Advances in membrane operations for water purification and biophenols recovery/valorization from OMWWs

Bazzarelli, Fabio; Piacentini, Emma; Poerio, Teresa; Mazzei, Rosalinda; Cassano, Alfredo; Giorno, Lidietta

doi:10.1016/j.memsci.2015.09.049

Cited by 73 publications

(48 citation statements)

References 33 publications

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“…The almost similar results are obtained by Hamdi et al [47], who also noted an increase in pH during the biodegradation of organic matter in OMWW by soil microorganisms. The increase in pH values during treatment may be attributed in part to the high reduction in polyphenols contents and relatively moderate reductions in organic matter (as showed by lower COD concentrations) of which organic acids were considered to be major components [48]. Electrical conductivity is closely related to the concentration of dissolved substances and their nature.…”

Section: Global Results Of Each Physicochemical Parameter With Time Dmentioning

confidence: 99%

Olive mill wastewater treatment using infiltration percolation in column followed by aerobic biological treatment

et al. 2020

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This work aims to treat olive mill wastewater (OMWW) by infiltration percolation in different columns containing filtration sand, granular activated carbon, and lime, and thus followed by biological treatment using the soil microorganisms to the treatment that will give the best results. The optimum removal efficiency was obtained using granular activated carbon column mixed with 15% of lime with percentages removal of 39.33, 60.28, 53.17 and 88.74% for biological oxygen demand (BOD5), chemical oxygen demand (COD), polyphenols and suspended matter respectively. Aerobic treatment 30 days of OMWW obtained from the column of activated carbon mixed with 15% of lime, neutralized and diluted 15 times with distilled water was investigated. The results showed a significant percentage reduction of 79.78, 69.43, and 60.67%, respectively, for BOD5, COD, and polyphenols. The global removal percentages after the two successive treatments were 87.86% for COD, 87.39% for BOD5 and 81.59% for polyphenols compounds. Fourier Transformed Infrared spectroscopy analysis of crude OMWW, infiltrated percolated and biologically treated, showed a difference between the spectra that manifests by the reduction of the spectrum intensity bands after each treatment stage, which confirmed the analytical results. Soil microorganisms have shown their biodegradation efficiency of organic matter and polyphenols of these much-polluted effluents under aerobic conditions. The results indicated that the pretreatment of raw olive mill wastewater could be realized before biological treatment to obtain a satisfactory reduction.

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Section: Global Results Of Each Physicochemical Parameter With Time Dmentioning

confidence: 99%

Olive mill wastewater treatment using infiltration percolation in column followed by aerobic biological treatment

et al. 2020

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“…There are many techniques for treatment of wastewater contaminated with phenolic compounds, including biological processes [5,6], coagulation [7], membranes [8], electro-Fenton and photoelectro-Fenton treatments [9], ozonation [10], oxidation [11,12], and adsorption [13][14][15][16]. However, application of these methods is restricted since they are very expensive and involve high initial capital and operational costs.…”

Section: Introductionmentioning

confidence: 99%

Activated carbon obtained from sapelli wood sawdust by microwave heating for o-cresol adsorption

et al. 2016

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Activated carbon (AC) was prepared from sapelli wood sawdust using a microwave heating process. The biomass was mixed with inorganic components (lime ? ZnCl 2 and FeCl 3) to form a homogeneous paste. The AC samples are denoted as AC-1A (100 g sapelli wood sawdust ? 20 g lime ? 80 g ZnCl 2), AC-2A (150 g sapelli wood sawdust ? 20 g lime ? 80 g ZnCl 2), AC-1B (100 g sapelli wood sawdust ? 20 g lime ? 40 g ZnCl 2 ? 40 g FeCl 3), and AC-2B (150 g sapelli wood sawdust ? 20 g lime ? 40 g ZnCl 2 ? 40 g FeCl 3). The samples were placed in a microwave oven and pyrolyzed under nitrogen flow. To increase their porosity, the pyrolyzed samples were subjected to a leaching process (with 6 mol L-1 HCl) under reflux to eliminate inorganic components. Several analytical techniques such as Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and N 2 isotherm and vapor adsorption analyses were performed to characterize the AC materials. The samples presented high Brunauer-Electronic supplementary material The online version of this article (

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“…In this work, for the first time, microparticle production, containing biophenols recovered from OMWWs by integrated membrane processes [ 12 ], has been achieved. OMWWs used in the present work were produced from the biologic olive oil production (toxic pesticides are not used) and supplied by Olearia San Giorgio (San Giorgio Morgeto, Italy).…”

Section: Introductionmentioning

confidence: 99%

Microencapsulation by Membrane Emulsiﬁcation of Biophenols Recovered from Olive Mill Wastewaters

et al. 2016

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Biophenols are highly prized for their free radical scavenging and antioxidant activities. Olive mill wastewaters (OMWWs) are rich in biophenols. For this reason, there is a growing interest in the recovery and valorization of these compounds. Applications for the encapsulation have increased in the food industry as well as the pharmaceutical and cosmetic fields, among others. Advancements in micro-fabrication methods are needed to design new functional particles with target properties in terms of size, size distribution, and functional activity. This paper describes the use of the membrane emulsification method for the fine-tuning of microparticle production with biofunctional activity. In particular, in this pioneering work, membrane emulsification has been used as an advanced method for biophenols encapsulation. Catechol has been used as a biophenol model, while a biophenols mixture recovered from OMWWs were used as a real matrix. Water-in-oil emulsions with droplet sizes approximately 2.3 times the membrane pore diameter, a distribution span of 0.33, and high encapsulation efficiency (98% ± 1% and 92% ± 3%, for catechol and biophenols, respectively) were produced. The release of biophenols was also investigated.

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Advances in membrane operations for water purification and biophenols recovery/valorization from OMWWs

Cited by 73 publications

References 33 publications

Olive mill wastewater treatment using infiltration percolation in column followed by aerobic biological treatment

Olive mill wastewater treatment using infiltration percolation in column followed by aerobic biological treatment

Activated carbon obtained from sapelli wood sawdust by microwave heating for o-cresol adsorption

Microencapsulation by Membrane Emulsiﬁcation of Biophenols Recovered from Olive Mill Wastewaters

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