Anaerobic co-digestion of agricultural wastes toward circular bioeconomy

Shu Yuan Pan, Cheng Yen Tsai, Chen Wuing Liu, Sheng Wei Wang, Hyunook Kim, Chihhao Fan

Research output: Contribution to journalReview articlepeer-review

56 Scopus citations


A huge amount of agricultural wastes and waste activated-sludge are being generated every year around the world. Anaerobic co-digestion (AcD) has been considered as an alternative for the utilization of organic matters from such organic wastes by producing bioenergy and biochemicals to realize a circular bioeconomy. Despite recent advancement in AcD processes, the effect of feedstock compositions and operating conditions on the biomethane production processe has not been critically explored. In this paper, we have reviewed the effects of feedstock (organic wastes) characteristics, including particle size, carbon-to-nitrogen ratio, and pretreatment options, on the performance of an anaerobic digestion process. In addition, we provided an overview of the effect of key control parameters, including retention time, temperature, pH of digestate, volatile fatty acids content, total solids content, and organic loading rate. Lastly, based on the findings from the literature, we have presented several perspectives and prospects on priority research to promote AcD to a steppingstone for a circular bioeconomy.

Original languageEnglish
Article number102704
Issue number7
StatePublished - 23 Jul 2021


  • Applied microbiology
  • Biotechnology
  • Chemical engineering
  • Microbiology
  • Sustainability aspects of food production


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