TY - JOUR
T1 - Evaluation of apparent membrane performance parameters in pressure retarded osmosis processes under varying draw pressures and with draw solutions containing organics
AU - Kim, Jungwon
AU - Kim, Bongchul
AU - Inhyuk Kim, David
AU - Hong, Seungkwan
N1 - 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.
PY - 2015/11/1
Y1 - 2015/11/1
N2 - 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.
AB - 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.
KW - Apparent solute permeability coefficient
KW - Draw organic solution
KW - Draw pressure
KW - Power density
KW - Pressure retarded osmosis
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U2 - 10.1016/j.memsci.2015.07.035
DO - 10.1016/j.memsci.2015.07.035
M3 - Article
AN - SCOPUS:84938054316
SN - 0376-7388
VL - 493
SP - 636
EP - 644
JO - Journal of Membrane Science
JF - Journal of Membrane Science
ER -