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Human waste is explored as a renewable source for bio-energy production, utilizing Microbial Fuel Cells (MFCs) to convert organic matter into electricity.

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Representative MFC — matched on the paper’s system type only, not its reactor or geometry.

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What they did

System
MFC

What worked

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Abstract

Due to the continuous depletion of natural resources currently used for electricity generation, it is imperative to develop alternative energy sources. Human waste is nowadays being explored as an efficient source to produce bio-energy. Human waste is renewable and can be used as a source for an uninterrupted energy supply in bioelectricity or biofuel. Annually, human waste such as urine is produced in trillions of liters globally. Hence, utilizing the waste to produce bioenergy is bio-economically suitable and ecologically balanced. Microbial fuel cells (MFCs) play a crucial role in providing an effective mode of bioelectricity production by implementing the role of transducers. MFCs convert organic matter into energy using bio-electro-oxidation of material to produce electricity. Over the years, MFCs have been explored prominently in various fields to find a backup for providing bioenergy and biofuel. MFCs involve the role of exoelectrogens which work as transducers to convert the material into electricity by catalyzing redox reactions. This review paper demonstrates how human waste is useful for producing electricity and how this innovation would be beneficial in the long term, considering the current scenario of increasing demand for the supply of products and shortages of natural resources used to produce biofuel and bioelectricity.

Key findings

  • Human waste is produced in trillions of liters globally, making it a suitable source for bio-energy production.
  • MFCs play a crucial role in providing an effective mode of bioelectricity production by implementing the role of transducers.
  • Exoelectrogens in MFCs catalyze redox reactions to convert material into electricity.

Keywords

Microbial fuel cellRenewable energyBioenergyBiofuelEnergy sourceElectricity

Identifiers

DOI
10.3390/biotech11030036
Journal
BioTech
Year
2022