Andrew Huizenga Lindsay Arnold Diane Esquivel Jeff Christians
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Transcript of Andrew Huizenga Lindsay Arnold Diane Esquivel Jeff Christians
Andrew Huizenga
Lindsay Arnold
Diane Esquivel
Jeff Christians
Overview – Need
http://scienceblogs.com/ ?
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Overview Design Prototype Future Work Conclusions
Overview – Objectives Develop a commercially viable Microbial Fuel Cell (MFC)
SustainablePortableSimple operationInexpensive
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Overview Design Prototype Future Work Conclusions
Overview – How it Works
Overview Design Prototype Future Work Conclusions
Design – Norms Intuitive
Easy operationLow maintenance
StewardshipCost effectiveEco-friendly
Cultural AppropriatenessAttainable ingredients
Overview Design Prototype Future Work Conclusions
Design – Alternatives Electrode
Stainless steelGraphitePlatinum loaded graphite
MembraneProton Exchange Membrane (PEM)Salt bridge
Feeding ProcessContinuousBatch Semi-Batch
Overview Design Prototype Future Work Conclusions
Design – Experiments Media simplification
(substitution/elimination) Bacterial growth kinetics
Extreme environment resistance
Electrode surface area to chamber volume
Overview Design Prototype Future Work Conclusions
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
Overview Design Prototype Future Work Conclusions
0 5 10 15 200
100200300400500600700800
Prototype Output
Days of Operation
Volta
ge (m
V)
New Media AddedDay 7 and Day 22
Prototype – Block Diagram
Overview Design Prototype Future Work Conclusions
Prototype – Model Design
Overview Design Prototype Future Work Conclusions
Prototype – final cell
Overview Design Prototype Future Work Conclusions
Prototype – Results Maximum Voltage
0.666 Volts at 979 kΩ Maximum Power
0.5 μW200,000,000 MFCs to power
a standard 100W bulb1,400,000 MFCs to power an iPod
Touch MFC in operation since April 15th
Overview Design Prototype Future Work Conclusions
Future Work – Marketing Sell all materials as an MFC kit Final unit cost ≈ $10.00
Overview Design Prototype Future Work Conclusions
Future Work – Upgrades Add platinum loaded
graphite electrodes1,000 – 10,000 times output
Combine different bacterial species10 – 100 times output
Best case:20 MFCs to power 100W bulb<1 MFC to power iPod Touch
Overview Design Prototype Future Work Conclusions
Conclusions Successful prototype
Sustainable Portable Simple operation Inexpensive
Technology has potential22 μW / m2 of electrodeSimilar cells have produced ≈ 10-20 mW / m2
Overview Design Prototype Future Work Conclusions
Questions?