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; Hubei Key Laboratory of Fuel Cell, Wuhan University of Technology, Wuhan 430070, PR China.
Bioresour Technol. 2021 Feb;322:124535. doi: 10.1016/j.biortech.2020.124535. Epub 2020 Dec 16.
A denitrifying sulfide removal microbial fuel cell, incorporated with a capacitor and run in an alternate charging and discharging mode, was developed to in-situ utilize the produced electricity. The switching interval, external resistance distribution and temperature were used to adjust substrates conversion via regulating electrode potentials. The switching interval of 10 min favored the formation of sulfur and gaseous nitrogen. Adjusting the external resistances via the constant anode potential method was a feasible measure for regulating the cathode potential and promoting nitrate reduction, achieving a total nitrogen removal rate of 16.5 ± 0.8 g N/(m d) and a gaseous nitrogen formation percent of 32.2 ± 1.5%. 30 °C favored gaseous nitrogen formation while 10 °C and 40 °C benefited sulfur formation. In-situ utilization of the produced electricity shifted the microbial community structure. This work provided a novel approach to regulate the substrate conversion by in-situ utilizing the produced electricity.
一种反硝化脱硫微生物燃料电池，与电容器结合并在交替充电和放电模式下运行，旨在就地利用产生的电能。通过调节电极电位，利用开关间隔、外接电阻分布和温度来调节基质转化。10 分钟的开关间隔有利于硫和气态氮的形成。通过恒阳极电位法调节外接电阻是一种可行的调节阴极电位和促进硝酸盐还原的措施，总氮去除率达到 16.5±0.8 g N/（m d），气态氮形成率达到 32.2±1.5%。30°C 有利于气态氮的形成，而 10°C 和 40°C 有利于硫的形成。产生的电能的就地利用改变了微生物群落结构。这项工作提供了一种通过就地利用产生的电能来调节基质转化的新方法。
