Continuous process for the production of yeast

Claim 1

A CONTINUOUS PROCESS FOR GROWING YEAST UNDER CONDITIONS OF AERATION IN A LIQUID NUTRIENT MEDIUM IN AT LEAST TWO FERMENTATION VESSELS WHICH COMPRISES INTRODUCING INTO THE FIRST VESSEL YEAST, NUTRIENTS AND WATER, CONTINUING THE GROWTH OF THE YEAST AND THE ADDITION OF NUTRIENTS AND WATER UNTIL A QUANTITY OF YEAST AND MEDIUM IN THIS VESSEL HAS BEEN REACHED, THEREAFTER CONTINUING TO ADD NUTRIENTS AND WATER TO THE FIRST VESSEL AND CONTINUING TO GROW YEAST THEREIN, WHILE MAINTAINING THE VOLUME OF ITS CONTENTS AND CONCENTRATION OF YEAST CELLS CONSTANT BY TRANSFERRING TO THE SECOND VESSEL YEAST-CONTAINING MEDIUM AT A RATE EQUAL TO THE RATE OF ADDITION OF NUTRIENTS AND WATER, ADDING NUTRIENTS AND WATER TO THE SECOND VESSEL UNTIL A QUANTITY OF YEAST AND MEDIUM IN THIS VESSEL HAS BEEN REACHED AND THEREAFTER CONTINUING TO ADD NUTRIENTS AND WATER AND CONTINUING TO GROW YEAST THEREIN WHILE MAINTAINING THE VOLUME OF ITS CONTENTS AND CONCENTRATION OF YEAST CELLS CONSTANT BY WITHDRAWING YEAST-CONTAINING MEDIUM AT A RATE EQUAL TO THE RATE OF ADDITION OF THE NUTRIENTS, WATER AND YEAST-CONTAINING MEDIUM AND REPEATING THE PROCESS OF THE SECOND VESSEL IN ANY OTHER FERMENTATION VESSELS PRESENT BEFORE PASSING YEAST-CONTAINING MEDIUM WITHDRAWN FROM THE FINAL FERMENTATION VESSEL INTO A FURTHER VESSEL WHERE YEAST RIPENING CONDITIONS ARE MAINTAINED AND THEREAFTER RECOVERING THE YEAST CELLS, THE CONDITIONS OF FERMENTATION IN THE FERMENTATION VESSELS AND RATE OF TRANSFER BEING SO CONTROLLED AS TO PROVIDE A GROWTH MODULUS IN THE RANGE OF 0.05 TO 0.20.