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<p>This study investigated the effect of harvesting time and using the co-digestion strategy on the digestibility of <i>Phragmites australis</i> biomass and methane production. The <i>P. australis</i> biomass harvested from summer, autumn, and winter was digested singly (mono-digestion) and combined with synthetic food waste (co-digestion) at an inoculum to substrate ratio 1:1 based on the volatile solid content of inoculum and substrate and under mesophilic conditions (37 ± 1&#xa0;°C). The results found that cumulative methane production was low during mono-digestion of summer, autumn, and winter <i>P. australis</i> (36.26 ± 4.48, 35.59 ± 3.08, and 34.90 ± 4.40 mL/g VS added, respectively) due to the effect of lignin on the biodigestibility of <i>P. australis</i>. This issue was addressed by co-digestion of <i>P. australis</i> biomass from these three seasons with synthetic food waste, which resulted in an increase in cumulative methane production (135.66 ± 1.14, 137.33 ± 3.21, and 123.94 ± 1.01 mL/g VS added, respectively).</p>

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Biogas Production from Anaerobic Digestion of Phragmites australis: Influence of Grinding Process, Harvesting Season and Co-digestion with Food Waste

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月6日

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  • Ahmed R. Al-Iraqi,
  • Bhushan P. Gandhi,
  • Andrew M. Folkard,
  • Philip A. Barker,
  • Kirk T. Semple

摘要

This study investigated the effect of harvesting time and using the co-digestion strategy on the digestibility of Phragmites australis biomass and methane production. The P. australis biomass harvested from summer, autumn, and winter was digested singly (mono-digestion) and combined with synthetic food waste (co-digestion) at an inoculum to substrate ratio 1:1 based on the volatile solid content of inoculum and substrate and under mesophilic conditions (37 ± 1 °C). The results found that cumulative methane production was low during mono-digestion of summer, autumn, and winter P. australis (36.26 ± 4.48, 35.59 ± 3.08, and 34.90 ± 4.40 mL/g VS added, respectively) due to the effect of lignin on the biodigestibility of P. australis. This issue was addressed by co-digestion of P. australis biomass from these three seasons with synthetic food waste, which resulted in an increase in cumulative methane production (135.66 ± 1.14, 137.33 ± 3.21, and 123.94 ± 1.01 mL/g VS added, respectively).