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| Both sides previous revision Previous revision | Next revisionBoth sides next revision | ||
| michka:research:microbial_fuel_cells [2014-07-11 10:31] – michka | michka:research:microbial_fuel_cells [2014-07-11 10:38] – michka | ||
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| ===One Container in Crate Design=== | ===One Container in Crate Design=== | ||
| - | + | * Layed down the jar in a crate covered with a plastic bag and filled with water. | |
| + | * Five times bigger cathode, made of wiring, and then replaced by a flattened aluminium can. | ||
| ==Why ?== | ==Why ?== | ||
| - | Augemented cathode surface area & reduced water layer width for oxygen access. | + | |
| + | |||
| + | ==Results== | ||
| + | |||
| + | * No improved voltage with bigger wiring cathode. | ||
| + | * Improved voltage (300 mV) with aluminium can cathode. | ||
| + | * When putting directly the multimeter cathode in water, we obtain 600 mV. | ||
| + | |||
| + | ==Conclusion== | ||
| + | |||
| + | * The geometry of the multimeter cathode may be better for voltage than the one made of wiring or aluminium can. However, surface area is necessary to obtain current. | ||
| ===Crate Paper Design=== | ===Crate Paper Design=== | ||
| Line 49: | Line 60: | ||
| * Negative voltage when putting a rock on cathode to maintain it in water. | * Negative voltage when putting a rock on cathode to maintain it in water. | ||
| + | * No improved voltage by the new flat design. | ||
| + | * Still no current measurable, probably very low. | ||
| + | |||
| + | ==Conclusion== | ||
| + | |||
| + | * Is paper a good PEM ? | ||
| ===Two Containers Design=== | ===Two Containers Design=== | ||
| Line 60: | Line 77: | ||
| * If water is not clean, voltage increases up to 100 mV. | * If water is not clean, voltage increases up to 100 mV. | ||
| * Two multimeter electrodes in the mud: 10-80 mV depending on location. | * Two multimeter electrodes in the mud: 10-80 mV depending on location. | ||
| + | |||
| + | ===Overall Conclusion=== | ||
| + | |||
| + | * Maybe it needs a longer period to get started - eating up all the oxygen around the anode. | ||
| + | * Maybe our PEMs are not good. | ||
| ====Design Improvements Ideas==== | ====Design Improvements Ideas==== | ||
michka