School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok, 10150, Thailand.
Pilot Plant Development and Training Institute, King Mongkut's University of Technology Thonburi, Bangkok, 10150, Thailand.
Environ Sci Pollut Res Int. 2023 Sep;30(42):96163-96180. doi: 10.1007/s11356-023-29185-2. Epub 2023 Aug 11.
Constructed wetlands (CWs) have proven to be effective and environmentally friendly for removing pollutants, while microbial fuel cells (MFCs) offer the potential for electricity generation. Thus, this study evaluated the performance of three CW-MFC systems (zigzag, single-column, and triple-column continuous) for domestic wastewater treatment and electricity generation. Results showed that parallel connection of CW-MFCs significantly improved power generation compared to series connection. Additionally, using three copper wires to connect carbon fiber felt electrodes demonstrated superior pollutant capture capabilities compared to a single copper wire. During the 14-day testing period, the single-column system achieved the highest power density of 5.55 mW m, followed closely by the triple-column continuous system at 4.77 mW m. In contrast, the zigzag system exhibited a lower power density of 2.49 mW m. Interestingly, the implementation of facultative anaerobic conditions in the anode, along with the application of a plastic bag cover, facilitated the maintenance of anaerobic conditions in both the single-column and triple-column continuous systems. This resulted in increased power density and reduced internal resistance. In contrast, the zigzag system, with its larger surface area, aeration, and circulation, exhibited higher internal resistance and lower current dissipation. Despite its inferior electricity generation performance, the zigzag system demonstrated higher efficiency removal of chemical oxygen demand (COD), nitrate (NO), and phosphate (PO) than the single-column system. This can be attributed to the extended contact time, resulting in enhanced pollutant removal. Overall, the multi-column continuous system shows promise as a viable approach for simultaneous domestic wastewater treatment and electricity production, offering potential benefits for sustainable wastewater management.
人工湿地（CWs）已被证明在去除污染物方面是有效且环保的，而微生物燃料电池（MFCs）则具有发电的潜力。因此，本研究评估了三种 CW-MFC 系统（Z 字形、单柱和三柱连续）用于处理生活污水和发电的性能。结果表明，CW-MFC 的并联连接比串联连接显著提高了发电效率。此外，与使用单根铜丝相比，使用三根铜丝连接碳纤维毡电极表现出了更好的污染物捕获能力。在 14 天的测试期间，单柱系统实现了 5.55 mW m 的最高功率密度，紧随其后的是三柱连续系统的 4.77 mW m。相比之下，Z 字形系统的功率密度较低，为 2.49 mW m。有趣的是，在阳极中实施兼性厌氧条件，并应用塑料袋覆盖，有助于在单柱和三柱连续系统中维持厌氧条件。这导致了功率密度的增加和内阻的降低。相比之下，Z 字形系统由于其较大的表面积、曝气和循环，表现出较高的内阻和较低的电流损耗。尽管其发电性能较差，但 Z 字形系统对化学需氧量（COD）、硝酸盐（NO）和磷酸盐（PO）的去除效率高于单柱系统。这可以归因于延长的接触时间，从而增强了污染物的去除。总体而言，多柱连续系统作为一种同时处理生活污水和发电的可行方法具有潜力，为可持续的污水管理提供了潜在的益处。
