Optimization of performance assessment and design characteristics in constructed wetlands for the removal of organic matter
Optimization of performance assessment and design characteristics in constructed wetlands for the removal of organic matter
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DOI：
10.1016/j.chemosphere.2010.08.010
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发表时间：
2010-10-01
期刊：
影响因子：
8.8
通讯作者：
Becares, Eloy
中科院分区：
文献类型：
--
作者：
Hijosa-Valsero, Maria;Sidrach-Cardona, Ricardo;Becares, Eloy
比较了几种常用的人工湿地(ON)构型[常规和改进的自由水(FW)流、表面流(FW)、常规水平潜流(SSF)和无土浮游植物(FM)]在相同气候和废水条件下对城市污水中有机污染物[COD、过滤COD(FCOD)、BOD和总悬浮固体(TSS)]的去除效果。用三种方法计算了去除效果：出水浓度、面积去除负荷和质量去除。根据不同的方法，结果会有很大的不同，这表明表示CW效率的方式应该仔细考虑。在夏季，所有CW配置的出水BOD浓度均低于25 mg L(-1)，只有FW-CW出水从池底排出，即使在冬季和高有机负荷条件下也能保持较低的BOD出水浓度。在这种CW中，植物的存在有利于污染物的去除。SSF-CWS对COD的去除效果最好。调频系统可以像一些砾石床水煤浆一样高效。香椿比芦荟的效果更好，至少在系统运行初期是这样。(C)2010爱思唯尔有限公司。保留所有权利。
Some of the most used constructed wetland (ON) configurations [conventional and modified free-water (FW) flow, surface flow, conventional horizontal subsurface flow (SSF) and soilless systems with floating macrophytes (FM)] were assessed in order to compare their efficiencies for the removal of organic pollutants [COD, filtered COD (FCOD), BOD and total suspended solids (TSS)] from urban sewage under the same climatic and wastewater conditions. The removal performance was calculated using three approaches: effluent concentrations, areal removed loads and mass removal. Results were very different depending on the approach, which indicates that the way to present CW efficiency should be considered carefully. All CW-configurations obtained BOD effluent concentrations below 25 mg L(-1) in summer, with a FW-CW with effluent leaving through the bottom of the tank being the only one maintaining low BOD effluent concentrations even in winter and under high organic loading conditions. In this kind of CW, the presence of plants favoured pollutant removal. SSF-CWs were the most efficient for the removal of COD. FM systems can be as efficient as some gravel bed CWs. Typha angustifolia worked better than Phragmites australis, at least when the systems were at the beginning of their operation period. (C) 2010 Elsevier Ltd. All rights reserved.