Electrocoagulation has been widely studied in oily wastewater treatment because of its high demulsification efficiency and no secondary reagent is required. Oil removal largely depends on the properties of the aggregates. This study aimed to explore the growth process of aggregates and oil removal near the anode by electrocoagulation. Four factors, current density, solution temperature, initial pH value, and electrode structure, were investigated. According to the findings, the current density and temperature have the most significant influence on the growth process of aggregates. The oil removal rate depends more on the average particle size than the fractal dimension. The results showed that the current density and solution temperature have the most significant influence on the parameters of the electrocoagulation process. With increasing current density, the aggregate growth rate and average particle size entering the stable period were accelerated, and the oil removal efficiency was promoted. The growth of aggregates was retarded at high temperatures. The change in the scope of the fractal dimension was minor, ranging from 1.65 to 1.84, during the growth process of the aggregates. Foamed aluminium electrodes were beneficial for accelerating aggregate growth instead of aluminium plates, but the energy consumption was obviously increased. The relationship between the mean particle size and mean fractal dimension of aggregates is consistent with the power function. From the point of view of aggregate growth, this study forms the basis for an in-depth understanding of the demulsification mechanism.

电絮凝因其破乳效率高且不需要二次试剂而在含油废水处理中得到了广泛的研究。除油很大程度上取决于骨料的特性。本研究旨在探讨电凝聚阳极附近聚集体的生长过程和除油情况。研究了电流密度、溶液温度、初始pH值和电极结构四个因素。研究结果表明，电流密度和温度对聚集体的生长过程影响最为显着。除油率更多地取决于平均颗粒尺寸而不是分形维数。结果表明，电流密度和溶液温度对电絮凝过程的参数影响最为显着。随着电流密度的增加，聚集体生长速度和进入稳定期的平均粒径加快，除油效率提高。高温下聚集体的生长受到抑制。在聚集体生长过程中，分形维数变化幅度较小，为1.65~1.84。泡沫铝电极代替铝板有利于加速聚集体生长，但能耗明显增加。聚集体平均粒径与平均分形维数之间符合幂函数关系。从聚集体增长的角度来看，本研究为深入了解破乳机理奠定了基础。