Koomson Desmond Ato, Huang Jingyu, Li Guang, Miwornunyuie Nicholas, Ewusi-Mensah David, Darkwah Williams Kweku, Opoku Prince Atta
Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environmental Engineering, Hohai University, No. 1 Xikang Road, Nanjing 210098, China.
Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun 130118, China.
Membranes (Basel). 2021 Aug 27;11(9):661. doi: 10.3390/membranes11090661.
The recirculatory microbial desalination cell-microbial electrolysis cell (MDC-MEC) coupled system is a novel technology that generates power, treats wastewater, and supports desalination through eco-friendly processes. This study focuses on the simultaneous efficient removal of Fe and Pb in the MEC and ammonium ions in the MDC. It also evaluates the performances of dual-chambered MEC (DCMEC) and single-chambered MEC (SCMEC), coupled with MDC with Ferricyanide as catholyte (MDCF) in heavy metals (Pb and Fe) removal, in addition to the production of voltage, current, and power within a 48-h cycle. The SCMEC has a higher Pb (74.61%) and Fe (85.05%) removal efficiency during the 48-h cycle than the DCMEC due to the simultaneous use of microbial biosorption and the cathodic reduction potential. The DCMEC had a higher current density of 753.62 mAm than that of SCMEC, i.e., 463.77 mAm, which influences higher desalination in the MDCF than in the SCMEC within the 48-h cycle. The MDCF produces a higher voltage (627 mV) than Control 1, MDC (505 mV), as a power source to the two MECs. Stable electrolytes' pH and conductivities provide a conducive operation of the coupled system. This study lays a solid background for the type of MDC-MEC coupled systems needed for industrial scale-up.
循环微生物脱盐电池-微生物电解池（MDC-MEC）耦合系统是一种通过环保工艺发电、处理废水并支持脱盐的新技术。本研究着重于在MEC中同时高效去除铁和铅以及在MDC中去除铵离子。此外，除了评估在48小时周期内双室MEC（DCMEC）和单室MEC（SCMEC）与以铁氰化物为阴极电解液的MDC（MDCF）耦合在重金属（铅和铁）去除方面的性能外，还评估了它们产生电压、电流和功率的情况。由于同时利用了微生物生物吸附和阴极还原电位，SCMEC在48小时周期内对铅（74.61%）和铁（85.05%）的去除效率高于DCMEC。DCMEC的电流密度为753.62 mAm，高于SCMEC的463.77 mAm，这使得在48小时周期内MDCF中的脱盐效果比SCMEC中的更好。MDCF产生的电压（627 mV）高于对照1（MDC，505 mV），可作为两个MEC的电源。稳定的电解质pH值和电导率为耦合系统的运行提供了有利条件。本研究为工业规模放大所需的MDC-MEC耦合系统类型奠定了坚实基础。
