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Review of feedstock pretreatment strategies for improved anaerobic digestion: From lab-scale research to full-scale application

Abstract : When properly designed, pretreatments may enhance the methane potential and/or anaerobic digestion rate, improving digester performance. This paper aims at providing some guidelines on the most appropriate pretreatments for the main feedstocks of biogas plants. Waste activated sludge was firstly investigated and implemented at full-scale, its thermal pretreatment with steam explosion being most recommended as it increases the methane potential and digestion rate, ensures sludge sanitation and the heat needed is produced on-site. Regarding fatty residues, saponification is preferred for enhancing their solubilisation and bioavailability. In the case of animal by-products, this pretreatment can be optimised to ensure sterilisation, solubilisation and to reduce inhibition linked to long chain fatty acids. With regards to lignocellulosic biomass, the first goal should be delignification, followed by hemicellulose and cellulose hydrolysis, alkali or biological (fungi) pretreatments being most promising. As far as microalgae are concerned, thermal pretreatment seems the most promising technique so far.
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https://hal.inrae.fr/hal-02640339
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Submitted on : Thursday, May 28, 2020 - 2:26:42 PM
Last modification on : Wednesday, March 23, 2022 - 12:08:19 PM

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Hélène Carrère, Georgia Antonopoulou, Rim Affes, Fabiana Passos, Audrey Battimelli, et al.. Review of feedstock pretreatment strategies for improved anaerobic digestion: From lab-scale research to full-scale application. Bioresource Technology, Elsevier, 2016, 199, pp.386-397. ⟨10.1016/j.biortech.2015.09.007⟩. ⟨hal-02640339⟩

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