turbidity is 84.68%,94.56%,82.48% and 87.42%,respectively.And in Brassca chinensis L wetland is 65.77%,89.89%,64.46% and 82.77%,respectively.The indicators of the final effluent basically reach the requirements of the discharge standard of pollutants for municipal wastewater treatment plant（GB 18918-2002）.The application of this technology has some advantages in tourist areas,resorts,scenic spots where without access to city sewer.