Abstract
The performance of pressure retarded osmosis (PRO) membrane, characterized by water and solute permeability (. A and B) and the structural parameter (. S), was analyzed by a new method designed to simulate the PRO process more closely. Compared to conventional approaches to membrane characterization using reverse osmosis (RO)/forward osmosis (FO), the newly developed method using a single PRO experiment better predicted PRO process performance, particularly when high pressure was applied on the draw side. It was clearly demonstrated that apparent B value increased with increasing draw pressure. This characterization method was also used to evaluate PRO membrane performance in the presence of organic matter, such as alginate or xanthan, in draw solutions. Organic matter in draw solutions reduced the apparent B value, which could result in less draw solute loss in PRO processes. Our experimental observations clearly suggested that PRO membrane processes should be analyzed and predicted by methods like the one presented which simulate actual PRO operating conditions, particularly the hydraulic pressure applied to draw solutions.
Original language | English |
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Pages (from-to) | 636-644 |
Number of pages | 9 |
Journal | Journal of Membrane Science |
Volume | 493 |
DOIs | |
Publication status | Published - 2015 Nov 1 |
Bibliographical note
Funding Information:This research was supported by a grant from the Fundamental R&D Program for Technology of World Premier Materials funded by the Ministry of Trade, Industry and Energy, Republic of Korea ( 10037794 ).
Publisher Copyright:
© 2015 Elsevier B.V.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
Keywords
- Apparent solute permeability coefficient
- Draw organic solution
- Draw pressure
- Power density
- Pressure retarded osmosis
ASJC Scopus subject areas
- Biochemistry
- General Materials Science
- Physical and Theoretical Chemistry
- Filtration and Separation