scholarly journals Comparison between different liquid-liquid and solid phase methods of extraction prior to the identification of the phenolic fraction present in olive oil washing wastewater from the two-phase olive oil extraction system

2017 ◽  
Vol 68 (3) ◽  
pp. 208 ◽  
Author(s):  
S. Jiménez-Herrera ◽  
J. M. Ochando-Pulido ◽  
A. Martínez-Ferez
Keyword(s):  
Phenolic Compounds ◽  
Olive Oil ◽  
Solid Phase ◽  
Lipid Fraction ◽  
Liquid Extraction ◽  
Biologically Active ◽  
Two Phase ◽  
Phenolic Fraction ◽  
Hydrocinnamic Acid ◽  
Washing Wastewater

Phenolic compounds from olive mill wastewater (OMW), are characterized by a strong antioxidant activity. At the same time, they represent an environmental problem because they are difficult to degrade. The purpose of this work was to identify these biologically active compounds in the OMW from two-phase olive oil production in order to convert a polluting residue into a source of natural antioxidants. After optimizing the extraction process of phenolic compounds using liquid-liquid extraction (LLE) and solid phase extraction (SPE) methods, it was determined that the most appropriate sequence comprised a previous centrifugation to remove the lipid fraction, followed by liquid extraction with ethyl acetate or SPE. The most important compounds identified in olive oil washing wastewater (OOWW) were tyrosol, hydroxytyrosol and succinic acid; whereas the ones in the wastewater derived from the washing of the olives (OWW) were cresol, catechol, 4-methylcatechol, hydrocinnamic acid and p-hydroxy-hydrocinnamic acid.

scholarly journals Treatment of Two-Phase Olive Mill Wastewater and Recovery of Phenolic Compounds Using Membrane Technology

Membranes ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 27 ◽  
Author(s):  
Varvara Sygouni ◽  
Alexis G. Pantziaros ◽  
Iakovos C. Iakovides ◽  
Evangelia Sfetsa ◽  
Polychronia I. Bogdou ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Olive Oil ◽  
Membrane Filtration ◽  
Extraction Process ◽  
Membrane Technology ◽  
Total Phenolic ◽  
Two Phase ◽  
Efficient Treatment ◽  
Filtration System ◽  
Final Effluent

The semi-solid wastes (pomace or alperujo) produced in the two-phase olive oil extraction process contains extremely high organic load and phenolic substances. Efficient treatment of such kinds of wastes using membrane filtration, should be sought to reduce the hazardous effects to the environment. On the other hand, phenolic compounds can be isolated and purified up to a level of commercial exploitation using the membrane technology. Firstly, the extraction process with mixtures of water and ethanol was optimized by testing extraction parameters (e.g., solvent’s mixture, duration, and temperature) at laboratory scale. Next, extraction was conducted using larger volumes and the treatment was continued in a pilot membrane filtration system, consisted of ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO) membranes. The extracted solution from the olive oil pomace was fed to the pilot membrane filtration system, where all fat, lipids, and solids were removed while the phenolic compounds were concentrated in the retentate streams of NF and/or RO. Total phenolic content (TPC) at the RO’s concentrate stream was 225 mg/L and at the final effluent was lower than 10 mg/lt. The chemical oxygen demand (COD) value at the final effluent was much lower (~280 mg/L) than in the feed stream (>32,000 mg/L).

scholarly journals Structure–Biological Activity Relationships of Extra-Virgin Olive Oil Phenolic Compounds: Health Properties and Bioavailability

Antioxidants ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 685 ◽  
Author(s):  
Paloma Rodríguez-López ◽  
Jesús Lozano-Sanchez ◽  
Isabel Borrás-Linares ◽  
Tatiana Emanuelli ◽  
Javier A. Menéndez ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Olive Oil ◽  
Functional Food ◽  
Molecular Mechanisms ◽  
Virgin Olive Oil ◽  
Extra Virgin Olive Oil ◽  
The Body ◽  
Phenolic Fraction

Extra-virgin olive oil is regarded as functional food since epidemiological studies and multidisciplinary research have reported convincing evidence that its intake affects beneficially one or more target functions in the body, improves health, and reduces the risk of disease. Its health properties have been related to the major and minor fractions of extra-virgin olive oil. Among olive oil chemical composition, the phenolic fraction has received considerable attention due to its bioactivity in different chronic diseases. The bioactivity of the phenolic compounds could be related to different properties such as antioxidant and anti-inflammatory, although the molecular mechanism of these compounds in relation to many diseases could have different cellular targets. The aim of this review is focused on the extra-virgin olive oil phenolic fraction with particular emphasis on (a) biosynthesis, chemical structure, and influence factors on the final extra-virgin olive oil phenolic composition; (b) structure–antioxidant activity relationships and other molecular mechanisms in relation to many diseases; (c) bioavailability and controlled delivery strategies; (d) alternative sources of olive biophenols. To achieve this goal, a comprehensive review was developed, with particular emphasis on in vitro and in vivo assays as well as clinical trials. This report provides an overview of extra-virgin olive oil phenolic compounds as a tool for functional food, nutraceutical, and pharmaceutical applications.

Matrix solid-phase dispersion: a simple and fast technique for the determination of phenolic compounds in olive oil by liquid chromatography

2014 ◽  
Vol 6 (22) ◽  
pp. 8986-8995 ◽  
Author(s):  
Romina P. Monasterio ◽  
Ariel R. Fontana ◽  
María Fernanda Silva
Keyword(s):  
Liquid Chromatography ◽  
Phenolic Compounds ◽  
Sample Preparation ◽  
Olive Oil ◽  
Phenolic Compound ◽  
Solid Phase ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion

MSPD-HPLC-MWD for phenolic compound determination in olive oil was developed. It is simple and requires little sample preparation, thus increasing the throughput.

About two-phase olive oil washing wastewater simultaneous phenols recovery and treatment by nanofiltration

2018 ◽  
Vol 114 ◽  
pp. 159-168 ◽  
Author(s):  
J.M. Ochando-Pulido ◽  
J.R. Corpas-Martínez ◽  
A. Martinez-Ferez
Keyword(s):  
Olive Oil ◽  
Two Phase ◽  
Washing Wastewater

Solid-phase extraction and gas chromatographic analysis of phenolic compounds in virgin olive oil

2001 ◽  
Vol 73 (1) ◽  
pp. 119-124 ◽  
Author(s):  
Lolita Liberatore ◽  
Giuseppe Procida ◽  
Nicola d'Alessandro ◽  
Angelo Cichelli
Keyword(s):  
Phenolic Compounds ◽  
Solid Phase Extraction ◽  
Olive Oil ◽  
Chromatographic Analysis ◽  
Solid Phase ◽  
Virgin Olive Oil ◽  
Phase Extraction ◽  
Gas Chromatographic Analysis

scholarly journals A Novel Photocatalyst with Ferromagnetic Core Used for the Treatment of Olive Oil Mill Effluents from Two-Phase Production Process

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Javier Miguel Ochando-Pulido ◽  
Gassan Hodaifa ◽  
María Dolores Víctor-Ortega ◽  
Antonio Martínez-Ferez
Keyword(s):  
Olive Oil ◽  
Treatment Process ◽  
Pilot Scale ◽  
Photocatalytic Process ◽  
Olive Oil Mill Wastewater ◽  
Two Phase ◽  
Overall Efficiency ◽  
Washing Wastewater ◽  
Continuous Centrifugation ◽  
Phase Production

Photocatalytic degradation of olive oil mill wastewater from two-phase continuous centrifugation process was studied. A novel photocatalyst with ferromagnetic properties was characterized and investigated. The degradation capacity of the photocatalytic process of olive oil washing wastewater (OMW) and mixture of olives and olive oil (1 v/v) washing wastewaters (MOMW) was demonstrated. At lab-scale, the %COD removal and residence time (τ) for MOMW and OMW were 58.4% (τ=2 h) and 21.4% (τ=3 h), respectively. On the other hand, at pilot scale, 23.4%CODremoval, 19.2% totalphenolsremoval, and 28.1% total suspendedsolidsremovalwere registered at the end of the UV/TiO2process for OMW, whereas 58.3%CODremoval, 27.5% totalphenolsremoval, and 25.0% total suspendedsolidsremovalfor MOMW. Also, before the UV/TiO2reaction, a pH-T flocculation operation as pretreatment was realized. The overall efficiency of the treatment process for MOMW was up to 91% ofCODremoval, in contrast with 33.2% ofCODremovalfor OMW.

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