Silveira Jefferson E, Zazo Juan A, Pliego Gema, Bidóia Edério D, Moraes Peterson B
Department of Environmental Technology, Faculty of Technology, University of Campinas-UNICAMP, R. Paschoal Marmo, 1888, 13484-332, Limeira, SP, Brazil,
Environ Sci Pollut Res Int. 2015 Apr;22(8):5831-41. doi: 10.1007/s11356-014-3738-2. Epub 2014 Oct 24.
Response surface methodology based on Box-Behnken (BBD) design was successfully applied to the optimization in the operating conditions of the electrochemical oxidation of sanitary landfill leachate aimed for making this method feasible for scale up. Landfill leachate was treated in continuous batch-recirculation system, where a dimensional stable anode (DSA(©)) coated with Ti/TiO2 and RuO2 film oxide were used. The effects of three variables, current density (milliampere per square centimeter), time of treatment (minutes), and supporting electrolyte dosage (moles per liter) upon the total organic carbon removal were evaluated. Optimized conditions were obtained for the highest desirability at 244.11 mA/cm(2), 41.78 min, and 0.07 mol/L of NaCl and 242.84 mA/cm(2), 37.07 min, and 0.07 mol/L of Na2SO4. Under the optimal conditions, 54.99% of chemical oxygen demand (COD) and 71.07 ammonia nitrogen (NH3-N) removal was achieved with NaCl and 45.50 of COD and 62.13 NH3-N with Na2SO4. A new kinetic model predicted obtained from the relation between BBD and the kinetic model was suggested.
基于Box-Behnken（BBD）设计的响应面方法成功应用于卫生填埋渗滤液电化学氧化操作条件的优化，以使该方法具有扩大规模的可行性。填埋渗滤液在连续分批循环系统中进行处理，其中使用涂覆有Ti/TiO₂和RuO₂薄膜氧化物的尺寸稳定阳极（DSA(©)）。评估了电流密度（毫安每平方厘米）、处理时间（分钟）和支持电解质用量（摩尔每升）这三个变量对总有机碳去除率的影响。在244.11 mA/cm²、41.78分钟和0.07 mol/L的NaCl以及242.84 mA/cm²、3分钟和0.07 mol/L的Na₂SO₄条件下，获得了最高合意度的优化条件。在最佳条件下，使用NaCl时化学需氧量（COD）去除率为54.99%，氨氮（NH₃-N）去除率为71.07%；使用Na₂SO₄时，COD去除率为45.50%，NH₃-N去除率为62.13%。提出了一个从BBD与动力学模型的关系中预测得到的新动力学模型。
