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michka:research:microbial_fuel_cells [2014-09-25 13:44] – michkamichka:research:microbial_fuel_cells [2014-09-26 09:32] – michka
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 ====Experiments==== ====Experiments====
  
-===One Container Design=== +   * [[michka:research:microbial_fuel_cells:Nantes1|Nantes1]] 
- +   * [[michka:research:microbial_fuel_cells:Bruxelles2|Bruxelles2]]
-{{ :michka:research:img_5901.jpg?300 |}} +
- +
-   * Wiring as electrode. +
- +
-==Results== +
- +
-   * Peak voltage at 100mV, drops to 60, stable. +
-   * Voltage changes with oxygenation - + 10 mV. +
- +
-===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 ?== +
- +
-   * 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=== +
- +
-{{ :michka:research:img_5905.jpg?300 |}} +
-{{ :michka:research:img_5906.jpg?300 |}} +
-{{ :michka:research:img_5946.jpg?300 |}} +
- +
- +
-   * Flattened aluminium can as electrode. +
-   * Thick paper sheet as PEM. +
- +
-==Why?== +
- +
-   * Reduced PEM width. +
-   * Augmented electrode (both) surface area. +
- +
-==Results== +
- +
-   * 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. +
-   * The addition of coke drops (H+) at the cathode do not help current generation. +
- +
-==Conclusion== +
- +
-   * Is paper a good PEM ? +
- +
-===Two Containers Design=== +
- +
-{{ :michka:research:img_5948.jpg?300 |}} +
- +
-   * Two bottles +
-   * Saline bridge made of rope dipped in salt solution & wrapped in tape. +
-   * Hard-drive metal box as electrode material. +
- +
-==Results== +
- +
-   * The addition of coke drops (H+) at the cathode do not help current generation. +
- +
-===Other results=== +
- +
-   * Two multimeter electrodes directly in water: about 30 mV. +
-   * One mutimeter electrode on aluminium can dipped in water, one directly in water: about 30 mV. +
-     * If water is not clean, voltage increases up to 100 mV. +
-   * 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/research/microbial_fuel_cells.txt
  • Last modified: 2018-04-26 12:44
  • by michka