ABSTRACT A lab-scale electrodialysis (ED) which consisted of 11 pieces of cation-exchange membranes and 10 pieces of anion-exchange membranes was used to treat concentrated brine of Reverse osmosis (RO) membrane. The effect of operating parameters such as applied voltage, flowrate, and operating mode was investigated to measure the performance of a lab-scale ED. Three different voltages (5, 10, and 15 V) and flowrates (20, 30, and 40 L/h) were applied in order to optimize the operating conditions of the ED system. The maximum TDS removal efficiencies were 85%, 97%, and 98% for 5, 10, and 15 V, respectively. It was concluded that the desalination efficiencies were almost the same at flowrates values of 20, 30 and 40 L/h. The TDS concentration of the treated brine in the concentrate compartment rises to the highest value of 25,400 mg/L with desalination rate of 92.5% after five cycle operation. Moreover, the desalinated brine can be used as fresh water. GRAPHICAL ABSTRACT

中文翻译：

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电渗析处理反渗透膜浓缩液近零排放方法研究

摘要 采用由 11 片阳离子交换膜和 10 片阴离子交换膜组成的实验室规模电渗析 (ED) 用于处理反渗透 (RO) 膜的浓盐水。研究了操作参数（例如施加的电压、流速和操作模式）的影响，以测量实验室规模的 ED 的性能。应用三种不同的电压（5、10 和 15 V）和流速（20、30 和 40 L/h）以优化 ED 系统的操作条件。5、10 和 15 V 的最大 TDS 去除效率分别为 85%、97% 和 98%。得出的结论是，在 20、30 和 40 L/h 的流速值下，脱盐效率几乎相同。浓缩室处理后盐水的TDS浓度上升到最高值25，400 mg/L，五次循环运行后脱盐率为92.5%。此外，脱盐后的盐水可用作淡水。图形概要