Abstract The present study investigates the treatment of membrane concentrate leachate by thermal-activated persulfate catalysed with Ag(I). Activation of persulfate was done by microwave/conventional heating. The persulfate activation with microwave (MW) and conventional heating (CH) processes was compared with Taguchi multi-response optimization as robust design approach. Parameters affecting the leachate concentrate treatment were determined as required energy for persulfate activation, the oxidation time and concentrations of persulfate anion and Ag(I). With multi-response optimization, maximum chemical oxygen demand (COD) removal, maximum colour removal and minimum operating costs are determined simultaneously. The optimal combination levels for multi-response characteristics were determined as power at 700 W, oxidation time at 4 min, persulfate anion concentration at 187.5 g/L and Ag(I) ion concentration at 0.5 g/l for MW and 80°C, oxidation time at 30 min, 112.5 g/L persulfate anion concentration and Ag(I) ion concentration at 0.25 g/L for CH processes. The optimum combinations were confirmed with confirmation experiments for both processes. In the MW process, COD removal of 53.3%, colour removal of 99.9% and operating cost of 25 €/L wastewater were observed, while in the CH process COD removal of 20%, colour removal of 65.4% and operating cost of 16.5 €/L wastewater were observed.

中文翻译：

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Ag (I) 催化热活化过硫酸盐降解浸出液精矿的处理效率和运行成本同时优化：微波和常规加热的比较

摘要 本研究研究了用 Ag(I) 催化的热活化过硫酸盐处理膜浓缩浸出液。过硫酸盐的活化通过微波/常规加热进行。将微波 (MW) 和传统加热 (CH) 工艺的过硫酸盐活化与田口多响应优化作为稳健设计方法进行了比较。影响浸出液浓缩物处理的参数被确定为过硫酸盐活化所需的能量、氧化时间以及过硫酸盐阴离子和 Ag(I) 的浓度。通过多响应优化，可同时确定最大化学需氧量 (COD) 去除率、最大颜色去除率和最低运营成本。多响应特性的最佳组合水平确定为 700 W 的功率、4 分钟的氧化时间、MW 和 80°C 时，过硫酸根阴离子浓度为 187.5 g/L，Ag(I) 离子浓度为 0.5 g/l，氧化时间为 30 分钟，过硫酸根阴离子浓度为 112.5 g/L，Ag(I) 离子浓度为 0.25 g /L 用于 CH 进程。两个过程的确认实验证实了最佳组合。在MW工艺中，观察到COD去除率为53.3%，颜色去除率为99.9%，运行成本为25欧元/L，而在CH工艺中，COD去除率为20%，颜色去除率为65.4%，运行成本为16.5欧元观察到/L废水。两个过程的确认实验证实了最佳组合。在MW工艺中，观察到COD去除率为53.3%，颜色去除率为99.9%，运行成本为25欧元/L，而在CH工艺中，COD去除率为20%，颜色去除率为65.4%，运行成本为16.5欧元观察到/L废水。两个过程的确认实验证实了最佳组合。在MW工艺中，观察到COD去除率为53.3%，颜色去除率为99.9%，运行成本为25欧元/L，而在CH工艺中，COD去除率为20%，颜色去除率为65.4%，运行成本为16.5欧元观察到/L废水。