Massive environmental benefits in wetland

WBAB Wessmanbarken Vatten och Återvinning in Smedjebacken have created new wetland to filter sewage in the final phase after it has been through the sewage treatment plant. FVB was Project Manager for the technical systems.

The new wetland was put into operation in June, and WBAB will become the first in the country to process sewage using this technology.

The water in the wetland will come from the sewage treatment plant after it has been through several purification steps. But there can still be pollutants in the water which current sewage treatment plants are unable to remove completely. They can be paint or heavy metal residues. These can be absorbed through the soil and plant roots in the wetland. Plants also absorb nutrients which contribute to eutrophication of lakes and rivers that drain into Lake Mälaren. The project is therefore important to the environment and is supported by the EU (LIFE IP Rich-Waters project) and the Swedish Environmental Protection Agency to the tune of nearly SEK 5 million for its substantial environmental benefit.

FVB has been involved in several stages of creating the wetland. The company has been Project Manager for the pumping station and wetland system, along with project planning and design of the pumping station and supply pipes. The job also included a system solution and automation for process and system integration of the wetland in the existing sewage plant's process flow.

“It's been a fascinating project, in which FVB contributed to several skills areas,” says Per Stegberg.

Illustration: WBAB WessmanBarken
Vatten & Återvinning AB.

For further information, contact:
Per Stegberg, +46 (0)21-81 80 63

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