Treatment 101

Wastewater treatment/reclamation facilities:

  • Remove solids – everything from rags and plastics to sand and smaller particles found in wastewater;
  • Reduce organic matter and pollutants – naturally occurring helpful bacteria and other microorganisms consume organic matter in wastewater and are then separated from the water; and,
  • Restore oxygen – the treatment/reclamation process ensures that the water put back into our rivers or lakes has enough oxygen to support life.

Wastewater treatment/reclamation basically takes place in three stages:

  1. Primary treatment, which removes 40-60% of the solids.
  2. Secondary treatment, which removes about 90% of the pollutants and completes the process for the liquid portion of the separated wastewater.
  3. Solids Processing or Sludge Management, which treats and disposes of biosolids.

Follow along with the captions beneath the pictures below to take a virtual photo tour of a Boone County Regional Sewer District Wastewater Treatment Plant.


<strong>1. Bar Screen</strong>
<strong>2. </strong><strong>Equalization (EQ) Basin</strong>
<strong>3. Aeration Tank</strong>
<strong>4. Clarifier</strong>
<strong>5. Digester or Sludge Storage Basin</strong>
<strong>6. Excess Biosolid or Sludge Removal</strong>
<strong>7. Ultraviolet Disinfection</strong>
1. Bar ScreenPrimary Treatment - Upon arrival via the sewer collection system, the wastewater is sent through a bar screen, which removes large solid objects such as sticks and rags. All the collected debris from the bar screen is disposed of at a sanitary landfill or recycled.

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