Study on Oil Removal Characteristics According to Induced Gas Flotation (IGF) Operating Conditions

In this study, an eductor was designed and integrated into the Induced Gas Flotation (IGF) process to enhance oil removal from produced water. The eductor was specifically engineered to generate microbubbles, thereby improving gas-liquid interactions and promoting efficient oil separation. A series of experiments was conducted to investigate the effects of key operating parameters - oil concentration, salinity, recycle ratio, and water temperature - on oil removal efficiency. The results demonstrated that the highest removal efficiencies, 99.4% and 97.5%, were achieved at a salinity of 10,000 ppm and a recycle ratio of 80%, at water temperatures of 40℃ and 50℃, respectively. Among the parameters studied, salinity and water temperature were identified as the dominant factors influencing the initial stabilization and overall performance of the flotation process. These findings indicate that optimizing microbubble generation and controlling specific operating conditions can substantially enhance the efficiency of IGF systems.