| 摘要 |
A method of producing a single cell protein material which comprises culturing under aqueous aerobic fermentation conditions at least one yeast species in an aqueous ferment employing effective amounts of carbon and energy substrate, assimilable nitrogen, and feeding a high salts concentration aqueous mineral salts medium comprising a primary mineral salts medium and a trace mineral medium to the ferment and recovering the resulting microorganisms as a single cell protein material, wherein said aqueous mineral salts medium is added to the ferment at such a rate as to maintain in the ferment the following elements in at least the designated weights, per litre of ferment: P-1.9 g, K-1 g, Mg-0.15 g, Ca-0.06 g, S-0.1 g, Fe-6 mg, Zn-2 mg, Cu-0.6 mg, and Mn-0.6 mg, and said fermentation is conducted under such conditions as to maintain a cell density of at least about 60 to 160 grams, on a dried basis, per litre of ferment. Also disclosed are novel yeast cultures having high productivity in the manufacture of single cell protein. |
