School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, PR China.
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China.
Bioresour Technol. 2024 Oct;410:131296. doi: 10.1016/j.biortech.2024.131296. Epub 2024 Aug 15.
The insufficient abundance of electron acceptors for ammonia during electron transfer in constructed wetlands (CWs) results in low nitrification rates. This study developed a green, low-carbon CWs enhanced by a bio-electrochemical systems (BESs-CWs) to achieve efficient ammonia (NH-N) removal. Electrode enhancement significantly promoted NH-N removal. Compared with traditional CWs, the average removal efficiency of NH-N in the BESs-CWs increased from 62.9 % to 90.6 %. The intermittent voltage driven by the photovoltaic power system caused minimal plant stress. However, electrode enhancement significantly affected microbial communities involved in short-path nitrification and denitrification within the biofilm. Specifically, the removal rate of NH-N by BESs-CWs under electrode enhancement was increased by 27.7 % compared to traditional CWs, enhancing the electron output of NH-N in the BESs-CWs. This system provides a method of ammonia nitration for CWs under poor electron acceptor conditions.
人工湿地 (CWs) 中电子传递过程中氨的电子受体不足会导致硝化速率低。本研究开发了一种绿色、低碳的 CWs 增强型生物电化学系统 (BESs-CWs)，以实现高效氨 (NH-N) 去除。电极增强显著促进了 NH-N 的去除。与传统 CWs 相比，BESs-CWs 中 NH-N 的平均去除效率从 62.9%提高到 90.6%。由光伏电源系统间歇性驱动的电压对植物造成的压力最小。然而，电极增强显著影响了生物膜内短程硝化和反硝化过程中涉及的微生物群落。具体而言，与传统 CWs 相比，电极增强下 BESs-CWs 中 NH-N 的去除率提高了 27.7%，增强了 BESs-CWs 中 NH-N 的电子输出。该系统为电子受体条件差的 CWs 提供了一种氨硝化方法。
