Method for microbially generating electricity and microbial power generator

A method for microbially generating electricity by using a microbial power generator which includes:

• an anode chamber having an anode and retaining a solution containing a microorganism and an electron donor;
• and
• a cathode chamber having a cathode which contacts an ion-permeable nonconductive membrane, the ion-permeable nonconductive membrane separating the cathode chamber from the anode chamber,
• said method comprising a step of generating power by feeding an oxygen-containing gas to the cathode chamber,
• wherein carbon dioxide and water vapor are contained in the oxygen-containing gas to be fed to the cathode chamber.

A microbial power generator comprising:

• an anode chamber having an anode and retaining a solution containing a microorganism and an electron donor;
• a cathode chamber having a cathode which contacts an ion-permeable nonconductive membrane, the ion-permeable nonconductive membrane separating the cathode chamber from the anode chamber;
• and
• means for feeding an oxygen-containing gas to the cathode chamber,
• wherein the generator is provided with means for feeding a biologically treated exhaust gas into the cathode chamber.

A microbial power generator comprising:

• an anode chamber having an anode and retaining a solution containing a microorganism and an electron donor;
• a cathode chamber having a cathode which contacts an ion-permeable nonconductive membrane, the ion-permeable nonconductive membrane separating the cathode chamber from the anode chamber;
• and
• means for feeding an oxygen-containing gas to the cathode chamber,
• wherein the generator is provided with means for making carbon dioxide and water vapor be contained in the oxygen-containing gas to be fed to the cathode chamber.