In this study, the performance of electro-peroxymonosulfate and electro-peroxydisulfate methods in biologically stabilized leachate nanofiltration concentrate treatment was investigated. To increase treatability and biodegradability of the concentrated leachate was aimed. Central composite design was applied for the optimization of process parameters and development of mathematical model. Variance analyses were performed to attain the interaction among the responses and process variables and to analyze the data. Second-order regression models were developed by Statgraphics Centurion XVI.I software program in order to estimate the removal efficiencies. Model’s correlation coefficients for COD removal through electro-peroxymonosulfate and electro-peroxydisulfate processes were determined to be 0.8769 and 0.8910, respectively, expressing conformity of the experimental data to the model. COD removal rates obtained through electro-peroxymonosulfate and electro-peroxydisulfate processes under optimum conditions (HSO₅⁻/COD ratio: 2.5, current: 1.8 A, pH: 6.4 and reaction time: 35.9 min for electro-peroxymonosulfate process and S₂O⁻²₈/COD ratio: 1.9, current: 2.1 A, pH: 5.1 and reaction time: 32.3 min for electro-peroxydisulfate process) were determined as 84.2% and 79.6%, respectively. Before advanced treatment processes, the biodegradable COD fraction of leachate nanofiltration concentrate was 12.7% and the soluble COD fraction was 78.3%. After electro-peroxymonosulfate process, biodegradable COD fraction increased to the value of 44.6% and the soluble COD fraction increased to the value of 90.5%, whereas after electro-peroxydisulfate process, biodegradable COD fraction increased to the value of 37.5% and the soluble COD fraction increased to the value of 87.4%. The results of the study showed that electro-peroxymonosulfate and electro-peroxydisulfate oxidation processes were effective treatment methods for leachate concentrates with low biodegradability.

中文翻译：

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渗滤液纳滤精矿的电活化过氧单硫酸盐和过氧二硫酸盐氧化：多响应优化

在这项研究中，研究了过氧化单硫酸盐和过氧化二硫酸盐方法在生物稳定的渗滤液纳滤浓缩物中的性能。目的是提高浓浸液的可处理性和生物降解性。中央复合设计用于过程参数的优化和数学模型的开发。进行方差分析以获取响应和过程变量之间的相互作用并分析数据。Statgraphics Centurion XVI.I软件程序开发了二阶回归模型，以估算去除效率。通过过氧化单硫酸盐法和过氧化二硫酸盐法去除COD的模型相关系数分别确定为0.8769和0.8910，表达实验数据与模型的一致性。在最佳条件下，通过过氧化单硫酸盐和过氧化二硫酸盐工艺获得的COD去除率₅ ^- / COD值：2.5，电流：1.8 A，pH值：6.4，反应时间：35.9分钟用于电过氧单过程和S ₂ ö ^-2 ₈/ COD比：1.9，电流：2.1 A，pH：5.1，反应时间：32.3分钟（对于过氧二硫酸法）分别测定为84.2％和79.6％。在进行深度处理之前，浸出液纳滤浓缩物的可生物降解的化学需氧量为12.7％，可溶性化学需氧量为78.3％。过硫酸单硫酸盐处理后，可生物降解的COD分数增加到44.6％，可溶性COD分数增加到90.5％，而过氧二硫酸硫酸处理后，可生物降解的COD分数增加到37.5％，可溶性COD分数增加到87.4％的值。研究结果表明，过氧化单硫酸盐和过氧化二硫酸盐氧化工艺是生物降解性低的浸出精矿的有效处理方法。