| 摘要 |
A process for preparing a high protein food comprises: (a) providing an inoculant of aerobic micro-organism cells, water and oxygen; (b) supplying to said inoculant a feed mixture comprised of (1) C1 to C35 n-hydrocarbons containing less than 0.1 weight per cent aromatics in an aqueous growth medium containing as its essential components water, a nitrogen compound, a phosphorus compound and water soluble inorganic salts of sodium, potassium, magnesium, calcium, iron and manganese, and (2) an oxygen containing gas to form a biosynthesis bath; (c) establishing and maintaining in said biosynthesis bath an upper froth zone wherein the weight ratio of froth micro-organisms to froth hydrocarbons exceeds 1.0 to 1, and a lower slurry zone; (d) establishing and maintaining in said biosynthesis bath a weight ratio of micro-organism cells in said froth to micro-organism cells in said slurry in excess of 1.0 to 1; (e) establishing and maintaining in said biosynthesis bath a weight ratio of hydrocarbons in said froth to hydrocarbons in said slurry of less than 2 to 1; (f) removing a froth mixture of micro-organism cells, aqueous growth medium and unconverted hydrocarbons from said froth zone; (g) separating micro-organism cells from the remainder of said froth mixture, and (h) drying the separated micro-organism cells to obtain directly a high protein food. The exemplified micro-organism is Micrococcus cerificans; others specified are the bacteria Pseudomonas methanica, Pseudomonas fluorescens, Pseudomonas desmolyticum, Pseudomonas aeruginosa, Arthrobacter globiforme, Nocardia opaca, Nocardia rubra, and the yeasts Torulopsis magnolia and Candida albicans. A suitable apparatus is described and illustrated.
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