Case study Tretten WWTP, Noruega
The plant treats wastewater from the municipality of Øyer in Noruega, and from a dairy that produces butter.
Design data
| Parameter |
Value |
| Total BOD7 (average) |
225 kg/d |
| Total BOD7 (max) |
22,5 kg/h |
| Design flow |
400 m³/h |
| Maximum flow |
58 m³/h |
| Design temperature |
10°C |
Effluent requirements
| Parameter |
Value |
| Phosphorous |
<0,4 mg/l |
| BOD7 |
<40 mg/l |
| TOC |
<40 mg/l |
Results
| Parameter |
Influent (mg/l) |
Effluent(mg/l) |
Reduction (%) |
| Total BOD7 |
503 |
4 |
98.9 |
The plant has performed very well since the upgrade to the Moving Bed™ biofilm process.
