Abstract

The current paper uses a mathematical model to assess the applicability of Nanofiltration membrane on demineralization of Tigris river water. The main aim is to predict the rejection values of multiple ions, with the NF membrane NF270 in a flat sheet membrane module, as well as the water permeation flow and energy consumption. To this end, the extended Nernst–Planck equation was applied in the boundary layer, while Donnan Steric Pore and Dielectric Exclusion (DSPM&DE) model was applied through the active membrane layer. Simulation results revealed that NF membrane can remove 82–99% of bivalent ions and 60–70% of monovalent ions at pressure of 5 bar. In addition, A significant decrease of specific energy consumption (e) was noted with increase of pressure and membrane length. These results suggest that the proposed NF membrane process could be applied in treating brackish water at moderate operational conditions.

中文翻译：

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巴格达市纳滤膜工艺或苦咸水处理的可靠性：模块建模和仿真

摘要

本文使用数学模型评估纳滤膜在底格里斯河水脱盐方面的适用性。主要目的是预测平板膜组件中的纳滤膜NF270对多种离子的截留值，以及水渗透流量和能耗。为此，在边界层应用扩展的能斯特-普朗克方程，而在活性膜层应用唐南立体孔和介电排斥（DSPM&DE）模型。模拟结果表明，纳滤膜在 5 bar 压力下可以去除 82-99% 的二价离子和 60-70% 的一价离子。此外，随着压力和膜长度的增加，单位能耗 (e) 显着降低。这些结果表明，所提出的纳滤膜工艺可应用于在中等操作条件下处理苦咸水。