Abstract:

The constructed wetland-microbial fuel cell coupling system is a novel bioelectrochemical process that combines constructed wetland and microbial fuel cell. In this system, constructed wetlands provide the required redox gradients and chemical energy for microbial fuel cells, while microbial fuel cells can improve the processing efficiency of constructed wetlands and recover energy through generating electricity. At present, the research focuses on water treatment. In this paper, combined with the development of constructed wetland-microbial fuel cell coupling system in recent years, the research status of the constructed wetland-microbial fuel cell coupling system is reviewed from two aspects: system construction and system performance. The factors that matter much include the components of the system (wetland plants, electrode materials, matrix materials and microorganisms) and system operating parameters (organic load and wastewater composition, hydraulic retention time, dissolved oxygen and water inflow). Finally, this paper puts forward the main problems that need to be solved in the constructed wetland-microbial fuel cell coupling system. The problems include improving the coulomb efficiency of the system, further reducing the construction cost, improving the comprehensive performance of system decontamination and electricity production, and finally realizing the industrialization of the system.

Key words: microbial fuel cell, constructed wetland, electrochemistry, recovery, water treatment, electricity production

摘要：

人工湿地-微生物燃料电池耦合系统是一种新型生物电化学工艺。在该系统中，人工湿地为微生物燃料电池提供所需的氧化还原梯度和化学能，而微生物燃料电池可以提高人工湿地的处理效能并通过产电的方式回收能源，目前研究主要集中在水处理方面。本文结合近几年人工湿地-微生物燃料电池耦合系统的发展，从系统构建和系统性能的影响因素两个方面综述了人工湿地-微生物燃料电池耦合系统的研究现状，其中影响因素包括系统的组成要素（湿地植物、电极材料、基质材料和微生物）和系统运行参数（有机负荷和废水成分、水力停留时间、溶解氧和进水方式）两个方面。最后提出了人工湿地-微生物燃料电池耦合系统需要解决的主要问题：提高系统的库仑效率，进一步降低构建成本，提高系统去污及产电的综合性能，使该系统最终实现产业化。

关键词: 微生物燃料电池, 人工湿地, 电化学, 回收, 水处理, 产电