At the Influent Pump Station, Screw Pumps lift raw sewage from the sanitary sewer system into the plant.
Preliminary (or Mechanical) Treatment removes inorganic material by using Bar Screens to exclude large objects such as sticks, rags, and trash. The Grit Basin allows heavy, sandy, or abrasive matter to settle out. These materials are collected by Grinders and Classifiers and discarded at the landfill.