Wastewater Treatment

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. Bar screens remove large sized debris from the waste stream.
  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 air blowers at the bottom of the aeration basins to keep the raw wastewater filled with oxygen. As the bugs eat the waste, it is converted into carbon dioxide and water.
  4. Next, the “mixed liquor” (bugs and the cleaner wastewater) continues to the clarifiers where the bugs are separated from the water by gravity. The bugs are pumped off of the bottom and returned to the aeration basins, so they may continue to consume waste particles.
  5. The treated wastewater is sent on to the Land Application System to be pumped out to spray fields.
    On the Land Application System, the treated wastewater is disinfected with Chlorine and pumped out to various spray fields in a rotation to systematically spray it throughout the Land Application System.
  6. As the bugs consume the waste, they reproduce so that some can be sent to the digester to continue working on the solids which have resulted from the wastewater treatment.
  7. The “biosolids” travel from the digester to the dewatering facility where excess moisture is removed by centrifuges.
  8. The dewatered biosolids are then hauled to the landfill for final deposit.