Bioelectrochemical approach for control of methane emission from wetlands

Microbial Electrochemical Technologies for Wastewater Treatment: Principles and Evolution from Microbial Fuel Cells to Bioelectrochemical-Based Constructed Wetlands

“…This constrains include the electrolyte resistance (ohmic), the charge-transfer resistance due to slow reaction rates on electrodes (kinetic), and the resistance caused by retarded diffusion (transport) [121]. This limitations result in low power densities and coulombic efficiencies that range between 9 to 72 mW m -2 and 0.05-10.48% [109].…”

“…Additional limiting factors that must be considered include i) the internal resistance of a CW-MFC which increases linearly as the size and distance between electrodes increase [24]; ii) the over-potential during activation and the insufficient electrical contact between bacteria and anode [122]; iii) the competition between EAB and other microorganisms (e.g. methanogenic bacteria) for electrons or substrates leading to low coulombic efficiencies [109]; iv) the deterioration of cathode over time and the excessive growth of heterotrophic bacteria around it that plummet the concentrations of electron acceptors like O2 [114]; as well as v) the high concentration of organic matter that could increase slightly the acidity inside the systems, limiting the growth of EAB and the diffusion of protons, therefore affecting the coulombic efficiency [113].…”

Microbial Electrochemical Technologies for Wastewater Treatment: Principles and Evolution from Microbial Fuel Cells to Bioelectrochemical-Based Constructed Wetlands

“…This constraint includes the electrolyte resistance (ohmic), the charge-transfer resistance due to slow reaction rates on electrodes (kinetic), and the resistance caused by retarded diffusion (transport) [123]. These limitations result in low power densities, and coulombic efficiencies that range between 9 to 72 mW m −2 and 0.05-10.48% [111].…”

“…Additional limiting factors that must be considered include i) the internal resistance of a CW-MFC, which increases linearly as the size and distance between electrodes increase [24]; ii) the over-potential during activation and the insufficient electrical contact between bacteria and anode [124]; iii) competition among EAB and other microorganisms (e.g., methanogenic bacteria) for electrons or substrates leading to low coulombic efficiencies [111]; iv) the deterioration of the cathode over time, and the excessive growth of heterotrophic bacteria around it that make the concentrations of electron acceptors like O 2 plummet [116]; as well as v) the high concentration of organic matter that could slightly increase the acidity inside the systems, limiting the growth of EAB and the diffusion of protons, and therefore affecting the coulombic efficiency [115].…”

Bioremediation in Water Environment: Controlled Electro-Stimulation of Organic Matter Self-Purification in Aquatic Environments

“…MFCs require the anode in anaerobic zones whereas the cathode needs oxygen; both redox conditions naturally occur inside CWs. For [185]. But electrobioremediation can also be merged with other mitigation approaches, such as: -Incorporating selected plants could prevent CH 4 and N 2 O production by the system [174].…”