MESSAI.iO

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A microbial fuel cell (MFC) was constructed to treat sheep manure and convert it into renewable energy. The MFC's performance was improved with a power management system, increasing the voltage output from 0.5V to 2V. This novel application can utilize bioenergy from waste to power small electronic devices.

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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
Substrate
real wastewater

What worked

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Abstract

Abstract A microbial fuel cell (MFC) has been conceived and constructed for the treatment of the sheep manure wastes and conversion them into clean sustainable renewable energy. The chemical oxygen demand (COD) removal of 10 days running MFC increased by 58.7% showing simultaneously an increase in the cell voltage. However, this MFC technology faces practical barriers since it produces low electric energy. A power management system including the MFC, operational amplifier, solar photovoltaic panel and a boost DC/DC converter, was elaborated in this respect. The low voltage output obtained from the MFC, was thus substantially increased by the amplifier prior to polarization by a photovoltaic module with solar radiation. The amplified voltage was thus sufficiently enough and in consequence, utilized to feed a light emitting diode. The low output voltage 0.5 V was simply harvested, successfully boosted up to approximately 2 V (i.e. 4 times higher) and effectively harnessed as a power supply. This novel application is very interesting to utilize the natural bioenergy contained in wastes to supply small electronic devices.

Key findings

  • The COD removal of the MFC increased by 58.7% after 10 days.
  • The cell voltage increased simultaneously with the COD removal.
  • The power management system successfully boosted the voltage output from 0.5V to 2V.

Keywords

Renewable energyPhotovoltaic systemLow voltageVoltageBioenergyAmplifier

Identifiers

DOI
10.21203/rs.3.rs-1292398/v1
Journal
Research Square
Year
2022