Does Pressure-Retarded Osmosis Help Reverse Osmosis in Desalination?

Does Pressure-Retarded Osmosis Help Reverse Osmosis in Desalination?

In a recent study [ Parra, A. Ind. Eng. Chem. Res. 2019, 58 8 3060−3071], the design of reverse osmosis (RO) systems for desalination of water at different concentrations was studied and optimal solutions were obtained. Equipped now with a powerful tool to solve the problem, we explore its use to de...

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Veröffentlicht in:Industrial & engineering chemistry research 2021-03, Vol.60 (11), p.4366-4374
Hauptverfasser: Parra, Abdon, Noriega, Mario, Yokoyama, Lidia, Bagajewicz, Miguel
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Process Systems Engineering
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container_title Industrial & engineering chemistry research
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creator Parra, Abdon
Noriega, Mario
Yokoyama, Lidia
Bagajewicz, Miguel
description In a recent study [ Parra, A. Ind. Eng. Chem. Res. 2019, 58 8 3060−3071], the design of reverse osmosis (RO) systems for desalination of water at different concentrations was studied and optimal solutions were obtained. Equipped now with a powerful tool to solve the problem, we explore its use to determine if RO coupled with a pressure-retarded osmosis (PRO) unit can improve its economics. We present different configurations and different scenarios of RO integrated with PRO. Possible changes in electricity cost and water and salt permeability effects were also studied. We studied different scenarios of seawater desalination aided by recycled fresh water from users, as well as the limited use of low-salinity water from wells, and we present four configurations of RO-PRO aside from the pure RO case. For the cases we studied, the cost parameters we used, and the scale of the production that we chose, we conclude that PRO does not help RO, that is, the stand-alone RO always shows a lower cost per unit permeate.
doi_str_mv 10.1021/acs.iecr.0c04382
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title Does Pressure-Retarded Osmosis Help Reverse Osmosis in Desalination?
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