A critical review of pretreatment technologies to enhance anaerobic digestion and energy recovery

M. R. Atelge, A. E. Atabani, J. Rajesh Banu, David Krisa, M. Kaya, Cigdem Eskicioglu, Gopalakrishnan Kumar, Changsoo Lee, Y. Yildiz, S. Unalan, R. Mohanasundaram, F. Duman

Research output: Contribution to journalArticlepeer-review

156 Citations (Scopus)


Biogas production from different waste resources still has limitations due to its complex structure and slowly biodegradable nature. To improve methane yield and anaerobic digestion performance, various substrate pretreatment methods have been suggested. This paper reviews the latest trends, progress, and research achievements about pretreatment technologies to improve anaerobic digestion efficiency. The pretreatment techniques are divided into four main groups which are physical, chemical, biological, and combined. The effect of inhibitor formation during the pretreatment process is discussed. The energy performance, economics, and environmental impact of these pretreatment technologies are revealed. This study concludes with future trends and emphasizes the necessity of pretreatment methods.

Original languageEnglish
Article number117494
Publication statusPublished - 2020 Jun 15

Bibliographical note

Funding Information:
The authors would like to acknowledge The Unit of Scientific Research Project Coordination (BAP) at Erciyes University, Kayseri, Turkey for the financial support under the University Project: FOA-2018-8183 (Priority Research Project).

Publisher Copyright:
© 2020 Elsevier Ltd

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry


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