Power generation performance of microbial fuel cells with elephant grass straw hydrolyzate

At present, the mainly energy use of waste biomass is power generation by combustion, while there are still some problems existing such as low energy efficiency, high cost and the difficulties of straw storage, collection and transportation. DMFC (Double Microbial Fuel Cell) was constructed with graphite plate as cathode and graphite felt as anode in this experiment. The influencing factors of the performance of the cell were studied when elephant grass straw hydrolyzate used as the anode electronic receptors. The research results showed : (1) When using elephant grass straw hydrolyzate as the anode substrate, the power density could reach 125.89 mW/m² power density with the maximum output voltage of 454mV. (2) In a electricity production cycle, the open circuit voltage remained at about 300 mV. (3) The output voltage changed with the increase of the external resistor, the maximum power density was observed at 1000 Ω in the study.