Integrated fixed film activated sludge (IFAS) process combines biofilm technology and the conventional activated sludge (AS) treatment. IFAS technology is compact, cost effective and retains high biomass concentration in the reactor.

This process uses suspended a suspended buoyant media, usually made of polypropylene (PP) or high density polyethylene (HDPE) with density close to water density (to allow the media to mix with the wastewater).

The plastic media is mixed with the wastewater and kept suspended by the help of mechanical or aeration systems.

Warden Biomedia high surface area filter media allows higher biomass retention within the IFAS process, thus increasing the process performance efficiency to remove pollutants.

A diverse range of applications can be offered by IFAS technology such as, single stage for aerobic treatment or combined with AS processes, and can promote nitrification and denitrification. It uses either fine or coarse bubble diffusers to provide complete aeration basin mixing, coupled with enhanced oxygen transfer.

Small sized media with high surface area such as Biopebble,  Biopipe+, Biotag, and Bioflo+, available in polypropylene or high density polyethylene, have a proven IFAS track record.

Advantages of Warden Biomedia

  • High surface area to increase SRT and biomass concentration for improved BOD5 removal and nitrification (>80%)

  • Large open area to prevent media blockage by fast-growing aerobic heterotrophic bio?lms under high load conditions

  • Improved oxygen mass transfer efficiency to reduce energy consumption and carbon footprint

  • Cost effective retrofitting into existing plant to upgrade effluent quality and increase treatment capacity

  • Durability and rugged with density close to water

  • Decreased biofilm shear to minimise biomass detachment

  • Low sensitivity to shock loads and temperature changes

  • Flexibility for different IFAS configurations to achieve high quality effluent