A professional who tends machines that dry and grind liquid food products, such as chocolate, malt, milk, or yeast. Respnsibilities include:

• Turns valve to control flow of steam to heat drier to operating temperature and observes thermometer and pressure gauge to ensure that specified temperature and pressure are maintained.
• Installs cutting blades and screens in mill.
• Starts drier and turns valve to regulate material flow between heated revolving drums.
• Observes thickness and color of dried material sheet emerging from drums to determine moisture content of material.
• Turns screws to adjust drum speed and thickness of sheet to ensure that required dryness of material is attained.
• Turns screws to adjust knife that scrapes material off drum.
• Starts conveyor that carries dried material into mill.
• Places container at outlet of mill to catch dry, ground product.
• May be designated according to material dried and ground as Yeast-Drier Operator, Drum.