Toward scale-up of seawater reverse osmosis (SWRO) – pressure retarded osmosis (PRO) hybrid system: A case study of a 240 m3/day pilot plant

Lee, Sang-Ho; Park, Taeshin; Park, Yong-Gyun; Lee, Won‐Il; Kim, Seung Hyun

doi:10.1016/j.desal.2020.114429

Cited by 29 publications

(10 citation statements)

References 27 publications

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“…Bench-scale PRO membrane manufacturers include Toray, AQUAPORIN, and Polyfera. Toray manufactures 8-inch spiral PRO membrane modules at Toray Chemical Korea, a group company [ 39 ]. The A, B, and S values of this film are 1.97 L h m 2 -h-bar, 0.619 L/m 2 -h, and 0.713 mm, respectively.…”

Section: Resultsmentioning

confidence: 99%

Commercial Pressure Retarded Osmosis Systems for Seawater Desalination Plants

et al. 2021

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The development of renewable energy technologies is of global importance. To realize a sustainable society, fossil-resource-independent technologies, such as solar- and wind-power generation, should be widely adopted. Pressure retarded osmosis (PRO) is one such potential renewable energy technology. PRO requires salt water and fresh water, both of which can be found at seawater desalination plants. The total power generation capacity of PRO, using concentrated seawater and fresh water, is 3 GW. A large amount of energy is required for seawater desalination; therefore, the introduction of renewable energy should be prioritized. Kyowakiden Industry Co., Ltd., has been working on introducing PRO to seawater desalination plants since 2001 and is attracting attention for its ongoing PRO pilot plant with a scale of 460 m3/d, using concentrated seawater and treated sewage water. In this study, we evaluated the feasibility of introducing PRO in existing desalination plants. The feasibility was examined based on technology, operation, and economy. Based on the number of seawater desalination plants in each country and the electricity charges, it was determined whether the introduction of PRO would be viable.

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Section: Resultsmentioning

confidence: 99%

Commercial Pressure Retarded Osmosis Systems for Seawater Desalination Plants

et al. 2021

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“…Based on the Statkraft analyses, the minimum power density performance of the membrane should be at least 5 W/m 2 for a commercially viable PRO process [44,45]. Instead of electricity generation, the Mega-ton Water System project in Japan investigated the PRO process to produce hydraulic pressure using a hydraulic Pelton turbine in 2010 [46]. In this project, the PRO pilot plant used 460 m 3 /day of SWRO brine as the draw solution and 420 m 3 /day of treated wastewater as the feed solution [47].…”

Section: Pressure-retarded Osmosismentioning

confidence: 99%

“…In this project, the PRO pilot plant used 460 m 3 /day of SWRO brine as the draw solution and 420 m 3 /day of treated wastewater as the feed solution [47]. A hollow-fiber PRO membrane, developed by the Toyobo company, was applied, and the self-reported minimum power density was more than 12 W/m 2 , at approximately 30 bar applied hydraulic pressure [46].…”

Section: Pressure-retarded Osmosismentioning

confidence: 99%

“…An RO-PRO hybrid desalination pilot plant with a water production capacity of 240 m 3 /day was constructed and operated for more than two years to verify the long-term operation capability [47]. The developed pilot plant used SWRO brine and reclaimed wastewater for the PRO process, and two isobaric pressure exchangers were adopted to use hydraulic pressure without converting it to electricity (Figure 6) [46]. A spiral-wound PRO membrane was developed by Toray Advanced Materials, and GS E&C was responsible for developing the PRO engineering technology.…”

Section: Pressure-retarded Osmosismentioning

confidence: 99%

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Desalination Technology in South Korea: A Comprehensive Review of Technology Trends and Future Outlook

Park

Lee

2022

Membranes

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Due to advances in desalination technology, desalination has been considered as a practical method to meet the increasing global fresh water demand. This paper explores the status of the desalination industry and research work in South Korea. Desalination plant designs, statistics, and the roadmap for desalination research were analyzed. To reduce energy consumption in desalination, seawater reverse osmosis (SWRO) has been intensively investigated. Recently, alternative desalination technologies, including forward osmosis, pressure-retarded osmosis, membrane distillation, capacitive deionization, renewable-energy-powered desalination, and desalination batteries have also been actively studied. Related major consortium-based desalination research projects and their pilot plants suggest insights into lowering the energy consumption of desalination and mitigation of the environmental impact of SWRO brine as well. Finally, considerations concerning further development are suggested based on the current status of desalination technology in South Korea.

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“…Other membrane processes, such as forward osmosis (FO) 15 , membrane distillation (MD) 16 , and nanofiltration (NF) 6 , have been combined, and seawater has been directly or indirectly mixed with other available water resources to reduce the energy cost of the SWRO process. The SWRO process also has been hybridized with energy production processes, including pressure-retarded osmosis (PRO) 17 , reverse electrodialysis (RED) 18 , and microbial fuel cell (MFC) 19 , to offset the high energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Forward osmosis (FO)-reverse osmosis (RO) hybrid process incorporated with hollow fiber FO

Jeong

Jang

2021

npj Clean Water

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Currently, desalination is limited by high energy consumption and high operational and maintenance costs. In this study, a new concept of a hollow fiber forward osmosis (HFFO)-based infinity desalination process with minor environmental impacts (free-energy intake and no pretreatment or brine discharge) is suggested. To evaluate the concept, an element-scale HFFO was conducted in both conventional FO and pressure-assisted FO modes, simulating a submerged HFFO operation. In the HFFO test, the impacts of several operating conditions on the performance of the HFFO were investigated to select the best case. Based on these results, the energy costs were calculated and compared with those of a hybrid FO–seawater reverse osmosis (SWRO) process. The HFFO showed a high dilution rate of the draw solution (up to approximately 400%), allowing the downstream SWRO process to operate at 25 bar with the same permeate volume production (recovery rate of 60%). Consequently, the HFFO-based infinity desalination process has an annual energy revenue of 183.83 million USD, compared with a stand-alone two-stage RO process based on a 100,000 m3/day plant.

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Toward scale-up of seawater reverse osmosis (SWRO) – pressure retarded osmosis (PRO) hybrid system: A case study of a 240 m3/day pilot plant

Cited by 29 publications

References 27 publications

Commercial Pressure Retarded Osmosis Systems for Seawater Desalination Plants

Commercial Pressure Retarded Osmosis Systems for Seawater Desalination Plants

Desalination Technology in South Korea: A Comprehensive Review of Technology Trends and Future Outlook

Forward osmosis (FO)-reverse osmosis (RO) hybrid process incorporated with hollow fiber FO

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