Direct contact membrane distillation for the concentration of clarified orange juice

Quist-Jensen, Cejna Anna; Macedonio, Francesca; Conidi, Carmela; Cassano, Alfredo; Aljlil, Saad A.; Alharbi, Omar; Drioli, Enrico

doi:10.1016/j.jfoodeng.2016.04.021

Cited by 80 publications

(31 citation statements)

References 35 publications

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“…R NaCl corresponds to the separation properties of applied membranes. The salt retention (R NaCl ) during the membrane distillation process was calculated according to Equation (2). The obtained values of R NaCl were very high, close to 100% (Table 2).…”

Section: Air-gap Membrane Distillation-separation Efficiency Of Modifmentioning

confidence: 78%

“…Membrane distillation (MD) is an emerging non-isothermal membrane separation process, being one of the promising techniques for the desalination of highly saline waters [1][2][3][4][5][6][7]. Contrary to pressure-driven techniques, the driving force in the membrane distillation process is related to the difference in chemical potential (generated by difference of temperatures) between the two sides of the hydrophobic membrane [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…In all configurations, the liquid-vapor equilibrium is the determining factor yielding to the selectivity of the MD processes. The mass transfer in MD follows three subsequent steps: liquid-vapor phase transition at the membrane pores entrance on feed side; transfer of vapors through the pores of the membrane; and condensation of vapors on the permeate side of the membrane [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Hydrophobic Ceramic Membranes for Water Desalination

et al. 2017

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Hydrophilic ceramic membranes (tubular and planar) made of TiO 2 and Al 2 O 3 were efficiently modified with non-fluorinated hydrophobic grafting molecules. As a result of condensation reaction between hydroxyl groups on the membrane and reactive groups of modifiers, the hydrophobic surfaces were obtained. Ceramic materials were chemically modified using three various non-fluorinated grafting agents. In the present work, the influence of grafting time and type of grafting molecule on the modification efficiency was evaluated. The changes of physicochemical properties of obtained hydrophobic surfaces were determined by measuring the contact angle (CA), roughness (RMS), and surface free energy (SFE). The modified surfaces were characterized by contact angle in the range of 111-132 • . Moreover, hydrophobic tubular membranes were utilized in air-gap membrane distillation to desalination of sodium chloride aqueous solutions. The observed permeate fluxes were in the range of 0.7-4.8 kg·m −2 ·h −1 for tests with pure water. The values of permeate fluxes for membranes in contact with NaCl solutions were smaller, within the range of 0.4-2.8 kg·m −2 ·h −1 . The retention of NaCl in AGMD process using hydrophobized ceramic membranes was close to unity for all investigated membranes.

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Section: Air-gap Membrane Distillation-separation Efficiency Of Modifmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydrophobic Ceramic Membranes for Water Desalination

et al. 2017

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“…The process can simultaneously produce freshwater and crystals of the dissolved salts, thus approaching zero liquid discharge without any additional post-treatment [10]. The technical potential of MD for various applications, such as desalination, environmental/waste clean-up, water reuse, and in the food and medical industry has been well-demonstrated in the literature [11][12][13].MCr has been particularly investigated for the simultaneous recovery of salts and freshwater from various types of brine solution [14][15][16]. Ji et al [17] applied MCr to recover high-purity NaCl from the reverse osmosis concentrate of real seawater.…”

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confidence: 99%

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confidence: 99%

Treatment of Wastewater Solutions from Anodizing Industry by Membrane Distillation and Membrane Crystallization

et al. 2019

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The treatment of wastewater containing various metal ions is a challenging issue in the anodizing industry. The current study investigates the application of membrane distillation/crystallization (MD/MCr) for the simultaneous recovery of freshwater and sodium sulfate from wastewater originating from a Danish anodizing industry. MD/MCr experiments were performed on supernatant from wastewater obtained after centrifugation. The effect of various feed temperatures and cross-flow velocities on flux and crystal characteristics was investigated. The crystal growth in the feed tank was monitored through the use of an online PaticleView microscope. The crystals’ morphology and form were determined by using scanning electron microscope (SEM) and X-ray powder diffraction (XRD), respectively, while inductively coupled plasma (ICP) was applied to determine the purity of the obtained crystals. The weight and dimensions of the MD/MCr unit that were required to treat the specific amount of wastewater were evaluated as a function of the feed inlet temperature. It was demonstrated that the application of MCr allows extracting high-purity sodium sulfate crystals and more than 80% freshwater from the wastewater.

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