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<p>This study investigates the anaerobic digestion of Moroccan green tea waste in a laboratory-scale continuous stirred tank reactor (CSTR) operated in batch mode under mesophilic conditions (37&#xa0;°C). Given the large consumption of green tea and the environmental risks associated with improper disposal of spent tea leaves, this work aims to evaluate methane production and the biodegradability of this organic waste. A one-liter CSTR was used, and the methane output was measured thrice daily. After 20&#xa0;days, the maximum cumulative methane production reached 405 ± 20&#xa0;Nml, with a specific yield of 70.98 ± 3.55&#xa0;Nml/g VS added and a biodegradability of 31.92 ± 1.60%. The process was monitored within a pH range of 6.82–8.08. Kinetic modeling using the modified Gompertz and transfer function equations showed strong agreement with experimental data (R<sup>2</sup> = 0.9946 and 0.9872, respectively). The results confirm the potential of green tea waste as a feedstock for biogas production.</p> Graphical abstract <p></p>

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Anaerobic Digestion of Moroccan Green Tea Waste Under Mesophilic Conditions: Methane Yield, Biodegradability, and Kinetic Modeling

  • 期刊论文

  • 发表日期：

    2025年12月16日

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  • Sanae Habchi,
  • Ismail Boukabou,
  • Brahim Sallek,
  • Malinee Sriariyanun,
  • Hassan El Bari

摘要

This study investigates the anaerobic digestion of Moroccan green tea waste in a laboratory-scale continuous stirred tank reactor (CSTR) operated in batch mode under mesophilic conditions (37 °C). Given the large consumption of green tea and the environmental risks associated with improper disposal of spent tea leaves, this work aims to evaluate methane production and the biodegradability of this organic waste. A one-liter CSTR was used, and the methane output was measured thrice daily. After 20 days, the maximum cumulative methane production reached 405 ± 20 Nml, with a specific yield of 70.98 ± 3.55 Nml/g VS added and a biodegradability of 31.92 ± 1.60%. The process was monitored within a pH range of 6.82–8.08. Kinetic modeling using the modified Gompertz and transfer function equations showed strong agreement with experimental data (R2 = 0.9946 and 0.9872, respectively). The results confirm the potential of green tea waste as a feedstock for biogas production.

Graphical abstract