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Leveraging Potato Chip Industry Residues: Bioenergy Production and Greenhouse Gas Mitigation

Author

Listed:
  • Patrícia V. Almeida

    (Chemical Engineering and Renewable Resources for Sustainability (CERES), Department of Chemical Engineering, University of Coimbra, 3030-790 Coimbra, Portugal)

  • Luís M. Castro

    (Chemical Engineering and Renewable Resources for Sustainability (CERES), Department of Chemical Engineering, University of Coimbra, 3030-790 Coimbra, Portugal
    Research Center for Natural Resources, Environment and Society (CERNAS), Polytechnic University of Coimbra, Bencanta, 3045-601 Coimbra, Portugal)

  • Anna Klepacz-Smółka

    (Faculty of Process and Environmental Engineering, Lodz University of Technology, Wolczanska 213, 90-924 Lodz, Poland)

  • Licínio M. Gando-Ferreira

    (Chemical Engineering and Renewable Resources for Sustainability (CERES), Department of Chemical Engineering, University of Coimbra, 3030-790 Coimbra, Portugal)

  • Margarida J. Quina

    (Chemical Engineering and Renewable Resources for Sustainability (CERES), Department of Chemical Engineering, University of Coimbra, 3030-790 Coimbra, Portugal)

Abstract

Anaerobic digestion (AD) offers a sustainable solution by treating biodegradable waste while recovering bioenergy, enhancing the share of renewable energy. Thus, this study aims to investigate the AD for managing and valorizing residues from the potato chip industry: potato peel (PP), potato offcuts (OC), waste cooking oil (WCO), wastewater (WW), and sewage sludge (SS). In particular, the biochemical methane potential (BMP) of each residue, anaerobic co-digestion (AcoD), and greenhouse gas (GHG) emissions of an AD plant are assessed. WW, OC, and SS present a BMP of around 232–280 NmL CH4 /kg of volatile solids (VS). PP and WCO reach a BMP slightly lower than the former substrates (174–202 NmL CH4 /g VS ). AcoD results in methane yields between 150 and 250 NmL CH4 /g VS . An up-scaled anaerobic digester is designed to manage 1.60 Mg/d of PP. A residence time of 12 days and a digester with 165 m 3 is estimated, yielding 14 Nm 3 CH4 /Mg VS /d. A simulated AD plant integrated with a combined heat and power unit results in a carbon footprint of 542 kg of CO 2 -eq/Mg db PP, primarily from biogenic GHG emissions. These findings highlight the potential of AD to generate renewable energy from potato industry residues while reducing fossil fuel-related GHG emissions and promoting resource circularity.

Suggested Citation

  • Patrícia V. Almeida & Luís M. Castro & Anna Klepacz-Smółka & Licínio M. Gando-Ferreira & Margarida J. Quina, 2025. "Leveraging Potato Chip Industry Residues: Bioenergy Production and Greenhouse Gas Mitigation," Sustainability, MDPI, vol. 17(11), pages 1-17, May.
    • Handle: RePEc:gam:jsusta:v:17:y:2025:i:11:p:5023-:d:1668377
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    References listed on IDEAS

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