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Changing membrane orientation in pressure retarded osmosis for sustainable power generation with low fouling

Authors
Kim, David InhyukKim, JungwonHong, Seungkwan
Issue Date
1-7월-2016
Publisher
ELSEVIER SCIENCE BV
Keywords
Pressure retarded osmosis (PRO); Membrane orientation; Membrane fouling; PRO-RO hybrid process; Wastewater reclamation
Citation
DESALINATION, v.389, pp.197 - 206
Indexed
SCIE
SCOPUS
Journal Title
DESALINATION
Volume
389
Start Page
197
End Page
206
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/88096
DOI
10.1016/j.desal.2016.01.008
ISSN
0011-9164
Abstract
Pressure retarded osmosis (PRO) operated with active layer facing feed solution (AL-FS), in contrary to typical PRO membrane orientation (active layer facing draw solution, AL-DS), has a strong potential for sustainable power generation from salinity gradient energy with low membrane fouling. The feasibility of PRO in AL-FS mode was first examined by verifying less membrane deformation and insignificant shadow effect under pressurized PRO operation. The simulation of such PRO process showed that its low power density due to internal concentration polarization could be improved through reducing structural parameter of the support layer. Fouling experiments using synthetic wastewater clearly demonstrated that severe fouling observed with PRO operation at AL-DS was greatly reduced by switching PRO membrane orientation to AL-FS. Lastly, specific energy consumption of a PRO-RO hybrid process was assessed to be favorable in view of both power density and membrane fouling, suggesting that economically feasible power generation as well as effective water treatment can be achieved by operating PRO in the AL-FS orientation. (C) 2016 Elsevier B.V. All rights reserved.
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Hong, Seung kwan
공과대학 (건축사회환경공학부)
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