Anaerobic digestate valorization beyond agricultural application: Current status and prospects

Wei Wang, Jo Shu Chang, Duu Jong Lee

Research output: Contribution to journalReview articlepeer-review

15 Citations (Scopus)

Abstract

The flourishment of anaerobic digestion emphasizes the importance of digestate valorization, which is essential in determining the benefits of the anaerobic digestion process. Recently the perception of digestate gradually shifted from waste to products to realize the concept of circular economy and maximize the benefits of digestate valorization. Land application of digestate should be the simplest way for digestate valorization, while legislation restriction and environmental issues emphasize the necessity of novel valorization methods. This review then outlined the current methods for solid/liquid digestate valorization, nutrient recovery, microalgae cultivation, and integration with biological and thermochemical processes. The novel valorization routes proposed were summarized, with their challenges and prospects being discussed. Integrating anaerobic digestion with thermochemical methods such as hydrothermal carbonization should be a promising strategy due to the potential market value of hydrochar/biochar-derived products.

Original languageEnglish
Article number128742
JournalBioresource technology
Volume373
DOIs
Publication statusPublished - 2023 Apr

All Science Journal Classification (ASJC) codes

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

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