Three-dimensional electrodes enhance electricity generation and nitrogen removal of microbial fuel cells

2020 ◽  
Vol 43 (12) ◽  
pp. 2165-2174
Author(s):  
Jun Dong ◽  
Yue Wu ◽  
Chengye Wang ◽  
Haojie Lu ◽  
Yan Li
Keyword(s):  
Fuel Cells ◽  
Nitrogen Removal ◽  
Microbial Fuel Cells ◽  
Electricity Generation ◽  
Three Dimensional

Three-dimensional macroporous CNT–SnO2 composite monolith for electricity generation and energy storage in microbial fuel cells

RSC Advances ◽  
2016 ◽  
Vol 6 (64) ◽  
pp. 59610-59618 ◽  
Author(s):  
Tigang Duan ◽  
Ye Chen ◽  
Qing Wen ◽  
Jinling Yin ◽  
Yuyang Wang
Keyword(s):  
Fuel Cells ◽  
Energy Storage ◽  
Microbial Fuel Cells ◽  
Electricity Generation ◽  
Three Dimensional

A 3D macroporous CNT–SnO2 composite as the anode in microbial fuel cells achieves both good electricity generation and energy storage.

scholarly journals Development of Electroactive and Anaerobic Ammonium-Oxidizing (Anammox) Biofilms from Digestate in Microbial Fuel Cells

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Enea Gino Di Domenico ◽  
Gianluca Petroni ◽  
Daniele Mancini ◽  
Alberto Geri ◽  
Luca Di Palma ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Nitrogen Removal ◽  
Microbial Fuel Cells ◽  
Energy Recovery ◽  
Electricity Generation ◽  
Geobacter Sulfurreducens ◽  
Graphite Anode ◽  
Anammox Bacteria ◽  
Ammonium Oxidation ◽  
Anodic Chamber

Microbial Fuel cells (MFCs) have been proposed for nutrient removal and energy recovery from different wastes. In this study the anaerobic digestate was used to feed H-type MFC reactors, one with a graphite anode preconditioned withGeobacter sulfurreducensand the other with an unconditioned graphite anode. The data demonstrate that the digestate acts as a carbon source, and even in the absence of anode preconditioning, electroactive bacteria colonise the anodic chamber, producing a maximum power density of 172.2 mW/m2. The carbon content was also reduced by up to 60%, while anaerobic ammonium oxidation (anammox) bacteria, which were found in the anodic compartment of the reactors, contributed to nitrogen removal from the digestate. Overall, these results demonstrate that MFCs can be used to recover anammox bacteria from natural sources, and it may represent a promising bioremediation unit in anaerobic digestor plants for the simultaneous nitrogen removal and electricity generation using digestate as substrate.

Loading rate and external resistance control the electricity generation of microbial fuel cells with different three-dimensional anodes

2008 ◽  
Vol 99 (18) ◽  
pp. 8895-8902 ◽  
Author(s):  
Peter Aelterman ◽  
Mathias Versichele ◽  
Massimo Marzorati ◽  
Nico Boon ◽  
Willy Verstraete
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Electricity Generation ◽  
Loading Rate ◽  
Three Dimensional ◽  
External Resistance

scholarly journals Modelling Miniature Microbial Fuel Cells with Three-dimensional Anodes

2022 ◽  
Vol 334 ◽  
pp. 08005
Author(s):  
Elisa Casula ◽  
Michele Mascia ◽  
Giorgia De Gioannis ◽  
Mirella Di Lorenzo ◽  
Marco Isipato ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Anode Materials ◽  
Electricity Generation ◽  
High Surface ◽  
Three Dimensional ◽  
Low Flow ◽  
Organic Load ◽  
Extracellular Electron Transfer ◽  
Biofilm Thickness

Microbial fuel cells (MFCs) exploit the metabolic activity of electroactive microorganisms for oxidation of organic compounds and extracellular electron transfer to an external electrode. the technology is associate with very slowreaction rates, resulting in low current densities. Anodes with high specific surface should be used to increase the overall electricity generation. Carbon-based 3D materials, with high surface per unit of volume, are largely used anode materials in MFCs, although may show significant lack in efficiency due to mass transfer limitations, concentration gradients, velocity distribution and resistivity of the material. Consequently, the concomitant effect of several parameters should be assessed and quantified to design highly performing MFCs implementing 3D anode materials. In this work, miniature MFCs with 3D anodes are mathematically modelled to quantify the effect of operative parameters on performance. The model combines equations of charge conservation, mass transport phenomena, hydrodynamics, and kinetics of the involved processes under transient conditions, and provides 3D profiles with time of velocity, biofilm thickness, substrate concentration, current density and potential. The solution predicts a laminar flow, as it was expected with the low flow rates used. The concentration profiles show the consumption of substrate in the anode, with low values of local concentrations depending on organic load in the feed stream. The model also provides a versatile tool to optimise the operative conditions of the system, managing the flow arrangements to maximise either substrate removal or electricity generation.

Electricity generation in microbial fuel cells: Using humic acids as a mediator

2008 ◽  
Vol 136 ◽  
pp. S474-S475
Author(s):  
Yifeng Zhang ◽  
Liping Huang ◽  
Jingwen Chen ◽  
Xianliang Qiao ◽  
Xiyun Cai
Keyword(s):  
Fuel Cells ◽  
Humic Acids ◽  
Microbial Fuel Cells ◽  
Electricity Generation
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