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首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >Long-term performance of an integrated constructed wetland for advanced treatment of mixed wastewater
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Long-term performance of an integrated constructed wetland for advanced treatment of mixed wastewater

机译：用于综合构造湿地的长期性能，用于混合废水的先进治疗

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The aim of this study was to investigate long-term performance of a full-scale integrated constructed wetland (CW) system for advanced treatment of sanitary and industrial mixed wastewater. The system consisted of a vertical subsurface flow (VSF) CW, a free water surface (FWS) CW, and a horizontal subsurface flow (HSF) CW in series. Results from six-year operation showed that the system resulted in average removal efficiencies of 70%, 70%, 34%, 52%, 45%, 74%, 21%, 43%, and 98% for COD, NH4-N, NO3-N, TN, TP, TSS, F-, Ni, and E. coli, respectively. Especially, NH4-N was effectively removed by the VSF CW. With relatively high hydraulic loading rates (18.0-43.6 cm d(-1)) and short hydraulic retention times (1.04-2.51 d), the removal efficiencies of the system were quite stable for most of the water quality parameters, while the removal efficiency of TN increased from 49% to 60% during the six years. The removal efficiencies of the system were generally stable with the change of seasons. This study demonstrates that the VSF + FWS + HSF CW system can be a valuable approach for advanced wastewater treatment to meet the more stringent discharge requirement. (C) 2016 Elsevier B.V. All rights reserved.
机译：本研究的目的是调查全面综合建造湿地（CW）系统的长期性能，用于卫生和工业混合废水的先进治疗。该系统由垂直地下流（VSF）CW，自由水表面（FWS）CW和串联的水平地下流（HSF）CW组成。六年运作的结果表明，该系统导致平均去除效率为70％，70％，34％，52％，45％，74％，21％，43％和98％用于COD，NH4-N， No3-N，TN，TP，TSS，F-，Ni和大肠杆菌。特别地，VSF CW有效地去除NH4-N。具有相对较高的液压装载速率（18.0-43.6cmd（-1））和短的液压保留时间（1.04-2.51d），系统的去除效率对于大多数水质参数而言非常稳定，而去除效率在六年中，TN从49％增加到60％。随着季节的变化，系统的去除效率通常是稳定的。本研究表明，VSF + FWS + HSF CW系统可以是高级废水处理的有价值的方法，以满足更严格的排放要求。 （c）2016年Elsevier B.v.保留所有权利。

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