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

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...

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Autores principales: Elalami, Doha, Carrère, Hélène, Abdelouahdi, Karima, Oukarroum, Abdallah, Dhiba, Driss, Arji, Mohamed, Barakat, Abdellatif
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6321404/
https://www.ncbi.nlm.nih.gov/pubmed/30545090
http://dx.doi.org/10.3390/molecules23123295
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author Elalami, Doha
Carrère, Hélène
Abdelouahdi, Karima
Oukarroum, Abdallah
Dhiba, Driss
Arji, Mohamed
Barakat, Abdellatif
author_facet Elalami, Doha
Carrère, Hélène
Abdelouahdi, Karima
Oukarroum, Abdallah
Dhiba, Driss
Arji, Mohamed
Barakat, Abdellatif
author_sort Elalami, Doha
collection PubMed
description 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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spelling pubmed-63214042019-01-14 Combination of Dry Milling and Separation Processes with Anaerobic Digestion of Olive Mill Solid Waste: Methane Production and Energy Efficiency Elalami, Doha Carrère, Hélène Abdelouahdi, Karima Oukarroum, Abdallah Dhiba, Driss Arji, Mohamed Barakat, Abdellatif Molecules Article 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. MDPI 2018-12-12 /pmc/articles/PMC6321404/ /pubmed/30545090 http://dx.doi.org/10.3390/molecules23123295 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Elalami, Doha
Carrère, Hélène
Abdelouahdi, Karima
Oukarroum, Abdallah
Dhiba, Driss
Arji, Mohamed
Barakat, Abdellatif
Combination of Dry Milling and Separation Processes with Anaerobic Digestion of Olive Mill Solid Waste: Methane Production and Energy Efficiency
title Combination of Dry Milling and Separation Processes with Anaerobic Digestion of Olive Mill Solid Waste: Methane Production and Energy Efficiency
title_full Combination of Dry Milling and Separation Processes with Anaerobic Digestion of Olive Mill Solid Waste: Methane Production and Energy Efficiency
title_fullStr Combination of Dry Milling and Separation Processes with Anaerobic Digestion of Olive Mill Solid Waste: Methane Production and Energy Efficiency
title_full_unstemmed Combination of Dry Milling and Separation Processes with Anaerobic Digestion of Olive Mill Solid Waste: Methane Production and Energy Efficiency
title_short Combination of Dry Milling and Separation Processes with Anaerobic Digestion of Olive Mill Solid Waste: Methane Production and Energy Efficiency
title_sort combination of dry milling and separation processes with anaerobic digestion of olive mill solid waste: methane production and energy efficiency
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6321404/
https://www.ncbi.nlm.nih.gov/pubmed/30545090
http://dx.doi.org/10.3390/molecules23123295
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