This study considers the effect of cross-flow velocity and transmembrane pressure on flux and rejection behavior during nanofiltration of Eurasian water milfoil hydrolysate. Fractionation by nanofiltration was applied to obtain a glucose-rich permeate solution and a concentrated retentate solution of other sugars and phenolics. Nanofiltration was performed in a cross-flow rectangular flat-sheet cell (MaxiMem, Prozesstechnik GmbH). Membrane Microdyn Nadir™ NP030 with molecular weight cut-off 500 Da was used. The velocity and shear stress distribution on the membrane surface was modelled by CFD simulations. Mild hydrodynamic conditions (cross-flow velocity and pressure) are recommended based on the observed permeate flux and rejection difference between the targeted groups of compounds. The results are discussed in rapport with existing experimental observations in the literature.

本研究考虑了横流速度和跨膜压力对欧亚水三叶草水解产物纳滤过程中通量和截留行为的影响。通过纳滤进行分级分离，以获得富含葡萄糖的渗透液和其他糖类和酚类的浓缩渗余液。纳滤是在错流的矩形平板细胞（MaxiMem，Prozesstechnik GmbH）中进行的。使用分子量截留值为500 Da的膜Microdyn Nadir™NP030。通过CFD模拟对膜表面的速度和剪切应力分布进行建模。根据观察到的渗透通量和目标化合物组之间的截留差异，建议温和的流体动力学条件（错流速度和压力）。