EFFECT OF ELECTRODES POSITION ON SEDIMENT MICROBIAL FUEL CELL OUTPUT VOLTAGES

Increasing global energy demand created a huge attention in utilizing numerous energy sources which are renewable and environmentally friendly. Sediment Microbial Fuel Cell (SMFC) is a very new technology and could be considered as renewable energy. Studying SMFC parameters help in opening doors for its amendment and innovate better methods in harvesting more voltages to generate biosensors or other applications. Two positions were appliyed to test the optimum one and study the relationship of water level and sun light and temperature by connecting them to get one answer. Vertical subsurface constructed wetland planted with Cyperus Alternifolius was implemented within two aquariums. The best output voltage was performed for embedded cathode position by reaching to 75 mV whilst free cathode position hits value of 33 mV. Both types showed same pattern in changing of voltage except for the first five days when voltages decreased from (22.3-1.5 mV) and increased from(8-31.4 mV) before starting to their peak values for embedded and free cathode positions, respectively.