Microbes capable of manganese oxidation have also been demonstrated to increase current by two orders of magnitude by cycling manganese on a cathode. Manganese used as a final electron acceptor is reduced and precipitated on the electrode as Mn(IV), the manganese oxidizing organisms oxidize the Mn(IV) to Mn(II) which in turn can be reduced once again by the electrode . The use of a biocathode has recently gained interest in the treatment of wastewater. The use of a biocathode offers the simultaneous removal of organic compounds at the anode link to nitrogen removal at the cathode .