FIELD: biotechnology, microbiology. SUBSTANCE: invention proposes the strain C. acetobutylicum (VKPM B-5359) that is selected by induced mutagenesis and the following mutant clones selection on selective media. Strain C. acetobutylicum S-3716 (VKPM B-5359) accumulates 22.0 g/l solvents including 15.5 g/l n-butanol and 6.5 g/l acetone at fermentation for 36-40 h on medium containing beet-sugar molasses and mineral salts. Carbohydrate conversion to the end products is 40%. EFFECT: enhanced effectiveness of the strain proposed. 1 tbl
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