Sustainable management and recycling of food waste anaerobic digestate: A review

Shanta Dutta, Mingjing He, Xinni Xiong, Daniel C.W. Tsang

Research output: Journal article publicationReview articleAcademic researchpeer-review

140 Citations (Scopus)


Anaerobic digestion (AD) is a widely used technology to valorise food waste for biogas production yet a considerable amount of digestate remains under-utilised. Sustainable management and recycling of the nutrient-rich food waste anaerobic digestate (FWD) is highly desirable for closing resource loop and actualising circular economy. This work reviews the distinct properties of FWD and the existing treatment technologies. FWD shows great prospects as a nutrient source for microalgal cultivation and biofuel production. Emerging technologies such as thermal conversion (e.g., pyrolysis and hydrothermal treatment) of FWD into value-added products such as functionalised biochar/hydrochar with diverse applications would be attractive and warrant further research investigation. Integrated AD with subsequent valorisation facilities is highly encouraged to achieve complete utilisation of resources and reduce carbon emissions.

Original languageEnglish
Article number125915
JournalBioresource Technology
Publication statusPublished - Dec 2021


  • Bioenergy recovery
  • Engineered biochar
  • Hydrochar production
  • Hydrothermal carbonisation
  • Pyrolysis

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal


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