Recovery of Phenolic Antioxidants from Olive Mill Wastewater

Takaç, Serpil; Karakaya, Alper

doi:10.2174/2211334710902030230

Cited by 62 publications

(25 citation statements)

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“…Membrane operations (Table 4) can be considered a valid approach for the selective removal of polyphenols from OMW. Many studies indicate that the future direction of the processes for the recovery of antioxidants from OMW is presumably towards the utilization of membranes in a sequential design [3]. Russo used several microfiltration (MF) and ultrafiltration (UF) membranes to concentrate the recovered polyphenols from vegetation waters (VW), using a final reverse osmosis (RO) consisting of a polymeric hydranautics membrane (composite polyamide).…”

Section: Membrane (Filtration)mentioning

confidence: 99%

“…This waste stream is generated in several forms and compositions following the particular characteristics of the used extraction equipment, olive variety, season and maturity of the fruit [2]. Pressure and three phase centrifugation systems produce considerably more liquid effluent than two phase centrifugation process [3]. The discontinuous process produces less but more concentrated wastewater (0.5-1 m 3 per 1,000 kg) than the centrifugation process (1-1.5 m 3 per 1,000 kg) [4].…”

Section: Introductionmentioning

confidence: 99%

“…The discontinuous process produces less but more concentrated wastewater (0.5-1 m 3 per 1,000 kg) than the centrifugation process (1-1.5 m 3 per 1,000 kg) [4]. Although the liquid waste is reduced in the two-phase centrifugation system, large amounts of semisolid or slurry waste-commonly referred to as two-phase pomace are discharged [3]. The annual world OMW production is estimated from 10 to over 30 million m 3 [5].…”

Section: Introductionmentioning

confidence: 99%

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Recovery and Removal of Phenolic Compounds from Olive Mill Wastewater

Rahmanian

Jafari

Galanakis³

2013

J Americ Oil Chem Soc

279

110

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Food wastes are today considered as a cheap source of valuable components since the existent technologies allow the recovery of target compounds and their recycling inside the food chain as functional additives in different products. Olive mill wastewater (OMW) is generated from olive oil extraction systems. It has high addedvalue compounds namely phenolics, recalcitrants, pectin, and some important enzymes. It causes a certain amount of toxicity/phytotoxicity because of its phenolic compounds. OMW also has significant impacts when discharged directly into surface waters. Therefore, the treatment of olive mill wastewater is very much needed. Several types of techniques have been investigated for OMW treatment along with recovery and removal of its phenolic compounds. Among these techniques, physical ones are utilized for extraction purposes, while chemical and biological methods are applied in order to diminish organic load. In this review, current status and recent developments in the recovery and removal of phenolic compounds from OMW have been critically examined.

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Section: Membrane (Filtration)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Recovery and Removal of Phenolic Compounds from Olive Mill Wastewater

Rahmanian

Jafari

Galanakis³

2013

J Americ Oil Chem Soc

279

110

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“…The traditional three-phase systems for olive pressing produce three streams of olive oil, olive cake, and aqueous olive mill wastewater (OMW) while the two-phase systems separate the olive paste into two phases of olive oil and semisolid waste known as pomace. [1][2][3] While two-phase systems provide comparatively low OMW volumes but relevant quantity of organic matter, three-phase extraction systems, which involve the addition of water (up to 50 L/100 kg olive paste), give rise to an annual worldwide production of large amounts of OMW. 1 Since OMW has broad spectrum toxicity and antimicrobial activity, leading to a difficult biological degradation, its disposal is a major problem that needs to be addressed for the development of a sustainable olive oil industry.…”

Section: Introductionmentioning

confidence: 99%

Characterization of bioactive and nutraceutical compounds occurring in olive oil processing wastes

Ventura

Calvano

Abbattista

et al. 2019

Rapid Comm Mass Spectrometry

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Rationale Several bioactive compounds, including phenolic acids and secoiridoids, are transferred from olive drupes to olive oil during the first stage of production. Here, the characterization of these low molecular weight (LMW) compounds in olive oil and in closely related processing materials, like olive leaves (OL) and olive mill wastewaters (OMW), was faced up, for the first time, by matrix‐assisted laser desorption/ionization (MALDI) time‐of‐flight mass spectrometry (TOF MS). Methods A novel binary matrix composed of 1,8‐bis(tetramethylguanidino)naphthalene (TMGN) and 9‐aminoacridine (9AA) (1:1 molar ratio), displaying excellent ionization properties at low levels of laser energy, was employed in reflectron negative ion mode by a MALDI TOF/TOF system equipped with a neodymium‐doped yttrium lithium fluoride (Nd:YLF) laser (345 nm). MS/MS experiments were performed by using ambient air as the collision gas. Results Four major secoiridoids typically present in olive oil, i.e., the aglycones of oleuropein and ligstroside, and oleacein and olecanthal at m/z 377.1, 361.1, 319.1 and 303.1, respectively, were detected in virgin olive oil (VOO) extracts, along with some of their chemical/enzymatic hydrolysis by‐products, such as elenolic (m/z 241.1), decarboxymethyl‐elenolic acids (m/z 183.1) and hydroxytyrosol (m/z 153.1). Besides oleuropein aglycone and oleacein, hydroxylated derivatives of decarboxymethyl‐elenolic acid and hydroxytyrosol were evidenced in OMW. Conclusions While oleuropein was confirmed in OL extracts, several interesting phenolic compounds, including hydroxytyrosol, were recognized in OMW. The proposed approach based on the use of a novel binary matrix for MALDI MS/MS analyses of LMW bioactive compounds can be considered a promising analytical tool for a rapid screening of the phenolic fraction in olive oils and related processing wastes.

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“…The most abundant and interesting phenolic compounds present in OOWW from the two-phase olive oil system are hydroxytyrosol and tyrosol (Takaç and Karakaya, 2009). One of the explanations for the formation of hydroxytyrosol is the hydrolysis of oleuropein (the main biophenol in many olive varieties) due to the action of esterases and acid hydrolysis of secoiridoid derivatives caused by the addition of HCl to the OOWW during oil extraction.…”

Section: Introductionmentioning

confidence: 99%

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

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SUMMARY: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. KEYWORDS: Antioxidants; Ethyl acetate; Extraction; Hydroxytyrosol; Olive oil wastewater; PolyphenolsRESUMEN: Comparación entre métodos de extracción líquido-líquido y en fase sólida previos a la identificación de la fracción fenólica presente en las aguas residuales procedentes del lavado del aceite de oliva obtenido mediante el sistema de extracción de aceite de oliva en dos fases. Los compuestos fenólicos presentes en las aguas residuales de la industria oleícola (OMW) se caracterizan por una gran actividad antioxidante. Por otra parte, suponen un problema medioambiental debido a que son difíciles de degradar. El objetivo de este trabajo fue la identificación de estos compuestos biológicamente activos que se encuentran en las OMW generadas del proceso de obtención del aceite de oliva por el sistema de dos fases, para así convertir un residuo contaminante en una fuente de antioxidantes naturales. Tras optimizar el proceso de extracción de los compuestos fenólicos utilizando extracción líquido-líquido (LLE) y extracción en fase sólida (SPE), se obtuvo que la secuencia más apropiada comprendió una centrifugación previa para eliminar la fracción lipídica, seguida de una extracción líquida con acetato de etilo o una SPE. Los compuestos más importantes identificados en las aguas residuales del lavado del aceite de oliva (OOWW) fueron tirosol, hidroxitirosol y el ácido succínico, mientras que los de las aguas residuales derivadas del lavado de las aceitunas (OWW) fueron cresol, catecol, 4-metilcatecol, ácido hidrocinámico y ácido p-hidroxi-hidrocinámico.

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Recovery of Phenolic Antioxidants from Olive Mill Wastewater

Cited by 62 publications

References 0 publications

Recovery and Removal of Phenolic Compounds from Olive Mill Wastewater

Recovery and Removal of Phenolic Compounds from Olive Mill Wastewater

Characterization of bioactive and nutraceutical compounds occurring in olive oil processing wastes

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

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