Osmotically assisted reverse osmosis for high salinity brine treatment

Bartholomew, Timothy V.; Mey, Laura; Arena, Jason T.; Siefert, Nicholas; Mauter, Meagan S.

doi:10.1016/j.desal.2017.04.012

Cited by 152 publications

(81 citation statements)

References 28 publications

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“…While RO is significantly more efficient than thermal, phase-changebased desalination technologies such as multi-effect-distillation, its application to the desalination of high salinity brines (typically 70 000 ppm and above) is limited by the high hydraulic pressures required. 6,121,122 Novel high-salinity RO-based process designs, such as osmotically assisted RO [123][124][125] and low salt rejection RO, 126 have the potential to reduce the hydraulic pressure required to achieve high brine salinities, expanding the applicability of RO to minimal-and zero-liquid discharge processes. [127][128][129] Further work is required to overcome key challenges, including internal concentration polarization and optimal membrane spacer design, that have thus far limited the practical realization of processes in which both sides of the membrane are in contact with saline streams.…”

Section: Pressure-driven Desalinationmentioning

confidence: 99%

The relative insignificance of advanced materials in enhancing the energy efficiency of desalination technologies

Patel

Ritt

Deshmukh

et al. 2020

Energy Environ. Sci.

237

152

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Section: Pressure-driven Desalinationmentioning

confidence: 99%

The relative insignificance of advanced materials in enhancing the energy efficiency of desalination technologies

Patel

Ritt

Deshmukh

et al. 2020

Energy Environ. Sci.

237

152

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“…With the consecutive loop (or OARO) configuration introduced by Bartholomew et al and shown in Figure 10, the authors show potential to recover water from high salinity brines, such as produced water from natural gas fracking operations, much more efficiently than a comparable MVC system [23]. While their presented results are very promising, significant operational difficulties remain to be addressed.…”

Section: Consecutive Loop Cfromentioning

confidence: 63%

“…The academic work is limited to what has been done by Bartholomew et al [23] and Chen and Yip [24]. Both use the same core CFRO technology, but organize modules or stages into different configurations to accomplish different goals.…”

Section: Cfro Configurationsmentioning

confidence: 99%

“…Counterflow reverse osmosis (CFRO), which has also been called osmotically assisted reverse osmosis (OARO) [23] and cascading osmotically mediated reverse osmosis (COMRO) [24], has been shown to have the potential to be significantly more energy efficient than other brine concentration technologies, and also has the benefits of an increased operating range compared to RO. This is because CFRO's maximum recovery is not limited by the burst pressure of the RO membrane, as additional stages operating at low hydraulic pressure differences can be employed to increase the recovery ratio.…”

Section: Introductionmentioning

confidence: 99%

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Split-feed counterflow reverse osmosis for brine concentration

Bouma

Lienhard

2018

Desalination

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Brine concentration allows for increased recovery ratios in water treatment systems, reduction of waste volumes, and the production of minerals from saline brines. Existing methods of brine concentration, while robust, are often very energy intensive. Better efficiency may be possible using Counterflow Reverse Osmosis (CFRO), a membranebased, pressure-driven brine concentration technology. The present work develops a model for CFRO. Using this model, a single CFRO module is simulated and its performance characterized. Exergy destruction within a single-stage system is analyzed, which provides insights for configuring and optimizing multistaged systems. Additionally, a parametric analysis of membrane parameters provides direction for the development of CFRO-specific membranes. Two existing configurations of CFRO are discussed, and compared with a new third configuration, split-feed CFRO, which is presented here for the first time. Split-feed CFRO systems are simulated and optimized to provide guidance for system design. A variety of multistage systems operating at a range of recovery ratios are simulated, and the results compared are with existing desalination and brine concentration technologies, showing the potential for improved recovery ratios and reduced energy consumption.Keywords: brine concentration, desalination, energy efficiency, counterflow reverse osmosis, zero liquid discharge

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“…This finding provides insights into the membrane transport phenomena and also has implications for the development of high-performance membranes. The design and fabrication of composite membranes with highly porous and mechanically robust active-support interlayer is critical to achieve high water permeability and stable salt rejection for COMRO and other osmotic membrane processes that employ hydraulic pressurization, including RO, PRO, and osmotically assisted RO [61].…”

Section: Implications For Comro and Osmotic Membrane Processesmentioning

confidence: 99%

Transport and structural properties of osmotic membranes in high-salinity desalination using cascading osmotically mediated reverse osmosis

2020

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Management of high-salinity brines is a global environmental challenge. Recently, we proposed a novel cascading osmotically mediated reverse osmosis (COMRO) technology for energy-efficient hypersaline desalination. In this study, a transport model is established for COMRO. We investigate the impacts of hydraulic pressure and salinity on transport and structural properties of thin-film composite osmotic membranes in COMRO. Our results show that transport properties are not affected by transitory pressure changes on the order of hours. But on longer timescales, on the order of days, the membrane undergoes compaction/relaxation in response to pressurization/depressurization, with water and salt permeabilities declining/recovering accordingly. Importantly, the water and salt permeabilities change in the same proportion. We found that this is due to morphological changes of the active-support interlayer altering the effective membrane area. The membrane structural parameter is demonstrated to be consistent at different salinities. As salinity increases, both water and salt permeabilities increase, but salt permeability rises substantially more. Lastly, the presented transport model is validated by good agreement between experimental and predicted water fluxes. This study advances the understanding of membrane transport and structural properties in the emerging COMRO technology, and provides insights into water and salt transport for other osmotic membrane processes. inland desalination [7], landfill leachate [8], and flue gas desulfurization [9]. Prevailing desalination methods are all thermally-driven processes based on liquid-vapor phase change of water, which intrinsically requires intensive energy input (≈630 kWh/m 3) [10,11]. Reverse osmosis (RO) is the most energy-efficient method for seawater and brackish water desalination [12-14], but the current state-ofthe-art of RO is unsuitable for desalination of high-salinity brines. As

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Osmotically assisted reverse osmosis for high salinity brine treatment

Cited by 152 publications

References 28 publications

The relative insignificance of advanced materials in enhancing the energy efficiency of desalination technologies

The relative insignificance of advanced materials in enhancing the energy efficiency of desalination technologies

Split-feed counterflow reverse osmosis for brine concentration

Transport and structural properties of osmotic membranes in high-salinity desalination using cascading osmotically mediated reverse osmosis

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