An electrodialysis metathesis (EDM) technology aimed at efficiently converting and pre-concentrating SWRO reject brine into high solubility liquid salts was proposed. In terms of process influence factors, effects of surface flow velocity, applied voltage and number of repeating units were investigated. Results showed that the applicable range of surface flow velocity should be set to 2.20–2.95 cm/s. 2 V per repeating unit seems appropriate for the operation. Increasing the number of repeating units in a certain region (≥3) would be beneficial. For the ion migration analysis at optimized conditions, it was found that the ions leakage and co-ions migration were extremely weak. In the multiple batches pre-concentrating process, the TDS values of concentrating solutions gradually increased from 0 to about 200 g/L after 72 h, and scaling phenomenon was not found. This process thus provides a suitable way for producing high concentration liquid salts with high solubility feature.

提出了一种电渗析复分解（EDM）技术，该技术旨在将SWRO废盐水有效地转化和预浓缩成高溶解度的液态盐。根据工艺影响因素，研究了表面流速，施加电压和重复单元数的影响。结果表明，表面流速的适用范围应设置为2.20-2.95 cm / s。每个重复单元2 V似乎适合该操作。在一定区域（≥3）中增加重复单元的数量将是有益的。对于优化条件下的离子迁移分析，发现离子泄漏和共离子迁移非常弱。在多批次预浓缩过程中，浓缩溶液的TDS值在72小时后从0逐渐增加到约200 g / L，并没有发现结垢现象。因此，该方法提供了生产具有高溶解度特征的高浓度液体盐的合适方法。