FIELD: biotechnology, food and medicinal industry, fodder production. SUBSTANCE: protein biomass is prepared by submerged culturing the strain Pleurotus ostreatus 2-204 VKPM F-811 on nutrient medium under aeration condition and the following separation of biomass. Removal-addition method of culturing is used preferably for 60 h involving culture removal in the amount 40-50% of total cultural fluid volume. Method ensures to obtain biomass with high protein content and some physiologically active substances (unsaturated fatty acids and complete set of mineral macroelements and trace elements in easily assimilable form that activates the function of many enzyme systems of human body. EFFECT: improved method of preparing. 2 cl, 1 dwg, 1 tbl, 2 ex
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