Study of OMWWs suspended solids destabilization to improve membrane processes performance

Bazzarelli, Fabio; Poerio, Teresa; Mazzei, Rosalinda; D’Agostino, Napoleone; Giorno, Lidietta

doi:10.1016/j.seppur.2015.05.040

Cited by 29 publications

(13 citation statements)

References 16 publications

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“…Steady-state permeate fluxes were reached after 300 and 200 min of continuous operation for the batch concentration mode and feed-and-bleed mode, respectively. By referring to the feed-and-bleed operation mode the high flux value confirms the results obtained by using pre-treated OMWWs according to the methodology reported in Bazzarelli et al [21]. Indeed, a constant flux of 60 L/h m 2 was maintained after 480 min of processing.…”

Section: Microfiltrationsupporting

confidence: 87%

“…Indeed, a constant flux of 60 L/h m 2 was maintained after 480 min of processing. It is noticeable that this result has been obtained using a membrane module with a membrane surface area (0.35 m 2 ) 194 times higher than the one (18 cm 2 ) used in Bazzarelli et al [21]. These data demonstrated the easy scale-up of the MF process for large scale OMWWs processing.…”

Section: Microfiltrationmentioning

confidence: 52%

“…They were supplied by Olearia San Giorgio (San Giorgio Morgeto, Italy)coming from the biologic olive oil production without using of toxic pesticides. In order to reduce the suspended content, OMWWs were pre-treated according to the procedure reported in the previous work [21]. This method permits to completely remove suspended solids and therefore reducing fouling phenomena during the membrane filtration.…”

Section: Olive Mill Wastewatersmentioning

confidence: 99%

See 2 more Smart Citations

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

Bazzarelli

Piacentini

Poerio

et al. 2016

Journal of Membrane Science

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Section: Microfiltrationsupporting

confidence: 87%

Section: Microfiltrationmentioning

confidence: 52%

Section: Olive Mill Wastewatersmentioning

confidence: 99%

See 1 more Smart Citation

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

Bazzarelli

Piacentini

Poerio

et al. 2016

Journal of Membrane Science

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“…OMW was first centrifuged (Eppendorf 5804, Hamburg, Germany) for 30 min at 4000 rpm in order to separate the remaining solid particles, obtaining a liquid phase with a pH value of 4.85 (GLP-21 pH-meter, Crison, Barcelona, Spain). Afterwards, based on the method described by Bazzarelli et al [ 41 ], acidification with HCl (37%) was performed by 0.003% ( v / w ) addition to reach pH = 1.8. After 24 h, the pretreated OMW was used in a two-stage membrane treatment process including ultrafiltration (UF) followed by nanofiltration (NF).…”

Section: Methodsmentioning

confidence: 99%

Formulation and Preparation of Water-In-Oil-In-Water Emulsions Loaded with a Phenolic-Rich Inner Aqueous Phase by Application of High Energy Emulsification Methods

Niknam

Escudero

Benito

2020

Foods

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Currently, industry is requesting proven techniques that allow the use of encapsulated polyphenols, rather than free molecules, to improve their stability and bioavailability. Response surface methodology (RSM) was applied in this work to determine the optimal composition and operating conditions for preparation of water-in-oil-in-water (W/O/W) emulsions loaded with phenolic rich inner aqueous phase from olive mill wastewater. A rotor-stator mixer, an ultrasonic homogenizer and a microfluidizer processor were tested in this study as high-energy emulsification methods. Optimum results were obtained by means of microfluidizer with 148 MPa and seven cycles input levels yielding droplets of 105.3 ± 3.2 nm in average size and 0.233 ± 0.020 of polydispersity index. ζ-potential, chemical and physical stability of the optimal W/O/W emulsion were also evaluated after storage. No droplet size growth or changes in stability and ζ-potential were observed. Furthermore, a satisfactory level of phenolics retention (68.6%) and antioxidant activity (89.5%) after 35 days of storage at room temperature makes it suitable for application in the food industry.

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“…As reported in a recent study [ 26 ], the further acidification causes a destabilization of the suspension by modifying the zeta potential with subsequent easier flocculation of suspended solids.…”

Section: Resultsmentioning

confidence: 93%

Photoactive Gel for Assisted Cleaning during Olive Mill Wastewater Membrane Microfiltration

2017

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A photoactive gel has been fabricated on the surface of polyethylene membranes for enhancing the fouling resistance during olive mill wastewater treatment. Light and pH responsive materials have been introduced in the membrane surface through the build up of a layer-by-layer pattern, which is formed by photocatalytic nanoparticles and ionic polyelectrolytes. The best working conditions to contrast foulants adsorption have been explored and identified. Repulsive interfacial forces and assisted transfer of foulants to catalytic sites have been envisaged as crucial factors for contrasting the decline of the flux during microfiltration. Tests in submerged configuration have been implemented for six continuous hours under irradiation at two different pH conditions. As a result, a worthy efficiency of the photoactive gel has been reached when suitable chemical microenvironments have been generated along the shell side of the membranes. No additional chemical reagents or expensive back-flushing procedures have been necessary to further clean the membranes; rather, fast and reversible pH switches have been enough to remove residues, thereby preserving the integrity of the layer-by-layer (LBL) complex onto the membrane surface.

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Study of OMWWs suspended solids destabilization to improve membrane processes performance

Cited by 29 publications

References 16 publications

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

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

Formulation and Preparation of Water-In-Oil-In-Water Emulsions Loaded with a Phenolic-Rich Inner Aqueous Phase by Application of High Energy Emulsification Methods

Photoactive Gel for Assisted Cleaning during Olive Mill Wastewater Membrane Microfiltration

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