1. Tertiary Treatment

2. Most common Tertiary Treatment Processes:
Tertiary treatment is defined as any treatment beyond secondary treatment.
Most common Tertiary Treatment Processes:
Further solids removal
Filtration
Nutrient Removal
Nitrogen
Phosphorous
Further Organic Removal

3. Filtration
Rapid Sand Filters
Up-flow Filters

4. Nutrient Removal Nitrogen Nitrification Autotrophic Aerobes
Nitrosomonas
2 NH O2  2 NO H2O H+
Nitrobacter
2 NO O2  2 NO3-
Denitrification
Anoxic Heterotrophs
NO3-  N2(gas)

5. Phosphorous Removal Biological Chemical Precipitation
Luxury Uptake after an anaerobic reactor
Chemical Precipitation
Al PO43-  AlPO4 (ppt

6. Natural Systems
Ponds or Lagoons
Aerobic
Facultative
Wetlands