通过浮床湿地和植被收割去除营养物来改善城市雨水径流质量。
Improving Urban Stormwater Runoff Quality by Nutrient Removal through Floating Treatment Wetlands and Vegetation Harvest.
机构信息
School of municipal and environmental engineering, Shandong Jianzhu University, Jinan, 250101, China.
Co-innovation center of Green Building, Jinan, 250101, China.
出版信息
Sci Rep. 2017 Aug 1;7(1):7000. doi: 10.1038/s41598-017-07439-7.
Two floating treatment wetlands (FTWs) in experimental tanks were compared in terms of their effectiveness on removing nutrients. The results showed that the FTWs were dominated by emergent wetland plants and were constructed to remove nutrients from simulated urban stormwater. Iris pseudacorus and Thalia dealbata wetland systems were effective in reducing the nutrient. T. dealbata FTWs showed higher nutrient removal performance than I. pseudacorus FTWs. Nitrogen (N) and phosphorous (P) removal rates in water by T. dealbata FTWs were 3.95 ± 0.19 and 0.15 ± 0.01 g/m/day, respectively. For I. pseudacorus FTWs, the TN and TP removal rates were 3.07 ± 0.15 and 0.14 ± 0.01 g/m/day, respectively. The maximum absolute growth rate for T. dealbata corresponded directly with the maximum mean nutrient removal efficiency during the 5th stage. At harvest, N and P uptak of T. dealbata was 23.354 ± 1.366 g and 1.489 ± 0.077 g per plant, respectively, approximate twice as high as by I. pseudacorus.
两个浮床处理湿地（FTWs）在实验水箱中进行了比较，以评估它们去除营养物质的效果。结果表明，FTWs 主要由湿地挺水植物组成，旨在去除模拟城市暴雨中的营养物质。香蒲和海菜花湿地系统在减少营养物质方面表现出色。海菜花 FTWs 的养分去除性能高于香蒲 FTWs。海菜花 FTWs 对水中氮（N）和磷（P）的去除率分别为 3.95 ± 0.19 和 0.15 ± 0.01 g/m/天。对于香蒲 FTWs，TN 和 TP 的去除率分别为 3.07 ± 0.15 和 0.14 ± 0.01 g/m/天。海菜花的最大绝对生长率与第 5 阶段的最大平均养分去除效率直接相关。在收获时，海菜花吸收的氮和磷分别为 23.354 ± 1.366 g 和 1.489 ± 0.077 g/株，大约是香蒲的两倍。
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