Due to diff erences in the number of yeast cells and in the density of the yeast layers, turbidity measurement can be used to diff erentiate between the layers. For this purpose, an ITM-2 turbidity meter is installed at the fermentation tank outlet. It continuously measures the turbidity in % and outputs the measured value as a 4…20 mA analog signal to the process controller. By simply adjusting the setpoints, the yeast harvest can now be controlled precisely, reproducibly and automatically.
|Turbidity values in yeast layers|