Submerged Aerated Filter

Within the wastewater industry (SAF) Submerged Aerated Filter Technology is seen as the simplest and most cost effective method of commercial and residential sewage sanitation / waste water treatment, particularly for small to medium sized treatment plants where available land is limited, and where full time operational manning would be uneconomical. The SAF could be described as a “box of media”. It utilizes a rigid, corrugated, structured polypropylene media to give a high surface area for biomass attachment (200 ft2 per ft3). The media is arranged into cells-in-series where effluent is contacted with the fully submerged media in the presence of co-current aeration. Air enters the process below the media via fine bubble membrane diffusers, a secondary clarifier tank follows the SAF for removal of any biomass that sloughs off the media during operation.