DAF2 Solid Liquid Separator Machine for Food and Aquaculture Wastewater Treatment Our DAF2 Solid Liquid Separator Machine (Model DAF2-FA Series) is the upgraded dissolved air flotation system engineered for food processing and aquaculture wastewater - two of the fastest-growing effluent treatment segments in Latin America, South America and South Africa . The DAF2 removes fish-feed residues, fats, oils, proteins and suspended solids from aquaculture recirculation systems and