Impact of anodophilic biofilm bioelectroactivity on the denitrification behaviour of air‐cathode microbial fuel cells

2021 ◽  
Author(s):  
Wenjuan Zhao ◽  
YiZhao Gao ◽  
Yongli Zhao ◽  
Xiaoya Deng ◽  
Jun Shao ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Air Cathode

Polyelectrolyte–single wall carbon nanotube composite as an effective cathode catalyst for air-cathode microbial fuel cells

2014 ◽  
Vol 70 (10) ◽  
pp. 1610-1616 ◽  
Author(s):  
Huanan Wu ◽  
Min Lu ◽  
Lin Guo ◽  
Leonard Guan Hong Bay ◽  
Zheng Zhang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Carbon Nanotube ◽  
Oxygen Reduction ◽  
Microbial Fuel Cells ◽  
Reduction Process ◽  
Air Cathode ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon ◽  
Cathode Catalysts ◽  
Metal Free

Polyelectrolyte–single wall carbon nanotube (SCNT) composites are prepared by a solution-based method and used as metal-free cathode catalysts for oxygen reduction reaction (ORR) in air-cathode microbial fuel cells (MFCs). In this study, two types of polyelectrolytes, polydiallyldimethylammonium chloride (PDDA) and poly[bis(2-chloroethyl)ether-alt-1,3-bis[3-(dimethylamino)propyl]urea] (PEPU) are applied to decorate the SCNTs and the resulting catalysts exhibit remarkable catalytic ability toward ORR in MFC applications. The enhanced catalytic ability could be attributed to the positively charged quaternary ammonium sites of polyelectrolytes, which increase the oxygen affinity of SCNTs and reduce activation energy in the oxygen reduction process. It is also found that PEPU–SCNT composite-based MFCs show efficient performance with maximum power density of 270.1 mW m−2, comparable to MFCs with the benchmark Pt/C catalyst (375.3 mW m−2), while PDDA–SCNT composite-based MFCs produce 188.9 mW m−2. These results indicate that PEPU–SCNT and PDDA–SCNT catalysts are promising candidates as metal-free cathode catalysts for ORR in MFCs and could facilitate MFC scaling up and commercialization.

Mitigation of the effect of catholyte contamination in microbial fuel cells using a wicking air cathode

2009 ◽  
Vol 24 (10) ◽  
pp. 3144-3147 ◽  
Author(s):  
Christian J. Sund ◽  
Michael S. Wong ◽  
James J. Sumner
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Air Cathode

Brewery wastewater treatment using air-cathode microbial fuel cells

2008 ◽  
Vol 78 (5) ◽  
pp. 873-880 ◽  
Author(s):  
Yujie Feng ◽  
Xin Wang ◽  
Bruce E. Logan ◽  
He Lee
Keyword(s):  
Wastewater Treatment ◽  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Brewery Wastewater ◽  
Air Cathode

Power generation by packed-bed air-cathode microbial fuel cells

2013 ◽  
Vol 142 ◽  
pp. 109-114 ◽  
Author(s):  
Xiaoyuan Zhang ◽  
Juan Shi ◽  
Peng Liang ◽  
Jincheng Wei ◽  
Xia Huang ◽  
...  
Keyword(s):  
Power Generation ◽  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Packed Bed ◽  
Air Cathode

High strength bioethanol wastewater inoculated with single‐strain or binary consortium feeding air‐cathode microbial fuel cells

2018 ◽  
Vol 38 (2) ◽  
pp. 380-386 ◽  
Author(s):  
Rodrigo J. Marassi ◽  
Marcos Igreja ◽  
Manzo Uchigasaki ◽  
Gilmar C. Silva
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
High Strength ◽  
Air Cathode ◽  
Single Strain

scholarly journals Rumen Inoculum Enhances Cathode Performance in Single-Chamber Air-Cathode Microbial Fuel Cells

Materials ◽  
2022 ◽  
Vol 15 (1) ◽  
pp. 379
Author(s):  
Ignacio T. Vargas ◽  
Natalia Tapia ◽  
John M. Regan
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Rumen Fluid ◽  
Oxygen Demand ◽  
Air Cathode ◽  
Single Chamber ◽  
Higher Power ◽  
Mixed Microbial Community ◽  
Current Production ◽  
Soluble Chemical Oxygen Demand

During the last decade, bioprospecting for electrochemically active bacteria has included the search for new sources of inoculum for microbial fuel cells (MFCs). However, concerning power and current production, a Geobacter-dominated mixed microbial community derived from a wastewater inoculum remains the standard. On the other hand, cathode performance is still one of the main limitations for MFCs, and the enrichment of a beneficial cathodic biofilm emerges as an alternative to increase its performance. Glucose-fed air-cathode reactors inoculated with a rumen-fluid enrichment and wastewater showed higher power densities and soluble chemical oxygen demand (sCOD) removal (Pmax = 824.5 mWm−2; ΔsCOD = 96.1%) than reactors inoculated only with wastewater (Pmax = 634.1 mWm−2; ΔsCOD = 91.7%). Identical anode but different cathode potentials suggest that differences in performance were due to the cathode. Pyrosequencing analysis showed no significant differences between the anodic community structures derived from both inocula but increased relative abundances of Azoarcus and Victivallis species in the cathodic rumen enrichment. Results suggest that this rarely used inoculum for single-chamber MFCs contributed to cathodic biofilm improvements with no anodic biofilm effects.

Effects of azide on electron transport of exoelectrogens in air-cathode microbial fuel cells

2014 ◽  
Vol 169 ◽  
pp. 265-270 ◽  
Author(s):  
Xiangtong Zhou ◽  
Youpeng Qu ◽  
Byung Hong Kim ◽  
Pamela Yengfung Choo ◽  
Jia Liu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Electron Transport ◽  
Microbial Fuel Cells ◽  
Air Cathode

A novel and high performance activated carbon air-cathode with decreased volume density and catalyst layer invasion for microbial fuel cells

RSC Advances ◽  
2014 ◽  
Vol 4 (80) ◽  
pp. 42577-42580 ◽  
Author(s):  
Yueyong Zhang ◽  
Xin Wang ◽  
Xiaojing Li ◽  
Ningshengjie Gao ◽  
Lili Wan ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Activated Carbon ◽  
Microbial Fuel Cells ◽  
High Performance ◽  
Catalyst Layer ◽  
Volume Density ◽  
Air Cathode
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