A process of fermentation of starch-containing cereal materials, such as a process of producing high protein biomass from starch-containing cereal materials by yeast strains, includes following steps: producing glucose for use as a substrate from starch-containing cereal materials by liquefaction and saccharification； selecting yeast strains which produce high protein biomass and storing the selected yeast strains； and producing high protein biomass from yeast strains by using the glucose produced, optionally in combination with molasses. The produced high protein biomass is useful in animal husbandry, especially for pig, aquatic, poultry, and large-scale animal husbandry on an industrial scale. The produced high protein biomass can replace antibiotics in the livestock industry, thereby reducing imports of products from abroad.
