DAF2 Dissolved Air Flotation Machine for ETP Algae Removal and Water Treatment Our DAF2 Dissolved Air Flotation Machine (Model DAF2-ETP Series) is the upgraded DAF clarifier for ETP (Effluent Treatment Plant) systems, water treatment plants and ecological water projects. The DAF2 excels at algae removal , river and lake purification, landscape water treatment and desalination pre-treatment, where conventional sedimentation fails due to low-density flocs. Now serving Colombia,