Silica and silicate precipitation as limiting factors in high-recovery reverse osmosis operations

Cob, S. Salvador; Beaupin, C.; Hofs, B.; Nederlof, M.M.; Harmsen, D.J.H.; Cornelissen, Emile; Zwijnenburg, A.; Güner, Fatma Elif Genceli; Witkamp, G.J.

doi:10.1016/j.memsci.2012.07.016

Cited by 48 publications

(10 citation statements)

References 32 publications

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“…( 4)-( 7) The experimental values of membrane performance indicators are rejection and relative permeability, at around 0.99 and 0.8-0.95, respectively. The experimental results indicate that the membrane performance agrees well with the performance reported in the literature for the commonly used RO membranes in the market (Okamoto and Lienhard 2019;Pendergast and Hoek 2011;Cob et al 2012). The developed membranes can compete well with the commercial RO membranes.…”

Section: Model Verificationsupporting

confidence: 85%

Economic study for blend membrane production

2021

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Background In this work, an economic study for production reverse osmosis (RO) membrane from a blend of polyvinylchloride (PVC) with cellulose acetate (CA) was investigated. The model for predicting RO membrane performance was developed based on laboratory experimental data. The economic study was conducted to investigate the feasibility of producing blend RO polyvinylchloride/cellulose acetate (PVC/CA) membrane using a large-scale batch casting machine was developed and fabricated in workshop in the National Research Centre, Egypt. Results The cost of the prepared blend membrane using batch casting machine technique reached to 36 $/m2 for flat sheet polymeric membrane which was cheaper than the cost of sheets of commercial RO membranes. The original capital investment will be recovered in 7.5 years with estimation of machine lifetime 25 years. Conclusions The economic study revealed that the establishing small factories to produce blend membranes using the fabricated machine is a promising and will create a reasonable profit.

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Section: Model Verificationsupporting

confidence: 85%

Economic study for blend membrane production

2021

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“…Silica scaling mainly caused by the polymerization of silicate onto a membrane surface was generally recognized as a challenging issue and hard to remove due to its Si–O–Si bonds formed through dehydration. − The mitigation of silica scaling on a membrane mainly relied on pretreatment of feedwater − or the addition of antiscalants. , Recent research demonstrated that membrane surface properties, inclusive of functional groups and surface charge, are essential elements influencing silica nucleation kinetics on the membrane surface. − In particular, ionized silica species would be repelled by the negatively charged membrane surface at the initial silica nucleation, which could slow down the flux decrease resulting from silica scaling.…”

Section: Introductionmentioning

confidence: 99%

Sulfonated Reverse Osmosis Membrane Fabricated with Comonomer Having Excellent Scaling and Fouling Resistance

Mankol

Zhan

Zhao

et al. 2021

Ind. Eng. Chem. Res.

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Silica scalant and organic foulant are rapidly deposited onto the surface of a thin-film composite (TFC) reverse osmosis (RO) membrane during the desalination process. The scaling and fouling propensity of the membranes are affected by the properties of the membrane surface. In this work, a sulfonated TFC-RO membrane was prepared with a comonomer of 2,5diaminobenzenesulfonic acid (DABS) and m-phenylenediamine (MPD) through an interfacial polymerization process to promote the scaling and fouling resistance. Detailed characterization was carried out to analyze the structure and surface morphology of the fabricated TFC-RO membranes. Compared to the nascent PA TFC-RO membrane, PA-DABS membranes exhibited a smoother, negatively charged, and more hydrophilic surface and showed significantly lower flux decline in both silica scaling and combined scaling−fouling experiments. Moreover, gradient isosurfaces for the interaction indicated a sulfonic group having stronger repulsion with silicic acid than the carboxyl group. Therefore, this work provides new understanding of a simple and efficient design of RO membranes that can be used for desalination of combined mineral-silica and organic-fouling laden water.

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“…Furthermore, a major drawback in membrane technology is fouling, i.e. accumulation of unwanted material on the membrane and spacer surface (Antony et al, 2011;Baker and Dudley, 1998;Flemming, 2002;Ridgway et al, 1983;Salvador Cob et al, 2012). "Micro-sized particles, colloids, organic macromolecules can deposit and microbial cells can attach, grow and form biofilms on the membrane and spacer surfaces and decrease the filtration performance (Flemming, 1997;Tang et al, 2011;Yiantsios and Karabelas, 2003).…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical characterization of the water flow in spacer-filled channels of spiral-wound membranes

2018

Biofouling of Membrane Systems

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Micro-scale flow distribution in spacer-filled flow channels of spiral-wound membrane modules was determined with a particle image velocimetry system (PIV), aiming to elucidate the flow behaviour in spacer-filled flow channels. Two-dimensional water velocity fields were measured in a flow cell (representing the feed spacer-filled flow channel of a spiral wound reverse osmosis membrane module without permeate production) at several planes throughout the channel height. At linear flow velocities (volumetric flow rate per crosssection of the flow channel considering the channel porosity, also described as crossflow velocities) used in practice (0.074 and 0.163 m•s-1) the recorded flow was laminar with only slight unsteadiness in the upper velocity limit. At higher linear flow velocity (0.3 m•s-1) the flow was observed to be unsteady and with recirculation zones. Measurements made at different locations in the flow cell exhibited very similar flow patterns within all feed spacer mesh elements, thus revealing the same hydrodynamic conditions along the length of the flow channel. Three-dimensional (3-D) computational fluid dynamics simulations were performed using the same geometries and flow parameters as the experiments, based on steady laminar flow assumption. The numerical results were in good agreement (0.85-0.95 Bray-Curtis similarity) with the measured flow fields at linear velocities of 0.074 and 0.163 m•s-1 , thus supporting the use of model-based studies in the optimization of feed spacer geometries and operational conditions of spiral wound membrane systems.

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Silica and silicate precipitation as limiting factors in high-recovery reverse osmosis operations

Cited by 48 publications

References 32 publications

Economic study for blend membrane production

Economic study for blend membrane production

Sulfonated Reverse Osmosis Membrane Fabricated with Comonomer Having Excellent Scaling and Fouling Resistance

Experimental and numerical characterization of the water flow in spacer-filled channels of spiral-wound membranes

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