Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
Bioelectrochemistry. 2020 Aug;134:107535. doi: 10.1016/j.bioelechem.2020.107535. Epub 2020 Apr 15.
This study reports the results of the application of microbial fuel cells (MFC) in refinery wastewater (RW) treatment. In this research, the effect of hydraulic retention time (HRT), and scale-up on the performance of a novel expandable modular design of single-chamber MFC (SCMFC) has been investigated. In the first part of the paper, the effect of HRT on chemical oxygen demand (COD) removal and electricity generation was examined. The generated steady open-circuit voltage (OCV) was 785 mV at HRT 90 h, and the provided maximum power density (PD) was 113 mW/m at HRT 15 h. At HRT of 45 h, COD removal increased up to 87% via an increase in the HRT. In the second part, the scale-up of SCMFC was investigated by serial (SFC) or parallel (PFC) connecting the outlets and inlets of fluid flows. The average produced OCV was 760 mV in PFC mode, and average produced PD in PFC and SFC modes were 97 and 75.6 mW/m, respectively. COD removal in SFC and PFC modes were reported to be 89 and 42%, respectively. Compared to PFC mode, SFC mode was more efficient in terms of COD removal and coulombic efficiency. However, it produced lower PD compared to PFC mode. It is possible to control the quality and capacity of wastewater treatment by using combining the SFC and PFC mode connections in packages of MFCs.
本研究报告了微生物燃料电池（MFC）在炼油废水（RW）处理中的应用结果。在这项研究中，考察了水力停留时间（HRT）和放大效应对新型可扩展模块化单室 MFC（SCMFC）性能的影响。在论文的第一部分，考察了 HRT 对化学需氧量（COD）去除和发电的影响。在 HRT 为 90 h 时，产生的稳定开路电压（OCV）为 785 mV，在 HRT 为 15 h 时，提供的最大功率密度（PD）为 113 mW/m。在 HRT 为 45 h 时，COD 去除率通过增加 HRT 提高到 87%。在第二部分，通过串联（SFC）或并联（PFC）连接流体的进出口来研究 SCMFC 的放大。在 PFC 模式下，平均产生的 OCV 为 760 mV，在 PFC 和 SFC 模式下，平均产生的 PD 分别为 97 和 75.6 mW/m。在 SFC 和 PFC 模式下，COD 去除率分别为 89%和 42%。与 PFC 模式相比，SFC 模式在 COD 去除率和库仑效率方面更有效。然而，与 PFC 模式相比，它产生的 PD 较低。通过在 MFC 套件中结合 SFC 和 PFC 模式连接，可以控制废水处理的质量和容量。
