GEMMA - Environmental Engineering and Microbiology Research Group, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya·BarcelonaTech, c/ Jordi Girona 1-3, Building D1, E-08034, Barcelona, Spain; Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Gent, Belgium.
GEMMA - Environmental Engineering and Microbiology Research Group, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya·BarcelonaTech, c/ Jordi Girona 1-3, Building D1, E-08034, Barcelona, Spain.
Chemosphere. 2021 May;271:129593. doi: 10.1016/j.chemosphere.2021.129593. Epub 2021 Jan 8.
The removal of organic micropollutants (OMPs) has been investigated in constructed wetlands (CWs) operated as bioelectrochemical systems (BES). The operation of CWs as BES (CW-BES), either in the form of microbial fuel cells (MFC) or microbial electrolysis cells (MEC), has only been investigated in recent years. The presented experiment used CW meso-scale systems applying a realistic horizontal flow regime and continuous feeding of real urban wastewater spiked with four OMPs (pharmaceuticals), namely carbamazepine (CBZ), diclofenac (DCF), ibuprofen (IBU) and naproxen (NPX). The study evaluated the removal efficiency of conventional CW systems (CW-control) as well as CW systems operated as closed-circuit MFCs (CW-MFCs) and MECs (CW-MECs). Although a few positive trends were identified for the CW-BES compared to the CW-control (higher average CBZ, DCF and NPX removal by 10-17% in CW-MEC and 5% in CW-MFC), these proved to be not statistically significantly different. Mesoscale experiments with real wastewater could thus not confirm earlier positive effects of CW-BES found under strictly controlled laboratory conditions with synthetic wastewaters.
人工湿地（CWs）作为生物电化学系统（BES）已被用于去除有机微量污染物（OMPs）。近年来，CWs 作为 BES（CW-BES）的运行方式，无论是以微生物燃料电池（MFC）还是微生物电解池（MEC）的形式，都得到了研究。本实验采用中观尺度 CW 系统，采用实际的水平流模式和连续进料真实城市污水，并添加了四种 OMPs（药物），即卡马西平（CBZ）、双氯芬酸（DCF）、布洛芬（IBU）和萘普生（NPX）。研究评估了传统 CW 系统（CW-control）以及作为闭路 MFC（CW-MFCs）和 MEC（CW-MECs）运行的 CW 系统的去除效率。尽管与 CW-control 相比，CW-BES 显示出一些积极的趋势（CW-MEC 中 CBZ、DCF 和 NPX 的平均去除率提高了 10-17%，CW-MFC 提高了 5%），但这些差异并不具有统计学意义。因此，中观尺度实验用真实废水不能证实早期在严格控制的实验室条件下用合成废水发现的 CW-BES 的积极效果。
