Guo Yanli, Wei Xia, Zhang Shaohui
School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China.
School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China.
Bioresour Technol. 2020 Jun;305:123082. doi: 10.1016/j.biortech.2020.123082. Epub 2020 Feb 24.
A loop microbial fuel cell (MFC) system consisting of a denitrifying organics/sulfide removal MFC and a nitrification chamber was developed, and its performance at different feeding ratios of total organic carbon to sulfide (TOC/S) and dissolved oxygen (DO) levels of cathodic feeding were investigated. High feeding TOC/S ratio favored elemental sulfur production and anodic electron recovery. Introducing oxygen into the cathode enhanced nitrogen removal and electricity generation but hindered elemental sulfur production. At the optimal feeding TOC/S mass ratio of 4.69 and cathodic feeding DO of 4.2 mg/L, 100% of TOC, 100% of sulfide and 82.6 ± 0.9% of total nitrogen were removed, achieving a sulfur production percentage of 35.1 ± 4.4% and a coulombic efficiency of 53.0 ± 2.2%. Cathodic nitrogen removal was catalyzed by denitrifiers, nitrifiers and anammox bacteria. This work provided a novel approach for simultaneously removing organics, sulfide and ammonium coupled with electricity generation from wastewater.
开发了一种由反硝化有机物/硫化物去除微生物燃料电池（MFC）和硝化室组成的循环微生物燃料电池（MFC）系统，并研究了其在不同总有机碳与硫化物进料比（TOC/S）以及阴极进料溶解氧（DO）水平下的性能。高进料TOC/S比有利于元素硫的产生和阳极电子回收。向阴极引入氧气可增强氮去除和发电，但会阻碍元素硫的产生。在最佳进料TOC/S质量比为4.69且阴极进料DO为4.2 mg/L时，100%的TOC、100%的硫化物和82.6±0.9%的总氮被去除，元素硫产生率达到35.1±4.4%，库仑效率为53.0±2.2%。阴极氮去除由反硝化细菌、硝化细菌和厌氧氨氧化细菌催化。这项工作为同时去除废水中的有机物、硫化物和铵并耦合发电提供了一种新方法。
