1.     Title, Journal and Authors

 

Title : Economic analysis on environmentally sound brine disposal with RO and RO-hybrid processes

Journal : Desalination and Water Treatment

Authors : Sung Ho Chae^a, Jihye Kim^b, Young Mi Kim^c, Seung-Hyun Kim^d, Joon Ha Kim^a*

^a School of Earth Science and Environmental Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Korea

^b Water Supply Research Center, K-water Institute, Sintanjin-ro 200, Daedeok-gu, Deajeon 34350, Korea

^c Advanced Green Chemical Materials Division, Center for Membrane, Korea Research Institute of Chemical Technology, 141 Gajeongro, Yuseong, Daejeon 34114, Korea

^d Department of Civil Engineering, Kyungnam University, Changwon 631-701, Republic of Korea

 

 

2.     Summary

 

- In this study, it is analyzed that the cost variation trends of environmentally sound brine disposal system through the open outfall system and three different types of SWRO-basis processes (stand-alone SWRO, SWRO-PRO hybrid process, SWRO-MD-PRO hybrid process). And the cost factor analysis was conducted based on the statistical techniques (principal component analysis, varimax, multiple linear regression).

- It is important to set a proper impingement point for discharged brine to be diluted enough. It can be controlled by the discharge angle of pipe(θ_d), length of the pipe(L), diameter of the pipe(D), slope of the shoreline(θ_s), and local water depth(Z). And the Froude number should be large to have time for mixing process of the discharged brine.

- In a viewpoint of feed inlet volume, the total capital cost of open outfall increases regardless of the process types as Q_f increases. Stand-alone RO process topped when Rec=40% but became the lowest one among the processes when Rec=60%. Because the critical point of the pipe does not change for one fixed value of D. 

- In a viewpoint of RO recovery rate, the open outfall capital cost of RO-PRO and RO-MD-PRO processes increase without falling as Rec increases. In the case of RO process, however, the open outfall capital cost varies along with the change of Rec. Because L should be lengthened according as Rec changes. 

 

3.     Contact

 

Kiyong Kim (Undergraduate Student)

Earth Science and Environmental Engineering Concentration

Gwangju Institute of Science and Technology (GIST)

123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea

Cell: +82-10-2830-0355