At a proportion of approximately 80 percent, casein is the most important protein fraction in cow‘s milk. Isolated casein is a valuable raw material for a wide variety of industrial sectors. The food industry uses casein in powdered form as high-quality protein. It also has great importance as a binder for paints, for gluing plywood,as a photoresist in etching and for the manufacture of adhesives, putty, textile finishes and block stains for leather. GEA process lines support the recovery of casein by acid or rennet precipitation.