Microbial Electrochemical Technologies for Wastewater Treatment: Principles and Evolution from Microbial Fuel Cells to Bioelectrochemical-Based Constructed Wetlands
Microbial Electrochemical Technologies for Wastewater Treatment: Principles and Evolution from Microbial Fuel Cells to Bioelectrochemical-Based Constructed Wetlands
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DOI：
10.20944/preprints201807.0369.v1
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发表时间：
2018-07
期刊：
影响因子：
3.4
通讯作者：
Carlos A. Ramírez-Vargas;A. Prado;C. Arias;P. Carvalho;A. Estéve-Núñez;H. Brix
中科院分区：
文献类型：
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作者：
Carlos A. Ramírez-Vargas;A. Prado;C. Arias;P. Carvalho;A. Estéve-Núñez;H. Brix
微生物电化学技术（MET）依赖于电活性细菌的代谢活性的存在，利用固态电极氧化不同种类的化合物，从而合成化学物质，对污染基质进行生物修复，处理感兴趣的污染物，以及回收能量。考虑到这些可能性，自本世纪初以来，人们对使用电化学技术进行废水处理的兴趣越来越大，如果可能的话，还可以同时发电。在过去的几年里，人们对探索将MET与人工湿地结合的可能性越来越感兴趣，这为增强型湿地系统提供了一种新的选择，可以在低足迹的情况下保持高性能。基于这一兴趣，本文解释了MET的一般原理，以及控制电活性细菌与潜在固态电子受体之间相互作用的不同已知的细胞外电子转移机制。它还着眼于采用这些原则来开发同时进行废水处理和发电的MET装置，以及该技术面临的挑战。最后，介绍并讨论了将MET与人工湿地相结合的最新进展。
Microbial electrochemical technologies (MET) rely on the presence of the metabolic activity of electroactive bacteria for the use of solid-state electrodes for oxidizing different kinds of compound that can lead to the synthesis of chemicals, bioremediation of polluted matrices, the treatment of contaminants of interest, as well as the recovery of energy. Keeping these possibilities in mind, there has been growing interest in the use of electrochemical technologies for wastewater treatment, if possible with simultaneous power generation, since the beginning of the present century. In the last few years, there has been growing interest in exploring the possibility of merging MET with constructed wetlands offering a new option of an intensified wetland system that could maintain a high performance with a lower footprint. Based on that interest, this paper explains the general principles of MET, and the different known extracellular electron transfer mechanisms ruling the interaction between electroactive bacteria and potential solid-state electron acceptors. It also looks at the adoption of those principles for the development of MET set-ups for simultaneous wastewater treatment and power generation, and the challenges that the technology faces. Ultimately, the most recent developments in setups that merge MET with constructed wetlands are presented and discussed.