In this study, concentrated textile wastewater using NF270 membrane was further treated by thermally activated persulfate (TAP) oxidation method. First, the effluent of the textile wastewater treatment plant was treated using NF270 membrane, and the concentrated stream was obtained. Second, the TAP method was applied using the central composite design (CCD) optimization method. The steady-state permeate flux of NF270 was obtained as 3.4, 6.8, 17.4 L/m².h, respectively, for 10, 15, 20 bars pressure. COD concentration and color in concentrated stream increased from 880 mg/L and 2960 Pt-Co to 1120 mg/L and 4860 Pt-Co, respectively, when operating pressure increased from 10 to 20 bars. The results obtained from the CCD optimization method showed that the experimental and predicted values showed a good fit in both chemical oxygen demand (COD) and color removals models. The maximum experimental values of COD and color removal efficiencies were obtained 69% and 95%, respectively, at 370 K temperature, 60 mM K₂S₂O₈ concentration, and 80 min treatment time. The NF270 concentrated stream was also filtrated from the 2^nd stage of NF270 membrane after TAP treatment. The results showed that TAP degradation of concentrated stream improved the 2^nd stage of NF270 membrane flux compared without degradation. The proposed TAP method was successfully used to further the treatment of textile wastewater concentrated stream for NF270 membrane.

中文翻译：

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热活化过硫酸盐氧化法处理纺织废水的膜浓缩物管理

在这项研究中，使用 NF270 膜的浓缩纺织废水通过热活化过硫酸盐 (TAP) 氧化法进一步处理。首先，纺织废水处理厂的出水用NF270膜进行处理，得到浓缩流。其次，使用中心复合设计 (CCD) 优化方法应用 TAP 方法。NF270 的稳态渗透通量为 3.4、6.8、17.4 L/m ².h，分别表示 10、15、20 巴压力。当操作压力从 10 巴增加到 20 巴时，浓缩流中的 COD 浓度和颜色分别从 880 mg/L 和 2960 Pt-Co 增加到 1120 mg/L 和 4860 Pt-Co。从 CCD 优化方法获得的结果表明，实验值和预测值在化学需氧量 (COD) 和颜色去除模型中均显示出良好的拟合。在 370 K 温度、60 mM K ₂ S ₂ O ₈浓度和 80 分钟处理时间下，COD 和颜色去除效率的最大实验值分别为 69% 和 95% 。NF270 浓缩流也从^第二个过滤器中过滤出来。TAP处理后NF270膜的阶段。结果表明，与未降解相比，浓缩流的TAP降解提高了NF270膜通量的^第二阶段。所提出的TAP方法被成功地用于NF270膜的纺织废水浓缩流的进一步处理。