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首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >Effects of plant species in a horizontal subsurface flow constructed wetland - phytoremediation of treated urban wastewater with Cyperus alternifolius L. and Typha latifolia L. in the West of Sicily (Italy)
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Effects of plant species in a horizontal subsurface flow constructed wetland - phytoremediation of treated urban wastewater with Cyperus alternifolius L. and Typha latifolia L. in the West of Sicily (Italy)

机译：水平的地下流动人工湿地中植物物种的影响-西西里岛西（意大利）的莎草（Cyperus alternifolius L.）和香蒲（Typha latifolia L.）对城市污水处理后的植物进行植物修复

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摘要

Plant species carry out a series of important biological, chemical and physical processes within a constructed wetland wastewater treatment system and make a significant contribution to wastewater purification. This paper compares two emergent macrophy tes - Cyperus alternifolius L and Typha latifolia L - planted separately in a pilot horizontal subsurface flow system for the phytoremediation of treated urban wastewater in the West of Sicily (Italy). The total surface area of the three units within the pilot system was 99 m2. Six subunits were planted with two species and three subunits were left unplanted as the control. The main aim of the study was to demonstrate that, under identical hydraulic and design conditions, not only the use but also the choice of plant species significantly influences wastewater treatment processes with regard to all chemical, physical and microbiological parameters. The reedmace colonized a larger surface area and produced significantly higher yields of aboveground (3221 g m~2/year) and belowground (4071 gm~2 /year) biomass than the umbrella sedge. Nitrogen content was also found on average to be higher in the reedmace-based treatments (40.6 g m~2/year for aboveground and 62.7 g m~2/year for below-ground parts). A good level of BOD5 removal (72.4% for reedmace and 64.8% for umbrella sedge-based treatments) was obtained. Escherichia coli removal efficiency did not exceed 89.5%.
机译：植物物种在人工湿地废水处理系统中进行了一系列重要的生物，化学和物理过程，为废水净化做出了重要贡献。本文比较了分别种植在中试水平地下流系统中的两种新兴大型植物-香附子L和香蒲L，用于植物修复西西里岛（意大利）西部的城市废水。中试系统中三个单元的总表面积为99平方米。种植了具有两个物种的六个亚基，并保留了三个亚基作为对照。这项研究的主要目的是证明，在相同的水力和设计条件下，不仅使用植物，而且选择植物物种都会在所有化学，物理和微生物参数方面显着影响废水处理过程。与伞状莎草相比，芦苇群落的表面积更大，地上生物量（3221 g m〜2 /年）和地下生物量（4071 gm〜2 /年）的产量明显更高。在基于雷德米斯的处理中，平均氮含量也更高（地上部分为40.6 g m〜2 /年，地下部分为62.7 g m〜2 /年）。获得了良好的BOD5去除水平（浮渣的去除率为72.4％，伞状莎草的处理为64.8％）。大肠杆菌去除效率不超过89.5％。

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