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Development and Optimization of Sustainable Microbial Fuel Cells for Portable Energy Solutions

This project focuses on creating a commercially viable and environmentally friendly Microbial Fuel Cell (MFC). The design emphasizes sustainability, portability, and cost-effectiveness while ensuring simplicity in operation and maintenance. Key objectives include optimizing various components and media for bacterial growth, minimizing complexity, and enhancing performance in extreme environments. Experimental results indicate potential energy generation capabilities. Acknowledgments are given to the mentors and consultants who supported this innovative endeavor.

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Development and Optimization of Sustainable Microbial Fuel Cells for Portable Energy Solutions

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  1. Andrew Huizenga Lindsay Arnold Diane Esquivel Jeff Christians Team 1: BIOVOLT

  2. Need http://scienceblogs.com/ http://kahdalea.com/

  3. Project Objectives • Develop a commercially viable Microbial Fuel Cell (MFC) • Sustainable • Portable • Simple operation • Inexpensive

  4. Design Norms • Transparency • Intuitive • Easy maintenance • Stewardship • Cost effective • Eco-friendly • Cultural Appropriateness • Common ingredients

  5. Experiments Research Prototypes • Simplified components • Agar salt bridge vs. proton exchange membrane (PEM) • No pump or filter • Ease of reproducing and testing • Easy to dump and refill • Multiple experiments • Optimization

  6. Experiments • Media simplification (substitution/elimination) • Bacterial growth kinetics • Extreme environment resistance • Electrode surface area to chamber volume

  7. Experimental Results • Final media • Baking soda, vinegar, table salt, phosphate, ammonium chloride in water • Similar results temperatures 18-30 °C • Withstands extreme variation in media • Surface area : volume ≈ 1cm2 : 1cm3

  8. Design Decisions • MFC Architecture • Proton exchange MFC • Air cathode • Waste water • Bacteria • Geobactermetallireducens • Geobactersulfurreducens • Rhodoferaxferrifeducens

  9. Design Decisions • Electrode • Stainless steel • Graphite • Platinum loaded graphite • Membrane • Proton Exchange Membrane (PEM) • Salt bridge • Feeding Process • Continuous • Batch  Semi-Batch

  10. Final Prototype

  11. Final Prototype

  12. DesignDecisions

  13. Preliminary Results • Voltage • 666 mV with 975 kΩ • Power • 0.5 μW • MFC in operation since April 15th

  14. Conclusions • Successful prototype • Sustainable • Portable • Simple operation • Inexpensive • Technology has potential • 22 μW / m2 of electrode • Literature cells produced ≈ 10-20 mW / m2

  15. Project Assessment • Subpar performance due to lack of platinum loaded electrodes • Effectively combined biology and engineering • Developed teamwork skills

  16. Acknowledgments • Professor Sykes – Team mentor • Professor Wertz – Biology consultant • Mr. Spoelhof– Industrial consultant • Professor VanAntwerp– Project idea • Ben Johnson – Biology consultant • Membranes International – Donated proton exchange membrane

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