Membraneless Plant Microbial Fuel Cell using Water Hyacinth (Eichhornia crassipes) for Green Energy Generation and Biomass Production

摘要

The plant microbial fuel cell (PMFC) is a technology built to produce renewable and sustainable electricity in order to meetthe increasing global demand. This study demonstrates the potential application of PMFC in swamps dominated by water hyacinth toproduce biological energy and plant biomass. In this research, the plant was integrated into a microbial fuel cell that adopts various typesof anode materials such as carbon felt, iron and zinc, with a varying distance of 10 and 20 cm between the anode and cathode. Organiccompounds emerging from the photosynthesis process were deposited by plant roots, which were then oxidized by bacteria in the mudmedia. The result showed that the developed PMFC produced a voltage and current density of 244.8 mV and 185.4 mA/m2, respectively,for 30 days, with a maximum power of 100.2 mW/m2 in the cells using zinc as anode material with an electrode spacing of 10 cm.Furthermore, the pH value on PMFC with a longer electrode was higher than the shorter distance due to the protons' inability to movefrom anode to cathode against the force of gravity. In conclusion, PMFC which utilizes water hyacinth has a good performance inconverting chemical energy from the substrate into electrical energy, and has the potential to be developed in underdeveloped areas.