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| michka:research:microbial_fuel_cells:bruxelles2 [2014-09-26 10:04] – michka | michka:research:microbial_fuel_cells:bruxelles2 [2014-10-09 16:09] – michka | ||
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| ====Experiment " | ====Experiment " | ||
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| ===Salt Bridges=== | ===Salt Bridges=== | ||
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| ===Mud, Tall=== | ===Mud, Tall=== | ||
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| + | //Mud samping location - Sint-Jans-Molenbeek, | ||
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| Design details: | Design details: | ||
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| * Current is in the 1-2mA range. | * Current is in the 1-2mA range. | ||
| * Power is therefore in the mW range. | * Power is therefore in the mW range. | ||
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| + | Longer-term results (12 days & more): | ||
| + | * Tension is stable at 110 mV, but drops when measuring current (and rises up afterwards). | ||
| + | * Current is stable at 107 microA, but drops after measuring tension (and rises up afterwards). | ||
| + | * Overall power is therefore around 11 mW. | ||
| ===Mud, Small=== | ===Mud, Small=== | ||
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| * Current is sensitive to oxygen presence, and is very low - about 0.3 mV when activated, dropping to 0.1 mV at rest. | * Current is sensitive to oxygen presence, and is very low - about 0.3 mV when activated, dropping to 0.1 mV at rest. | ||
| * Power is therefore in the microW range. | * Power is therefore in the microW range. | ||
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| + | Longer-term results (12 days & more): | ||
| + | * Tension is stable at 20 mV. | ||
| + | * Current is stable at 1 microA. | ||
| + | * Overall power is therefore around 20 microW. | ||
| ===Vegetable Waste & Compost Tea=== | ===Vegetable Waste & Compost Tea=== | ||
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| Design details: | Design details: | ||
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| * Current is sensitive to oxygen presence, and is very low - about 0.4 mV when activated, dropping to 0.1 mV at rest. | * Current is sensitive to oxygen presence, and is very low - about 0.4 mV when activated, dropping to 0.1 mV at rest. | ||
| * Power is therefore in the microW range. | * Power is therefore in the microW range. | ||
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| + | Longer-term results (12 days & more): | ||
| + | * Tension is stable at 120 mV. | ||
| + | * Current is stable at 135 microA. | ||
| + | * Overall power is therefore around 16 mW. | ||
| ===Conclusion=== | ===Conclusion=== | ||
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| * Electrode surface area seems an important feature. | * Electrode surface area seems an important feature. | ||
| * Most of the mud in the Tall-Mud design has been sitting here for a week, which may have an influence on community development. | * Most of the mud in the Tall-Mud design has been sitting here for a week, which may have an influence on community development. | ||
| + | * Considering electrode area and overall volume, the compost tea design seems very productive. | ||
| ===Further Designs=== | ===Further Designs=== | ||
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| * Look for carbon electrodes, which seem more appropriate | * Look for carbon electrodes, which seem more appropriate | ||
| * Replace salt bridge with paper | * Replace salt bridge with paper | ||
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148.122.12.234