Water Environ Res. 2018 Feb 1;90(2):129-135. doi: 10.2175/106143017X14902968254728. Epub 2017 Jun 21.
In the present study two designs, vertical and horizontal systems, were used and two different plant species, Water Lettuce (Pistia stratiotes) and Reed plant (Phragmites karka), compared for their removal efficiency. The vertical system appeared to be more stable and efficient for almost all the parameters. The vertical system, planted with Water Lettuce, showed percentage removal efficiency for BOD, phosphate and chloride as 82, 95.4, and 51, respectively, whereas turbidity and total suspended solids removal efficiencies were almost the same. However, fecal coliform removal by the Water Lettuce was 98.8% for both designs (vertical and horizontal), showing the ability of the plant to uptake nutrients and release toxins for pathogen disinfection. It appears that the vertical system could be the better option, planted with Water Lettuce, or with both plants in a co-culture environment.
在本研究中，使用了垂直系统和水平系统两种设计，并比较了两种不同的植物物种，水蕹菜（Pistia stratiotes）和芦苇（Phragmites karka），以评估它们的去除效率。垂直系统对于几乎所有参数来说似乎更加稳定和高效。垂直系统种植水蕹菜，对 BOD、磷酸盐和氯化物的去除效率分别为 82%、95.4%和 51%，而浊度和总悬浮固体的去除效率几乎相同。然而，水蕹菜对粪大肠菌群的去除率在两种设计（垂直和水平）中均为 98.8%，表明该植物具有吸收养分和释放毒素以消毒病原体的能力。看来，垂直系统可能是更好的选择，可以种植水蕹菜，也可以在共培养环境中种植两种植物。
