Kinetics and energetics trade-off in reverse osmosis desalination with different configurations

Lin, Shihong; Elimelech, Menachem

doi:10.1016/j.desal.2016.09.008

Cited by 62 publications

(25 citation statements)

References 62 publications

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“…Energy consumption in RO is primarily driven by the depressurization of water as (i) feedwater passes through the membrane into the permeate stream and (ii) the brine stream is depressurized through a series of valves before being discharged. 14,[111][112][113][114] Consequently, efforts to reduce the energy consumption focus on minimizing the hydraulic pressure required to achieve a specified water flux and maximizing recovery of mechanical energy from the brine stream prior to discharge. 112,115 The transmembrane hydraulic pressure (DP) required in RO also depends on the target water recovery or average water flux and the final osmotic pressure of the brine (p B ).…”

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.

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217

150

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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.

Self Cite

217

150

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show abstract

“…In water treatment technology, membrane separation received significant advancement in this recent years and mainly subjected to its ability to remove microbes, particles and even reducing water with high heavy metal [16]. Beside, membrane filtration has also been applied in the field of food processing [17][18][19][20][21], downstream process especially for biotechnology industry [22][23][24][25], seawater treatment or desalination process [24,[26][27][28][29][30] and many other type of separations [17,[31][32][33][34]. The main reason of choosing membrane as part of the process were usually ease of operation, minimum waste generation and relatively low power needs [35].…”

Section: Introductionmentioning

confidence: 99%

Enhanced permeation performance with incorporation of silver nitrate onto polymeric membrane

Said¹,

Jama’in²,

Sutan³

et al. 2018

JMES

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Enhancing membrane permeation is usually an important parameter in the membrane development for filtration. In this study, polysulfone membrane equipped with different concentration of silver nitrate (0.5-2.0 wt%) were fabricated by phase inversion and later be known as composite membrane (CM) followed by letter (A till F) to indicate membrane composition. This study will investigate the effect of silver nitrate concentration to membrane permeation. Membrane morphology was investigated via scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). Based on SEM examination, all composite membrane exhibits sponge-like structure otherwise FTIR for composite membrane with silver nitrate (CM B till CM E) shows additional peak at 1149.57 and 1294.24 indicating silver nitrate presence. In permeability test, composite membrane (CM C) with 1.0wt% silver nitrate achieved 22.25 L/m 2 .h of flux, the highest among all the composite membrane configuration. Thus, the result implied the addition of silver nitrate can increase permeation performance though excessive content may reduce the performance up to 50% of flux reduction. This work provides a better understanding of silver nitrate implication toward membrane permeability therefore provide an insight to any application of silver nitrate in membrane composition.

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“…In desalination, one of the major costs is energy input, and the useful output is fresh water production. Usually, there is a tradeoff between increasing the energy efficiency and increasing the fresh water production per unit membrane area (flux): larger area system (with smaller flux) generally has higher energy efficiency than a smaller system [28] (at higher flux). So, one needs to find an optimal flux and energy efficiency combination that minimizes the cost.…”

Section: Difference Between Net Power Density and Module Power Densitymentioning

confidence: 99%

Economic framework for net power density and levelized cost of electricity in pressure-retarded osmosis

et al. 2018

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Economic analysis is necessary to ascertain the practical viability of a pressure-retarded osmosis (PRO) system for power production, but high complexity and the lack of large scale data has limited such work. In this study, a simple yet powerful economic framework is developed to relate the lower bound of levelized cost of electricity (LCOE) to net power density. A set of simplifying assumptions are used to develop an inverse linear relationship between net power density and LCOE. While net power density can be inferred based on experimentally measured power density, LCOE can be used to judge the economic viability of the PRO system. The minimum required net power density for PRO system to achieve an LCOE of $0.074/kWh (the capacity-weighted average LCOE of solar PV in the U.S.) is found to be 56.4 W/m 2. Using this framework, we revisit the commonly cited power density of 5 W/m 2 to conclude that it is not economically viable because net power density would be even lower. Finally, we demonstrate that fundamental difference exists between power density and net power density, and as a result we recommend using net power density as a performance metric for PRO system.

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Kinetics and energetics trade-off in reverse osmosis desalination with different configurations

Cited by 62 publications

References 62 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

Enhanced permeation performance with incorporation of silver nitrate onto polymeric membrane

Economic framework for net power density and levelized cost of electricity in pressure-retarded osmosis

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