Techno-economic evaluation of an element-scale forward osmosis-reverse osmosis hybrid process for seawater desalination

Im, Sung Ju; Jeong, Sanghyun; Jeong, Seongpil; Jang, Am

doi:10.1016/j.desal.2019.114240

Cited by 49 publications

(19 citation statements)

References 39 publications

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“…For CAPEX, the MBR cost ($0.302/m 3 ) was highest and followed by RO and UV disinfection units ($0.242/m 3 and $0.130/m 3 respectively) and FO on the application of 2 bar is $0.364/m3 while that of 6 bar is $0.395/m3 (7.9% increase). As expected, the major factors responsible for such a high OPEX cost of the plant are the energy consumption of the RO and UV units [79].…”

supporting

confidence: 61%

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An Overview on the Use of Electrolyte Solution as a Strong Osmotic Agent in Forward Osmosis

Khapekar¹,

Kadu²,

Savla³

et al. 2022

IJAR

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Forward osmosis (FO) has gained attention of people in recent decades due to its magnificent properties andless energy requirements. This paper aims to discuss various characteristics of draw solutes which are differentiated due to their performance and show exceptional results as osmotic agents in FO. Different types of membranes are being selected for different applications according to needs and requirements. Among them, CTA (Cellulose Triacetate Membrane) and TFC (Thin-film composite membrane) membranesare widely used and show higher fluxas compared to others. Responsive draw solute causes remarkable change in osmotic pressure of the diluted solution when exposed to external factors such as pH and temperature. Responsive and Non-responsive draw solutes have advantages and disadvantages on their usage in FO. Comparative study has been done which shows that as compared to the different techniques for purification, FO stands tallest in terms of economic analysis and alsoresults shown by FO are phenomenal. This review targets recent progress, challenges and opportunities concerning the development of appropriate and efficient osmotic agents with low-cost energy recovery to achieve largescale application of FO and its future development.

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supporting

confidence: 61%

“…Factors like capital expenditure (CAPEX), operational cost (OPEX), quality of water generated, reflux ratio, etc. are crucial for the practical application of these membrane technologies [79].…”

Section: Reverse Salt Fluxmentioning

confidence: 99%

An Overview on the Use of Electrolyte Solution as a Strong Osmotic Agent in Forward Osmosis

Khapekar¹,

Kadu²,

Savla³

et al. 2022

IJAR

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“…On the other hand, the typical OPEX for SWRO plants comprises power consumption, membrane replacement, waste stream disposal, chemicals, labor, and O&M cost. 33,41 Assuming an electricity cost of 0.05 $/kWh, the OPEX of SWRO plant represent a small fraction (~0.2%) of the total OPEX for coupled process and is dominated by electricity costs to run the PEM electrolyzer (~95%). To this end, we calculated the levelized cost of H2, which is ~3.81 $/kg without considering SWRO, which marginally increases to ~3.83 $/kg when cost of SWRO water is accounted for (Figure 5(d)).…”

Section: Sea Water Reverse Osmosis Coupled With Water Electrolysismentioning

confidence: 99%

Seawater electrolysis for hydrogen production: a solution looking for a problem?

Khan

Al‐Attas

Roy

et al. 2021

Energy Environ. Sci.

267

143

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“…While the above-mentioned parameters are useful to describe module performance, they do not explicitly address the economic impacts of energy consumption, especially for a large-scale system. Despite previous studies having evaluated the economic impacts [ 144 , 145 , 146 ] or total cost [ 147 ] of large-scale desalination systems, only a handful of studies have evaluated the impact of spacer design on total cost [ 148 ]. A recent techno-economic study by Toh et al [ 149 ] found that improving spacer design is more crucial than increasing permeance at same recovery, especially for SWRO systems.…”

Section: Module Performance Metricsmentioning

confidence: 99%

A Review of CFD Modelling and Performance Metrics for Osmotic Membrane Processes

et al. 2020

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Simulation via Computational Fluid Dynamics (CFD) offers a convenient way for visualising hydrodynamics and mass transport in spacer-filled membrane channels, facilitating further developments in spiral wound membrane (SWM) modules for desalination processes. This paper provides a review on the use of CFD modelling for the development of novel spacers used in the SWM modules for three types of osmotic membrane processes: reverse osmosis (RO), forward osmosis (FO) and pressure retarded osmosis (PRO). Currently, the modelling of mass transfer and fouling for complex spacer geometries is still limited. Compared with RO, CFD modelling for PRO is very rare owing to the relative infancy of this osmotically driven membrane process. Despite the rising popularity of multi-scale modelling of osmotic membrane processes, CFD can only be used for predicting process performance in the absence of fouling. This paper also reviews the most common metrics used for evaluating membrane module performance at the small and large scales.

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Techno-economic evaluation of an element-scale forward osmosis-reverse osmosis hybrid process for seawater desalination

Cited by 49 publications

References 39 publications

An Overview on the Use of Electrolyte Solution as a Strong Osmotic Agent in Forward Osmosis

An Overview on the Use of Electrolyte Solution as a Strong Osmotic Agent in Forward Osmosis

Seawater electrolysis for hydrogen production: a solution looking for a problem?

A Review of CFD Modelling and Performance Metrics for Osmotic Membrane Processes

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