Organic compounds in olive mill wastewater and in solutions resulting from hydrothermal carbonization of the wastewater

Poerschmann, Juergen; Weiner, Barbara; Baskyr, I.

doi:10.1016/j.chemosphere.2013.03.061

Cited by 32 publications

(12 citation statements)

References 35 publications

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“…It is important to underline that the degradation and transformation reaction during the HTC process progress could lead to two possible outcomes: (i) dissolution of the organic and mineral matrix of the lignocellulosic material into surrounding liquid media (Poerschmann et al, 2013b) or (ii) carbon condensation reaction driven by recombination of by-products (Lin et al, 2016).…”

Section: Carbonization Yieldsmentioning

confidence: 99%

Olive mill wastewater: From a pollutant to green fuels, agricultural and water source and bio-fertilizer – Hydrothermal carbonization

Azzaz

Jeguirim

Kinigopoulou³

et al. 2020

Science of The Total Environment

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Hydrothermal carbonization (HTC) is considered as a promising technique for wastes conversion into carbon rich materials for various energetic, environmental and agricultural applications. In this work, the HTC of olive mill wastewater (OMWW) was investigated at different temperatures (180 -220°C) and both, the solid (i.e., hydrochars) and the final process liquid derived from the thermal conversion process were deeply analyzed. Results showed that the solid yield was affected by the temperature, i.e., decrease from 57% to 25% for temperatures of 180°C and 220°C, respectively. Furthermore, the hydrochars presented an increasing fixed carbon percentage with the increase of the carbonization temperature, suggesting that decarboxylation is the main reaction driving the HTC process. The decrease in the O/C ratio promoted an increase of the high heating value (HHV) by 32% for hydrochar prepared at 220°C. The process liquids were sampled and their organic contents were analyzed using GC-MS technique. Acids, alcohols, phenols and sugar derivatives were detected and their concentrations varied with carbonization temperatures. The assessment of the physico-chemical properties of the generated HTC by-products suggested the possible application of the hydrochars for energetic insights while the liquid fraction could be practical for in agricultural field.

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Section: Carbonization Yieldsmentioning

confidence: 99%

Olive mill wastewater: From a pollutant to green fuels, agricultural and water source and bio-fertilizer – Hydrothermal carbonization

Azzaz

Jeguirim

Kinigopoulou³

et al. 2020

Science of The Total Environment

View full text Add to dashboard Cite

show abstract

“…On the other hand, it should also be taken into account that CA and its phenolic derivatives represent dangerous contaminating agents in wastewaters of agricultural origin (Isidori et al, 2005;Poerschmann et al, 2013). Therefore, the investigation of the adsorption properties of the prepared OC toward this compound, could serve the additional purpose of providing useful information to be exploited in the remediation field.…”

Section: Introductionmentioning

confidence: 99%

Clay-biosurfactant materials as functional drug delivery systems: Slowing down effect in the in vitro release of cinnamic acid

Calabrese

Gelardi

Merli

et al. 2017

Applied Clay Science

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“…This compounds are more frequent in grains such as flaxseed or sesame, and in the bark of several types of trees such as olive trees or some Pinus species [3]. Lignans such as pinoresinol (PIN) and acetoxypinoresinol (AC-PIN) have been reported in the phenolic fraction of virgin olive oil [4,5,6,7] and in olive mill wastewater [8].…”

Section: Introductionmentioning

confidence: 99%

Lignans in Olive Stones Discarded From the Oil Industry. Comparison of Three Extraction Methods Followed by HPLC-Dad-MS/MS and Antioxidant Capacity Determination

Inostroza

Troncoso

Mardones

et al. 2018

J. Chil. Chem. Soc.

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Lignans are secondary metabolites with diverse chemical structure, and are frequent in food grains. A lignan rich diet have a positive health impact over chronic diseases and protection against certain types of cancer. To enhance the intake of lignans the addition of this compound in processed food could be a solution, so the best approach is to find a source of lignans, especially one that is discarded as waste. In the olive oil production there is a large volume of phytotoxic waste generated, among these is the olive stone (OS), that it is generally burned for fuel. It has been reported the presence of lignans in olive stones extracted with methanol reflux.Three extraction methods for lignans and polyphenolic compounds were assessed: solid-liquid ultrasound assisted extraction with basic hydrolysis, methanolic extraction with Soxhlet, and CO 2 supercritical fluid extraction with methanol as a modifier. The determination of lignan content in OS samples were evaluated by HPLC with a core shell C18 column and the detection was in tandem with DAD and MS/MS. The extracts were also evaluated in their antioxidant capacity with ABTS, CUPRAC and ORAC assays and total polyphenol concentration.The aim of this work is to evaluate different methods to extract lignans from OS discarded from the olive oil industry. The main lignan identified in OS extract was pinoresinol. The SFE method to extract pinoresinol was more efficient than Soxhlet and ultrasound assisted solid liquid extractions, producing a higher amount of pinoresinol in the extract in less time and with less amount of co-extracted interferents. The extract produced with Soxhlet had a higher antioxidant capacity.

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Organic compounds in olive mill wastewater and in solutions resulting from hydrothermal carbonization of the wastewater

Cited by 32 publications

References 35 publications

Olive mill wastewater: From a pollutant to green fuels, agricultural and water source and bio-fertilizer – Hydrothermal carbonization

Olive mill wastewater: From a pollutant to green fuels, agricultural and water source and bio-fertilizer – Hydrothermal carbonization

Clay-biosurfactant materials as functional drug delivery systems: Slowing down effect in the in vitro release of cinnamic acid

Lignans in Olive Stones Discarded From the Oil Industry. Comparison of Three Extraction Methods Followed by HPLC-Dad-MS/MS and Antioxidant Capacity Determination

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