In Norway, the climate is of great importance when designing wastewater treatment plants. The temperature of the wastewater can become as low as 4-5°C in wintertime and the wastewater is quite dilute. In Norway the majorities of the nitrogen removal plants are based on the MBBR process. There are several reasons for this, though some of the main reasons are that the process has proved to be stable at low temperatures as well as compact and easily combined with different types of sludge separation systems.
Our engineers have a unique experience and knowhow in designing, constructing and operating nitrogen removal plants using various types of technologies.
Selected References WWTP
FARA WWTP
New state of the art treatment plant for Fredrikstad og Hvaler
Design Load
Qdim: 2170 m³/h
Qmax: 6600 m³/h
TN: 1500 kg/d
TP: 167 kg/d
BOD: 6200 Kg/d
Technologies
Pumping station
Pre-treatment
MBBR
Dissolved air flotation
CoMag system
Effluent Requirements
TN: 85% removal or 6 mg/l
TP: 95% removal or 0,2 mg/l
BOD: 80% removal or 25 mg/l
Project Data
Awarded: 2022
Completion: 2027
HIAS WWTP
New BIO-P removal Process
Design Load
PE:200 000 (2050)
Qmaxdim:1 800 m³/h
BOD:11 907 kg/d
TP: 230 kg/d
Technologies
Pre-treatment (existing)
HIAS Process
Flocculation
Disc filtration
Effluent Requirements
TP: 95% removal
BOD: 70% removal or 25 mg/l
Project Data
Awarded: 2018
Completion: 2020
UGRA WWTP
New State of the art treatment plant for Ullensaker Municipality
Design Load
PE: 125 000
Qmaxdim: 1 900 m³/h
BOD: 7470 kg/d
TN: 1530 kg/d
Technologies
Pumping station
Pre-treatment
MBBR
Dissolved air flotation
Sand filtration
Effluent Requirements
TN: 70 %removal
TP: 98% removal
BOD: 70% removal or 25 mg/l
Project Data
Awarded: 2020
Completion: 2025
