The effect of external resistance on biofilm formation and internal resistance in Shewanella inoculated microbial fuel cells

RSC Advances ◽  
2016 ◽  
Vol 6 (24) ◽  
pp. 20317-20323 ◽  
Author(s):  
Ting Liu ◽  
Yang-yang Yu ◽  
Dongzhe Li ◽  
Hao Song ◽  
Xiaoli Yan ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Biofilm Formation ◽  
Shewanella Oneidensis ◽  
Internal Resistance ◽  
External Resistance

External resistance has a significant impact on the bioelectrochemical property and biofilm formation of Shewanella oneidensis MR-1 on MFC anodes.

scholarly journals The Influence of External Load on the Performance of Microbial Fuel Cells

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 612
Author(s):  
Szymon Potrykus ◽  
Luis Fernando León-Fernández ◽  
Janusz Nieznański ◽  
Dariusz Karkosiński ◽  
Francisco Jesus Fernandez-Morales
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
External Load ◽  
Population Distribution ◽  
Oxygen Demand ◽  
Internal Resistance ◽  
Pollutant Removal ◽  
External Resistance ◽  
Reverse Scan ◽  
Resistance Value

In this work, the effect of the external load on the current and power generation, as well as on the pollutant removal by microbial fuel cells (MFCs), has been studied by step-wise modifying the external load. The load changes included a direct scan, in which the external resistance was increased from 120 Ω to 3300 Ω, and a subsequent reverse scan, in which the external resistance was decreased back to 120 Ω. The reduction in the current, experienced when increasing the external resistance, was maintained even in the reverse scan when the external resistance was step-wise decreased. Regarding the power exerted, when the external resistance was increased below the value of the internal resistance, an enhancement in the power exerted was observed. However, when operating near the value of the internal resistance, a stable power exerted of about 1.6 µW was reached. These current and power responses can be explained by the change in population distribution, which shifts to a more fermentative than electrogenic culture, as was confirmed by the population analyses. Regarding the pollutant removal, the effluent chemical oxygen demand (COD) decreased when the external resistance increased up to the internal resistance value. However, the effluent COD increased when the external resistance was higher than the internal resistance. This behavior was maintained in the reverse scan, which confirmed the modification in the microbial population of the MFC.

Biofilm Formation Within Microbial Fuel Cells

2018 ◽  
pp. 231-242
Author(s):  
Ramya Veerubhotla ◽  
Jhansi L. Varanasi ◽  
Debabrata Das
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Biofilm Formation
Sign in / Sign up

Export Citation Format

Share Document