Submerged Aerated Filters consists of a series of cells containing buoyant media retained by a screen with air distribution fed from a blower. Because there is no limitation on air flow through the media, it is possible to use media with higher surface area per unit volume than in trickling filters.

Bioball and Biomarble media have proved highly efficient in SAFs.

The media can be selected to provide a protected area for nitrifying and denitrifying bacteria and similar species.

Advantages of Warden Biomedia

  • Buoyant media

  • High removal efficiencies

  • Maximised surface area per unit volume

  • High organic loadings