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Pretreatment of food waste for methane and hydrogen recovery: A review

Abstract : Food waste (FW) management by biological process is more attractive and eco-friendly approach than thermo-chemical conversion or landfilling. However, FW composition and physico-chemical and biological characteristics affect the overall biological process in terms of product yield and degradation rate. To overcome this major bottle-neck, the pretreatment of FW is proposed. Therefore this review aims to provide a comprehensive summary of the importance of pretreatment of FW with respect to FW management by anaerobic digestion (AD) and dark fermentation (DF). It also reviews the existing knowledge gaps and future research perspectives for better integration of FW pretreatments for AD and DF, which should include (i) the preservation of carbon mass through freeze and thaw, or drying; and (ii) improve the carbon accessibility through particle size reduction and thermal pretreatments for high-rate bioenergy recovery.
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O. P. Karthikeyan, Eric Trably, S. Mehariya, Nicolas Bernet, J. W. C. Wong, et al.. Pretreatment of food waste for methane and hydrogen recovery: A review. Bioresource Technology, Elsevier, 2018, 249, pp.1025-1039. ⟨10.1016/j.biortech.2017.09.105⟩. ⟨hal-02626205⟩

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