Membrane bioreactor MBR

Membrane bioreactor (MBR) is a state-of-the art process for wastewater treatment. In the MBR, the secondary sedimentation tanks are replaced by ultrafiltration membranes. The pore size of the membranes is 0.04 µm, so in addition to suspended solids, they separate effectively colloidal materials, bacteria and microplastics. The sludge concentration in the MBR can be significantly higher than in a conventional activated sludge plant. Therefore, the foot print of the treatment plant is smaller. MBR plants have been operated successfully around the world for over twenty years, but it is not yet a common process in Nordic countries. In Finland, there are now four plants under construction, and Stockholm is renovating its treatment plant into world’s largest MBR plant.

We co-operate with German Microdyn-Nadir GmbH. The company has long experience in membrane technologies and offers wide variety of membrane products for separation processes.