Abstract：
:This study aims to investigate the effects of microwaves, ultrasonic and alkaline pretreatments on olive pomace properties and its biomethane potential. Alkaline pretreatment was found to reduce lipid and fiber contents (especially lignin) and to increase soluble matter. The alkali pretreatment at a dose of 8% (w/w TS) under 25 °C and for 1 day removed 96% of initial lipids from the solid olive pomace. Unlike NaOH addition, mild microwaves and ultrasonic pretreatments had no impact on lignin. However, in the case of long microwaves pretreatment (450 W-10 min), cellulose and lignin contents were reduced by 50% and 26% respectively. Similarly, the combination of ultrasonic and alkali reagent showed a positive effect on fiber degradation and lipid solubilization as well as a positive impact on methane production. Statistical analysis highlighted the correlation between NaOH dose, solubilization and methane production. The alkaline pretreatment at ambient temperature appeared the most energetically efficient.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Elalami D,Carrere H,Abdelouahdi K,Garcia-Bernet D,Peydecastaing J,Vaca-Medina G,Oukarroum A,Zeroual Y,Barakat Adoi
10.1016/j.biortech.2019.122591subject
Has Abstractpub_date
2020-03-01 00:00:00pages
122591eissn
0960-8524issn
1873-2976pii
S0960-8524(19)31821-8journal_volume
299pub_type
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