20180910_A simulation study with a new performance index for pressure-retarded osmosis...

1.Title, Journal and Authors

Title: A simulation study with a new performance index for pressure-retarded

osmosis processes hybridized with seawater reverse osmosis and membrane


Journal: Desalination

Authors: Sung Ho Chaea, Jangwon Seoa, Jihye Kimb, Young Mi Kimc, Joon Ha Kima,c,⁎

a School of Earth Science and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea

b Water Research Center, K-Water Research Institute, Korea, 125, Yuseong-daero 1689beon-gil, Yuseong-gu, Daejeon, Republic of Korea

c Advanced Green Chemical Materials Division, Center for Membranes, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeongro, Yuseong, Daejeon, 34114, Republic of Korea



To enhance the energy efficiency of PRO process, many kinds of hybridized processes are being studied. Before the hybridized process, SWRO is the most well-known and commercialized process. Because of these reasons, the hybridized process is analyzed by point of SWRO. However, the SWRO process in not sufficient to account for the all hybridized process.

 There are two big PRO-hybridized configurations which are SWRO-PRO and SWRO-MD-PRO. Each of processes (SWRO, MD, PRO) have different properties so it is hard to analyze. In this study, a new dimensionless number is suggested which combines the SWRO, MD, PRO’s indexes. Because, the specific energy consumption of SWRO and MD, the specific energy recovery of PRO, have the same unit.

Generally, the best operating condition of SWRO is 50% water recovery. However, in the PRO-MD-PRO process the efficiency goes up following the water recovery rate of SWRO by the Nr/c.


3. Application to research

This study gives me insight to make a new index for other process. Energy consumption and recovery are not only important factor we should concern in the hybridized process. Still lots of new dimensionless number are needed to analyze the hybridized processes.


4. Contact

Chansik Park (Integrated Ph.D. program)

Environmental Systems Engineering Lab.
Department of Environmental Science & Engineering
Gwangju Institute Science and Technology
1 Oryong-dong Buk-gu Gwangju, 500-712, Korea

Phone : +82-62-715-2461
E-mail : 14pcs@gist.ac.kr


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