Dissolved Air Flotation Oil Water Separator Machine for ETP Industrial Wastewater Our Dissolved Air Flotation Oil Water Separator Machine (Model DAF-OW Series) is a customizable flotation clarifier designed for ETP (Effluent Treatment Plant) systems treating oily wastewater from chemical plants, machinery manufacturing, steel mills, metal finishing and marine industries. Unlike centrifuge oil water separators and fuel water separator bowls, our DAF system uses micro-fine air