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首页> 外文期刊>Chemical engineering journal >Effects of loading, resting period, temperature, porous media, vegetation and aeration on performance of pilot-scale vertical flow constructed wetlands
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Effects of loading, resting period, temperature, porous media, vegetation and aeration on performance of pilot-scale vertical flow constructed wetlands

机译：装载，休息期，温度，多孔介质，植被和通风对先导型垂直流动的湿地构建湿地的影响

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Ten pilot-scale, cylindrical, vertical flow constructed wetlands (area 0.57 m~2) were constructed and operated continuously for three years in parallel experiments, treating synthetic wastewater, simulating the first treatment stage of full-scale systems. The wetland units were planted with two plant species (i.e., common reeds and cattails), had different porous media material composition (i.e., carbonate, igneous, zeolite and bauxite) and three different total substrate thicknesses and gradations. Three loading/resting schedules were used. Water quality samples were collected at the inlet and the outlet of each unit, and were analyzed in the laboratory for the determination of various pollutants. The VFCW units were quite efficient in organic matter (BOD5 and COD) and nitrogen (TKN and NH4~+-N) removal, with mean removal efficiencies exceeding 78% and 58%, respectively. Mean phosphorus (TP and OP) removal was lower (37%). The units were found to provide significant pollutant removal under high organic loads, up to 200 g COD/m~2 d. The presence of reeds and aeration tubes was found to improve the performance, while plant species did not affect efficiency. The use of special materials, aiming at enhancing the adsorption of different constituents, did not improve the wetland efficiency, probably due to limited contact time between material and wastewater, and is not recommended.
机译：十个先导尺度，圆柱形，垂直流动构造的湿地（面积0.57m〜2）在并行实验中连续进行三年，处理合成废水，模拟满量程系统的第一个治疗阶段。湿地单位用两种植物物种（即常见的芦苇和香蒲）种植，具有不同的多孔介质材料组合物（即碳酸酯，碳酸沸石，沸石和铝土矿）和三种不同的总基板厚度和灰度。使用了三个装载/休息时间表。在每个单元的入口和出口处收集水质样品，并在实验室分析用于测定各种污染物。 VFCW单位在有机物质（BOD5和COD）和氮气（TKN和NH4〜+ -N）中具有相当有效，分别超过78％和58％的平均去除效率。切割的平均磷（TP和OP）去除较低（37％）。发现该单位在高有机载荷下提供显着的污染物去除，高达200g COD / m〜2 d。发现芦苇和曝气管的存在改善了性能，而植物物种则不会影响效率。使用特殊材料，旨在增强不同成分的吸附，并未提高湿地效率，可能是由于材料和废水之间的有限接触时间，并且不推荐。

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