Dry Milling - an overview | ScienceDirect Topics
(See MILLING | Principles of Milling .) To overcome any storage problems, most larger dry milling facilities remove germ as the first step in processing. Maize is tempered with water to a moisture level of 18–24% to toughen the germ and induce differential swelling of the germ, endosperm, and pericarp for ease of separation.