The present technology provides a process comprising: subjecting flocculated thin stillage comprising stillage solids and a polymer flocculent to a barrel screen to separate a liquid stream from a solids stream, wherein the solids stream comprises flocs of the polymer flocculant and the stillage solids； combining the solids stream with an effective amount of a demulsifier and/or inorganic particles to form a treated solids mixture； aging the treated solids mixture for a period of time at a temperature of 160 to 212° F. to form an aged solids mixture； and separating oil and water from the aged solids mixture to provide a high protein cake comprising at least 35% dry weight crude protein.
