Concentration of phenolic compounds from olive washing wastewater by forward osmosis using table olive fermentation brine as draw solution

Cifuentes-Cabezas, Magdalena; Pavani, Alessio; Vincent‐Vela, María‐Cinta; Mendoza–Roca, J.A.; Álvarez-Blanco, Silvia

doi:10.1016/j.eti.2023.103054

Cited by 8 publications

(4 citation statements)

References 62 publications

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“…Apart from those compounds, a high concentration of organic matter was present in the extract, as reflected by the high sugar and total solids content. The brownish color of the extract was reflected by a high color coefficient in comparison with other olive-derived wastewaters [32]. The slightly acidic pH was attributed to the presence of organic acids, as presented in Figures 3 and 5.…”

Section: Discussionmentioning

confidence: 89%

Integrated Membrane Process in Organic Media: Combining Organic Solvent Ultrafiltration, Nanofiltration, and Reverse Osmosis to Purify and Concentrate the Phenolic Compounds from Wet Olive Pomace

Sánchez-Arévalo,

Aldegheri,

Vincent-Vela

et al. 2024

IJMS

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Phenolic compounds from a hydroalcoholic extract of wet olive pomace were purified and concentrated by an integrated membrane process in organic media. First, UF010104 (Solsep BV) and UP005 (Microdyn Nadir) membranes were tested to be implemented in the ultrafiltration stage, with the aim of purifying the extract and obtaining a permeate enriched in phenolic compounds. Despite the high flux observed with the UF010104 membrane (20.4 ± 0.7 L·h−1·m−2, at 2 bar), the UP005 membrane was selected because of a more suitable selectivity. Even though some secoiridoids were rejected, the permeate stream obtained with this membrane contained high concentrations of valuable simple phenols and phenolic acids, whereas sugars and macromolecules were retained. Then, the ultrafiltration permeate was subjected to a nanofiltration step employing an NF270 membrane (DuPont) for a further purification and fractionation of the phenolic compounds. The permeate flux was 50.2 ± 0.2 L·h−1·m−2, working at 15 bar. Hydroxytyrosol and some phenolic acids (such as vanillic acid, caffeic acid, and ferulic acid) were recovered in the permeate, which was later concentrated by reverse osmosis employing an NF90 membrane. The permeate flux obtained with this membrane was 15.3 ± 0.3 L·h−1·m−2. The concentrated phenolic mixture that was obtained may have important applications as a powerful antioxidant and for the prevention of diabetes and neurodegenerative diseases.

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Section: Discussionmentioning

confidence: 89%

Integrated Membrane Process in Organic Media: Combining Organic Solvent Ultrafiltration, Nanofiltration, and Reverse Osmosis to Purify and Concentrate the Phenolic Compounds from Wet Olive Pomace

Sánchez-Arévalo,

Aldegheri,

Vincent-Vela

et al. 2024

IJMS

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“…The operating conditions for the characterization tests were the same for both membranes, with flow rates of 25 L·h −1 for the FS and 15 L·h −1 for the DS. Then, two tests were carried out to evaluate the prediction of the selected model: ( i ) a test using distilled water as the FS and a concentration of 200 g·L −1 of NaCl for the DS; and ( ii ) a test using 1 g·L −1 of tyrosol as the FS and 30 g·L −1 of NaCl as the DS (see [ 29 ] for the justification of the concentrations used). In the case of the FTSH2O membrane, the FS and the DS were pumped at a flow rate of 30 L·h −1 , while for the HFFO2 membrane, the experiments were carried out at 60 L·h −1 for the FS and 25 L·h −1 for the DS (based on manufacturer recommendations and previous studies carried out by the research group).…”

Section: Methodsmentioning

confidence: 99%

Theoretical Model for the Prediction of Water Flux during the Concentration of an Olive Mill Wastewater Model Solution by Means of Forward Osmosis

Cifuentes-Cabezas,

Álvarez-Blanco,

Mendoza-Roca

et al. 2023

Membranes

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Currently, understanding the dynamics of the interaction between the agents in a process is one of the most important factors regarding its operation and design. Membrane processes for industrial wastewater management are not strangers to this topic. One such example is the concentration of compounds with high added value, such as the phenolic compounds present in olive mill wastewater (OMW). This process is a viable option, thanks to the forward osmosis (FO) process, osmotically driven by a saline stream. In this context, the transport of the solute and the solvent through the FO membranes, although essential to the process, remains problematic. This paper presents a study to predict, by means of a theoretical model, the water flux for two membranes (a cellulose triacetate flat sheet and a polyamide hollow fiber with integrated aquaporin proteins) with different characteristics using a sodium chloride solution as the draw solution (DS). The novelty of this model is the consideration of the contribution of organic compounds (in addition to the inorganic salts) to the osmotic pressure in the feed side. Moreover, the geometry of the modules and the characteristics of the membranes were also considered. The model was developed with the ability to run under different conditions, with or without tyrosol (the compound chosen as representative of OMW phenolic compounds) in the feed solution (FS), and was fitted and evaluated using experimental data. The results presented a variability in the model prediction, which was a function of both the membrane used and the FS and DS, with a greater influence of tyrosol observed on the permeate flux in the flat cellulose triacetate membrane.

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Section: Influence Of the Type Of Ds On The Concentration Efficiencymentioning

confidence: 99%

“…In this case, it was the active layer of the membrane facing FS (AL-FS). In this configuration, concentration polarization occurs within the porous FO support layer, called internal concentration polarization (ICP), which causes a decrease in the permeate flux [45,46]. On the other hand, the decision was made to work in counter current mode, as it has been reported to increase driving force compared to parallel operation [47].…”

Section: Influence Of the Type Of Ds On The Concentration Efficiencymentioning

confidence: 99%

Feasibility of Forward Osmosis to Recover Textile Dyes Using Single Salts and Multicomponent Draw Solutions

Cifuentes-Cabezas,

García-Suarez,

Soler-Cabezas

et al. 2023

Membranes

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The textile industry generates large volumes of water characterized mainly by an intense color coming from dyes that are difficult to process due to their synthetic base and the presence of aromatic components. Due to the stricter regulation on the discharge of these effluents, in order to reduce dye waste before discharge into natural channels, alternatives are being sought to manage this wastewater. In this work, the concentration of dyes in simulated wastewater from the textile industry was studied by forward osmosis (with a cellulose triacetate CTA membrane), with the aim of concentrating the dye for its future recovery and reincorporation into the production process. Two dyes of different nature were evaluated to study the efficiency of the proposed process, using NaCl and reverse osmosis brine from a model seawater desalination solution as extraction solutions. It was observed that dye type (reactive or direct) and their charge influence the color rejection with the forward osmosis membrane used. It was able to concentrate the dyes in the feed solution up to approximately 55% with the reverse osmosis brine from the model seawater desalination solution. Finally, the results demonstrate that the FO process is a promising option for concentrating dyes present in wastewater from the textile industry in order to reuse them in the dyeing process.

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Concentration of phenolic compounds from olive washing wastewater by forward osmosis using table olive fermentation brine as draw solution

Cited by 8 publications

References 62 publications

Integrated Membrane Process in Organic Media: Combining Organic Solvent Ultrafiltration, Nanofiltration, and Reverse Osmosis to Purify and Concentrate the Phenolic Compounds from Wet Olive Pomace

Integrated Membrane Process in Organic Media: Combining Organic Solvent Ultrafiltration, Nanofiltration, and Reverse Osmosis to Purify and Concentrate the Phenolic Compounds from Wet Olive Pomace

Theoretical Model for the Prediction of Water Flux during the Concentration of an Olive Mill Wastewater Model Solution by Means of Forward Osmosis

Feasibility of Forward Osmosis to Recover Textile Dyes Using Single Salts and Multicomponent Draw Solutions

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