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michka:research:microbial_fuel_cells:bruxelles2 [2014-10-08 14:33] – michkamichka:research:microbial_fuel_cells:bruxelles2 [2014-10-09 22:02] (current) – 148.122.12.234
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 ===Salt Bridges=== ===Salt Bridges===
  
-I failed a three batches of [[http://www.treehugger.com/slideshows/gadgets/make-microbial-fuel-cell/page/3/#slide-top|salt bridges]] before managing to have one stable made.+I tried three batches of [[http://www.treehugger.com/slideshows/gadgets/make-microbial-fuel-cell/page/3/#slide-top|salt bridges]] before managing to have a stable one made.
  
 The right protocol: The right protocol:
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 {{ :michka:research:microbial_fuel_cells:dscf6283.jpg?300 |}} {{ :michka:research:microbial_fuel_cells:dscf6283.jpg?300 |}}
-Mud samping location - Sint-Jans-Molenbeek, Belgium+//Mud samping location - Sint-Jans-Molenbeek, Belgium//
  
  
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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.
 +
 +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.
 +
 +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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    * 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.
 +
 +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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  • Last modified: 2014-10-08 14:33
  • by michka