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비가압식 막 공정을 통한 정삼투막 성능 평가Evaluation of Forward Osmosis (FO) Membrane Performances in a Non-Pressurized Membrane System

Other Titles
Evaluation of Forward Osmosis (FO) Membrane Performances in a Non-Pressurized Membrane System
Authors
김봉철부찬희이상엽홍승관
Issue Date
2012
Publisher
한국물환경학회
Keywords
Forward osmosis; Membrane performance parameter; Solute permeability; Solute resistivity for diffusion; Water permeability
Citation
한국물환경학회지, v.28, no.2, pp.292 - 299
Indexed
KCI
Journal Title
한국물환경학회지
Volume
28
Number
2
Start Page
292
End Page
299
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/110234
ISSN
2289-0971
Abstract
The objective of this study is to develop a novel method for evaluating forward osmosis (FO) membrane performances using a non-pressurized FO system. Basic membrane performance parameters including water (A) and solute (B) permeability coefficients and unique parameter for FO membrane such as the support layer structural parameter (S) were determined in two FO modes (i.e., active layer faces feed solution (AL-FS) and active layer faces draw solution (AL-DS)). Futhermore, these parameters were compared with those determined in a pressurized reverse osmosis (RO) system. Theoretical water flux was calculated by employing these parameters to a model that accounts for the effects of both internal and external concentration polarization. Water flux from FO experiment was compared to theoretical water fluxes for assessing the reliability of those parameters determined in three different operation modes (i.e., AL-FS FO, AL-DS FO, and RO modes). It is demonstrated that FO membrane performance parameters can be accurately measured in non-pressurized FO mode. Specifically, membrane performance parameters determined in AL-DS FO mode most accurately predict FO water flux. This implies that the evaluation of FO membrane performances should be performed in non-pressurized FO mode, which can prevent membrane compaction and/or defect and more precisely reflect FO operation conditions.
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Hong, Seung kwan
공과대학 (건축사회환경공학부)
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