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Anaerobic digestion is a pivotal waste-to-energy technology that converts organic waste into biogas, offering notable environmental and economic benefits. This research investigates the comparative efficacy of mono- and co-digestion processes involving cattle rumen content (CRC) and food waste (FW), providing insights into their potential for enhancing biogas production and supporting sustainable waste management. The substrates physicochemical properties were characterized, microbial communities analysed, and biogas production, TOC, and redox potential monitored for 40 days. FW had higher moisture (71.2%) and volatile solid content (89.3%) than CRC (68.4%). Co-digestion increased microbial diversity and resulted in higher biogas yields (16,205.81 mL/kgVS) compared to mono-digestion (CRC: 13,425.33 mL/kgVS, FW: 11,077.04 mL/kgVS). TOC decreased significantly from 32,280.8 to 9912.5 mg/kg for FW, 26,920.4 to 8143.3 mg/kg for CRC, and 29,600.6 to 2649.9 mg/kg during digestion, indicating organic matter degradation. Redox potential decreased from − 53.2 to − 190.7 mV for FW, − 130.4 to − 276.2 mV for CRC, and − 110.6 to − 308.4 mV for co-substrates, reflecting anaerobic conditions favourable for biogas production. Correlation analysis showed significant relationships between biogas production, TOC removal, and redox potential, highlighting the importance of substrate composition and microbial activity. This study provides insights for optimizing AD processes using CRC and FW, with implications for waste management, renewable energy generation, and greenhouse gas mitigation.

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A Comparative Analysis of Cattle Rumen Content and Anaerobic Mono-and Co-digestion of Food Waste with Evidence from Microbial Communities, Biogas Yield, and Redox Potential

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  • 发表日期：

    2025年

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  • Afeez Oladeji Amoo,
  • Ahmed Sabo,
  • Adamu Haruna,
  • Adeniyi Olarewaju Adeleye,
  • Nureni Babatunde Amoo,
  • Emmanuel Madu Ijanu,
  • Catherine Iyabo Asaju

摘要

Anaerobic digestion is a pivotal waste-to-energy technology that converts organic waste into biogas, offering notable environmental and economic benefits. This research investigates the comparative efficacy of mono- and co-digestion processes involving cattle rumen content (CRC) and food waste (FW), providing insights into their potential for enhancing biogas production and supporting sustainable waste management. The substrates physicochemical properties were characterized, microbial communities analysed, and biogas production, TOC, and redox potential monitored for 40 days. FW had higher moisture (71.2%) and volatile solid content (89.3%) than CRC (68.4%). Co-digestion increased microbial diversity and resulted in higher biogas yields (16,205.81 mL/kgVS) compared to mono-digestion (CRC: 13,425.33 mL/kgVS, FW: 11,077.04 mL/kgVS). TOC decreased significantly from 32,280.8 to 9912.5 mg/kg for FW, 26,920.4 to 8143.3 mg/kg for CRC, and 29,600.6 to 2649.9 mg/kg during digestion, indicating organic matter degradation. Redox potential decreased from − 53.2 to − 190.7 mV for FW, − 130.4 to − 276.2 mV for CRC, and − 110.6 to − 308.4 mV for co-substrates, reflecting anaerobic conditions favourable for biogas production. Correlation analysis showed significant relationships between biogas production, TOC removal, and redox potential, highlighting the importance of substrate composition and microbial activity. This study provides insights for optimizing AD processes using CRC and FW, with implications for waste management, renewable energy generation, and greenhouse gas mitigation.