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The growing volume of waste produced by agro-industries and food processing facilities is a significant societal challenge. Beyond public health risks, this waste exacerbates the climate crisis due to its potential for generating greenhouse gas emissions (GHG). As a solution, utilizing agro-industrial waste for bioenergy production offers a more sustainable approach. In this study, the biochemical methane potential (BMP) of multiple wastes was assessed, including three types of sludges from meat and beverage processing units (L1, L2, and L3). In mono-digestion, the L3 substrate exhibited the highest BMP, reaching 316 NmL CH4/g of volatile solids (VS). Through co-digestion (AcoD), different binary and ternary mixtures were tested, yielding methane production between 200 and 358 NmL CH4/g VS. The co-digestion performance index (CPI) ranged from 0.9 to 1.4. This demonstrates that some substrate combinations enhance biogas production. In particular, higher methane yields were observed for mixtures of L2 and L3 (e.g. 0.5L2;0.5L3). Considering that the waste generation flows are uniform throughout the year, the results suggest that it would be possible to manage L1, L2, and L3 streams through AcoD with a production of 268 NmL CH4/g VS. Thus, in addition to managing and valorizing multiple waste streams, this approach can enhance revenues and contribute to GHG mitigation.

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Anaerobic Co-digestion for Managing Multiple Industrial Agro-residues While Generating Energy

  • 会议论文

  • 发表日期：

    2026年

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  • Patrícia Almeida,
  • João Luís,
  • Margarida Quina,
  • Eva Domingues

摘要

The growing volume of waste produced by agro-industries and food processing facilities is a significant societal challenge. Beyond public health risks, this waste exacerbates the climate crisis due to its potential for generating greenhouse gas emissions (GHG). As a solution, utilizing agro-industrial waste for bioenergy production offers a more sustainable approach. In this study, the biochemical methane potential (BMP) of multiple wastes was assessed, including three types of sludges from meat and beverage processing units (L1, L2, and L3). In mono-digestion, the L3 substrate exhibited the highest BMP, reaching 316 NmL CH4/g of volatile solids (VS). Through co-digestion (AcoD), different binary and ternary mixtures were tested, yielding methane production between 200 and 358 NmL CH4/g VS. The co-digestion performance index (CPI) ranged from 0.9 to 1.4. This demonstrates that some substrate combinations enhance biogas production. In particular, higher methane yields were observed for mixtures of L2 and L3 (e.g. 0.5L2;0.5L3). Considering that the waste generation flows are uniform throughout the year, the results suggest that it would be possible to manage L1, L2, and L3 streams through AcoD with a production of 268 NmL CH4/g VS. Thus, in addition to managing and valorizing multiple waste streams, this approach can enhance revenues and contribute to GHG mitigation.