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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Influence of hydraulic retention time and plant species on performance of mesocosm subsurface constructed wetlands during municipal wastewater treatment in super-arid areas
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Influence of hydraulic retention time and plant species on performance of mesocosm subsurface constructed wetlands during municipal wastewater treatment in super-arid areas

机译：超级干旱区水力停留时间和植物种类对中尺度地下人工湿地性能的影响

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摘要

A constructed wetland (CW) in arid areas requires special knowledge given the particular climatic conditions. Among other aspects, the Hydraulic Retention Time (HRT) and plant species may be two important design parameters in hyper- and super-arid areas. Therefore, the study aimed to evaluate the influence of both variables in the application of CW in super-arid areas. Two HRT, 3.5 d and 7 d, and plant species classified by their origin: (a) native, Festuca Orthopylla, Cortaderia atacamensis and Schoenoplectus americanus, and (b) foreign, Cyperus papyrus, were evaluated in four Mesocosm Constructed Wetlands (MCW) operated in a super-arid area. The results showed that the HRT significantly increased ( < 0.05) in more than 10% the removal efficiency of nitrogen and phosphorus forms (TN, NH4+-N, TP, PO4-3-P). These results were the same for the two groups of plants assessed. Moreover, Cyperus papyrus significantly increased ( < 0.05) above 30% the removal efficiency, but only for nitrogen and phosphorus forms. MCW with this plant species showed a water loss above 25% and significantly increased ( < 0.05) the Electrical Conductivity (EC) of effluents. MCW planted with Schoenoplectus americanus showed water losses of around 25% for the both HRT evaluated, and its influence was not significant ( > 0.05) on the EC of the effluents. These results suggest that Schoenoplectus americanus would be an ideal candidate species for use in CW with subsurface flow in super-arid areas, with HRT varying between 3.5 d and 7 d.
机译：在特定气候条件下，干旱地区的人工湿地（CW）需要特殊知识。在其他方面，水力停留时间（HRT）和植物种类可能是高干旱和超干旱地区的两个重要设计参数。因此，本研究旨在评估这两个变量对超干旱地区连续波应用的影响。在四个中观世界人工湿地（MCW）中评估了两种HRT，分别为3.5 d和7 d，以及按其来源分类的植物物种：（a）本地Festuca Orthopylla，Cataderia atacamensis和Schoenoplectus americanus，以及（b）外来莎草纸莎草。在超级干旱地区经营结果表明，在去除氮和磷形式（TN，NH4 + -N，TP，PO4-3-P）的效率超过10％时，HRT显着提高（<0.05）。对于评估的两组植物，这些结果是相同的。此外，莎草纸莎草纸的去除效率在30％以上时显着增加（<0.05），但仅对于氮和磷形式有效。使用该植物物种的MCW表现出25％以上的水分流失，并且显着提高了（<0.05）废水的电导率（EC）。评估后的两种HRT种植的美利坚植物的MCW失水量约为25％，并且对废水的EC影响不显着（> 0.05）。这些结果表明，美国的Schoenoplectus将是在超干旱地区地下流中连续水使用的理想候选物种，HRT在3.5 d和7 d之间变化。

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