Differences

This shows you the differences between two versions of the page.

--- michka:research:microbial_fuel_cells:marseille3 [2014-10-03 12:25] – 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.
+{{ :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 15: / Line 22: @@
      * Surface: 70*5 cm2
-Performances:
+__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.
@@ Line 23: / Line 31: @@
 ====Crate Design #2====
+__Design features__
-Design features:
    * **Substrate**: mud gathered from La Friche's garden on the day of assembly.
      * Volume: 80*30*2 cm3
@@ Line 36: / Line 44: @@
      * Surface: 70*5 cm2
-Performances:
+__Performances__
-   * **Voltage**: started at 5mV, went up avove 45 the second day.
+Performances on Day0:
+   * **Voltage**: around 5 mV.
    * **Current**: around 0.1 mA.
-**Max Power Measured**: 0.5 microW
+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.