Case study Gardermoen Treatment Plant, Norway
Plant for nitrogen removal using de-icing fluid as an external carbon source.
Design data
| Parameter |
Value |
| Total BOD7 |
2 680 kg/d |
| Total COD |
5 480 kg/d |
| TN |
704 kg/d |
| TP |
101 kg/d |
| TSS |
3 290 kg/d |
| Design flow |
920 m³/h |
| Maximum flow |
1 300 m³/h |
| PE |
50 000 |
| Temperature range |
5-14°C |
Effluent requirements
| Parameter |
Årsmedel |
Maximalt värde |
| Phosphorous |
<0,25 mg TP/l and 95% reduction |
1.5 mg/l |
| Nitrogen |
70% reduction |
- |
| BOD7 |
<10 mg/l and 70% reduction |
20 mg/l |
Results
| Parameter |
Influent |
Effluent |
Reduction |
| BOD7 |
180 (mg/l) |
3 (mg/l) |
98.3 (%) |
| TP |
7.06 (mg/l) |
0.17 (mg/l) |
97.6 (%) |
| TN |
45.05 (mg/l) |
7.76 (mg/l) |
82.8 (%) |
| NH4-N |
30.89 (mg/l) |
0.55 (mg/l) |
98.2 (%) |
| Temperature (°C) |
3.8-14°C |
|
|
Excellent plant performance since start-up. Total removal in 2001 was more than 80% on annual average.
