Using of Oxidoreductase Producing Consortium with High Manganese Peroxidase Activity for Melanoidin Degradation and Electricity Generation from Palm Oil Mill Effluent

Abstract

Melanoidin is the dark high molecular weight formed via the Maillard reaction under high-temperature conditions. Here, the crude enzyme of melanoidin degrading bacterial consortium was extracted and determined the oxidoreductase activities like manganese peroxidase (MnP), laccase, and lignin peroxidase (LiP). The melanoidin degrading ability and electricity generation were measured. Finally, the oxidoreductase-producing consortium was used as a whole-cell biocatalyst in the air-cathode MFC. The result indicated that the MnP activity of 38.100.10 U/mL was produced from the consortium. The melanoidin removal of 85.102.00% and maximal power output of 475.691.13 W/m3 were achieved. This study gained new knowledge about using oxidoreductase-producing consortium with high MnP activity for melanoidin removal and electricity generation from palm oil mill effluent.