膜科学与技术

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Model-based assessment of nanofiltration-like forward osmosis processes

Authors： LI Zhuo, LI Shengzhe, LIU Xin, LI Weiyi

Units： Southern University of Science and Technology, School of Environmental and Engineering, Shenzhen 518000, China

KeyWords： forward osmosis; nanofiltration-like membranes; model-based assessment; nonlinear regression

ClassificationCode：

year,volume(issue):pagination： 2023,43(3):123-130

Abstract：

Development of forward osmosis (FO) for water treatment and purifying/fractionating bioproducts or organics is gaining impetus from the use of nanofiltration (NF)-like membranes. However, it remains ambiguous whether the classical FO model is applicable to the assessment of NF-like membranes and the associated FO processes. Layer-by-Layer assembly was exploited by this study to fabricate NF-like membranes and thereby implement FO processes with various multivalent salts as the draw solute. Meanwhile, mathematical descriptions for the different membrane orientations were unified by retrieving the classical FO model in terms of vectorized variables; the nonlinear model was fitted to the experimental data in an effort to obtain the mass-transfer coefficients for various draw solutes on the membrane surface or within the membrane structures and the structural parameter characterizing the substrate. The analysis indicates that, to a great extent, the classical FO model can be extended to assessing NF-like FO processes, thereby providing a theoretical tool to develop design heuristics for engineering novel FO processes.

Funds：

广东省科技项目（2017ZT07Z479）；国家自然科学基金项目（21878140）；深圳市科技项目（JCYJ20190809172011680）

AuthorIntro：

李卓（1996-），男，黑龙江双鸭山人，哈尔滨工业大学和南方科技大学联合培养硕士，研究方向为膜分离技术，E-mail：11749138@mail.sustech.edu.cn

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