Patent ID: 8790833

Claim:
A floating-type microbial fuel cell comprising: a reactor having a lower substrate inlet/outlet port disposed in a lower surface thereof and a side substrate inlet/outlet port disposed in a lower side portion thereof, and an upper connection hole formed in an upper surface thereof; a cathode installed on the upper surface of the reactor; an anode electrically connected to the cathode, and installed in a lower region of the reactor; an ion exchange membrane installed between the anode and the cathode; a vent hole foci ted for discharging gases generated under the anode by microorganisms to the exterior and not accumulating the gases under the ion-exchange membrane; and a floating unit installed at an outer periphery of the reactor and floatable in a substrate solution, wherein the cathode is positioned at a region in the substrate solution having a dissolved oxygen concentration higher than that of a region at which the anode is positioned, and the anode is positioned at a region in the substrate solution having an amount of electrons generated by microorganisms larger than that of a region at which the cathode is positioned.