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Effective management of the organic fraction of municipal solid waste, particularly food and garden organics (FOGO), is critical for reducing carbon emissions associated with landfill disposal. To support circular economy goals, there is a growing need to assess the bioenergy potential of source-separated FOGO under high-solids anaerobic digestion (AD) conditions. This study investigates the application of dry anaerobic digestion for actual source-separated municipal FOGO in a continuous stirred tank reactor with prime focus on rapid acclimation and process stability. During the start-up phase, the system exhibited a steady improvement in performance, with daily biogas production increasing from 840 to 4912 NmL/d and methane concentration rising from 24.1% to 55.3%. The gradual adjustment of OLR, along with stable pH, alkalinity, and total ammonical nitrogen, supported process stability and efficient methane generation, strengthening the efficiency of dry AD of FOGO using continuous operation.

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Dry Anaerobic Digestion of Municipal FOGO Waste: Reactor Acclimatisation and Bioenergy Potential in a Circular Economy Framework

  • 会议论文

  • 发表日期：

    2026年

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  • Ayesha Rafique,
  • Dharmappa Hagare,
  • Zuhaib Siddiqui

摘要

Effective management of the organic fraction of municipal solid waste, particularly food and garden organics (FOGO), is critical for reducing carbon emissions associated with landfill disposal. To support circular economy goals, there is a growing need to assess the bioenergy potential of source-separated FOGO under high-solids anaerobic digestion (AD) conditions. This study investigates the application of dry anaerobic digestion for actual source-separated municipal FOGO in a continuous stirred tank reactor with prime focus on rapid acclimation and process stability. During the start-up phase, the system exhibited a steady improvement in performance, with daily biogas production increasing from 840 to 4912 NmL/d and methane concentration rising from 24.1% to 55.3%. The gradual adjustment of OLR, along with stable pH, alkalinity, and total ammonical nitrogen, supported process stability and efficient methane generation, strengthening the efficiency of dry AD of FOGO using continuous operation.