The capacity at Bekkelaget treatment facility shall be expanded to double capacity. After the expansion has been carried out, there will be the capacity to receive waste water from 490 000 person equivalents (pe) and, including rain water/melted snow, the facility shall be able to treat approx. 85 000 000 m3 sewage water per annum.
Incoming waste water with a flow of up to 3.5 m3/s will be able to be treated biologically in a total of eight bio-basins, of which four basins are new. An increasing flow of the sewage amounts over 3.5 m3/s up to 7.0 m3/s will be treated with direct precipitation over new primary settling basins and lead directly to a new emission pipeline. The new emission pipeline was installed in the Midgardsormen project. At times of heavy precipitation amounts above 7.0 m3/s, the waste water will be lead to this emission pipeline via a sieving station, which was established in the mentioned project.
The sludge treatment will be completed with 2 new rotten tanks, a new sludge building and a new fat station. Some alterations will be made in the existing sludge building and parts of the dewatering and heat recovery equipment shall be replaced. The biogas that is produced will be led into the existing gas processing for upgrading to fuel quality. A new torch will be applicable.
The contract includes all the machine and process engineering installations in the expanded treatment facility at Bekkelaget, and it is divided into the following areas:
1. Primary treatment;
2. Biological cleaning stage;
3. Post treatment;
4. Sludge treatment;
5. Other machine technical equipment, including replacing and upgrading existing equipment.
The contract does not include electro, heating/ventilation/sanitation (HVAC) or control/regulation/monitoring (CRM), which will mostly be contracted separately in joint contracts. However, the machine contract will include individual components that are included in the above mentioned disciplines for some process units. In addition there will be different deliveries for the building, which will vary according to the type of process section and the date of execution. These deliveries and the machine contract's final extent will be stated in the tender documentation.