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首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >Solids distribution and hydraulic conductivity in multi-cell horizontal subsurface flow constructed wetlands
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Solids distribution and hydraulic conductivity in multi-cell horizontal subsurface flow constructed wetlands

机译：多细胞水平地下流动中的固体分布和液压导电构造湿地

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This study evaluated the accumulated solids spatial distribution and their relationship with hydraulic conductivity (K) in a multi-cell horizontal subsurface flow (HSSF) constructed wetland (CW). The system is located near the Caribbean Coast of Colombia where tropical conditions reign. After three years of operation, total suspended solids (TSS) and volatile suspended solids (VSS) accumulated within the interstitial spaces and those that adhered to the surface of the gravel were quantified. Samples were collected at six points and at two depths (0.1 and 0.35 m) within each of five cells of the CW. Similar quantifications were made three months after a washing process of the granular bed. The average values for the first samples collected were 3.129 kg m(-2) TSS and 35.5% VSS. The average values for the second samples collected were 0.224 kg m(-2) TSS and 42.7% VSS. K values were measured after the gravel washing process using the falling head method. K values registered above 400 m d(-1), which coincided with the low amount of accumulated TSS (<1 kg m(-2)). This assessment revealed an inverse relation between accumulated solids and hydraulic conductivity (R-2 = 0.76), indicating that the accumulation rate of solids was the primary factor causing clogging within the constructed wetland treatment cells. In order to evaluate the state of clogging in tropical constructed wetlands, a dimensionless number was proposed as an indicator of clogging severity. (C) 2017 Elsevier B.V. All rights reserved.
机译：该研究评估了多细胞水平地下流动（HSSF）构造的湿地（CW）中的累积固体空间分布及其与液压导电性（k）的关系。该系统位于哥伦比亚的加勒比海岸附近，热带条件统治。经过三年的操作，量化在间隙空间内积聚的总悬浮固体（TSS）和挥发性悬浮固体（VSS）和粘附在砾石表面的那些中。在CW的五个细胞中的每一个细胞中以六点和两个深度（0.1和0.35μm）收集样品。在颗粒状床的洗涤过程后三个月制备类似的量化。收集的第一个样品的平均值为3.129kg m（-2）TSS和35.5％VSS。收集的第二样品的平均值为0.224kg m（-2）TSS和42.7％VSS。使用下降头法在砾石洗涤过程之后测量k值。 K值登记在400 m d（-1）以上，这与较低量的累积Tss（<1kg m（-2））一致。该评估揭示了累积固体和液压导电性（R-2 = 0.76）之间的反向关系，表明固体的累积率是导致构造的湿地处理细胞内堵塞的主要因素。为了评估热带构造的湿地中堵塞的状态，提出了无量纲数量作为堵塞严重程度的指标。 （c）2017 Elsevier B.v.保留所有权利。

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