Obtaining Sustainable Electrical Energy from Pepper Waste

Segundo, Rojas-Flores; Magaly, De; Luis, Cabanillas-Chirinos; Otiniano, Nélida; Soto-Deza, Nancy; Terrones-Rodriguez, Nicole; Mayra, De

doi:10.3390/su16083448

Cited by 3 publications

(1 citation statement)

References 73 publications

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“…Due to this, many cities with this problem have decided to generate and obtain other sustainable and renewable energy [6]. For example, in 1990, no one used bioenergy as a source to obtain electricity; however, in 2022, there are reports that it produced 675.11 TWh of electrical energy according to the Energy Institute's Statistical Review of World Energy (2023) [7].…”

Section: Introductionmentioning

confidence: 99%

Potential Use of Andean Tuber Waste for the Generation of Environmentally Sustainable Bioelectricity

Rojas-Flores,

De La Cruz-Noriega,

Cabanillas-Chirinos

et al. 2024

Molecules

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The growing demand for agricultural products has increased exponentially, causing their waste to increase and become a problem for society. Searching for sustainable solutions for organic waste management is increasingly urgent. This research focuses on considering the waste of an Andean tuber, such as Olluco, as a fuel source for generating electricity and becoming a potential sustainable energy source for companies dedicated to this area. This research used Olluco waste as fuel in single-chamber microbial fuel cells using carbon and zinc electrodes. An electric current and electric potential of 6.4 ± 0.4 mA and 0.99 ± 0.09 V were generated, operating with an electrical conductivity of 142.3 ± 6.1 mS/cm and a pH of 7.1 ± 0.2. It was possible to obtain a 94% decrease in COD and an internal resistance of 24.9 ± 2.8 Ω. The power density found was 373.8 ± 28.8 mW/cm2 and the current density was 4.96 A/cm2. On day 14, the cells were connected in earnest, achieving a power of 2.92 V and generating enough current to light an LED light bulb, thus demonstrating the potential that Olluco waste has to be used as fuel in microbial fuel cells.

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Section: Introductionmentioning

confidence: 99%

Potential Use of Andean Tuber Waste for the Generation of Environmentally Sustainable Bioelectricity

Rojas-Flores,

De La Cruz-Noriega,

Cabanillas-Chirinos

et al. 2024

Molecules

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Bio-Power Generation in Microbial Fuel Cell with Vermicompost Using Eisenia foetida

Solares Basurto,

Pérez Ruiz,

Luján Vega

et al. 2024

Eng

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This research emphasizes the effect of using Eisenia foetida in vermicompost for power generation in microbial fuel cells (MFCs). By accelerating the organic decomposition, the bioenergy generation is improved. A vermicompost-microbial fuel cell employing electrogenic microorganisms was used to convert chemical energy into electrical energy. In this work, substrates of black soil, tree bark, leaves, eggshells, and ground tomatoes were used. The vermicompost MFC has a copper cathode and a stainless steel anode. In this study, the performance of MFCs was evaluated using different numbers of Eisenia foetida specimens, with three specimens (MFCW3), five specimens (MFCW5), and seven specimens (MFCW7). Our key findings show that by increasing the number of Eisenia foetida specimens does not bring higher power densities; as a result, the best power density was observed in MFCW3 and MFCW5 at the end of the fourth week, both presenting a total of five Eisenia foetida specimens with a power density of 192 mW m−2. Therefore, optimal results were found when 330 g of substrate and five Eisenia foetida specimens were used to achieve a maximum current density of 900 mW m−2 and a maximum power density of 192 mW m−2. This type of microbial fuel cell can be considered as an alternative for power generation with a significantly reduced environmental impact, considering the use of organic waste. It can be considered a game-changer in waste management and bioenergy projects.

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Sustainable Use of the Fungus Aspergillus sp. to Simultaneously Generate Electricity and Reduce Plastic through Microbial Fuel Cells

Rojas-Flores,

De La Cruz-Noriega,

Otiniano

et al. 2024

Sustainability

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The improper disposal of plastic waste has become a significant problem, with only a small amount recycled and the rest ending up in landfills or being burned, leading to environmental pollution. In addition, the cost of electric energy has risen by over 100% in the last 20 years, making it unaffordable for remote areas to access this service due to high installation costs, leaving people living far from major cities without electricity. This study proposes an innovative solution to these issues using microbial fuel cell (MFC) technology to simultaneously reduce plastic waste and generate electric energy by utilizing the fungus Aspergillus sp. As a substrate for 45 days. The MFCs reached maximum values of 0.572 ± 0.024 V and 3.608 ± 0.249 mA of voltage and electric current on the thirty-first day, with the substrate operating at a pH of 6.57 ± 0.27 and an electrical conductivity of 257.12 ± 20.9 mS/cm. Furthermore, it was possible to reduce the chemical oxygen demand by 73.77% over the 45 days of MFC operation, while the recorded internal resistance was 27.417 ± 9.810 Ω, indicating a power density of 0.124 ± 0.006 mW/cm2. The initial and final transmittance spectra, obtained using FTIR (Fourier Transform Infrared), showed the characteristic peaks of polyethylene (plastic), with a noticeable reduction in the final spectrum, particularly in the vibration of the C-H compound. After 45 days of fungus operation, the plastic surface used as a sample exhibited perforations and cracks, resulting in a thickness reduction of 313.56 µm. This research represents an initial step in using fungi for plastic reduction and electric energy generation in an alternative and sustainable manner.

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Obtaining Sustainable Electrical Energy from Pepper Waste

Cited by 3 publications

References 73 publications

Potential Use of Andean Tuber Waste for the Generation of Environmentally Sustainable Bioelectricity

Potential Use of Andean Tuber Waste for the Generation of Environmentally Sustainable Bioelectricity

Bio-Power Generation in Microbial Fuel Cell with Vermicompost Using Eisenia foetida

Sustainable Use of the Fungus Aspergillus sp. to Simultaneously Generate Electricity and Reduce Plastic through Microbial Fuel Cells

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