Understanding the interdependence of strain of electrotroph, cathode potential and initial Cu(II) concentration for simultaneous Cu(II) removal and acetate production in microbial electrosynthesis systems

Chemosphere ◽  
2020 ◽  
Vol 243 ◽  
pp. 125317 ◽  
Author(s):  
Jiaxin Hou ◽  
Liping Huang ◽  
Peng Zhou ◽  
Yitong Qian ◽  
Ning Li
Keyword(s):  
Cathode Potential ◽  
Acetate Production ◽  
Microbial Electrosynthesis

Continuous acetate production through microbial electrosynthesis from CO2with microbial mixed culture

2015 ◽  
Vol 91 (4) ◽  
pp. 921-927 ◽  
Author(s):  
Pau Batlle-Vilanova ◽  
Sebastià Puig ◽  
Rafael Gonzalez-Olmos ◽  
Maria Dolors Balaguer ◽  
Jesús Colprim
Keyword(s):  
Mixed Culture ◽  
Acetate Production ◽  
Microbial Electrosynthesis

scholarly journals Accelerated H2 Evolution during Microbial Electrosynthesis with Sporomusa ovata

Catalysts ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 166 ◽  
Author(s):  
Pier-Luc Tremblay ◽  
Neda Faraghiparapari ◽  
Tian Zhang
Keyword(s):  
Hydrogen Evolution ◽  
Cathode Surface ◽  
Electrical Energy ◽  
Fresh Medium ◽  
Cathode Potential ◽  
Cathode Chamber ◽  
H2 Evolution ◽  
Microbial Electrosynthesis ◽  
Sporomusa Ovata

Microbial electrosynthesis (MES) is a process where bacteria acquire electrons from a cathode to convert CO2 into multicarbon compounds or methane. In MES with Sporomusa ovata as the microbial catalyst, cathode potential has often been used as a benchmark to determine whether electron uptake is hydrogen-dependent. In this study, H2 was detected by a microsensor in proximity to the cathode. With a sterile fresh medium, H2 was produced at a potential of −700 mV versus Ag/AgCl, whereas H2 was detected at −500 mV versus Ag/AgCl with cell-free spent medium from a S. ovata culture. Furthermore, H2 evolution rates were increased with potentials lower than −500 mV in the presence of cell-free spent medium in the cathode chamber. Nickel and cobalt were detected at the cathode surface after exposure to the spent medium, suggesting a possible participation of these catalytic metals in the observed faster hydrogen evolution. The results presented here show that S. ovata-induced alterations of the cathodic electrolytes of a MES reactor reduced the electrical energy required for hydrogen evolution. These observations also indicated that, even at higher cathode potentials, at least a part of the electrons coming from the electrode are transferred to S. ovata via H2 during MES.

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