Oil and grease present in wastewater pose a serious problem for aquatic life. The oil and grease layer on the water surface reduces dissolved oxygen and prevents the water surface from coming into contact with air. The layer of oil and grease that adheres to water and suspended solids decreases biological activity, thereby lowering the dissolved oxygen levels. As oxygen levels decrease, the oxidation of hydrocarbon molecules slows down. Over time, oil and grease in water may accumulate on pipe walls, leading to blockages in the system.

In wastewater, oil and grease are typically removed using DAF (Dissolved Air Flotation) systems with the help of a skimmer; however, this technique has low efficiency. Therefore, it is necessary to coagulate oil and grease molecules—attached to organic and inorganic pollutants in the water—with appropriate chemicals to make them float. In this way, they can be easily separated from the water using a skimmer.