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Elephant grass (Pennisetum purpureum) is a lignocellulosic biomass that grows quickly and has a great potential for anaerobic digestion to produce biogas. Based on physicochemical characterization, this study evaluates its theoretical biochemical methane potential (BMPth). Atomic ratios, lignocellulosic composition, proximate and ultimate analyses, and organic fraction determination were used to evaluate samples that were gathered in Kumasi, Ghana. The findings revealed a moderate ash concentration (7.28%), high volatile matter (81.56%), and low moisture content (10.14%). The biomass showed low lignin (4.17%) and high cellulose (32.81%) and hemicellulose (24.72%) contents, indicating good biodegradability. The organic fraction, elemental composition, and chemical oxygen demand methods yielded theoretical BMP values of 348.79, 711.49-, and 59.22-ml CH₄/g VS, respectively. Elephant grass is a viable and sustainable feedstock for the synthesis of biomethane, even if its high C/N ratio necessitates co-digestion.

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Assessment of the Bioenergy Potential of Elephant Grass for Anaerobic Digestion in Ghana

  • 章节

  • 发表日期：

    2026年

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  • James Darmey,
  • Satyanarayana Narra,
  • Osei-Wusu Achaw,
  • Walter Stinner,
  • Julius Cudjoe Ahiekpor,
  • Livine Carline Kepseu Yepmou,
  • Philip Allan Barnes,
  • Raphael Osei Asante

摘要

Elephant grass (Pennisetum purpureum) is a lignocellulosic biomass that grows quickly and has a great potential for anaerobic digestion to produce biogas. Based on physicochemical characterization, this study evaluates its theoretical biochemical methane potential (BMPth). Atomic ratios, lignocellulosic composition, proximate and ultimate analyses, and organic fraction determination were used to evaluate samples that were gathered in Kumasi, Ghana. The findings revealed a moderate ash concentration (7.28%), high volatile matter (81.56%), and low moisture content (10.14%). The biomass showed low lignin (4.17%) and high cellulose (32.81%) and hemicellulose (24.72%) contents, indicating good biodegradability. The organic fraction, elemental composition, and chemical oxygen demand methods yielded theoretical BMP values of 348.79, 711.49-, and 59.22-ml CH₄/g VS, respectively. Elephant grass is a viable and sustainable feedstock for the synthesis of biomethane, even if its high C/N ratio necessitates co-digestion.