The aim of this study was to remove Basic Red 13 dye by electrochemical oxidation with Ti/Pt anodes and to numerically optimize the operating conditions such as current density (5–20 mA/cm²), flow rate (10–50 mL/min), initial pH (2–9) and supporting electrolyte concentration (10–100 mM) by using response surface methodology. Chemical oxygen demand analysis which was chosen as a response was performed according to closed reflux colorimetric method. Also, the effluent chloride levels were analyzed with the argentometric method. Momentary temperature, pH and electrical conductivity readings were taken with a multimeter. Although a number of possible system conditions were obtained with numerical optimization, the system operating conditions with the lowest energy consumption are considered to be optimal. From the quadratic model formed from central composite design in response surface methodology with numerical analysis, the optimum conditions were determined to be 4.38 for initial pH, 19.53 mA/cm² for current density, 40.78 mL/min for flow rate and 85.57 mM for supporting electrolyte concentration. At these optimum points, chemical oxygen demand removal efficiency was calculated as 99.98% and energy consumption values of the system were calculated as 7.91 kW h/m³ and 0.98 kW h/kgCOD. Under these conditions when an industrial system is operated, the chemical oxygen demand removal yield will be 99.98% and the approximate cost of the system will be $1.25 to treat 1 ton of wastewater.

中文翻译：

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基于去除COD的碱性红13染料在水溶液中的电化学降解研究：数值优化方法

这项研究的目的是通过用Ti / Pt阳极进行电化学氧化去除碱性Red 13染料，并在数值上优化操作条件，例如电流密度（5–20 mA / cm ²），流速（10–50 mL / min），初始pH（2–9）和支持电解质浓度（10–100 mM），方法是使用响应表面方法。根据封闭回流比色法进行化学需氧量分析，作为响应选择。此外，废水中的氯化物含量也通过银量法进行了分析。用万用表读取瞬时温度，pH和电导率读数。尽管通过数值优化获得了许多可能的系统条件，但是具有最低能耗的系统运行条件被认为是最佳的。根据在响应面方法和数值分析中由中心复合材料设计形成的二次模型，确定最佳条件为初始pH为19.53 mA / cm ^2的4.38电流密度为40.78 mL / min，流速为85.57 mM，以支持电解质浓度。在这些最佳点上，化学需氧量去除效率计算为99.98％，系统的能耗值计算为7.91 kW h / m ³和0.98 kW h / kgCOD。在这些条件下，当运行工业系统时，化学需氧量的去除率将为99.98％，处理1吨废水所需的系统成本约为1.25美元。