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By: Abenet Addisu

By: Abenet Addisu. Electricity Generation Using an Air-Cathode Single Chamber Microbial Fuel Cell in the Presence and Absence of a Proton Exchange Membrane. Author Affiliations. The Department of Civil and Environmental Engineering The Penn State Hydrogen Energy Center

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By: Abenet Addisu

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  1. By: Abenet Addisu Electricity Generation Using anAir-Cathode Single ChamberMicrobial Fuel Cell in the Presenceand Absence of a Proton ExchangeMembrane

  2. Author Affiliations • The Department of Civil and Environmental Engineering • The Penn State Hydrogen Energy Center • The Pennsylvania State University • RamanathanRamnarayanan • Shaoan Cheng • Study Supported By: National Science Foundation

  3. What does a Microbial Fuel Cell look like?

  4. Study Objective • Is a PEM necessary in microbial fuel cells? • Increase power density to levels never achieved by a aqueous cathode systems.

  5. Rationale • The making of a more economically friendly Microbial Fuel Cell. • While increasing it’s power density levels.

  6. Methods • Type of Design for Air-Cathode with PEM • Consists of… • Anode and cathode placed on opposite sides in a Plexiglas • PEM cathode bonded the PEM directly onto a flexible carbon-cloth electrode. • Hot-pressed onto cathode. • Type of Design for Air- Cathode without PEM • Same structure except without PEM.

  7. Methods

  8. Methods • Experimental Conditions • Wastewater was gathered from the Pennsylvania State University Wastewater Treatment Plant. • Wastewater was put into the anode for bacteria to colonize. • 1200 mg/L of glucose was added to the wastewater for some trials.

  9. Methods • Tests Used • Voltage was measured with multimeter then converted to power density (P=IV/A). • Oxygen across the cathode was calculated by measuring the dissolved oxygen in the anode chamber over time. • Using a nonconsumptivefiber optic oxygen probe.

  10. Results Microbial Fuel Cell With PEM Microbial Fuel Cell Without PEM

  11. Sources of Errors • No precautions were taken to maintain anaerobic conditions during liquid replacement. • Heating the PEM and cathode to bond them together causing… • Carboxylation • Degeneration of the catalyst of the cathode.

  12. Author’s Conclusion • Main disadvantage of not having a PEM • Potential for the loss of substrate due to aerobic oxidation by bacteria in the anode chamber. • The PEM can be eliminated while increasing power generation.

  13. Study Conclusion • You can make a Microbial Fuel Cell without an PEM. • Several types of organic material can be used including wastewater. • Relation To My Project • A high-tech version of my project. • Variety of different substances in the anode.

  14. Critique • Somewhat confusing • A lot of measurements and abbreviations. • Lines on graphs were bunched together forming a unreadable blob. • If you’re not familiar with it’s vocabulary, it’s impossible to decipher.

  15. By: Abenet Addisu Electricity Generation Using anAir-Cathode Single ChamberMicrobial Fuel Cell in the Presenceand Absence of a Proton ExchangeMembrane

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