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--- michka:research:microbial_fuel_cells:marseille3 [2014-10-03 12:33] – michka
+++ michka:research:microbial_fuel_cells:marseille3 [2014-10-08 14:39] (current) – michka
@@ Line 6: / Line 6: @@
 __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
    * **Container**: crate, covered with a transparent garbage plastic bag.
@@ Line 25: / Line 30: @@
 ====Crate Design #2====
 __Design features__
@@ Line 51: / Line 55: @@
 Performances on Day2:
-   * **Voltage**: around 130 mV.
+   * **Voltage**: around 130 mV peak.
-   * **Current**: around 0.5 mA, drops quickly to 0.4 mA.
+   * **Current**: around 0.5 mA peak.
+   * Strange measurement behavior:
+     * Voltage starts at 80 mV, and builds up to 130 mV in about 15 minutes.
+     * Current starts at 0.7mA and drops to 0.3mA in about 15 minutes too.
+Performances on Day3:
+   * **Voltage**: around 250 mV, stable.
+   * **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.
+**Max (stable) Power Measured**: around 350 microW.
+====Pile Microbienne Marseillaise====
+{{ :michka:research:microbial_fuel_cells:dscf6391.jpg?300 |}}
+__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.
+     * Volume: 0.5L
+   * **Container**: 2L plastic bottle.
+   * **Proton Exchange Membrane**: a piece of cardboard.
+     * Surface: the bottle's section (diameter of 6-8 cm).
+   * **Water**: seewater.
+   * **Anode**: copper covered with carbon, extracted from a dead DELL PC battery found in the LFO storage space.
+     * Surface: 50*5 cm2
+   * **Cathode**: copper covered with less carbon, scrap from the [[michka:research:supercapacitors|supercapacitors]] experiment.
+     * Surface: 20*5 cm2
+__Performances__
+Performances on Day0:
+   * **Voltage**: about 13mV
+   * **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__
+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.
-**Max Power Measured**: 65 microW
+New long-term experiments should be conducted to test other parameters, including more broadly available electrode materials.