The primary aim of this study is inert COD removal from leachate nanofiltration concentrate because of its high concentration of resistant organic pollutants. Within this framework, this study focuses on the treatability of leachate nanofiltration concentrate through Fenton oxidation and optimization of process parameters to reach the maximum pollutant removal by using response surface methodology (RSM). Initial pH, Fe²⁺ concentration, H₂O₂/Fe²⁺ molar ratio and oxidation time are selected as the independent variables, whereas total COD, color, inert COD and UV₂₅₄ removal are selected as the responses. According to the ANOVA results, the R² values of all responses are found to be over 95%. Under the optimum conditions determined by the model (pH: 3.99, Fe²⁺: 150 mmol/L, H₂O₂/Fe²⁺: 3.27 and oxidation time: 84.8 min), the maximum COD removal efficiency is determined as 91.4% by the model. The color, inert COD and UV₂₅₄ removal efficiencies are determined to be 99.9%, 97.2% and 99.5%, respectively, by the model, whereas the total COD, color, inert COD and UV₂₅₄ removal efficiencies are found respectively to be 90%, 96.5%, 95.3% and 97.2%, experimentally under the optimum operating conditions. The Fenton process improves the biodegradability of the leachate NF concentrate, increasing the BOD₅/COD ratio from the value of 0.04 to the value of 0.4. The operational cost of the process is calculated to be 0.238 €/g COD_removed. The results indicate that the Fenton oxidation process is an efficient and economical technology in improvement of the biological degradability of leachate nanofiltration concentrate and in removal of resistant organic pollutants.

这项研究的主要目的是从渗滤液纳滤浓缩物中惰性去除COD，因为它具有高浓度的抗性有机污染物。在此框架内，本研究的重点是通过Fenton氧化处理渗滤液纳滤浓缩物的可处理性，以及通过使用响应面方法（RSM）优化工艺参数以实现最大程度的污染物去除。选择初始pH，Fe ²⁺浓度，H ₂ O ₂ / Fe ²⁺摩尔比和氧化时间作为自变量，而选择总COD，颜色，惰性COD和UV ₂₅₄去除作为响应。根据方差分析结果，R ²发现所有响应的值都超过95％。在模型确定的最佳条件下（pH：3.99，Fe ²⁺：150 mmol / L，H ₂ O ₂ / Fe ²⁺：3.27，氧化时间：84.8 min），最大COD去除效率确定为91.4％由模型。该模型确定颜色，惰性COD和UV _254的去除效率分别为99.9％，97.2％和99.5％，而总COD，颜色，惰性COD和UV _254的去除效率分别为90％在最佳操作条件下的实验值分别为96.5％，95.3％和97.2％。Fenton工艺改善了渗滤液NF浓缩物的生物降解能力，增加了BOD _5。/ COD比率从0.04的值到0.4的值。据计算，该工艺的运营成本为_去除COD为0.238欧元/克。结果表明，Fenton氧化工艺是一种提高浸出液纳滤浓缩物生物降解性和去除抗性有机污染物的有效且经济的技术。