Town of Fishers

Wastewater Process Description

Process Description

The are six basic phases of treatment.

• Phase I: Pretreatment
  Paper, plastic and grit removal.
• Phase II: Primary Treatment
  Reduces solids, BOD (Biochemical Oxygen Demand) for the aeration in Phase III.
• Phase III: Secondary Treatment
  Aerated activated biosolid process to complete the reduction of pollutants in the waste stream.
• Phase IV: Final Clarification
  Solids separation from the finish water with a solids return system.
• Phase V: Disinfection
  Ultraviolet light exposure for cell destruction.
• Phase VI: Waste Biosolid Stabilization
  N-viro Soil, an alkaline stabilization process to create a Class A reusable material.