Clostridium acetobutylicum is a commercially valuable bacterium, included in the genus Clostridium. It is sometimes called the "Weizmann Organism", after Chaim Weizmann, who in 1916 helped discover how C. acetobutylicum culture could be used to produce acetone, butanol and ethanol from starch using the A.B.E. process (Acetone Butanol Ethanol process) for industrial purposes such as gunpowder and TNT production. The A.B.E. process was an industry standard until the late 1940's, when low oil costs drove more efficient processes based on hydrocarbon cracking and petroleum distillation techniques. C. acetobutylicum also produces acetic acid (vinegar), butyric acid (a substance that smells like vomit), carbon dioxide and hydrogen.
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