A professional who tends furnace driers, and auxiliary equipment that regenerate diatomaceous earth used as filtering medium. Respnsibilities include:

• Opens valves on storage tank to allow dry earth to mix with mud discharged from filter.
• Feels mixture and adjusts valves to obtain mixture that can be dried readily.
• Moves controls to regulate flow of mixture to furnace driers, and temperatures of furnace to ensure specified regeneration.
• Obtains samples of earth before and after regeneration for laboratory analysis.
• Turns valves to route regenerated earth to storage bins.
• Clears blockages in minglers, dust collector hoppers, and mud gauges.
• Changes and cleans pump screens.
• May be designated according to material regenerated as kieselguhr-regenerator operator.