The Unexpected Performance of Highly Permeable SWRO Membranes at High Temperatures

Franks, Rich; Chilekar, Satish; Bartels, Craig

doi:10.1179/ida.2012.4.1.52

Cited by 7 publications

(5 citation statements)

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“…The results could be fitted well with Darcy’s law, according to which water flow through a purification system is proportional to the hydraulic gradient [ 25 ]. The water permeability, plotted as a function of pressure difference shown in Figure 11 , reveals that a high degree of water permeability was achieved at a low operating pressure; these results are similar to those obtained using a commercial seawater reverse osmosis system [ 26 ]. From the data in Figure 11 , the standard deviation is 58.12, while the mean is 190.89; the low standard deviation implies the reliability of the data.…”

Section: Resultssupporting

confidence: 71%

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Fabrication of Bentonite–Silica Sand/Suspended Waste Palm Leaf Composite Membrane for Water Purification

Aljlil

2020

Membranes

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In this study, a method for fabricating tubular ceramic membranes via extrusion using economical and locally available bentonite–silica sand and waste palm leaves was developed as a tool for conducting the necessary task of purifying water polluted with oil and suspended solid materials produced via various industrial processes. The developed tubular ceramic membranes were found to be highly efficient at separating the pollutants from water. The properties of the fabricated membrane were evaluated via mechanical testing, pore size distribution analysis, and contact angle measurements. The water contact angle of the fabricated membrane was determined to be 55.5°, which indicates that the membrane surface is hydrophilic, and the average pore size was found to be 66 nm. The membrane was found to demonstrate excellent corrosion resistance under acidic as well as basic conditions, with weight losses of less than 1% in each case. The membrane surface was found to be negatively charged and it could strongly repulse the negatively charged fine bentonite particles and oil droplets suspended in the water, thereby enabling facile purification through backwashing. The obtained ceramic membranes with desirable hydrophilic properties can thus serve as good candidates for use in ultrafiltration processes.

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Section: Resultssupporting

confidence: 71%

“…Membranes 2020, 10, x FOR PEER REVIEW 11 of 17 to those obtained using a commercial seawater reverse osmosis system [26]. From the data in Figure 11, the standard deviation is 58.12, while the mean is 190.89; the low standard deviation implies the reliability of the data.…”

Section: Evaluation Of the Membrane Performance Using Artificially Produced Wastewatermentioning

confidence: 93%

Fabrication of Bentonite–Silica Sand/Suspended Waste Palm Leaf Composite Membrane for Water Purification

Aljlil

2020

Membranes

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“…High water permeability was observed for the fabricated membrane at low operating pressures. The obtained results were comparable to those from the RO process [24]. Based on Figure 8, the standard deviation (5.36) is lower than the mean (179.84), indicating that the data is reliable.…”

Section: Evaluation Of Fabricated Membrane 321 Evaluation With Synsupporting

confidence: 76%

Development of Red Clay Ultrafiltration Membranes for Oil-Water Separation

Aljlil

2021

Crystals

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In this study, a red clay/nano-activated carbon membrane was investigated for the removal of oil from industrial wastewater. The sintering temperature was minimized using CaF2 powder as a binder. The fabricated membrane was characterized by its mechanical properties, average pore size, and hydrophilicity. A contact angle of 67.3° and membrane spore size of 95.46 nm were obtained. The prepared membrane was tested by a cross-flow filtration process using an oil-water emulsion, and showed a promising permeate flux and oil rejection results. During the separation of oil from water, the flux increased from 191.38 to 284.99 L/m2 on increasing the applied pressure from 3 to 6 bar. In addition, high water permeability was obtained for the fabricated membrane at low operating pressure. However, the membrane flux decreased from 490.28 to 367.32 L/m2·h due to oil deposition on the membrane surface; regardless, the maximum oil rejection was 99.96% at an oil concentration of 80 NTU and a pressure of 5 bar. The fabricated membrane was negatively charged, as were the oil droplets, thereby facilitating membrane purification through backwashing. The obtained ceramic membrane functioned well as a hydrophilic membrane and showed potential for use in oil wastewater treatment.

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“…• C, by the increase in osmotic pressure with temperature [46]. Thus, the overall enhancement in efficiency in going from 25 to 40…”

Section: An Analysis Of Ro As a Regeneration Process For Fomentioning

confidence: 98%

On the potential of forward osmosis to energetically outperform reverse osmosis desalination

McGovern

Lienhard

2014

Journal of Membrane Science

221

116

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We provide a comparison of the theoretical and actual energy requirements of forward osmosis and reverse osmosis seawater desalination. We argue that reverse osmosis is significantly more energy efficient and that forward osmosis research efforts would best be fully oriented towards alternate applications. The underlying reason for the inefficiency of forward osmosis is the draw-dilution step, which increases the theoretical and actual energy requirements for draw regeneration. As a consequence, for a forward osmosis technology to compete with reverse osmosis, the regeneration process must be significantly more efficient than reverse osmosis. However, even considering the optimisation of the draw solution and the benefits of reduced fouling during regeneration, the efficiency of an optimal draw regeneration process and of reverse osmosis are unlikely to differ significantly, meaning the energy efficiency of direct desalination with reverse osmosis is likely to be superior.

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The Unexpected Performance of Highly Permeable SWRO Membranes at High Temperatures

Cited by 7 publications

References 0 publications

Fabrication of Bentonite–Silica Sand/Suspended Waste Palm Leaf Composite Membrane for Water Purification

Fabrication of Bentonite–Silica Sand/Suspended Waste Palm Leaf Composite Membrane for Water Purification

Development of Red Clay Ultrafiltration Membranes for Oil-Water Separation

On the potential of forward osmosis to energetically outperform reverse osmosis desalination

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