复合垂直流人工湿地净化污水厂二级出水的研究
China Water & Wastewater(2009)
Abstract
在间歇运行条件下,采用复合垂直流人工湿地净化污水处理厂二级出水,考察了其净化效果及影响因素。结果表明,该系统能够有效降低污水厂二级出水中的氮和磷,适用于城市污水的深度处理。在0.4 m3/(m2.d)的低水力负荷条件下,系统对COD、氨氮、总氮和PO34--P的去除率分别为87.4%、82.15%、60.32%和30.15%;当排空时间为2 h时,系统的处理效果最好,对氨氮、总氮、PO34--P的去除率分别为84.44%、65.46%和40.33%。
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Key words
integrated vertical-flow constructed wetland,secondary effluent from WWTP,hydraulic load,idle time
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