A large amount of chemical energy in wastewater is highly valuable in resource utilization, and nitrogen is one of the key nutrients and contaminants in diverse wastewater. Traditional wastewater treatment technologies focus on removing nitrogen from wastewater, which s not sustainable and consumes a lot of resources and energy. Microbial electrochemical technologies (METs) have been invested to transform conventional energy-intensive wastewater treatment into a resource recovery process for reclaiming valuable nitrogen products. Nevertheless, the engineering application of METs from different real wastewater is still in its infancy due to the complex characteristics of different waste streams. This review broadly concludes the present METs-assisted nitrogen recovery systems and the ammonium recovery performance of different wastewater streams. Additionally, the environmental impact and economic analysis of different METs and end products are presented to demonstrate their application potential. The results show that the microbial electrolysis cell (MEC) has better engineering application compared to microbial fuel cell (MFC), which could reduce the overall environmental burden and infrastructure costs. And coupling the MEC with stripping technology can be a preferable option for ammonia recovery.. Finally, present challenges and prospects in the field of METs-assisted nitrogen recovery are discussed, including scaling up bioreactors, enhancing strategies, and conducting life cycle assessment of the entire recovery process.

废水中含有大量的化学能，具有很高的资源利用价值，氮是多种废水中的关键营养物质和污染物之一。传统的废水处理技术侧重于去除废水中的氮，这是不可持续的，并且会消耗大量的资源和能源。已投资微生物电化学技术 (MET) 将传统的能源密集型废水处理转变为资源回收过程，以回收有价值的氮产品。尽管如此，来自不同领域的 MET 的工程应用由于不同废物流的复杂特性，真正的废水处理仍处于起步阶段。本综述大致总结了目前的 METs 辅助氮回收系统和不同废水流的铵回收性能。此外，还介绍了不同 MET 和最终产品的环境影响结果表明，与微生物燃料电池(MFC)，这可以减少整体环境负担和基础设施成本。将 MEC 与汽提技术相结合可能是氨回收的优选选择。整个恢复过程。