Batik wastewater contains organic dyes, waxes, silicate, etc. that are environmentally problematic. Two plain waste aluminum cans were used as electrodes in a batch electrocoagulation (EC) process to remove color, chemical oxygen demand (COD), and silica from batik wastewater. Response surface methodology based on the central composite design was used to demonstrate the dependence of removal efficiency on four key process variables and possible interactions between them. The models were statistically evaluated and conditions for optimized color, COD, and silica removals were verified experimentally. Relatively stronger effects of current density were detected while interactions could be observed on the effects of pH with current density or process time. The floatation of silica scum resulted in increased removal and deviation from the model. The optimal operating conditions were achieved at a current density of 29.91 mA/cm², an initial pH of 4.51, a reaction time of 24.93 min, and a NaCl dosage of 1.03 g/L that resulted in 88.13 ± 0.51%, 70.50 ± 3.17%, and 100.00 ± 0.00% removals of color, COD, and silica, respectively. The color, COD and pH of the batik wastewater were also reduced to 33 ADMI, 100 mg/L and 6.62 to meet the respective discharge standard limits. Silica content toughened the flocs and increased their buoyancy by strongly interacting with gas bubbles to float to the surface. EC was demonstrated to be an effective and cost-effective treatment technology for the treatment of batik wastewater.

蜡染废水中含有对环境有问题的有机染料，蜡，硅酸盐等。在分批电凝（EC）过程中，使用了两个普通的废铝罐作为电极，以去除蜡染废水中的颜色，化学需氧量（COD）和二氧化硅。基于中央复合设计的响应面方法被用来证明去除效率对四个关键过程变量的依赖以及它们之间可能的相互作用。对模型进行统计评估，并通过实验验证了优化的颜色，COD和二氧化硅去除的条件。可以检测到电流密度相对较强的影响，同时可以观察到pH与电流密度或处理时间之间的相互作用。二氧化硅浮渣的漂浮导致去除的增加和与模型的偏离。^{如图2所示}，初始pH值为4.51，反应时间为24.93分钟，NaCl用量为1.03 g / L，可去除88.13±0.51％，70.50±3.17％和100.00±0.00％的颜色，COD和二氧化硅， 分别。蜡染废水的颜色，化学需氧量和pH值也分别降低至33 ADMI，100 mg / L和6.62，以满足各自的排放标准限值。二氧化硅含量通过与气泡强烈相互作用以漂浮到表面上而使絮凝物增韧并增加了浮力。事实证明，EC是一种用于处理蜡染废水的有效且具有成本效益的处理技术。