BIOSTYR® Biological Aerated Filter

The Biostyr process is a high-rate upflow submerged media biologically aerated filter (BAF). The process is capable of removing COD, BOD, TSS, ammonia, and nitrates in a single process step. The process is carried out in a series of individual cells containing submerged buoyant media called Biostyrene. The incoming wastewater and air, which is injected at the base of the cell, flow cocurrently through the Biostyr cell. The Biostyrene media provide a high specific surface area where microorganisms attach and act as a filter media for suspended solids removal. The media is retained in the cells by a nozzle deck integral to the structure.

The Biostyr process can be applied for either secondary or tertiary wastewater treatment and operates at high removal rates compared to traditional activated sludge. This results in a process with a footprint that is 85-90% smaller than a conventional system.