Job Description:

• 1) Tends steam-jacketed kettles, mixing tanks, filter press, string filter, and related equipment to process ammonia solution and aluminum sulfate into aluminum hydroxide: Meters water into steam-jacketed kettle and sets thermostat at specified temperature.

• 2) Dumps preweighed bags of aluminum sulfate into kettle, and starts agitator to dissolve ingredient.

• 3) Meters specified amounts of hot water and ammonia into mixing tank and starts agitator.

• 4) Pumps aluminum sulfate solution through filter press into heated agitator tank to remove insoluble materials.

• 5) Pumps ammonia solution to tank with aluminum sulfate solution.

• 6) Ladles sample of mixture, adds test solution, and observes color reaction to determine degree of precipitation.

• 7) Adds specified ingredients to mixing tank to complete precipitation, according to results of test.

• 8) Pumps slurry through string filter to separate aluminum hydroxide from mixture.

• 9) May replace filtering media and repair equipment, using handtools.