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05 3 月, 2018
利用人工湿地净化污水
人工湿地利用自然过程来处理污染水。在世界各地的许多情况下，雨水、市政和工业废水排入运河和河流；导致水体因过量的营养物质和其他有害污染物而污染。
人工湿地（也称为滞留盆地）是浅而平坦的水体，在降雨时会充满和排水。传统上，它们包含精心挑选和放置的植物。这些植物对于成功去除营养物至关重要，因为它们就像筛子一样过滤和捕获沉积物和细颗粒。它们还减慢了废水的流速。在湿地中较长的停留时间有助于养分的吸收。
Phoslock Environmental Technologies (PET) 正在建设人工湿地来处理中国大型运河的废水。运河水被引入人工湿地，以显着降低营养物质（磷和氮）的浓度，并最大限度地减少排回运河网络的沉积物负荷。这一过程有效地为运河水提供了天然的化学和物理筛分。鉴于中国运河的营养物质含量很高，PET 正在湿地中添加 Phoslock 和改性沸石，以显着降低水中的磷和氮含量。
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