A method and apparatus for generating power from voltage gradients at sediment-water
interfaces or within stratified euxinic water-columns is provided. Natural voltage
gradients typically exist at and about sediment-water interfaces or in isolated
water bodies. One electrode (anode) is positioned in the sediment or water just
below the redox boundary and the other electrode (cathode) is positioned in the
water above the redox boundary over the first electrode. The anode is lower in
voltage than the cathode. Current will flow when the electrodes are connected through
a load, and near-perpetual generating of worthwhile power may be sustained by the
net oxidation of organic matter catalyzed by microorganisms.
