Bioethanol production by inherent enzymes from rye and wheat with addition of organic farming cheese whey

► Germinated grain can be used in bioethanol production by producing in-situ enzymes. ► Rye is a suitable substrate in autoamylolytical processes for biofuel production. ► Wheat grains were no efficient for use in autoamylolytical processes. ► Nutrient cost was decreased by using cheese whey.