Wastewater Treatment Plant
Dynea established a wastewater treatment plant 50 years ago, with an aim to reduce our environmental impact on water as much as possible. The plant has been developed through the years with new technology, also removing nutrients, such as as nitrogen and phosphorus, and improving removal rate on COD to 95%.
The Treatment Process
The treatment plant mainly consists of three treatment phases:
- Solids and fat are first separated out through sedimentation and flotation
- The water is then biologically treated with bacteria, where organic material is broken down to CO2, and nitrogen compounds are reduced to nitrogen gas
- Lastly, the water is treated chemically to improve the phosphorus removal rate and the amount of suspended solids before being discharged together with cooling water from the river
The Discharge Point
Our discharge point is Gullaugvika, close to Nordre Øyeren Nature Reserve (bird reserve). The discharge point is a popular fishing ground, counting several species of fish.
To avoid unwanted emissions to the recipient, Dynea has strict rules for introducing new raw materials and processes at site and evaluate the risk of all changes that can affect the wastewater treatment plant.
We have no violations of our strict permits from authorities since 2021.
Sediments Back in the Loop
A by-product from the biological wastewater treatment process is class 0 fertiliser. This is used as nutrient in soil mixtures.
Dynea Wastewater Treatment plant
The video is in Norwegian.
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