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The Fabrication of the Coupled Microfluidic Microbial Electrochemical Cells for Oxalate Biodegradation

Yahyanezhad Gele, Maedeh | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54056 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Yaghmaei, Soheila; Mardanpour, Mohammad Mahdi
  7. Abstract:
  8. This study invewstigates the performance of a coupled microfluidic microbial fuel cell-microbial electrolysis cell producing biohydrogen in presence of shewanella oneidensis MR-1 from excreted oxalate of human metabolic processes. The effect of different parameters such as cell geometry including spiral and straight microchannels, precipitation of nano-particles on anode surface, substrate flowrate and the number of microfluidic microbial fuel cell supporting required power for microbial electrolysis cell were assessed. By anode modification, the maximum current density of 428 W m-3 was obtained which is less than 6-fold of the maximum power density in the cell fabricated by zinc foil. The comparison of microfluidic microbial fuel cell with spiral microchannel with the one fabricated by a straight microchannel demonstrates that the straight microchannel braught about more than 94-fold increase in the maximum power density. The maximum of biohydrogen production rate in the microfluidic microbial electrolysis cell supported by one microbial fuel cell was 5.7 µl µlsubstrate-1 day-1 and for the microbial electrolysis cell supported by two microbial fuel cell was 7.8 µl µlsubstrate-1 day-1. The system characterizations were evaluated based on the field emission scanning electron Microscope (FESEM), X-ray powder diffraction (XRD), energy dispersive spectroscopy (EDS) and polarization curves. The remarkable bioenergy production by using zinc electrode in a simple and cost-effective system and utilization of waste materials of living organs are the exceptional features of this study. This is the first step to prove the capabilitry of the system to be used as a platform of implantable medical devices in near future
  9. Keywords:
  10. Oxalate ; Shewanella Oneidensis Bacteria ; Coupled System ; Electrochemical Cells ; Microfluidic Couple Systems ; Microbial Fuel Cell ; Microbial Electrolysis Cell

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