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michka:research:microbial_fuel_cells:marseille3 [2014-10-04 14:50] – michkamichka:research:microbial_fuel_cells:marseille3 [2014-10-08 14:39] (current) – michka
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 __Design features__ __Design features__
-   * **Substrate**: topsoil gathered from La Friche's garden - two days before assembly - inoculated with 10 mL of clay gathered in Niolon on the day of assembly.+ 
 +{{ :michka:research:microbial_fuel_cells:dscf6377.jpg?300 |Clay Sampling Location - Niolon, France}} 
 +//Clay sampling spot - Niolon, France.// 
 + 
 + 
 +   * **Substrate**: topsoil gathered from La Friche's garden - two days before assembly - inoculated with 10 mL of clay gathered in Niolon (picture above) on the day of assembly.
      * Volume: 80*30*2 cm3      * Volume: 80*30*2 cm3
    * **Container**: crate, covered with a transparent garbage plastic bag.    * **Container**: crate, covered with a transparent garbage plastic bag.
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 ====Crate Design #2==== ====Crate Design #2====
- 
  
 __Design features__ __Design features__
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    * **Voltage**: around 250 mV, stable.    * **Voltage**: around 250 mV, stable.
    * **Current**: around 1.5 mA peak, decreasing slowly, stabilized around 0.60 mA.    * **Current**: around 1.5 mA peak, decreasing slowly, stabilized around 0.60 mA.
 +
 +Performances on Day4:
 +   * **Voltage**: around 350mV, stable.
 +   * **Current**: around 1 mA.
  
 **Peak Power Measured**: 375 microW. **Peak Power Measured**: 375 microW.
  
-**Max (stable) Power Measured**: 150 microW.+**Max (stable) Power Measured**: around 350 microW.
  
 ====Pile Microbienne Marseillaise==== ====Pile Microbienne Marseillaise====
 +
 +{{ :michka:research:microbial_fuel_cells:dscf6391.jpg?300 |}}
  
 __Design features__ __Design features__
 +
 +{{ :michka:research:microbial_fuel_cells:dscf6389.jpg?300 |}}
 +//Marine sediments sampling spot - Marseille, France//
 +
 +
    * **Substrate**: sea sediments gathered ten meters from the Catalan beach in Marseille on the day of assembly.    * **Substrate**: sea sediments gathered ten meters from the Catalan beach in Marseille on the day of assembly.
      * Volume: 0.5L      * Volume: 0.5L
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 __Performances__ __Performances__
 +
 +Performances on Day0:
    * **Voltage**: about 13mV    * **Voltage**: about 13mV
    * **Current**: about 0.1 mA    * **Current**: about 0.1 mA
 +
 +Performances on Day1:
 +   * **Voltage**: about 110mV
 +     * **Current**: starting at 7 mA ! And dropping slowly
 +
 +**Peak Power Measured**: 770 microW
  
 __Observations__ __Observations__
  
 Even though the multimeter was connected the wrong way (+ on anode, - on cathode), we first had positive (and quite high) current and voltage value. Is this due to remanant charges from the PC battery ? Even though the multimeter was connected the wrong way (+ on anode, - on cathode), we first had positive (and quite high) current and voltage value. Is this due to remanant charges from the PC battery ?
 +
 +==Conclusion==
 +
 +From both these expriments and those conducted in Bruxelles, we can conclude that the MFC behavior improves and stabilizes with time.
 +
 +As the "pile micrboienne marseillaise" increases its performance way quicker than the "Crate Design #2" It seems that a better mcirobial & nutrient source induces quicker results.
 +
 +Using newspaper or cardboard as a Proton Exchange Membrane seems fine.
 +
 +New long-term experiments should be conducted to test other parameters, including more broadly available electrode materials.

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