Differences

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

Link to this comparison view

Both sides previous revision Previous revision
Next revision		 Previous revision
michka:research:microbial_fuel_cells:marseille3 [2014-10-01 17:06] – michkamichka:research:microbial_fuel_cells:marseille3 [2014-10-08 14:39] (current) – michka
Line 1: Line 1:
 ====Experiment "Marseille3"==== ====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==== ====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      * Volume: 80*30*2 cm3
    * **Container**: crate, covered with a transparent garbage plastic bag.    * **Container**: crate, covered with a transparent garbage plastic bag.
Line 15: Line 22:
      * Surface: 70*5 cm2      * Surface: 70*5 cm2
  
-Performances:+__Performances__ 
    * **Voltage**: started at 30mV, went up avove 40, and dropped down to 0 in 2 hours.    * **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.    * **Current**: started at 0.125 mA, and dropped down to 0 in 2 hours.
Line 23: Line 31:
 ====Crate Design #2==== ====Crate Design #2====
  
 +__Design features__
  
-Design features: 
    * **Substrate**: mud gathered from La Friche's garden on the day of assembly.    * **Substrate**: mud gathered from La Friche's garden on the day of assembly.
      * Volume: 80*30*2 cm3      * Volume: 80*30*2 cm3
Line 35: Line 43:
    * **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      * 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.
  • michka/research/microbial_fuel_cells/marseille3.1412183193.txt.gz
  • Last modified: 2014-10-01 17:06
  • by michka