Mill Creek Wastewater Treatment Plant

Do you know where the wastewater from your home, a restaurant or a manufacturing facility ends up? Well it could end up in our local streams and rivers that wildlife and humans alike depend on to be clean. This diagram is a brief synopsis of the process that a Dalton Utilities wastewater facility goes through to ensure that we have clean rivers and streams now and in the future.

  1. Raw sewage enters from the collection system.
  2. Fine screens remove debris (pea sized or larger).
  3. In the Aeration basins, we let nature’s microorganisms (or “bugs”) go to work. The bugs in this process are aerobic and require oxygen in direct proportion to the amount of waste that is in the water. We have surface aerators in the aeration basins to keep the raw wastewater filled with oxygen. As the bugs eat, the waste is turned into carbon dioxide and water.
  4. At this plant, the “mixed liquor” (bugs and cleaner wastewater) is pumped to the membrane tank where the bugs are separated from the water by membranes. The membranes act as a very fine filter. The bugs are returned to the aeration tank, so they may eat again, and the water is sent on to disinfection.
  5. Ultraviolet disinfection is then employed which destroys any remaining organisms by sending the treated wastewater through an arrangement of ultraviolet lights.
  6. The treated wastewater will now flow by gravity to Mill Creek where it ascends down aeration cascades, which introduces oxygen into the clean water before it enters the creek.