Sterilization of fermentation vessels by ethanol/water mixtures

Details Sterilization of fermentation vessels by ethanol/water mixtures Sterilization of fermentation vessels by ethanol/water mixtures

1991-03-20

1999-02-09

McMahon, Timothy

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Using disinfecting or sterilizing substance

422 27, 422 31, 422 32, 422 33, 426 9, 426532, 426592, A61L 218

Patent

active

058689974

ABSTRACT:
A method for sterilizing process fermentation vessels with a concentrated alcohol and water mixture integrated in a fuel alcohol or other alcohol production facility. Hot, concentrated alcohol is drawn from a distillation or other purification stage and sprayed into the empty fermentation vessels. This sterilizing alcohol/water mixture should be of a sufficient concentration, preferably higher than 12% alcohol by volume, to be toxic to undesirable microorganisms. Following sterilization, this sterilizing alcohol/water mixture can be recovered back into the same distillation or other purification stage from which it was withdrawn. The process of this invention has its best application in, but is not limited to, batch fermentation processes, wherein the fermentation vessels must be emptied, cleaned, and sterilized following completion of each batch fermentation process.

REFERENCES:
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patent: 4808526 (1989-02-01), Lawford
patent: 4845033 (1989-07-01), Tegtmeier
patent: 5167937 (1992-12-01), Harandi et al.

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