Combination of Dry Milling and Separation Processes with Anaerobic Digestion of Olive Mill Solid Waste: Methane Production and Energy Efficiency

Molecules

Abdellatif Barakat¹  Doha Elalami²  Hélène Carrère²  Karima Abdelouahdi³  Abdallah Oukarroum⁴  Driss Dhiba⁴  Mohamed Arji⁵ 

[1] IATE, CIRAD, Montpellier SupAgro, INRA, Université de Montpellier, 34060 Montpellier, France;LBE, Université de Montpellier, INRA, 102 Avenue des Etangs, F-11100 Narbonne, France;LCME, FST Marrakech, Université Cadi Ayyad, Marrakech 40000, Morocco;Mohammed VI Polytechnic University (UM6P), 43150 Benguerir, Morocco;OCP Group, Complexe industriel Jorf Lasfar, BP 118 El Jadida, Morocco;

关键词: anaerobic digestion;    pretreatment;    energy efficiency;    electrostatic separation;    milling;    sieving;   

DOI  :  10.3390/molecules23123295

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown