A professional who operates stills, pumps, and related equipment to extract and refine ammonia from ammonia liquor. Respnsibilities include:

• Adjusts feed valves to regulate flow of liquor and steam to stills and water to condensers and dephlegmator.
• Reads thermometers and gauges, adjusts valves, and regulates pumps to maintain specified temperatures and pressures to boil off waste vapors (foul vent) and ammonia.
• Pumps ammonia to saturator for mixing with water to produce liquid ammonia, and pumps ammonia to storage tanks.
• Pumps waste liquor to sewer.
• Determines amount of ammonia in waste liquor and water, using titrattion test, and adjusts temperatures and pressures to reduce loss of ammonia.
• Keeps record of pressures, temperatures, test results, and amount of liquor and steam fed to stills.
• May produce concentrated ammonia liquor by condensing vapors in water-cooled condensers.
• Cleans work area, using broom, brushes, and lime.