BIOSTYR® BAF (+ MBBR)

The BIOSTYR process is a biological aerated filter (BAF) with a submerged media bed. Wastewater flows upward through the media bed. Air is injected through an air grid located below the bed at the bottom of the cell and rises upward concurrently with the wastewater.

The BIOSTYR media, BIOSTYRENE™, are buoyant polystyrene beads that provide the surface area for biomass attachment. The BIOSTYRENE media is retained in the BIOSTYR cell by a pre-cast concrete nozzle deck located above the media. The nozzle deck contains nozzle-type strainers that allow water and air to pass through the cell.