TY - JOUR
T1 - Reverse osmosis filtration for space mission wastewater
T2 - membrane properties and operating conditions
AU - Lee, Sangho
AU - Lueptow, Richard M.
N1 - Funding Information:
This work was supported by NASA (NASA grant NAG9-1053). The authors thank Ms. Karen Pickering for her support and advice regarding the filtration experiments. The authors also thank Dr. Deanna Hurum and Ms. Tanita Sirivedhin for their help in chemical analysis at the Civil and Environmental Engineering Department, Northwestern University. The authors also thank Hydranautics Inc. and Advanced Membrane Technology, Inc. for their donation of membrane samples.
PY - 2001/2/15
Y1 - 2001/2/15
N2 - Reverse osmosis (RO) is a compact process that has potential for the removal of ionic and organic pollutants for recycling space mission wastewater. Seven candidate RO membranes were compared using a batch stirred cell to determine the membrane flux and the solute rejection for synthetic space mission wastewaters. Even though the urea molecule is larger than ions such as Na+, Cl-, and NH4+, the rejection of urea is lower. This indicates that the chemical interaction between solutes and the membrane is more important than the size exclusion effect. Low pressure reverse osmosis (LPRO) membranes appear to be most desirable because of their high permeate flux and rejection. Solute rejection is dependent on the shear rate, indicating the importance of concentration polarization. A simple transport model based on the solution-diffusion model incorporating concentration polarization is used to interpret the experimental results and predict rejection over a range of operating conditions.
AB - Reverse osmosis (RO) is a compact process that has potential for the removal of ionic and organic pollutants for recycling space mission wastewater. Seven candidate RO membranes were compared using a batch stirred cell to determine the membrane flux and the solute rejection for synthetic space mission wastewaters. Even though the urea molecule is larger than ions such as Na+, Cl-, and NH4+, the rejection of urea is lower. This indicates that the chemical interaction between solutes and the membrane is more important than the size exclusion effect. Low pressure reverse osmosis (LPRO) membranes appear to be most desirable because of their high permeate flux and rejection. Solute rejection is dependent on the shear rate, indicating the importance of concentration polarization. A simple transport model based on the solution-diffusion model incorporating concentration polarization is used to interpret the experimental results and predict rejection over a range of operating conditions.
KW - Concentration polarization
KW - Rejection
KW - Reverse osmosis
KW - Water treatment
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U2 - 10.1016/S0376-7388(00)00553-6
DO - 10.1016/S0376-7388(00)00553-6
M3 - Article
C2 - 11594378
AN - SCOPUS:0035865886
SN - 0376-7388
VL - 182
SP - 77
EP - 90
JO - Journal of Membrane Science
JF - Journal of Membrane Science
IS - 1-2
ER -