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Microbial fuel cells were used to treat cassava fermentation wastewater, with optimal concentrations of 20% v/v and 0.16-0.33 g/L urea addition for electricity production.

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What they did

System
MFC

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Abstract

Microbial fuel cell is a new technology that utilizes bacteria as biochemicals to convert energy stored in organic/inorganic compounds, which is easily degraded into electrical energy. Apart from being able to produce electrical energy, the implementation of this technology can help solve the problem of processing wastewater resulting from cassava fermentation. The specific aim of the research is to examine the effect of cassava fermentation wastewater concentration and the effect of urea addition on the productivity of electricity produced and the reduction in the quality of cassava fermentation wastewater. From the research results, it can be concluded that the higher the cassava fermentation wastewater concentration, the smaller the electrical energy produced. The optimum initial cassava fermentation wastewater concentration is 20% v/v, with an average volumetric power density produced of 58.56 W/m³. The higher the concentration of added urea, the smaller the electrical energy produced. The optimum concentration of urea addition is 0.16-0.33 g/L. There is a linear relationship between the electricity produced and the decrease in total suspended solid (TSS) and total dissolved solid (TDS). The higher the electricity produced, indicating high bacterial activity, will cause a decrease in TSS and TDS.

Key findings

  • Higher cassava fermentation wastewater concentration resulted in lower electrical energy production.
  • Optimal initial cassava fermentation wastewater concentration was 20% v/v, producing an average volumetric power density of 58.56 W/m³.
  • Higher urea concentration resulted in lower electrical energy production.

Keywords

Microbial fuel cellWastewaterFermentationSewage treatmentWaste managementPulp and paper industry

Identifiers

DOI
10.1615/interjenercleanenv.2024051023
Journal
International Journal of Energy for a Clean Environment
Year
2023