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Influence of particlesize and chemicalcomposition on the performance and kinetics of anaerobicdigestionprocess of sunfloweroilcake in batchmode

AuthorsRubia, M. Ángeles de la ; Fernández-Cegrí, Victoria ; Raposo Bejines, Francisco ; Borja Padilla, Rafael
KeywordsBatch assay
Biochemical methane potential (BMP)
Particle size
Sunflower oil cake (SuOC)
Issue Date15-Dec-2011
CitationBiochemical Engineering Journal 58-59: 162-167 (2011)
AbstractBiochemical methane potential (BMP) assays of sunfloweroilcake (SuOC) were carried out to research the effect of different particlesizes and their chemicalcomposition on methane yields and kinetics. Particlesize ranges of (1) 0.355–0.55 mm, (2) 0.710–1.0 mm and (3) 1.4–2.0 mm in diameter were evaluated. The highest methane yield 213 ± 8 mL CH4 g−1 VSadded was obtained for the largest particlesize analyzed (3), against 186 ± 6 mL CH4 g−1 VSadded obtained for particles 1 and 2. This may be attributed to the different lignocellulose compositions of the various particlesize ranges studied and to organic matter removals (47.2% for 3, against ∼41.5% for 1 and 2). The evolution of propionic acid concentration was found to be fundamental for explaining the lowest rate of biogas production for the smallest (1) particlesize studied, with a specific rate constant k of 0.45 ± 0.02 d−1, while values of 0.61 ± 0.02 d−1 and 0.50 ± 0.01 d−1 were obtained for particles 2 and 3, respectively.
Publisher version (URL)http://dx.doi.org/10.1016/j.bej.2011.09.010
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