Valorisation of olive agro-industrial by-products as a source of bioactive compounds

Gullón, Beatriz; Gullón, Patricia; Eibes, Gemma; Cara, Cristóbal; Torres, Antonia de; López-Linares, Juan Carlos; Ruiz, Encarnación; Castro, Eulogio

doi:10.1016/j.scitotenv.2018.07.155

Cited by 85 publications

(73 citation statements)

References 57 publications

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“…In this sense, several phenolic compounds with antioxidant potential have been identified in waste generated by the olive pomace oil industry; these include hydroxytyrosol, tyrosol, oleuropein, apigenin, luteolin, and rutin, among others [ 8 ]. These compounds have been proved to have numerous benefits for human health, including anticarcinogenic, antimicrobial, antihypertensive, anti-inflammatory, hypoglycaemic, and hypocholesterolaemic properties [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Valorisation of Exhausted Olive Pomace by an Eco-Friendly Solvent Extraction Process of Natural Antioxidants

et al. 2020

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Exhausted olive pomace (EOP) is the waste generated from the drying and subsequent extraction of residual oil from the olive pomace. In this work, the effect of different aqueous solvents on the recovery of antioxidant compounds from this lignocellulosic biomass was assessed. Water extraction was selected as the best option for recovering bioactive compounds from EOP, and the influence of the main operational parameters involved in the extraction was evaluated by response surface methodology. Aqueous extraction of EOP under optimised conditions (10% solids, 85 ºC, and 90 min) yielded an extract with concentrations (per g EOP) of phenolic compounds and flavonoids of 44.5 mg gallic acid equivalent and 114.9 mg rutin equivalent, respectively. Hydroxytyrosol was identified as the major phenolic compound in EOP aqueous extracts. Moreover, these extracts showed high antioxidant activity, as well as moderate bactericidal action against some food-borne pathogens. In general, these results indicate the great potential of EOP as a source of bioactive compounds, with potential uses in several industrial applications.

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Section: Introductionmentioning

confidence: 99%

Valorisation of Exhausted Olive Pomace by an Eco-Friendly Solvent Extraction Process of Natural Antioxidants

et al. 2020

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“…OMWW has been widely investigated as a source of bioactive compounds, and the antioxidant activity of phenolics extracted from olive by-products has also been reported (Salido et al, 2015;Gullón et al, 2018). Phenols are present in OMWW mainly as colored pigments; their concentrations vary according to their chemical polarity, olive variety, and way of cultivation, as well as oil extraction methods and treatments applied to olive mill wastes (Dourou et al, 2016).…”

Section: Bioactive Compoundsmentioning

confidence: 99%

“…However, the overall outlook is not completely discouraging and there are evidences highlighting the use of OMWW as an economic resource. In this sense, several studies have indicated that OMWW could be recycled and used as starting material to obtain profitable compounds such as antioxidants, enzymes, biogas, soil conditioners, feed and food, and fertilizers (Kourmentza et al, 2017;Gullón et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Exploitation alternatives of olive mill wastewater: production of value-added compounds useful for industry and agriculture

et al. 2019

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HIGHLIGHTS Olive mill wastewater (OMWW) can be exploited as feedstock for production of high value-added commodities. An overview on potential uses of OMWW and related valorization strategies is presented. A multifaceted approach integrating sustainable management and biorefinery concept is needed. Valorization of various waste streams including OMWW is the main challenge faced by olive oil industry.

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“…These by-products are pathogen-free and very rich in organic matter, in nutrients, and are also characterized by high levels of bioactive molecules (particularly, polyphenols), showing strong antimicrobial and phytotoxic activities and not easily biodegradable. For those bioactive properties, these by-products can be recovered and reused for the production of functional foods for human or animal consumption, as well as for diet supplements and cosmetics formulations (Gullón et al, 2018;Herrero et al, 2011;Kishikawa et al, 2015;Di Nunzio et al, 2018;Romero, Medina, Mateo, & Brenes, 2018;Sousa, Costa, Alexandre, & Prata, 2019;Vitali Čepo et al, 2018). For that reason, the use of the phenolic compounds extracted from olive by-products represents a great opportunity for the circular economy.…”

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confidence: 99%

Chemical characterization and antioxidant properties of products and by‐products from Olea europaea L.

Tamasi

Baratto

Bonechi

et al. 2019

Food Science & Nutrition

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The products and by‐products of Olea europaea L.: olive fruits (primary agricultural product), oils (primary agro‐industrial product), pomaces (agro‐industrial processing by‐product), and leaves (agricultural practices by‐product), are promising sources of bioactive compounds. In the present study, qualitative and quantitative analyses of selected bioactive components in olive fruits, oils, and pomaces were performed. Total polyphenol content and antioxidant activity were analyzed in all samples (humid pomaces 2015: TPP, 26.0 ± 1.5–43.7 ± 3.0 g(GAEq)/kg DW; TEAC/ABTS, 189.5 ± 3.7–388.1 ± 12.0 mmol(Trx)kg DW). Radical (DPPH) quenching potential was analyzed via photometric and EPR methods, obtaining Vis/EPR signal ratio by 1.05 ± 0.45 and 1.66 ± 0.39 for fruits and pomaces, respectively. Through HPLC‐UV and HPLC‐MS/MS techniques, oleuropein and hydroxytyrosol, as well as selected hydroxycinnamic acids and flavonoids, were identified and quantified in olive fruits and pomaces. The main components were rutin, luteolin, and chlorogenic acid. Cytotoxic assay on fibroblast cells revealed toxic effects for selected extracts at highest tested concentrations (5%).

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Valorisation of olive agro-industrial by-products as a source of bioactive compounds

Cited by 85 publications

References 57 publications

Valorisation of Exhausted Olive Pomace by an Eco-Friendly Solvent Extraction Process of Natural Antioxidants

Valorisation of Exhausted Olive Pomace by an Eco-Friendly Solvent Extraction Process of Natural Antioxidants

Exploitation alternatives of olive mill wastewater: production of value-added compounds useful for industry and agriculture

Chemical characterization and antioxidant properties of products and by‐products from Olea europaea L.

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