Increase in Electrical Parameters Using Sucrose in Tomato Waste
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Date
2022-07-16Author(s)
Rojas-Flores, Segundo
De La Cruz-Noriega, Magaly
Benites, Santiago M.
Delfín-Narciso, Daniel
Angelats-Silva, Luis
Felix, Díaz
Cabanillas-Chirinos, Luis
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“The use of organic waste as fuel for energy generation will reduce the great environmental
problems currently caused by the consumption of fossil sources, giving agribusiness companies a
profitable way to use their waste. In this research, tomato waste with different percentages of sucrose
(0-target, 5, 10, and 20%) was used in microbial fuel cells manufactured on a laboratory scale with zinc
and copper electrodes, managing to generate maximum peaks of voltage and a current of 1.08 V and
6.67 mA in the cell with 20% sucrose, in which it was observed that the optimum operating pH was
5.29, while the MFC with 0% (target) sucrose generated 0.91 V and 3.12 A on day 13 with a similar
pH, even though all the cells worked in an acidic pH. Likewise, the cell with 20% sucrose had the
lowest internal resistance (0.148541 ± 0.012361 KΩ) and the highest power density (224.77 mW/cm2
)
at a current density of 4.43 mA/cm2
, while the MFC with 0% sucrose generated 160.52 mW/cm2
and 4.38 mA/cm2 of power density and current density, respectively, with an internal resistance of
0.34116 ± 0.2914 KΩ. In this sense, the FTIR (Fourier-transform infrared spectroscopy) of all the
substrates used showed a high content of phenolic compounds and carboxylate acids. Finally, the
MFCs were connected in a series and managed to generate a voltage of 3.43 V, enough to light an
LED (green). These results give great hope to companies and society that, in the near future, this
technology can be taken to a larger scale.“
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