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Microbial Fuel Cells (MFCs) are a green technology that harnesses bio-electrochemical processes to generate electricity from organic waste, with potential applications in powering portable electronic devices and wastewater treatment.

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REVIEW

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Abstract

Microbial fuel cell (MFC) is a green technology and is an alternative energy resource of fossil fuels. MFC is the class of Bio-electro-chemical patterns with novel property, like wastewater treatment, electricity generation and biosensor operation. MFCs are ingenious devices that harness the power of bio-electrochemical processes to generate electric current by breaking down organic waste found in wastewater. These systems establish a fascinating connection between microbial metabolism and electricity production. The microbes within the MFCs thrive on the nutrients present in their environment and convert the energy stored in the organic matter into usable electricity. This electrical energy can be effectively utilized to power various essential portable electronic devices such as mobile phones, laptops, TVs, air dryers, threading machines, chargeable torches, as well as devices used in the air force, outer space, and weather stations. The maximum power produced by MFC using an Iron anode is 170 mW·m⁻², 0.645 v, while MFCs have better power efficiency in mix culture Microbs 30 mA, 3,600 mW·m⁻². It has been observed that MFCs equipped with carbon-based electrodes tend to have a longer lifespan compared to those using metal-based electrodes. However, one drawback of carbon-based electrode MFCs is that they generally exhibit lower power output. In recent times, the investment focus on MFC research has significantly improved the analysis of its chemical, microbiological, and electrochemical aspects. These advancements have led to notable enhancements in the sensing capabilities of MFCs. In this review, we have summarized the MFCs, their working principle, types, composition and the various factors which affect the performance of these MFCs.

Key findings

  • MFCs can produce a maximum power of 170 mW·m⁻² with an Iron anode and 3,600 mW·m⁻² with mix culture microbes.
  • Carbon-based electrodes improve power efficiency in MFCs.
  • MFCs have been observed to have better power efficiency in mix culture microbes compared to single culture microbes.

Keywords

Microbial fuel cellElectricity generationElectricityChemical energyAnodeProcess engineering

Identifiers

DOI
10.37256/sce.4220233125
Journal
Sustainable Chemical Engineering
Year
2023