Microbial Fuel Cells: A Sustainable Solution for Wastewater Treatment and Energy Generation

Abstract

A novel bio electrochemical technology known as microbial fuel cells (MFCs) offers a decentralized, long-term solution to the world’s water and energy problems by treating wastewater and producing renewable electricity simultaneously. In this study, we investigate the possibility of MFCs treating wastewater and producing bioelectricity at the same time, highlighting its dual functioning. Through the optimization of electrode materials, microbial consortia, and reactor layouts, this research primarily aims to enhance the performance and efficiency of MFCs. Using carbon-based anodes, proton exchange membranes, and synthetic wastewater, lab-sized MFCs were constructed in this way to create circumstances as close to reality as feasible. Voltage, current density, and power output were used to quantify bioelectricity generation, while microbial activity was used to measure the breakdown of organic contaminants. In addition to consistent power outputs, the results demonstrated a significant decrease in COD, which is indicative of effective wastewater treatment. Energy recovery was greatly improved by increasing the anodic biofilm and electrode surface area, leading to a dramatic increase in electron transfer rates. Additionally, substrate utilization rates were enhanced through the employment of mixed microbial consortia, which aided in the breakdown of complex organic molecules. According to these findings, MFCs have a lot of promise as a greener and cheaper substitute for conventional wastewater treatment methods. In light of the foregoing, it is reasonable to conclude that MFCs have the makings of a long-term solution for distributed wastewater management and renewable energy generation, particularly in underserved regions. However, there are still significant obstacles to broad adoption, including issues with scalability, operational stability over the long term, and material prices. In order to make this technology more commercially viable and less harmful to the environment, researchers should work on improving MFC designs, maximizing microbial ecosystems, and finding ways to incorporate it into current wastewater treatment systems.

DOI - https://doi.org/10.65525/SVUP.9788198471956.2025.128-145