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Sustainable Bioelectricity: Transformation of Chicha de Jora Waste into Renewable Energy

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  • Rojas-Flores Segundo

    (Institutos y Centros de Investigación de la Universidad Cesar Vallejo, Universidad Cesar Vallejo, Trujillo 13001, Peru
    Renewable Resources Nanotech Group, Universidad Cesar Vallejo, Trujillo 13001, Peru)

  • Cabanillas-Chirinos Luis

    (Institutos y Centros de Investigación de la Universidad Cesar Vallejo, Universidad Cesar Vallejo, Trujillo 13001, Peru
    Renewable Resources Nanotech Group, Universidad Cesar Vallejo, Trujillo 13001, Peru)

  • Nélida Milly Otiniano

    (Institutos y Centros de Investigación de la Universidad Cesar Vallejo, Universidad Cesar Vallejo, Trujillo 13001, Peru
    Renewable Resources Nanotech Group, Universidad Cesar Vallejo, Trujillo 13001, Peru)

  • Magaly De La Cruz-Noriega

    (Institutos y Centros de Investigación de la Universidad Cesar Vallejo, Universidad Cesar Vallejo, Trujillo 13001, Peru
    Renewable Resources Nanotech Group, Universidad Cesar Vallejo, Trujillo 13001, Peru)

Abstract

Corn is one of the most widely produced cereals worldwide, generating large amounts of waste, represents an environmental and economic challenge. In regions such as Africa and rural areas of Peru, access to electricity is limited, affecting quality of life and economic development. This study proposes using microbial fuel cells (MFCs) to convert chicha de jora waste—a traditional fermented beverage made from corn—into electrical energy. Single-chamber MFCs with activated carbon (anode) and zinc (cathode) electrodes were used. A total of 100 ml of chicha de jora waste was added in each MFC, and three MFCs were used in total. The MFCs demonstrated the viability of chicha de jora waste as a substrate for bioelectricity generation. Key findings include a notable peak in voltage (0.833 ± 0.041 V) and current (2.794 ± 0.241 mA) on day 14, with a maximum power density of 5.651 ± 0.817 mW/cm 2 . The pH increased from 3.689 ± 0.001 to 5.407 ± 0.071, indicating microorganisms’ degradation of organic acids. Electrical conductivity rose from 43.647 ± 1.025 mS/cm to 186.474 ± 6.517 mS/cm, suggesting ion release due to microbial activity. Chemical oxygen demand (COD) decreased from 957.32 ± 5.18 mg/L to 251.62 ± 61.15 mg/L by day 18, showing efficient degradation of organic matter. Oxidation-reduction potential (ORP) increased, reaching a maximum of 115.891 ± 4.918 mV on day 14, indicating more oxidizing conditions due to electrogenic microbial activity. Metagenomic analysis revealed Bacteroidota (48.47%) and Proteobacteria (29.83%) as the predominant phyla. This research demonstrates the potential of chicha de jora waste for bioelectricity generation in MFCs, offering a sustainable method for waste management and renewable energy production. Implementing MFC technology can reduce environmental pollution caused by corn waste and provide alternative energy sources for regions with limited access to electricity.

Suggested Citation

  • Rojas-Flores Segundo & Cabanillas-Chirinos Luis & Nélida Milly Otiniano & Magaly De La Cruz-Noriega, 2025. "Sustainable Bioelectricity: Transformation of Chicha de Jora Waste into Renewable Energy," Sustainability, MDPI, vol. 17(10), pages 1-13, May.
    • Handle: RePEc:gam:jsusta:v:17:y:2025:i:10:p:4499-:d:1656390
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    References listed on IDEAS

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