Power generation system based on pressure retarded osmosis with a commercially-available hollow fiber PRO membrane module using seawater and freshwater

Matsuyama, Kei; Makabe, Ryo; Ueyama, Tetsuro; Sakai, H.; Saito, Keiichiro; Okumura, Tetsuya; Hayashi, H.; Tanioka, Akihiko

doi:10.1016/j.desal.2020.114805

Cited by 20 publications

(14 citation statements)

References 31 publications

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“…In addition, this PRO system, using natural seawater and fresh water, can be an energy source that contributes to the realization of a sustainable society, providing a better membrane module is developed. One of the better membrane module performances generates a power density of 6.5 W/m 2 or higher [ 7 ].…”

Section: Discussionmentioning

confidence: 99%

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Commercial Pressure Retarded Osmosis Systems for Seawater Desalination Plants

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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: Discussionmentioning

confidence: 99%

“…Similarly, natural seawater has high potential for PRO. However, the performance of commercially available membranes is insufficient to obtain useful energy by PRO with natural seawater and fresh water [ 7 , 8 , 9 ]. Many researchers have studied PRO with natural seawater and fresh water, to obtain the energy of this unused resource.…”

Section: Introductionmentioning

confidence: 99%

Commercial Pressure Retarded Osmosis Systems for Seawater Desalination Plants

et al. 2021

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“…To obtain the optimum operating conditions, the generated net power output ( W net ) must first be determined, using Equation (14) [ 38 ]:

where

and

are the pumping energy at the DS and FS sides; E p,DS , E p,FS , E G , and E px are the energy efficiencies of the DS pump, FS pump, electric generator, and pressure exchanger (PX), respectively. In this study, the values of E G = 0.9, E p,DS =0.88, E p,FS = 0.88, and E px = 0.92 were assumed based on the values in the literature [ 38 , 46 ].…”

Section: Methodsmentioning

confidence: 99%

“…Sakai et al [ 38 ] obtained 13.5 W/m 2 of power density, using a 10-inch HF PRO module. Experiments and simulation studies of PRO performance, using pilot-scale PRO HF modules under various operational conditions, have also been performed [ 35 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 ]. In previous studies [ 35 , 43 ], the module performance with volumetric-based power outputs, as well as membrane-area-based power density, was investigated, to compare the PRO performance between the two different module configurations.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Pressure-Retarded Osmosis Performance between Pilot-Scale Cellulose Triacetate Hollow-Fiber and Polyamide Spiral-Wound Membrane Modules

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“…Cellulose triacetate (CTA)-based hollow fiber (HF) membrane is therefore one of the commercially successful semipermeable membranes that has a long historical development due to its reliable excellent performances especially for drinking water production from seawater. In addition, recently, because of the versatile demands in energy consumption and environmental concerns about brine discharge as mentioned above, CTA-based HFs have caught attention for the usage of different methods, such as forward osmosis (FO) [ 23 , 24 , 25 , 26 ], pressure-retarded osmosis (PRO) [ 11 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ] and brine concentration (BC) [ 34 , 35 ] for the emerging technologies. Because their applications require optimum characteristics individually, different strategies for designing the membrane and module are required in spite of using the same CTA material.…”

Section: Introductionmentioning

confidence: 99%

Cellulose Triacetate (CTA) Hollow-Fiber (HF) Membranes for Sustainable Seawater Desalination: A Review

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Cellulose triacetate (CTA)-based hollow fiber (HF) membrane is one of the commercially successful semipermeable membranes that has had a long progress since the time the excellent semi-permeable feature of cellulose-based polymers was found in 1957. Because of the reliable and excellent performances, especially for drinking water production from seawater, CTA-HFs have been widely used as reverse osmosis (RO) membranes, especially in arid regions. In this review, recent developments and research trends on CTA-HF membranes for seawater reverse osmosis (SWRO) plants were presented. A flux analytical model, an optimization strategy for chlorine injection without losing salt rejection performance, and a module of current high performance CTA RO membranes along with its plant operation data were updated in this paper. Furthermore, a newly developed CTA-HF membrane for brine concentration (BC) application (called BC membrane) was also addressed. Finally, RO/BC hybrid operation was introduced as an effective SWRO desalination technique that enables minimizing the volume of brine disposal from the RO plant by increasing the recovery ratio and the subsequent amount of produced freshwater, without an additional energy input.

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Power generation system based on pressure retarded osmosis with a commercially-available hollow fiber PRO membrane module using seawater and freshwater

Cited by 20 publications

References 31 publications

Commercial Pressure Retarded Osmosis Systems for Seawater Desalination Plants

Commercial Pressure Retarded Osmosis Systems for Seawater Desalination Plants

Comparison of Pressure-Retarded Osmosis Performance between Pilot-Scale Cellulose Triacetate Hollow-Fiber and Polyamide Spiral-Wound Membrane Modules

Cellulose Triacetate (CTA) Hollow-Fiber (HF) Membranes for Sustainable Seawater Desalination: A Review

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