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Andrew Huizenga Lindsay Arnold Diane Esquivel Jeff Christians

Andrew Huizenga Lindsay Arnold Diane Esquivel Jeff Christians. Overview – Need. ?. http://scienceblogs.com/. http://farm1.static.flickr.com/35/74109013_0359f3f160.jpg. Overview – Objectives. Develop a commercially viable Microbial Fuel Cell (MFC) Sustainable Portable

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Andrew Huizenga Lindsay Arnold Diane Esquivel Jeff Christians

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  1. Andrew Huizenga Lindsay Arnold Diane Esquivel Jeff Christians

  2. Overview – Need ? http://scienceblogs.com/ http://farm1.static.flickr.com/35/74109013_0359f3f160.jpg

  3. Overview – Objectives • Develop a commercially viable Microbial Fuel Cell (MFC) • Sustainable • Portable • Simple operation • Inexpensive http://farm1.static.flickr.com/35/74109013_0359f3f160.jpg

  4. Overview – How it Works

  5. Design – Norms • Intuitive • Easy operation • Low maintenance • Stewardship • Cost effective • Eco-friendly • Cultural Appropriateness • Attainable ingredients

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

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

  8. Design – Results • Final media • Baking soda, vinegar, table salt, phosphate, ammonium chloride in water • Similar results temperatures 65-86 °F • Withstands extreme variation in media • Surface area : volume ≈ 1in2 : 1in3

  9. Prototype – Block Diagram

  10. Prototype – Model Design

  11. Prototype – final cell

  12. Prototype – Results • Maximum Voltage • 0.666 Volts at 979 kΩ • Maximum Power • 0.5 μW • 200,000,000 MFCs to power a standard 100W bulb • 1,400,000 MFCs to power an iPod Touch • MFC in operation since April 15th

  13. Future Work – Marketing • Sell all materials as an MFC kit • Final unit cost ≈ $10.00

  14. Future Work – Upgrades • Add platinum loaded graphite electrodes • 1,000 – 10,000 times output • Combine different bacterial species • 10 – 100 times output • Best case: • 20 MFCs to power 100W bulb • <1 MFC to power iPod Touch

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

  16. Questions?

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