Olive mill wastewater microconstituents composition according to olive variety and extraction process
2016
Graulet, Benoit | Cornu, Agnes | Portelli, Josiane | Aggoun, Moufida | Barkat, Malika | Arhab, Rabah
Olive oil production yields a considerable amount of wastewater, a powerful pollutant that is currentlydiscarded but could be considered as a potential source of valuable natural products due to its contentin phenolic compounds and other natural antioxidants.The aim of this work was to explore the variability in olive mill wastewater composition from Algerianolive oil mills considering extraction processes (traditional discontinuous press vs 3-phases centrifugalsystem) and olive varieties (Azerraj, Sigoise, Chemlal). Whereas pH, dry or organic matter content didn’tvary, there was a significant difference in ash content according to extraction process and olive variety.Carotenoid content was 2.2-fold higher with 3-phases than with press systems whereas tocopherolcontent was not significantly different. Among the phenolic compounds quantified, tyrosol was usuallythe most abundant whereas oleuropein concentrations were highly variable. Differences in phenoliccompound concentrations were more pronounced between olive varieties than between processes.
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