The study of membrane distillation used for separation of fermenting glycerol solutions

Gryta, Marek; Markowska‐Szczupak, Agata; Bastrzyk, Justyna; Tomczak, Wirginia

doi:10.1016/j.memsci.2012.12.032

Cited by 43 publications

(29 citation statements)

References 22 publications

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“…Given the advantages of high separation efficiency, low fouling propensity, and potentially low energy consumption (when low grade heat is readily available), MD can be useful for a range of applications beyond those for brackish and seawater desalination. Several studies have explored the use of MD for food processing, such as whey protein recovery in dairy processing [8], polyphenolic antioxidants from olive oil wastewater [14], and orange juice concentration [15], separation of fermentation broth [16] as well as treatment of wastewater from the textile [17] and petrochemical industries [10], and municipal water reuse [11,18].…”

Section: Introductionmentioning

confidence: 99%

Rejection and fate of trace organic compounds (TrOCs) during membrane distillation

Wijekoon

Hai

Kang

et al. 2014

Journal of Membrane Science

118

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In this study, we examined the feasibility of membrane distillation (MD) for removing trace organic compounds (TrOCs) during water and wastewater treatment. A set of 29 compounds was selected to represent major TrOC groups, including pharmaceuticals, steroid hormones, phytoestrogens, UV-filters, industrial chemicals, and pesticides that occur ubiquitously in municipal wastewater. Results reported here suggest that rejection and fate and transport of TrOC during MD are governed by their volatility and, to a lesser extent, hydrophobicity. All TrOCs with pKH > 9 (which can be classified as non-volatile) were well removed by MD. Among the 29 TrOCs investigated in this study, three compounds (i.e. 4-tertoctylphenol, 4-tert-butylphenol and benzophenone) possess moderate volatility (pKH < 9) and therefore had the lowest rejection efficiencies of 54, 73 and 66%, respectively. The results suggest that the rejection of TrOCs with pKH < 9 may be governed by the interplay between their hydrophobicity and volatility. In addition, the fate and transport of the TrOCs during the MD process was also investigated. Hydrophilic TrOCs having negligible volatility were concentrated in the feed, while hydrophobic compounds with moderate volatility were substantially lost due to evaporation or adsorption. When MD treatment was integrated with a thermophilic membrane bioreactor (MBR), near complete removal (> 95%) of all 29 TrOCs investigated in this study was achieved despite their diverse physicochemical properties (i.e. hydrophobicity, persistency and volatility). The results suggest that MD could be a promising post-treatment to be used in conjunction with thermophilic MBR for TrOC removal.

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Section: Introductionmentioning

confidence: 99%

Rejection and fate of trace organic compounds (TrOCs) during membrane distillation

Wijekoon

Hai

Kang

et al. 2014

Journal of Membrane Science

118

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“…Nonetheless, as the osmotic pressure increase, the efficiency of RO decreases. An emerging alternative is membrane distillation (MD) (Alkhudhiri et al, 2012a(Alkhudhiri et al, , 2012bAlklaibi and Lior, 2005;Angela et al, 2011;Bandini et al, 1992;Bandini and Sarti, 1999;Curcio and Drioli, 2005;Fane et al, 1987;Findley, 1967;Gostoli et al, 1987;Gryta, 2012;Gryta et al, 2013;Hausmann et al, 2012Hausmann et al, , 2013Hsu et al, 2002;Khayet et al, 2007;Khayet Souhaimi andMatsuura, 2011, Schofield et al, 1990;Tomaszewska, 2000;Van der Bruggen and Vandecasteele, 2002;Yun et al, 2006). The use of membrane distillation at a large scale is still rare; however it has the potential to concentrate the waste stream to higher solid levels than an RO process.…”

Section: Introductionmentioning

confidence: 99%

Direct contact membrane distillation for the concentration of saline dairy effluent

et al. 2015

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The ability of direct contact membrane distillation to concentrate the waste effluent from salty whey, a by-product from the cheese making industry has been investigated. The effect of trace protein in the feed, cross-flow velocity and feed acidity were the factors examined. Flat Sheet PTFE membranes of nominal pore sizes 0.05, 0.22 and 0.45 μm were utilised. A decline in feed flux in the presence of trace protein in the feed was observed, but liquid penetration through the membrane could still be prevented by utilization of a membrane of smaller pore size, to achieve a final total solids concentration of ±30% w/w with water recovery from 37 to 83 %. The pressure-drop across the channel length was also predicted accounting for the feed spacer. To increase the channel length up to 1 m will require operation using the smallest pore size of 0.05 μm, unless very low cross-flow velocities are used. The fouling of the membrane is primarily governed by precipitation of a calcium phosphate salt. However, operation at low pH does not improve the flux or the final salt concentration significantly.

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“…Commercial microporous hydrophobic polypropylene capillary membranes (Accurel ® PP S6/2, Membrana Gmbh, Wuppertal, Germany) were employed in this study. The particular membranes, characterized by satisfactory durability and overall good performance, have been widely used in various literature studies [33][34][35][36][37][38][39]. The characteristics of the membranes as provided by the manufacturer and related literature [40] are summarized in Table A1 of the Appendix A.…”

Section: Membrane Modulementioning

confidence: 99%

An Experimental and Theoretical Study on Separations by Vacuum Membrane Distillation Employing Hollow-Fiber Modules

Karanasiou

Kostoglou

Karabelas

2018

Water

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Vacuum membrane distillation (VMD) is an attractive variant of the novel membrane distillation process, which is promising for various separations, including water desalination and bioethanol recovery through fermentation of agro-industrial by-products. This publication is part of an effort to develop a capillary membrane module for various applications, as well as a model that would facilitate VMD process design. Experiments were conducted in a laboratory pilot VMD unit, comprising polypropylene capillary-membrane modules. Performance data, collected at modest temperatures (37 • C to 65 • C) with deionized and brackish water, confirmed the improved system productivity with increasing feed-water temperature; excellent salt rejection was obtained. The recovery of ethanol from ethanol-water mixtures and from fermented winery by-products was also studied, in continuous, semi-continuous, and batch operating modes. At low-feed-solution temperature (27-47 • C), ethanol-solution was concentrated 4 to 6.5 times in continuous operation and 2 to 3 times in the semi-continuous mode. Taking advantage of the small property variation in the module axial-flow direction, a simple VMD process model was developed, satisfactorily describing the experimental data. This VMD model appears to be promising for practical applications, and warrants further R&D work.

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The study of membrane distillation used for separation of fermenting glycerol solutions

Cited by 43 publications

References 22 publications

Rejection and fate of trace organic compounds (TrOCs) during membrane distillation

Rejection and fate of trace organic compounds (TrOCs) during membrane distillation

Direct contact membrane distillation for the concentration of saline dairy effluent

An Experimental and Theoretical Study on Separations by Vacuum Membrane Distillation Employing Hollow-Fiber Modules

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