UPP-DeniFiltrera
Deep-bed denitrification filter
Biological denitrification · chemical phosphorus removal · filtration
Biological denitrification, chemical phosphorus removal and filtration combined in a single tertiary process.
Nitrite and nitrate nitrogen, total phosphorus and suspended solids are removed together. Effluent NOx-N below 3 mg/L is achievable.
A carbon source and, where phosphorus removal is required, a coagulant are dosed ahead of the filter in a rapid-mix stage. The bed operates at constant water level; as headloss builds, the cell is taken through air scour, combined air-and-water backwash and water backwash, then returned to service.
Backwash water is drawn from the filtered water tank and the backwash waste is returned to the head of the plant.
Performance
- Effluent NOx-N < 3 mg/L
- Simultaneous TP and SS removal
- Constant water level operation
- Air scour, combined and water backwash
Typical applications
- Tertiary nitrogen removal
- Surface water Class IV discharge standards
- Plant upgrades
Process arrangement
- 1 Constant level operation
- 2 Headloss rises
- 3 Air scour
- 4 Air + water backwash
- 5 Water backwash
- ↻ back into service