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--- michka:research:microbial_fuel_cells:marseille3 [2014-10-01 16:14] – created michka
+++ michka:research:microbial_fuel_cells:marseille3 [2014-10-08 14:39] (current) – michka
@@ Line 1: / Line 1: @@
 ====Experiment "Marseille3"====
+These experiments have been conducted during the open workshops of the [[http://reso-nance.org/whattheflok/accueil|What the Flok ?]] festival taking place in Marseille, from Septembre 29th to October 4th.
 ====Crate Design #1====
-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.
-   * Container: crate, covered with a transparent garbage plastic bag.
+{{ :michka:research:microbial_fuel_cells:dscf6377.jpg?300 |Clay Sampling Location - Niolon, France}}
-   * Proton Exchange Membrane: printer paper with low amount of ink.
+//Clay sampling spot - Niolon, France.//
-   * Water comes from La Friche's tap - maybe chlorinated.
-   * Anode: copper covered with carbon, extracted from a dead DELL PC battery found in the LFO storage space.
+   * **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.
+   * **Proton Exchange Membrane**: printer paper with low amount of ink.
+     * Surface: 80*30 cm2
+   * **Water** comes from La Friche's tap - maybe chlorinated.
+   * **Anode**: copper covered with carbon, extracted from a dead DELL PC battery found in the LFO storage space.
      * Surface: 70*5 cm2
-   * Cathode: copper covered with less carbon, extracted from the same battery.
+   * **Cathode**: copper covered with less carbon, extracted from the same battery.
      * Surface: 70*5 cm2
+__Performances__
+   * **Voltage**: started at 30mV, went up avove 40, and dropped down to 0 in 2 hours.
+   * **Current**: started at 0.125 mA, and dropped down to 0 in 2 hours.
+**Max Power Measured**: 3.75 microW
 ====Crate Design #2====
+__Design features__
+   * **Substrate**: mud gathered from La Friche's garden on the day of assembly.
+     * Volume: 80*30*2 cm3
+   * **Container**: crate, covered with a transparent garbage plastic bag.
+   * **Proton Exchange Membrane**: three to four overlapping sheets of newspaper, covered in ink.
+     * Surface: 80*30 cm2
+   * **Water**: mainly rainwater from the mudsource, with some tap water (0.5L) to complement - maybe chlorinated.
+   * **Anode**: copper covered with carbon, extracted from a dead DELL PC battery found in the LFO storage space.
+     * Surface: 70*5 cm2
+   * **Cathode**: copper covered with less carbon, extracted from the same battery.
+     * Surface: 70*5 cm2
+__Performances__
+Performances on Day0:
+   * **Voltage**: around 5 mV.
+   * **Current**: around 0.1 mA.
+Performances on Day1:
+   * **Voltage**: around 45 mV.
+   * **Current**: around 0.1 mA.
+Performances on Day2:
+   * **Voltage**: around 130 mV peak.
+   * **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.
+New long-term experiments should be conducted to test other parameters, including more broadly available electrode materials.