Yeast stage tank incorporated fermentation system and method
AssigneeLee Tech LLC
InventorChie Ying Lee
Life of this patent
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Abstract
Methods of and system for growing and maintaining an optimized/ideal active yeast solution in the yeast tank and fermenter tank during the fermentation filling cycle are provided. A new yeast stage tank is used between the yeast tank and the fermenter tank allowing yeast to rapidly produce a huge amount of active young yeast cells for a fermenter during the filling period. A measurable and useful controlling factor, % DT/% Yeast by weight ratio (or “food” to yeast ratio), is used (e.g., % DT=glucose), which offers information on the health status of the yeast. The controlling factor is used to control the status of the yeast throughout the entire process.
Claims8
A fermentation process with a propagated active yeast solution from a yeast stage tank-to-fermenters comprising:
- a. transferring a first yeast solution having a yeast content less than 5 g weight per liter from a yeast tank to a yeast stage tank;
- b. propagating the first yeast solution in the yeast stage tank to a propagated active yeast solution;
- c. transferring the propagated active yeast solution from the yeast stage tank to a first fermenter tank, wherein the propagated active yeast solution has a yeast cell count >250*10{circumflex over ( )}6/ml;
- and
- d. transferring the propagated active yeast solution from the yeast stage tank to a second fermenter tank, wherein the propagated active yeast solution has a yeast cell count >250*10{circumflex over ( )}6/ml.
Dependencies are inferred from the claim text.