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Permeation of greywater constituents in an aquaporin based biomimetic forward osmosis membrane process: experimental performance and modeling
Author(s) -
Wang Ce,
Li Yongmei
Publication year - 2019
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.5920
Subject(s) - greywater , chemistry , forward osmosis , membrane , permeation , chromatography , osmosis , chemical engineering , permeability (electromagnetism) , sodium , reverse osmosis , environmental engineering , wastewater , organic chemistry , biochemistry , environmental science , engineering
BACKGROUND An aquaporin based biomimetic forward osmosis (FO) membrane was tested with 11 greywater constituents to evaluate the membrane performance. The effects of solute type and concentration on water flux and rejection were investigated. A model was developed to predict the rejection of greywater constituents in the FO process. RESULTS The aquaporin based biomimetic membrane (ABBM) presented high water flux (16.1–17.4 L m ‐2 h −1 ) for greywater. Inorganic ions had little effect on permeability of the ABBM. For the tested organic solutes, while lactic acid, glucose and sodium dodecyl benzene sulfonate showed a positive impact on permeability of the ABBM, sodium dodecyl sulfate had a negative effect. After the tests of 11 selected constituents in greywater, the ABBM showed good chemical stability. Steric hindrance and electrostatic interaction both governed the diffusion of feed solutes through the ABBM. The mathematical model developed in this study accurately predicted the solute with small permeability coefficient (B p value <3 L m ‐2 h −1 ) transport through the ABBM. And it was suitable for predicting the rejections of target solutes at low FS concentration (≤ 6 mmol L –1 ). CONCLUSION This study demonstrated that the ABBM could be used in greywater treatment and the developed model could contribute to greywater reuse. © 2019 Society of Chemical Industry