Olive oil mill wastewater (OMW) is environmentally hazardous not only because it contains high recalcitrant and toxic compounds, but also due to its high organic load and turbidity. In this study, oxidation of OMW by microwave (MW)‐activated persulfate is investigated. Box–Behnken design is applied to investigate the effects of operating conditions on operating cost, organic matter, and color removal. Multi response optimization is performed according to minimum operating cost, maximum organic matter and color removal efficiencies. At optimum conditions (persulfate anion dose of 266 g L⁻¹, oxidation duration of 23.58 min, MW power of 567 W, and initial pH 2), chemical oxygen demand (COD) removal of 63.38%, color removal of 94.85%, and operating cost of 0.0633 Euro/g total organic carbon (TOC) removal are found. The biochemical oxygen demand (BOD₅)/COD ratio is increased from 0.144 to 0.285. Results of Pareto analysis show individual effect of MW power is 92.81% for TOC removal, 15.52% for color removal, 68.99% for operating cost, respectively. According to the results, it is not recommended to use this process as an ultimate treatment unit due to the high amount of oxidizing agent consumed. Instead, it is recommended to be used as a pre‐ or post‐treatment step.

中文翻译：

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微波活化过氧化氢在橄榄油厂废水中的响应面建模与优化

橄榄油厂废水（OMW）不仅对环境有害，不仅因为它含有高难降解性和有毒化合物，还因为其有机负荷和浊度高。在这项研究中，研究了微波（MW）活化的过硫酸盐对OMW的氧化作用。Box–Behnken设计用于研究运行条件对运行成本，有机物和颜色去除的影响。根据最小的运行成本，最大的有机物和脱色效率执行多响应优化。在最佳条件下（过硫酸盐阴离子剂量为266 g L ^-1，氧化时间为23.58分钟，MW功率为567 W，初始pH为2），化学需氧量（COD）去除率为63.38％，颜色去除率为94.85％，运行成本为0.0633欧元/克总有机碳（TOC）找到删除。生化需氧量（BOD ₅）/ COD比从0.144增加到0.285。帕累托分析的结果表明，去除TOC的MW功率的个体影响分别为92.81％，去除颜色的15.52％和运行成本的68.99％。根据结果​​，由于消耗大量氧化剂，不建议将该方法用作最终处理装置。相反，建议将其用作预处理或后处理步骤。