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<p>The increasing global energy demand, driven by urbanization and population growth, has intensified waste generation and dependence on fossil fuels, exacerbating climate change. This study investigates the performance of anaerobic digestion (AD) in converting organic waste into biogas and nutrient-rich digestate, with a focus on key operational parameters: pH, temperature, organic loading rate (OLR), particle size (PS), carbon-to-nitrogen ratio (C/N), hydraulic retention time (HRT), moisture content (MC), and the stages of microbial conversion. Laboratory-scale experiments demonstrated that maintaining a pH range of 6.8–7.2, mesophilic temperatures (35–37&#xa0;°C), and a C/N ratio between 20 and 30 significantly improved methane yield. Co-digestion strategies and electromagnetic field stimulation enhanced biogas production by up to 25%, addressing common issues of low methane content and process instability. The study concludes that optimizing substrate composition and reactor design can substantially increase AD efficiency, making it a viable technology for sustainable energy generation and waste management.</p>

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Advancements in anaerobic digestion of organic waste for sustainable biogas production

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • Naeemah A. Ibrahim,
  • Halah H. Majeed,
  • Thaer A. Jwaid,
  • Kiman Silas

摘要

The increasing global energy demand, driven by urbanization and population growth, has intensified waste generation and dependence on fossil fuels, exacerbating climate change. This study investigates the performance of anaerobic digestion (AD) in converting organic waste into biogas and nutrient-rich digestate, with a focus on key operational parameters: pH, temperature, organic loading rate (OLR), particle size (PS), carbon-to-nitrogen ratio (C/N), hydraulic retention time (HRT), moisture content (MC), and the stages of microbial conversion. Laboratory-scale experiments demonstrated that maintaining a pH range of 6.8–7.2, mesophilic temperatures (35–37 °C), and a C/N ratio between 20 and 30 significantly improved methane yield. Co-digestion strategies and electromagnetic field stimulation enhanced biogas production by up to 25%, addressing common issues of low methane content and process instability. The study concludes that optimizing substrate composition and reactor design can substantially increase AD efficiency, making it a viable technology for sustainable energy generation and waste management.