Effects of KMnO4 concentration on the power density and BOD/COD of tempe waste Microbial Fuel Cell (MFC)

Abstract

Research on the effects of KMnO4 concentration as a catholyte on Microbial Fuel Cell (MFC) has been carried by amounts of previous studies. This study aims to determine KMnO4 concentration effects to the electricity and BOD/COD parameters of tempe waste pottery-based MFC. This study used dual-chamber MFC with pottery proton exchange membrane, tempe waste, and KMnO4 solutions varied from 0.1 M, 0.15 M, and 0.2 M. The MFC reactors were run in 48 hours with electricity measurement per 2 hours. The performance parameters are voltage (V), current (mA), and power density (mW/m2), Chemical Oxygen Demand (COD), and Biochemical Oxygen Demand (BOD). The highest power density was obtained at the concentration of 0.15 M of 950.3185 mW/m2, while the highest BOD and COD decreases were obtained at the concentration of 0.2 M of 96.28% and 68.26% for BOD and COD, respectively.