IFAS Bio Media MBBR HDPE Biofilm Carrier IFAS Bio Media | MBBR HDPE Biofilm Carrier for WWTP & ETP Product Overview This IFAS bio media is a virgin HDPE MBBR biofilm carrier for integrated fixed-film activated sludge systems in WWTP and ETP plants. With 800 m²/m³ specific surface area and over 95% void ratio, it boosts biomass inventory and nitrification capacity without extra tank volume, supporting municipal and industrial plants in Latin America, South America and South