Department of Environmental Engineering, University of Baghdad, Baghdad, Iraq.
Department of Environmental Engineering, University of Baghdad, Baghdad, Iraq.
J Environ Manage. 2024 Oct;369:122353. doi: 10.1016/j.jenvman.2024.122353. Epub 2024 Sep 1.
Several previous studies concerned of microbial fuel cells integrated into constructed wetlands, nevertheless, their application as a convenient treatment for wastewater is still developing. In this experimental investigation, five CW-MFC systems were similarly designed, setup, and operated in a batch mode for two subsequent cycles. Each cycle lasted for 10 days to evaluate the performance of CW-MFC system for the remediation of real leather tannery wastewater (LTW). Four CW-MFCs were planted, each with different type of vegetation including Conocarpus, Arundo donax, Canna lily, and Cyperus papyrus in CW1-MFC, CW2-MFC, CW3-MFC, and CW4-MFC, respectively. The fifth CW5-MFC was maintained unplanted and considered as the control system. The performance of each CW-MFCs systems was evaluated mainly based on the removal of organic content (COD), total dissolved solid (TDS) elimination, and power generation. The results demonstrated that the four types of plants maintained healthy and no sign of wilting was observed during the 20 days of monitoring. For the first cycle of batch operation, maximum removal efficiencies of COD were 99.8%, 99.5%, 99.7%, 99.6% and 99.5% with power outputs of 10,502.8, 10,254.6, 9956.4, 10,029.6, and 9888.0 mW/m, while, maximum TDS elimination were 46.7%, 39.7%, 60.8%, 55.5%, and 13.8% observed in CW1-MFC, CW2-MFC, CW3-MFC, CW4-MFC, and CW5-MFC, respectively. Very comparable results were observed in the second operation cycle. Results of phototoxicity test indicated that the germination of Hordeum vulgare and Triticum aestivum were 100% watered with treated effluent compared to 90% accomplished with tap water as the control solution for both types of seeds.
先前已有几项研究涉及到微生物燃料电池与人工湿地的集成，但它们作为一种方便的废水处理方法仍在发展中。在这项实验研究中，五个 CW-MFC 系统以类似的方式设计、设置并在批处理模式下运行，共进行了两个后续周期。每个周期持续 10 天，以评估 CW-MFC 系统对真皮革制革废水（LTW）修复的性能。四个 CW-MFC 系统中种植了不同类型的植被，包括 CW1-MFC、CW2-MFC、CW3-MFC 和 CW4-MFC 中的麻疯树、芦竹、美人蕉和香蒲，而第五个 CW5-MFC 则保持未种植状态，并作为对照系统。主要根据有机物质去除（COD）、总溶解固体（TDS）消除和发电情况来评估每个 CW-MFC 系统的性能。结果表明，四种植物在 20 天的监测过程中保持健康，没有出现萎蔫迹象。在批处理运行的第一个周期中，COD 的最大去除效率分别为 99.8%、99.5%、99.7%、99.6%和 99.5%，相应的功率输出为 10,502.8、10,254.6、9956.4、10,029.6 和 9888.0 mW/m，而在 CW1-MFC、CW2-MFC、CW3-MFC、CW4-MFC 和 CW5-MFC 中，TDS 的最大去除率分别为 46.7%、39.7%、60.8%、55.5%和 13.8%。在第二个操作周期中观察到非常相似的结果。光毒性测试结果表明，与用自来水作为对照溶液处理的 90%相比，用处理后的废水浇灌大麦和小麦的发芽率均为 100%。
