Combination of dry milling and separation processes with anaerobic digestion of olive mill solid waste: methane production and energy efficiency - Archive ouverte HAL
Article Dans Une Revue Molecules Année : 2018

Combination of dry milling and separation processes with anaerobic digestion of olive mill solid waste: methane production and energy efficiency

Résumé

This experimental work aims at investigating the effects of milling; sieving; and electrostatic separation on the biochemical methane potential of two olive pomaces from traditional olive oil extraction (M) and from a three-phase system (T). Sieving proved to be efficient for increasing the soluble chemical oxygen demand in the smallest fractions of the sieve of both M (62%) and T (78%) samples. The positive fraction following electrostatic separation also enhanced chemical oxygen demand (COD) solubilisation by 94%, in comparison to sample T milled at 4 mm. Sieve fractions with a size greater than 0.9 mm contained 33% and 47% less lipids for the M and T biomasses; respectively. Dry fractionation modified sample properties as well as lipid and fiber distribution. Concomitantly; milling increased the accessibility and facilitated the release of organic matter. The energy balance was positive after knife milling and sieving; while ball milling and ultrafine milling proved to be inefficient.
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hal-02154402 , version 1 (26-05-2020)

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Doha Elalami, Hélène Carrère, Karima Abdelouahdi, Abdallah Oukarroum, Driss Dhiba, et al.. Combination of dry milling and separation processes with anaerobic digestion of olive mill solid waste: methane production and energy efficiency. Molecules, 2018, 23 (12), ⟨10.3390/molecules23123295⟩. ⟨hal-02154402⟩
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