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Dynamic effect of total solid content, low substrate/inoculum ratio and particle size on solid-state anaerobic digestion

Abstract : Among all the process parameters of solid-state anaerobic digestion (SS-AD), total solid content (TS), inoculation (S/X ratio) and size of the organic solid particles can be optimized to improve methane yield and process stability. To evaluate the effects of each parameter and their interactions on methane production, a three level Box-Behnken experimental design was implemented in SS-AD batch tests degrading wheat straw by adjusting: TS content from 15% to 25%, S/X ratio (in volatile solids) between 28 and 47 and particle size with a mean diameter ranging from 0.1 to 1.4 mm. A dynamic analysis of the methane production indicates that the S/X ratio has only an effect during the start-up phase of the SS-AD. During the growing phase, TS content becomes the main parameter governing the methane production and its strong interaction with the particle size suggests the important role of water compartmentation on SS-AD. (C) 2013 Elsevier Ltd. All rights reserved.
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https://hal.inrae.fr/hal-02652212
Contributor : Migration Prodinra <>
Submitted on : Friday, May 29, 2020 - 6:35:20 PM
Last modification on : Friday, February 5, 2021 - 4:03:03 AM

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Jean-Charles Motte, Renaud Escudie, Nicolas Bernet, Jean-Philippe Delgenès, Jean-Philippe Steyer, et al.. Dynamic effect of total solid content, low substrate/inoculum ratio and particle size on solid-state anaerobic digestion. Bioresource Technology, Elsevier, 2013, 144, pp.141 - 148. ⟨10.1016/j.biortech.2013.06.057⟩. ⟨hal-02652212⟩

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