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

[Display omitted] •Pretreatments are important in a combined biorefinery aspect with different waste resources.•Components of substrates are taken in account to improve pretreatment efficiency.•Combined pretreatment is a suitable solution to improve the digestibility.•Biogas yield and energy balance...

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Bibliographic Details
Published in:Fuel (Guildford) 2020-06, Vol.270, p.117494, Article 117494
Main Authors: Atelge, M.R., Atabani, A.E., Banu, J. Rajesh, Krisa, David, Kaya, M., Eskicioglu, Cigdem, Kumar, Gopalakrishnan, Lee, Changsoo, Yildiz, Y.Ş., Unalan, S., Mohanasundaram, R., Duman, F.
Format: Article
Language:English
Subjects:
Anaerobic digestion
Biodegradability
Biodegradation
Bioenergy
Biogas
Economic conditions
Economic impact
Energy recovery
Environmental impact
Impact analysis
Pretreatment
Recycling of waste
Refuse as fuel
Substrates
Trends
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Summary:[Display omitted] •Pretreatments are important in a combined biorefinery aspect with different waste resources.•Components of substrates are taken in account to improve pretreatment efficiency.•Combined pretreatment is a suitable solution to improve the digestibility.•Biogas yield and energy balance should be considered for the effects of pretreatments. 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.
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2020.117494