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Make a Microbial Fuel Cell (MFC) - Part III -
"This 5 gallon single chamber microbial fuel cell uses inexpensive conductive cloth to provide a silver catalyst and a styrofoam permeable membrane." ‎- silpol
Any power output figurres? ‎- 9000
It depends on size of bacteria colony, electrode size and internal resistance. In previous they discuss about something 0.6 -1.2 V and 82mA so it is about 0.1 W. To get better output you've gotta play with more parameters and most probably act to reduce internal resistance. ‎- silpol